ryan's struct patch for gcc 2.95

[taylor/freespace2.git] / src / hud / hud.cpp

/*
 * Copyright (C) Volition, Inc. 1999.  All rights reserved.
 *
 * All source code herein is the property of Volition, Inc. You may not sell 
 * or otherwise commercially exploit the source or things you created based on
 * the source.
 */

/*
 * $Logfile: /Freespace2/code/Hud/HUD.cpp $
 * $Revision$
 * $Date$
 * $Author$
 *
 * C module that contains all the HUD functions at a high level
 *
 * $Log$
 * Revision 1.3  2002/06/17 06:33:09  relnev
 * ryan's struct patch for gcc 2.95
 *
 * Revision 1.2  2002/06/09 04:41:21  relnev
 * added copyright header
 *
 * Revision 1.1.1.1  2002/05/03 03:28:09  root
 * Initial import.
 *
 * 
 * 58    10/28/99 2:04a Jefff
 * some german specific coords.  
 * 
 * 57    10/25/99 5:43p Jefff
 * added (and subsequently commented) some scoring debug code.  checked in
 * to work on later
 * 
 * 56    9/09/99 3:55a Andsager
 * Reset Hud_support_objnum to -1 when guage stops displaying
 * 
 * 55    9/01/99 11:16a Andsager
 * Fix bug where support ship guage would not show up if second support
 * ship called in whlile 1st one dying.
 * 
 * 54    8/23/99 1:49p Dave
 * Fixed damage popup (hopefully)
 * 
 * 53    8/23/99 11:34a Dave
 * Fixed shield intensity rendering problems.
 * 
 * 52    8/19/99 6:16p Jefff
 * 
 * 51    8/17/99 7:15p Jefff
 * auto-target & auto-speed text drawn in code
 * 
 * 50    8/16/99 4:04p Dave
 * Big honking checkin.
 * 
 * 49    8/09/99 3:47p Dave
 * Fixed incorrect nebula regeneration. Default HUD to low-contrast in
 * non-nebula missions.
 * 
 * 48    8/09/99 3:14p Dave
 * Make "launch" warning gauge draw in code.
 * 
 * 47    8/05/99 2:05a Dave
 * Fixes. Optimized detail level stuff.
 * 
 * 46    8/04/99 2:56p Jefff
 * fixed black box behind pilot head in hi-res
 * 
 * 45    8/04/99 9:54a Andsager
 * Auto target turrets on big ships.
 * 
 * 44    8/01/99 12:39p Dave
 * Added HUD contrast control key (for nebula).
 * 
 * 43    7/31/99 4:15p Dave
 * Fixed supernova particle velocities. Handle OBJ_NONE in target
 * monitoring view. Properly use objectives notify gauge colors.
 * 
 * 42    7/31/99 1:16p Dave
 * Use larger font for 1024 HUD flash text box. Make beam weapons aware of
 * weapon subsystem damage on firing ship.
 * 
 * 41    7/26/99 10:41a Jefff
 * added call to hud_maybe_show_damage() in hud_render_2d().  not sure how
 * this got out in the 1st place.
 * 
 * 40    7/24/99 1:54p Dave
 * Hud text flash gauge. Reworked dead popup to use 4 buttons in red-alert
 * missions.
 * 
 * 39    7/22/99 4:00p Dave
 * Fixed beam weapon muzzle glow rendering. Externalized hud shield info.
 * 
 * 38    7/21/99 8:10p Dave
 * First run of supernova effect.
 * 
 * 37    7/21/99 3:19p Jefff
 * adjusted subspace and red alert popup text coords
 * 
 * 36    7/19/99 2:13p Dave
 * Added some new strings for Heiko.
 * 
 * 35    7/19/99 11:48a Jefff
 * Countermeasure success sound added
 * 
 * 34    7/16/99 12:22p Jefff
 * Added sound FX to objective popups
 * 
 * 33    7/15/99 7:16p Jefff
 * Red Alert box is now red
 * 
 * 32    7/09/99 12:00a Andsager
 * Added target box with distance for remote detonate weapons
 * 
 * 31    6/28/99 4:33p Jasenw
 * Fixed coords for hi res engine wash gauge
 * 
 * 30    6/11/99 11:13a Dave
 * last minute changes before press tour build.
 * 
 * 29    6/10/99 3:43p Dave
 * Do a better job of syncing text colors to HUD gauges.
 * 
 * 28    6/08/99 1:14a Dave
 * Multi colored hud test.
 * 
 * 27    6/07/99 4:20p Andsager
 * Add HUD color for tagged object.  Apply to target and radar.
 * 
 * 26    5/28/99 5:36p Andsager
 * stupid comment
 * 
 * 25    5/28/99 10:00a Andsager
 * Make player hud target affected by Nebula range
 * 
 * 24    5/22/99 5:35p Dave
 * Debrief and chatbox screens. Fixed small hi-res HUD bug.
 * 
 * 23    5/21/99 5:36p Andsager
 * Put in high res engine wash gauge and approx coords
 * 
 * 22    5/21/99 1:44p Andsager
 * Add engine wash gauge
 * 
 * 21    4/20/99 6:39p Dave
 * Almost done with artillery targeting. Added support for downloading
 * images on the PXO screen.
 * 
 * 20    2/25/99 4:19p Dave
 * Added multiplayer_beta defines. Added cd_check define. Fixed a few
 * release build warnings. Added more data to the squad war request and
 * response packets.
 * 
 * 19    2/24/99 4:02p Dave
 * Fixed weapon locking and homing problems for multiplayer dogfight mode.
 * 
 * 18    2/17/99 2:10p Dave
 * First full run of squad war. All freespace and tracker side stuff
 * works.
 * 
 * 17    2/03/99 8:37a Jasen
 * Fixed dock in coords
 * 
 * 16    2/01/99 9:24a Jasen
 * Fixed subspace and objectives displays for hi res.
 * 
 * 15    1/25/99 5:03a Dave
 * First run of stealth, AWACS and TAG missile support. New mission type
 * :)
 * 
 * 14    1/21/99 9:28p Dave
 * Fixed damage gauge coords.
 * 
 * 13    1/07/99 9:05a Jasen
 * coords, coords, coords
 * 
 * 12    1/06/99 3:24p Dave
 * Fixed stupid code.
 * 
 * 11    1/06/99 3:14p Jasen
 * more new coords
 * 
 * 10    1/06/99 2:33p Jasen
 * updated coords
 * 
 * 9     1/06/99 1:27p Dave
 * Removed duplicate global var.
 * 
 * 8     1/06/99 1:26p Dave
 * Put in seperate X coords for "dock in" and the associated time value
 * for the support ship gauge.
 * 
 * 7     12/28/98 3:17p Dave
 * Support for multiple hud bitmap filenames for hi-res mode.
 * 
 * 6     12/21/98 5:02p Dave
 * Modified all hud elements to be multi-resolution friendly.
 * 
 * 5     12/18/98 1:13a Dave
 * Rough 1024x768 support for Direct3D. Proper detection and usage through
 * the launcher.
 * 
 * 4     11/05/98 4:18p Dave
 * First run nebula support. Beefed up localization a bit. Removed all
 * conditional compiles for foreign versions. Modified mission file
 * format.
 * 
 * 3     10/13/98 9:28a Dave
 * Started neatening up freespace.h. Many variables renamed and
 * reorganized. Added AlphaColors.[h,cpp]
 * 
 * 2     10/07/98 10:53a Dave
 * Initial checkin.
 * 
 * 1     10/07/98 10:49a Dave
 * 
 * 223   8/28/98 3:28p Dave
 * EMP effect done. AI effects may need some tweaking as required.
 * 
 * 222   8/25/98 1:48p Dave
 * First rev of EMP effect. Player side stuff basically done. Next comes
 * AI code.
 * 
 * 221   8/09/98 4:45p Lawrance
 * center various HUD text - fixes problems in the German version
 * 
 * 220   6/18/98 10:10a Allender
 * fixed compiler warnings
 * 
 * 219   6/17/98 11:03a Lawrance
 * position subspace notify correctly for german version
 * 
 * 218   6/13/98 10:48p Lawrance
 * Changed code to utilize proper fixed-space 1 character.
 * 
 * 217   6/13/98 6:01p Hoffoss
 * Externalized all new (or forgot to be added) strings to all the code.
 * 
 * 216   6/12/98 2:49p Dave
 * Patch 1.02 changes.
 * 
 * 215   6/09/98 10:31a Hoffoss
 * Created index numbers for all xstr() references.  Any new xstr() stuff
 * added from here on out should be added to the end if the list.  The
 * current list count can be found in FreeSpace.cpp (search for
 * XSTR_SIZE).
 * 
 * 214   6/01/98 11:43a John
 * JAS & MK:  Classified all strings for localization.
 * 
 * 213   5/23/98 4:14p John
 * Added code to preload textures to video card for AGP.   Added in code
 * to page in some bitmaps that weren't getting paged in at level start.
 * 
 * 212   5/17/98 3:32p Lawrance
 * Allow red alert orders to get downloaded when in an out-of-cockpit view
 * 
 * 211   5/15/98 8:36p Lawrance
 * Add 'target ship that last sent transmission' target key
 * 
 * 210   5/10/98 5:28p Lawrance
 * Ensure hud messages and talking heads show up when viewing from another
 * ship
 * 
 * 209   5/10/98 12:11a Lawrance
 * Fix a couple of problems with 2D gauges showing up in external views
 * 
 * 208   5/09/98 4:52p Lawrance
 * Implement padlock view (up/rear/left/right)
 * 
 * 207   5/09/98 12:20a Lawrance
 * Show hud messages in all views
 * 
 * 206   5/08/98 5:32p Lawrance
 * Allow cargo scanning even if target gauge is disabled
 * 
 * 205   5/08/98 10:13a Lawrance
 * Don't allow targeting of ships that have SF_EXPLODED flag set
 * 
 * 204   5/07/98 1:01a Chad
 * Yet another hud gauage which shouldn't be rendered as a multiplayer
 * observer.
 * 
 * 203   5/04/98 12:08p Ed
 * from allender:  move hud_target_change_check() after code which does
 * possible auto target change.  Fixed multiplayer problem where locking
 * subsys does not match ship currently targeted
 * 
 * 202   5/04/98 6:12p Lawrance
 * Write generic function hud_end_string_at_first_hash_symbol(), to use in
 * various spots on the HUD
 * 
 * 201   4/30/98 3:32p Lawrance
 * Cull dead/departed ships from escort ship in hud_update_frame()
 * 
 * 200   4/23/98 10:24p Mike
 * Int3(), then recover gracefully from some error in which ship to be
 * repaired is killed. 
 * 
 * $NoKeywords: $
 *
*/

#include "pstypes.h"
#include "freespace.h"
#include "systemvars.h"
#include "hud.h"
#include "hudtarget.h"
#include "hudreticle.h"
#include "hudmessage.h"
#include "sound.h"
#include "player.h"
#include "multi.h"
#include "multiutil.h"
#include "gamesnd.h"
#include "hudsquadmsg.h"
#include "timer.h"
#include "eventmusic.h"
#include "hudlock.h"
#include "hudets.h"
#include "2d.h"
#include "3d.h"
#include "ai.h"
#include "aigoals.h"
#include "hudescort.h"
#include "hudshield.h"
#include "linklist.h"
#include "hudtargetbox.h"
#include "missionmessage.h"
#include "missiontraining.h"
#include "bmpman.h"
#include "radar.h"
#include "hudobserver.h"
#include "hudtargetbox.h"
#include "hudconfig.h"
#include "missiongoals.h"
#include "asteroid.h"
#include "starfield.h"
#include "hudwingmanstatus.h"
#include "multi_voice.h"
#include "multi_pmsg.h"
#include "redalert.h"
#include "emp.h"
#include "alphacolors.h"
#include "localize.h"
#include "supernova.h"
#include "font.h"

// new values for HUD alpha
#define HUD_NEW_ALPHA_DIM                               80      
#define HUD_NEW_ALPHA_NORMAL                    120
#define HUD_NEW_ALPHA_BRIGHT                    220

// high contrast
#define HUD_NEW_ALPHA_DIM_HI                    130
#define HUD_NEW_ALPHA_NORMAL_HI         190
#define HUD_NEW_ALPHA_BRIGHT_HI         255

// globals that will control the color of the HUD gauges
int HUD_color_red = 0;
int HUD_color_green = 255;
int HUD_color_blue = 0;
int HUD_color_alpha = HUD_COLOR_ALPHA_DEFAULT;          // 1 -> HUD_COLOR_ALPHA_USER_MAX

int HUD_contrast = 0;                                                                           // high or lo contrast (for nebula, etc)

color HUD_color_defaults[HUD_NUM_COLOR_LEVELS];         // array of colors with different alpha blending
color HUD_color_debug;                                                                          // grey debug text shown on HUD

static int Player_engine_snd_loop = -1;

// animations for damages gauges
hud_anim Target_static;
hud_anim        Radar_static;

// HUD render frame offsets
float HUD_offset_x = 0.0f;
float HUD_offset_y = 0.0f;

// Global: integrity of player's target
float Pl_target_integrity;

static int Hud_last_can_target; // whether Player is able to target in the last frame
static int Hud_can_target_timer;        // timestamp to allow target gauge to draw static once targeting functions are not allowed

// centered text message gauges (collision, emp, etc)
char Hud_text_flash[512] = "";
int Hud_text_flash_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                -1, 172
        },
        { // GR_1024
                -1, 275
        }
};
void hud_init_text_flash_gauge();
void hud_start_text_flash(char *txt, int t);
void hud_maybe_show_text_flash_icon();


// multiplayer messaging text
int Multi_msg_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                5, 150
        },
        { // GR_1024
                8, 240
        }
};

// multiplayer voice stuff
int Voice_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                5, 165
        },
        { // GR_1024
                8, 255
        }
};

// redalert downloading new orders text
int Red_text_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                -1, 116
        },
        { // GR_1024
                -1, 186
        }
};
int Red_text_val_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                -1, 124
        },
        { // GR_1024
                -1, 194
        }
};

// subspace popup
int Subspace_text_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                -1, 116
        },
        { // GR_1024
                -1, 186
        }
};
int Subspace_text_val_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                100, 124
        },
        { // GR_1024
                140, 194
        }
};

// message text coords
int Head_message_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                7, 37
        },
        { // GR_1024
                11, 57
        }
};

// ping text coords
int Ping_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                560, 3
        },
        { // GR_1024
                896, 5
        }
};

// supernova coords
int Supernova_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                100, 100
        },
        { // GR_1024
                170, 170
        }
};
        
// used to draw the netlag icon on the HUD
hud_frames Netlag_icon;
int Netlag_icon_loaded=0;
int Netlag_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                386, 331
        },
        { // GR_1024
                627, 529
        }
};
char Netlag_fname[GR_NUM_RESOLUTIONS][MAX_FILENAME_LEN] = {
        "netlag1",
        "netlag1"
};

// used to draw the kills gauge
hud_frames Kills_gauge;
int Kills_gauge_loaded = 0;
int Kills_gauge_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                497, 361
        },
        { // GR_1024
                880, 624
        }
};
int Kills_text_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                503, 365
        },
        { // GR_1024
                886, 628
        }
};

#if defined(GERMAN_BUILD)
        int Kills_text_val_coords[GR_NUM_RESOLUTIONS][2] = {
                { // GR_640
                        615, 365
                },
                { // GR_1024
                        984, 628
                }
        };
#else
        int Kills_text_val_coords[GR_NUM_RESOLUTIONS][2] = {
                { // GR_640
                        571, 365
                },
                { // GR_1024
                        954, 628
                }
        };
#endif

char Kills_fname[GR_NUM_RESOLUTIONS][MAX_FILENAME_LEN] = {
        "kills1",
        "kills1"
};

// used to draw border around a talking head
static hud_frames Head_frame_gauge;
static int Head_frame_gauge_loaded = 0;
int Head_frame_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                5, 35
        },
        { // GR_1024
                5, 56
        }
};
char Head_fname[GR_NUM_RESOLUTIONS][MAX_FILENAME_LEN] = {
        "head1",
        "head1"
};

// mission time frame
static hud_frames Mission_time_gauge;
static int Mission_time_gauge_loaded = 0;
int Mission_time_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                587, 448
        },
        { // GR_1024
                969, 716
        }
};
int Mission_time_text_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                591, 452
        },
        { // GR_1024
                973, 720
        }
};
int Mission_time_text_val_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                613, 460
        },
        { // GR_640
                995, 728
        }
};
char Mission_time_fname[GR_NUM_RESOLUTIONS][MAX_FILENAME_LEN] = {
        "time1",
        "time1"
};

// used to draw the hud support view
static hud_frames Support_view_gauge;
static int Support_view_gauge_loaded = 0;
static int Hud_support_view_active;
static int Hud_support_view_abort;              // active when we need to display abort message
static int Hud_support_view_fade;               // timer
static int Hud_support_obj_sig, Hud_support_objnum, Hud_support_target_sig;
int Support_view_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                265, 334
        },
        { // GR_1024
                459, 534
        }
};
int Support_text_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                267, 335
        },
        { // GR_1024
                462, 536
        }
};
int Support_text_val_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                -1, 348
        },
        { // GR_1024
                -1, 546
        }
};
int Support_text_dock_coords[GR_NUM_RESOLUTIONS][2] = {                 // "dock in" x coord
        { // GR_640
                270, -1
        },
        { // GR_1024
                465, -1
        }
};
int Support_text_dock_val_coords[GR_NUM_RESOLUTIONS][2] = {             // time value for "dock in" x coord
        { // GR_640
                328, -1
        },
        { // GR_1024
                524, -1
        }
};
char Support_fname[GR_NUM_RESOLUTIONS][MAX_FILENAME_LEN] = {
        "support1",
        "support1"
};

// damage gauge stuff
#define NUM_DAMAGE_GAUGES       3
static hud_frames Damage_gauges[NUM_DAMAGE_GAUGES];
static int Damage_gauges_loaded = 0;
char *Damage_gauge_fnames[GR_NUM_RESOLUTIONS][NUM_DAMAGE_GAUGES] = 
{
        //XSTR:OFF
        { // GR_640
                "damage1",
                "damage2",
                "damage3",
        },
        { // GR_1024
                "damage1",
                "damage2",
                "damage3",
        }
//XSTR:ON
};
int Damage_gauge_line_h[GR_NUM_RESOLUTIONS] = { 
        9, 
        9
};
int Damage_gauge_coords[GR_NUM_RESOLUTIONS][2][2] = {
        { // GR_640
                {245, 38},
                {245, 63}
        },
        { // GR_1024
                {440, 61},
                {440, 86}
        }
        // These #'s seem to work, although I really don't know why. Frankly, it frightens me,
        // because it means the 640 coords _shouldn't_. This may be due to D3D strangeness, so
        // we'll have to investigate when we get hi-res Glide in.
};
int Damage_text_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                248, 40
        },
        { // GR_1024
                443, 63
        }
};
int Hull_integ_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                249, 53
        },
        { // GR_1024
                444, 76
        }
};
int Hull_integ_val_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                387, 53
        },
        { // GR_1024
                582, 76
        },
};
int Damage_subsys_text_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                249, 65
        },
        { // GR_1024
                444, 88
        }
};


// flashing gauges
#define HUD_GAUGE_FLASH_DURATION                5000
#define HUD_GAUGE_FLASH_INTERVAL                200
int HUD_gauge_flash_duration[NUM_HUD_GAUGES];
int HUD_gauge_flash_next[NUM_HUD_GAUGES];
int HUD_gauge_bright;

// Objective display
typedef struct objective_display_info
{
        int display_timer;
        int goal_type;
        int goal_status;
        int goal_ntotal;
        int goal_nresolved;

} objective_display_info;

static objective_display_info Objective_display;

static int                      Objective_display_gauge_inited=0;
static hud_frames       Objective_display_gauge;
int Objective_display_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                245, 114
        },
        { // GR_1024
                436, 184
        }
};
int Objective_text_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                -1, 116
        },
        { // GR_1024
                -1, 186
        }
};
int Objective_text_val_coords[GR_NUM_RESOLUTIONS][2] = {
        { // GR_640
                -1, 125
        },
        { // GR_1024
                -1, 195
        }
};
char Objective_fname[GR_NUM_RESOLUTIONS][MAX_FILENAME_LEN] = {
        "objective1",
        "objective1"
};

// Subspace notify display
static int Subspace_notify_active;
static int Objective_notify_active;
static int HUD_abort_subspace_timer = 1;

// used to track how player subsystems are getting damaged
typedef struct hud_subsys_info
{
        float   last_str;
        int     flash_duration_timestamp;
} hud_subsys_info;

static hud_subsys_info  Pl_hud_subsys_info[SUBSYSTEM_MAX];
static int                                      Pl_hud_next_flash_timestamp;
static int                                      Pl_hud_is_bright;

#define SUBSYS_DAMAGE_FLASH_DURATION    1800
#define SUBSYS_DAMAGE_FLASH_INTERVAL    100

// timers used for popup gauges
int HUD_popup_timers[NUM_HUD_GAUGES];

// forward declarations
void update_throttle_sound();
void hud_show_damage_popup();
void hud_damage_popup_init();
void hud_support_view_init();
void hud_gauge_flash_init();
void hud_objective_message_init();
void hud_maybe_display_objective_message();
void hud_stop_subspace_notify();
void hud_start_subspace_notify();
void hud_stop_objective_notify();
void hud_start_objective_notify();
int hud_subspace_notify_active();
int hud_objective_notify_active();
void hud_subspace_notify_abort();
void hud_maybe_display_subspace_notify();
void hud_init_netlag_icon();
void hud_maybe_show_netlag_icon();
void hud_maybe_display_red_alert();
void hud_init_kills_gauge();
void hud_show_kills_gauge();
int hud_maybe_render_emp_icon();
void hud_init_emp_icon();

//      Saturate a value in minv..maxv.
void saturate(int *i, int minv, int maxv)
{
        if (*i < minv)
                *i = minv;
        else if (*i > maxv)
                *i = maxv;
}

// init the colors used for the different shades of the HUD
void HUD_init_hud_color_array()
{
        int i;

        for ( i = 0; i < HUD_NUM_COLOR_LEVELS; i++ ) {
                gr_init_alphacolor( &HUD_color_defaults[i], HUD_color_red, HUD_color_green, HUD_color_blue, (i+1)*16 );
        }
}

// HUD_init will call all the various HUD gauge init functions.  This function is called at the
// start of each mission (level)
void HUD_init_colors()
{
        saturate(&HUD_color_red, 0, 255);
        saturate(&HUD_color_green, 0, 255);
        saturate(&HUD_color_blue, 0, 255);
        saturate(&HUD_color_alpha, 0, HUD_COLOR_ALPHA_USER_MAX);

        gr_init_alphacolor( &HUD_color_debug, 128, 255, 128, HUD_color_alpha*16 );
        HUD_init_hud_color_array();

        hud_init_targeting_colors();
        hud_gauge_flash_init();
}

// The following global data is used to determine if we should change the engine sound.
// We only check if the throttle has changed every THROTTLE_SOUND_CHECK_INTERVAL ms, and
// then we make sure that the throttle has actually changed.  If it has changed, we start
// a new sound and/or adjust the volume.  This occurs in update_throttle_sound()
//
static float last_percent_throttle;
#define THROTTLE_SOUND_CHECK_INTERVAL   50      // in ms
static int throttle_sound_check_id;

// used for the display of damaged subsystems
typedef struct hud_subsys_damage
{
        int     str;
        int     type;
        char    *name;
} hud_subsys_damage;

#define DAMAGE_FLASH_TIME 150
static int Damage_flash_bright;
static int Damage_flash_timer;

// initialize the timers used for popup gauges
void hud_init_popup_timers()
{
        int i;
        for (i=0; i<NUM_HUD_GAUGES; i++) {
                HUD_popup_timers[i] = timestamp(0);
        }
}

// Load in the bitmap for the talking head gauge if required
void hud_init_talking_head_gauge()
{
        // ensure the talking head border is loaded
        if ( !Head_frame_gauge_loaded ) {
                Head_frame_gauge.first_frame = bm_load_animation(Head_fname[gr_screen.res], &Head_frame_gauge.num_frames);
                if ( Head_frame_gauge.first_frame == -1 ) {
                        Warning(LOCATION, "Could not load in ani: Head_fname[gr_screen.res]\n");
                }
                Head_frame_gauge_loaded = 1;
        }
}

// Load in the bitmap for the mission time gauge if required
void hud_init_mission_time_gauge()
{
        // ensure the talking head border is loaded
        if ( !Mission_time_gauge_loaded ) {
                Mission_time_gauge.first_frame = bm_load_animation(Mission_time_fname[gr_screen.res], &Mission_time_gauge.num_frames);
                if ( Mission_time_gauge.first_frame == -1 ) {
                        Warning(LOCATION, "Could not load in ani: Mission_time_fname[gr_screen.res]\n");
                }
                Mission_time_gauge_loaded = 1;
        }
}

// ----------------------------------------------------------------------
// HUD_init()
//
// Called each level to initalize HUD systems
//
void HUD_init()
{
        HUD_init_colors();
        hud_init_msg_window();
        hud_init_targeting();
        hud_init_reticle();
        hud_shield_level_init();
        hud_init_ets();
        hud_targetbox_init();
        hud_escort_init();
        hud_damage_popup_init();
        hud_support_view_init();
        hud_init_squadmsg();            // initialize the vars needed for squadmate messaging
        hud_init_popup_timers();
        hud_objective_message_init();
        hud_init_wingman_status_gauge();
        hud_anim_init(&Target_static, Target_window_coords[gr_screen.res][0], Target_window_coords[gr_screen.res][1], NOX("TargetStatic"));
        hud_targetbox_static_init();
        hud_init_text_flash_gauge();
        hud_init_netlag_icon(); 
        hud_init_talking_head_gauge();
        hud_init_mission_time_gauge();
        hud_init_kills_gauge();
        hud_stop_subspace_notify();
        hud_stop_objective_notify();
        hud_target_last_transmit_level_init();

        throttle_sound_check_id = timestamp(THROTTLE_SOUND_CHECK_INTERVAL);
        HUD_abort_subspace_timer = 1;
        Hud_last_can_target = 1;
        Hud_can_target_timer = 1;
        last_percent_throttle = 0.0f;

        // default to high contrast in the nebula
        HUD_contrast = 0;
        if(The_mission.flags & MISSION_FLAG_FULLNEB){
                HUD_contrast = 1;
        } 
}

// return !0 if HUD is disabled (ie no gauges are shown/usable), otherwise return 0
int hud_disabled()
{
        // if ( Ship_info[Player_ship->ship_info_index].species != SPECIES_TERRAN ) {
                //return 1;
        //}

        return 0;
}

// Determine if we should popup the weapons gauge on the HUD.
void hud_maybe_popup_weapons_gauge()
{
        if ( hud_gauge_is_popup(HUD_WEAPONS_GAUGE) ) {
                ship_weapon *swp = &Player_ship->weapons;
                int                     i;

                for ( i = 0; i < swp->num_secondary_banks; i++ ) {
                        if ( swp->secondary_bank_ammo[i] > 0 ) {
                                int ms_till_fire = timestamp_until(swp->next_secondary_fire_stamp[i]);
                                if ( ms_till_fire >= 1000 ) {
                                        hud_gauge_popup_start(HUD_WEAPONS_GAUGE, 2500);
                                }
                        }
                }
        }
}

// hud_update_frame() will update hud systems
//
// This function updates those parts of the hud that are not dependant on the
// rendering of the hud.
void hud_update_frame()
{
        object  *targetp;
        int             can_target;

        update_throttle_sound();
        hud_check_reticle_list();
        hud_wingman_status_update();

        // Check hotkey selections to see if any ships need to be removed
        hud_prune_hotkeys();

        // Remove dead/departed ships from the escort list
        hud_escort_cull_list();

        hud_update_reticle( Player );
        hud_shield_hit_update();
        hud_maybe_popup_weapons_gauge();        

        // if emp is active we have to allow targeting by the "random emp" system
        // we will intercept player targeting requests in hud_sensors_ok() when checking key commands
        // DB - 8/24/98
        can_target = hud_sensors_ok(Player_ship, 0);
        if(emp_active_local()){
                can_target = 1;
        }
        if ( !can_target && Hud_last_can_target ) {
                Hud_can_target_timer = timestamp(1200);         
        }
        Hud_last_can_target = can_target;

        if ( timestamp_elapsed(Hud_can_target_timer) ) {
                if ( (Player_ai->target_objnum != -1) && !can_target ){
                        Player_ai->target_objnum = -1;
                }
        }

        // if there is no target, check if auto-targeting is enabled, and select new target
        int retarget = 0;
        int retarget_turret = 0;

        if (Player_ai->target_objnum == -1){
                retarget = 1;
        } else if (Objects[Player_ai->target_objnum].type == OBJ_SHIP) {
                if (Ships[Objects[Player_ai->target_objnum].instance].flags & SF_DYING){
                        if (timestamp_elapsed(Ships[Objects[Player_ai->target_objnum].instance].final_death_time)) {
                                retarget = 1;
                        }
                }
        }

        // check if big ship and currently selected subsys is turret and turret is dead
        // only do this is not retargeting
        if ((!retarget) && (Player_ai->target_objnum != -1)) {
                if (Objects[Player_ai->target_objnum].type == OBJ_SHIP) {
                        if ( !(Ships[Objects[Player_ai->target_objnum].instance].flags & SF_DYING) ) {
                                if ( Ship_info[Ships[Objects[Player_ai->target_objnum].instance].ship_info_index].flags & (SIF_BIG_SHIP | SIF_HUGE_SHIP) ) {
                                        ship_subsys *ss = Player_ai->targeted_subsys;
                                        if (ss != NULL) {
                                                if ((ss->system_info->type == SUBSYSTEM_TURRET) && (ss->current_hits == 0)) {
                                                        retarget_turret = 1;
                                                }
                                        }
                                }
                        }
                }
        }

        if ( retarget && can_target ) {
                Player_ai->current_target_is_locked = 0;
                if ( Players[Player_num].flags & PLAYER_FLAGS_AUTO_TARGETING ) {
                        Player_ai->target_objnum = -1;
                        hud_target_auto_target_next();
                }
        }

        if (retarget_turret && can_target) {
                Assert(!retarget);
                // get closest weighted live turret
                // hud_target_closest(OBJ_INDEX(Player_obj), FALSE, FALSE);
                void hud_update_closest_turret();
                hud_update_closest_turret();
        }

        hud_target_change_check();

        if (Player_ai->target_objnum == -1) {
                if ( Target_static_looping != -1 ) {
                        snd_stop(Target_static_looping);
                }
                return;
        }

        targetp = &Objects[Player_ai->target_objnum];


        int stop_targetting_this_thing = 0;

        // check to see if the target is still alive
        if ( targetp->flags&OF_SHOULD_BE_DEAD ) {
                stop_targetting_this_thing = 1;
        }

        Player->target_is_dying = FALSE;
        ship    *target_shipp = NULL;
        
        if ( targetp->type == OBJ_SHIP ) {
                Assert ( targetp->instance >=0 && targetp->instance < MAX_SHIPS );
                target_shipp = &Ships[targetp->instance];
                Player->target_is_dying = target_shipp->flags & SF_DYING;

                // If it is warping out (or exploded), turn off targeting
                if ( target_shipp->flags & (SF_DEPART_WARP|SF_EXPLODED) ) {
                        stop_targetting_this_thing = 1;
                }
        }

        // Check if can still be seen in Nebula
        if ( hud_target_invalid_awacs(targetp) ) {
                stop_targetting_this_thing = 1;
        }

        // If this was found to be something we shouldn't
        // target anymore, just remove it
        if ( stop_targetting_this_thing )       {
                Player_ai->target_objnum = -1;
                Player_ai->targeted_subsys = NULL;
                hud_stop_looped_locking_sounds();
        }
        
        if (Player->target_is_dying) {
                hud_stop_looped_locking_sounds();
                if ( Players[Player_num].flags & PLAYER_FLAGS_AUTO_TARGETING ) {
                        hud_target_auto_target_next();
                }
        }

        // Switch to battle track when a targeted ship is hostile and within BATTLE_START_MIN_TARGET_DIST
        if (targetp->type == OBJ_SHIP && Event_Music_battle_started == 0 ) {
                Assert( target_shipp != NULL );

                if (opposing_team_mask(Player_ship->team)) {
                        float   dist_to_target;

                        dist_to_target = vm_vec_dist_quick(&targetp->pos, &Player_obj->pos);
                        if (dist_to_target < BATTLE_START_MIN_TARGET_DIST) {

                                // If the target has an AI class of none, it is a Cargo, NavBuoy or other non-aggressive
                                // ship, so don't start the battle music        
                                if (stricmp(Ai_class_names[Ai_info[target_shipp->ai_index].ai_class], NOX("none")))
                                        event_music_battle_start();
                        }
                }
        }

        // Since we need to reference the player's target integrity in several places this upcoming 
        // frame, only calculate once here
        if ( target_shipp ) {
                float initial_hull;
                initial_hull = Ship_info[target_shipp->ship_info_index].initial_hull_strength;
                if (  initial_hull <= 0 ) {
                        Int3(); // illegal initial hull strength
                        Pl_target_integrity = 0.0f;
                } else {
                        Pl_target_integrity = targetp->hull_strength / initial_hull;
                        if (Pl_target_integrity < 0)
                                Pl_target_integrity = 0.0f;
                }
        }

        hud_update_cargo_scan_sound();

}

void HUD_render_forward_icon(object *objp)
{
        vertex  v0;
        vector  p0;

        vm_vec_scale_add(&p0, &objp->pos, &objp->orient.v.fvec, 100.0f);
        g3_rotate_vertex(&v0, &p0);

        gr_set_color(255, 0, 0);
        if ((!(v0.flags & PF_OVERFLOW)) && (v0.codes == 0)) // make sure point projected
                g3_draw_sphere(&v0, 1.25f);
        else if (v0.codes != 0) { // target center is not on screen
                // draw the offscreen indicator at the edge of the screen where the target is closest to
                hud_draw_offscreen_indicator(&v0, &p0);
        }
}

// Draw white brackets around asteroids which has the AF_DRAW_BRACKETS flag set
void hud_show_asteroid_brackets()
{
        if ( hud_sensors_ok(Player_ship, 0) ) {
                asteroid_show_brackets();
        }
}

// Draw radar gauge on the HUD
void hud_show_radar()
{
        if ( hud_disabled() ) {
                return;
        }

        if (!(Viewer_mode & (VM_EXTERNAL | VM_SLEWED | VM_CHASE | VM_DEAD_VIEW | VM_WARP_CHASE | VM_PADLOCK_ANY ))) {
                if ( Game_detail_flags & DETAIL_FLAG_HUD )      {
                        if ( hud_gauge_active(HUD_RADAR) ) {
                                HUD_reset_clip();
                                radar_frame_render(flFrametime);
                        }
                }
        }
}

// Render model of target in the target view box
void hud_show_target_model()
{
        if ( hud_disabled() ) {
                return;
        }

        // display the miniature model of the target in the target box and shade
        if ( Game_detail_flags & DETAIL_FLAG_HUD )      {
                if (!(Viewer_mode & (VM_EXTERNAL | VM_SLEWED | VM_CHASE | VM_DEAD_VIEW | VM_WARP_CHASE | VM_PADLOCK_ANY)))
                        hud_render_target_model();
        }
}

void hud_show_common_3d_gauges(float frametime, int in_cockpit)
{
        // draw boxes around current selection set, if any
        hud_show_selection_set();

        // draw the targeting data around any message sender
        hud_show_message_sender();

        // draw brackets around asteroids is necessary
        hud_show_asteroid_brackets();

        // draw targetting data around the current target
        hud_show_targeting_gauges(frametime, in_cockpit);

        // draw brackets and distance to remote detonate missile
        hud_show_remote_detonate_missile();
}

// Render gauges that need to be between a g3_start_frame() and a g3_end_frame()
void HUD_render_3d(float frametime)
{
        Player->subsys_in_view = -1;

        if ( hud_disabled() ) {
                return;
        }

        if (!(Viewer_mode & (VM_EXTERNAL | VM_SLEWED | VM_CHASE | VM_DEAD_VIEW | VM_WARP_CHASE | VM_PADLOCK_ANY))) {

                hud_show_common_3d_gauges(frametime, 1);

                //      Show all homing missiles locked onto the player.
                //      Currently not supporting a way to toggle this as I'm not sure we'll stick wtih this gauge. -- MK, 3/17/97.
                if ( hud_gauge_active(HUD_MISSILE_WARNING_ARROW) ) {
                        hud_show_homing_missiles();
                }

        } else if ( Viewer_mode & (VM_CHASE | VM_EXTERNAL | VM_WARP_CHASE | VM_PADLOCK_ANY ) ) {
                // If the player is warping out, don't draw the targeting gauges
                Assert(Player != NULL);
                if ( Player->control_mode != PCM_NORMAL ) {
                        return;
                }

                hud_show_common_3d_gauges(frametime, 0);
        }

        if (Viewer_mode & VM_SLEWED) {
                HUD_render_forward_icon(Player_obj);
        }
}


// call from HUD_render_2d() when in gameplay, and call when in navmap
void hud_show_messages()
{
        // draw the message window
        hud_show_msg_window();
        hud_show_fixed_text();
}

// decide if we want to blit damage status to the screen
void hud_maybe_show_damage()
{
        if ( !hud_gauge_active(HUD_DAMAGE_GAUGE) ) {
                return;
        }

        // display the current weapon info for the player ship, with ammo/energy counts
        if ( hud_gauge_active(HUD_DAMAGE_GAUGE) ) {
                int show_gauge_flag;

                if ( (Ship_info[Player_ship->ship_info_index].initial_hull_strength - Player_obj->hull_strength) > 1.0f ) {
                        show_gauge_flag = 1;
                } else {
                        show_gauge_flag = 0;
                }

                // is gauge configured as a popup?
                if ( hud_gauge_is_popup(HUD_DAMAGE_GAUGE) ) {
                        if ( !hud_gauge_popup_active(HUD_DAMAGE_GAUGE) ) {
                                show_gauge_flag=0;
                        }
                }
                        
                if ( show_gauge_flag ) {
                        hud_show_damage_popup();
                }
        }
}

// The damage toggle button was pressed, so change state
void hud_damage_popup_toggle()
{
        snd_play(&Snds[SND_SQUADMSGING_ON]);
        
        // If gague is disabled (off), make it on all the time
        if ( !hud_gauge_active(HUD_DAMAGE_GAUGE) ) {
                hud_config_set_gauge_flags(HUD_DAMAGE_GAUGE,1,0);               
                return;
        }

        // if gauge is popup, turn it off if it is current up, otherwise force it to be up
        if ( hud_gauge_is_popup(HUD_DAMAGE_GAUGE) ) {
                if ( Player_obj->hull_strength == Ship_info[Player_ship->ship_info_index].initial_hull_strength ) {
                        hud_config_set_gauge_flags(HUD_DAMAGE_GAUGE,1,0);               
                } else {
                        hud_config_set_gauge_flags(HUD_DAMAGE_GAUGE,0,0);               
                }
                return;
        }

        // gauge is on, without any popup... so force it to be off
        hud_config_set_gauge_flags(HUD_DAMAGE_GAUGE,0,0);               
}


// Display the current mission time in MM:SS format
void hud_show_mission_time()
{
        float mission_time, time_comp;
        int minutes=0;
        int seconds=0;
        
        mission_time = f2fl(Missiontime);  // convert to seconds

        minutes=(int)(mission_time/60);
        seconds=(int)mission_time%60;

        hud_set_gauge_color(HUD_MISSION_TIME);

        // blit background frame
        if ( Mission_time_gauge.first_frame >= 0 ) {
                GR_AABITMAP(Mission_time_gauge.first_frame, Mission_time_coords[gr_screen.res][0], Mission_time_coords[gr_screen.res][1]);                              
        }

        // print out mission time in MM:SS format
        gr_printf(Mission_time_text_coords[gr_screen.res][0], Mission_time_text_coords[gr_screen.res][1], NOX("%02d:%02d"), minutes, seconds);

        // display time compression as xN
        time_comp = f2fl(Game_time_compression);
        if ( time_comp < 1 ) {
                gr_printf(Mission_time_text_val_coords[gr_screen.res][0], Mission_time_text_val_coords[gr_screen.res][1], XSTR( "x%.1f", 215), time_comp);
        } else {
                gr_printf(Mission_time_text_val_coords[gr_screen.res][0], Mission_time_text_val_coords[gr_screen.res][1], XSTR( "x%.0f", 216), time_comp);
        }
}

// If a head animation is playing, then blit a border around it
void hud_maybe_blit_head_border()
{
        if ( Head_frame_gauge.first_frame == -1 ){
                return;
        }

        if ( message_anim_is_playing() ) {
                // draw frame
                // hud_set_default_color();
                hud_set_gauge_color(HUD_TALKING_HEAD);

                GR_AABITMAP(Head_frame_gauge.first_frame, Head_frame_coords[gr_screen.res][0], Head_frame_coords[gr_screen.res][1]);            

                // draw title
                gr_string(Head_message_coords[gr_screen.res][0], Head_message_coords[gr_screen.res][1], XSTR("message", 217));
        }
}

// Black out area behind head animation
void hud_maybe_clear_head_area()
{
        if ( Head_frame_gauge.first_frame == -1 ) {
                return;
        }

        if ( message_anim_is_playing() ) {
                // clear
                if (gr_screen.res == GR_640) {
                        HUD_set_clip(7, 45, 160, 120);          // these coords are set in MissionMessage.cpp
                } else {
                        HUD_set_clip(7, 66, 160, 120);
                }
                gr_clear();
                HUD_reset_clip();
        }
}

void hud_maybe_display_supernova()
{
        float time_left;

        // if there's a supernova coming
        time_left = supernova_time_left();
        if(time_left < 0.0f){
                return;
        }

        gr_set_color_fast(&Color_bright_red);
        gr_printf(Supernova_coords[gr_screen.res][0], Supernova_coords[gr_screen.res][1], "Supernova Warning : %.2f s", time_left);
}

// render multiplayer ping time to the server if appropriate
void hud_render_multi_ping()
{
        // if we shouldn't be displaying a ping time, return here
        if(!multi_show_ingame_ping()){
                return;
        }
        
        // if we're in multiplayer mode, display our ping time to the server
        if((Game_mode & GM_MULTIPLAYER) && (Net_player != NULL) && !(Net_player->flags & NETINFO_FLAG_AM_MASTER)){
                char ping_str[50];
                memset(ping_str,0,50);

                // if our ping is positive, display it
                if((Netgame.server != NULL) && (Netgame.server->s_info.ping.ping_avg > 0)){
                        // get the string
                        if(Netgame.server->s_info.ping.ping_avg >= 1000){
                                sprintf(ping_str,XSTR("> 1 sec",628));
                        } else {
                                sprintf(ping_str,XSTR("%d ms",629),Netgame.server->s_info.ping.ping_avg);
                        }

                        // blit the string out
                        hud_set_default_color();
                        gr_string(Ping_coords[gr_screen.res][0], Ping_coords[gr_screen.res][1], ping_str);
                }
        }
}

// render all the 2D gauges on the HUD
void HUD_render_2d(float frametime)
{
        int show_gauge_flag;

        HUD_reset_clip();

/*
        // show some scoring debug stuff
        {
                extern char Scoring_debug_text[];
                gr_string( 10, 40, Scoring_debug_text );
        }
*/
        if ( hud_disabled() ) {
                return;
        }

        if (!(Viewer_mode & (VM_EXTERNAL | VM_SLEWED | VM_CHASE | VM_DEAD_VIEW | VM_WARP_CHASE | VM_PADLOCK_ANY ))) {           
                // display Energy Transfer System gauges
                if ( hud_gauge_active(HUD_ETS_GAUGE) ) {
                        show_gauge_flag=1;
                        // is gauge configured as a popup?
                        if ( hud_gauge_is_popup(HUD_ETS_GAUGE) ) {
                                if ( !hud_gauge_popup_active(HUD_ETS_GAUGE) ) {
                                        show_gauge_flag=0;
                                }
                        }
                        
                        if ( show_gauge_flag ) {
                                hud_show_ets();
                        }
                }

                // display afterburner fuel gauge
                if ( hud_gauge_active(HUD_AFTERBURNER_ENERGY) ) {
                        hud_set_gauge_color(HUD_AFTERBURNER_ENERGY);
                        hud_show_afterburner_gauge();
                }               

                // text flash gauge
                hud_maybe_show_text_flash_icon();

                // maybe show the netlag icon
                if(Game_mode & GM_MULTIPLAYER){
                        hud_maybe_show_netlag_icon();

                        if(Net_player->flags & NETINFO_FLAG_OBSERVER){
                                hud_render_observer();                                  
                        }
                }

                // draw the reticle
                hud_show_reticle();

                /*
                // why is this here twice?
                // display Energy Transfer System gauges
                if ( hud_gauge_active(HUD_ETS_GAUGE) ) {
                        show_gauge_flag=1;
                        // is gauge configured as a popup?
                        if ( hud_gauge_is_popup(HUD_ETS_GAUGE) ) {
                                if ( !hud_gauge_popup_active(HUD_ETS_GAUGE) ) {
                                        show_gauge_flag=0;
                                }
                        }
                        
                        if ( show_gauge_flag ) {
                                hud_show_ets();
                        }
                }
                */

                // display info on the ships in the escort list
                if ( hud_gauge_active(HUD_ESCORT_VIEW) ) {
                        show_gauge_flag=1;
                        // is gauge configured as a popup?
                        if ( hud_gauge_is_popup(HUD_ESCORT_VIEW) ) {
                                if ( !hud_gauge_popup_active(HUD_ESCORT_VIEW) ) {
                                        show_gauge_flag=0;
                                }
                        }
                        
                        if ( show_gauge_flag ) {
                                hud_set_gauge_color(HUD_ESCORT_VIEW);
                                hud_display_escort();
                        }
                }

                // display the current weapon info for the player ship, with ammo/energy counts
                if ( hud_gauge_active(HUD_WEAPONS_GAUGE) ) {
                        show_gauge_flag=1;
                        // is gauge configured as a popup?
                        if ( hud_gauge_is_popup(HUD_WEAPONS_GAUGE) ) {
                                if ( !hud_gauge_popup_active(HUD_WEAPONS_GAUGE) ) {
                                        show_gauge_flag=0;
                                }
                        }
                        
                        if ( show_gauge_flag ) {
                                hud_show_weapons();
                        }
                }

                // display player countermeasures count
                if ( hud_gauge_active(HUD_CMEASURE_GAUGE) ) {
                        show_gauge_flag=1;
                        // is gauge configured as a popup?
                        if ( hud_gauge_is_popup(HUD_CMEASURE_GAUGE) ) {
                                if ( !hud_gauge_popup_active(HUD_CMEASURE_GAUGE) ) {
                                        show_gauge_flag=0;
                                }
                        }
                        
                        if ( show_gauge_flag ) {
                                hud_show_cmeasure_gague();
                        }
                }

                if ( hud_gauge_active(HUD_WEAPONS_ENERGY) ) {
                        hud_show_weapon_energy_gauge();
                }

                // show the auto-target icons
                hud_show_auto_icons();                          

                // draw a border around a talking head if it is playing
                hud_maybe_blit_head_border();

                // draw the status of support ship servicing the player
                hud_support_view_blit();

                // draw the damage status
                hud_maybe_show_damage();

                // show mission time 
                if ( hud_gauge_active(HUD_MISSION_TIME) ) {
                        hud_show_mission_time();
                }

                // show subspace notify gauge
                hud_maybe_display_subspace_notify();

                // show objective status gauge
                if ( hud_gauge_active(HUD_OBJECTIVES_NOTIFY_GAUGE) ) {
                        hud_maybe_display_objective_message();
                }

                if ( hud_gauge_active(HUD_WINGMEN_STATUS) ) {
                        hud_wingman_status_render();
                }

                if ( hud_gauge_active(HUD_KILLS_GAUGE) ) {
                        show_gauge_flag=1;
                        // is gauge configured as a popup?
                        if ( hud_gauge_is_popup(HUD_KILLS_GAUGE) ) {
                                if ( !hud_gauge_popup_active(HUD_KILLS_GAUGE) ) {
                                        show_gauge_flag=0;
                                }
                        }
                        
                        if ( show_gauge_flag ) {
                                hud_show_kills_gauge();
                        }
                }

                // show the player shields
                if ( hud_gauge_active(HUD_PLAYER_SHIELD_ICON) ) {
                        hud_shield_show(Player_obj);
                }

                // show the directives popup and/or training popup
                message_training_display();

                // if this is a multiplayer game, blit any icons/bitmaps indicating voice recording or playback
                if(Game_mode & GM_MULTIPLAYER){
                        hud_show_voice_status();
                }
        }

        hud_show_messages();

        // maybe render any necessary multiplayer text messaging strings being entered
        hud_maybe_render_multi_text();

        // show red alert notify gauge when moving to red alert
        hud_maybe_display_red_alert();  

        // display supernova warning
        hud_maybe_display_supernova();

        // check to see if we are in messaging mode.  If so, send the key to the code
        // to deal with the message.  hud_sqaudmsg_do_frame will return 0 if the key
        // wasn't used in messaging mode, otherwise 1.  In the event the key was used,
        // return immediately out of this function.
        if ( Players->flags & PLAYER_FLAGS_MSG_MODE ) {
                if ( hud_squadmsg_do_frame() ){
                        return;
                }
        }

        hud_render_multi_ping();        
}


// hud_stop_looped_engine_sounds()
//
// This function will set the loop id's for the engine noises to -1, this will force any
// looping engine sounds to stop.  This should only be called when the game decides to
// stop all looping sounds
//

void hud_stop_looped_engine_sounds()
{
        if ( Player_engine_snd_loop > -1 )      {
                snd_stop(Player_engine_snd_loop);
                //snd_chg_loop_status(Player_engine_snd_loop, 0);
                Player_engine_snd_loop = -1;
        }
}

#define ZERO_PERCENT                    0.01f
#define ENGINE_MAX_VOL          1.0f
#define ENGINE_MAX_PITCH        44100

void update_throttle_sound()
{
        // determine what engine sound to play
        float percent_throttle;
//      int     throttle_pitch;

        // if we're a multiplayer observer, stop any engine sounds from playing and return
        if((Game_mode & GM_MULTIPLAYER) && (Net_player->flags & NETINFO_FLAG_OBSERVER)){
                // stop engine sound if it is playing
                if(Player_engine_snd_loop != -1){
                        snd_stop(Player_engine_snd_loop);
                        Player_engine_snd_loop = -1;
                }

                // return
                return;
        }

        if ( timestamp_elapsed(throttle_sound_check_id) ) {

                throttle_sound_check_id = timestamp(THROTTLE_SOUND_CHECK_INTERVAL);
        
                if ( Ships[Player_obj->instance].current_max_speed == 0 ) {
                        percent_throttle = Player_obj->phys_info.fspeed / Ship_info[Ships[Player_obj->instance].ship_info_index].max_speed;
                } else {
                        percent_throttle = Player_obj->phys_info.fspeed / Ships[Player_obj->instance].current_max_speed;
                }

                // If the throttle has changed, modify the sound
                if ( percent_throttle != last_percent_throttle || Player_engine_snd_loop == -1 ) {

                        if ( percent_throttle < ZERO_PERCENT ) {
                                if ( Player_engine_snd_loop > -1 )      {
                                        snd_chg_loop_status(Player_engine_snd_loop, 0);
                                        Player_engine_snd_loop = -1;
                                }
                        }
                        else {
                                if ( Player_engine_snd_loop == -1 ){
                                        Player_engine_snd_loop = snd_play_looping( &Snds[SND_ENGINE], 0.0f , -1, -1, percent_throttle * ENGINE_MAX_VOL );
                                } else {
                                        // The sound may have been trashed at the low-level if sound channel overflow.
                                        // TODO: implement system where certain sounds cannot be interrupted (priority?)
                                        if ( snd_is_playing(Player_engine_snd_loop) ) {
                                                snd_set_volume(Player_engine_snd_loop, percent_throttle * ENGINE_MAX_VOL);
                                        }
                                        else {
                                                Player_engine_snd_loop = -1;
                                        }
                                }
                        }

//                      throttle_pitch = snd_get_pitch(Player_engine_snd_loop);
//                      if ( percent_throttle > 0.5 ) {
//                              snd_set_pitch(Player_engine_snd_loop, fl2i(22050 + (percent_throttle-0.5f)*1000));
//                      }

                }       // end if (percent_throttle != last_percent_throttle)

                last_percent_throttle = percent_throttle;

        }       // end if ( timestamp_elapsed(throttle_sound_check_id) )
}

// called at the beginning of each level.  Loads frame data in once, and initializes any damage
// gauge specific data
void hud_damage_popup_init()
{
        int i;

        if ( !Damage_gauges_loaded ) {
                for ( i = 0; i < NUM_DAMAGE_GAUGES; i++ ) {
                        Damage_gauges[i].first_frame = bm_load_animation(Damage_gauge_fnames[gr_screen.res][i], &Damage_gauges[i].num_frames);
                        if ( Damage_gauges[i].first_frame == -1 ) {
                                Warning(LOCATION, "Could not load in the ani: %s\n", Damage_gauge_fnames[gr_screen.res][i]);
                                return;
                        }
                }
                Damage_gauges_loaded = 1;
        }

        Damage_flash_bright = 0;
        Damage_flash_timer =    1;

        for ( i = 0; i < SUBSYSTEM_MAX; i++ ) {
                Pl_hud_subsys_info[i].last_str = 1000.0f;
                Pl_hud_subsys_info[i].flash_duration_timestamp = 1;
                Pl_hud_next_flash_timestamp = 1;
                Pl_hud_is_bright = 0;
        }
}

// ---------------------------------------------------------
// show player damage status via a popup window

void hud_show_damage_popup()
{
        model_subsystem *psub;
        ship_subsys                     *pss;
        ship_info                       *sip;
        int                                     sx, sy, bx, by, w, h, screen_integrity, num, best_str, best_index;
        float                                   strength, shield, integrity;
        char                                    buf[128];
        hud_subsys_damage       hud_subsys_list[SUBSYSTEM_MAX]; 

        if ( Damage_gauges[0].first_frame == -1 ) {
                return;
        }

        if ( (The_mission.game_type & MISSION_TYPE_TRAINING) && Training_msg_visible ){
                return;
        }
                
        sip = &Ship_info[Player_ship->ship_info_index];
        hud_get_target_strength(Player_obj, &shield, &integrity);
        screen_integrity = fl2i(integrity*100);

        if ( hud_gauge_is_popup(HUD_DAMAGE_GAUGE) ) {
                if ( screen_integrity >= 100 ) {
                        return;
                }
        }

        if ( timestamp_elapsed(Damage_flash_timer) ) {
                Damage_flash_timer = timestamp(DAMAGE_FLASH_TIME);
                Damage_flash_bright ^= 1;
        }

        hud_set_gauge_color(HUD_DAMAGE_GAUGE);

        // draw the top of the damage pop-up
        GR_AABITMAP(Damage_gauges[0].first_frame, Damage_gauge_coords[gr_screen.res][0][0], Damage_gauge_coords[gr_screen.res][0][1]);  
        gr_string(Damage_text_coords[gr_screen.res][0], Damage_text_coords[gr_screen.res][1], XSTR( "damage", 218));

        // show hull integrity
        if ( screen_integrity < 100 ) {         
                if ( screen_integrity == 0 ) {
                        screen_integrity = 1;
                }
                sprintf(buf, XSTR( "%d%%", 219), screen_integrity);
                hud_num_make_mono(buf);
                gr_get_string_size(&w, &h, buf);
                if ( screen_integrity < 30 ) {
                        gr_set_color_fast(&Color_red);
                }
                gr_string(Hull_integ_coords[gr_screen.res][0], Hull_integ_coords[gr_screen.res][1], XSTR( "Hull Integrity", 220));
                gr_string(Hull_integ_val_coords[gr_screen.res][0] - w, Hull_integ_val_coords[gr_screen.res][1], buf);
        } 

        // show damaged subsystems
        sx = Damage_subsys_text_coords[gr_screen.res][0];
        sy = Damage_subsys_text_coords[gr_screen.res][1];
        bx = Damage_gauge_coords[gr_screen.res][1][0];
        by = Damage_gauge_coords[gr_screen.res][1][1];

        num = 0;
        for ( pss = GET_FIRST(&Player_ship->subsys_list); pss !=END_OF_LIST(&Player_ship->subsys_list); pss = GET_NEXT(pss) ) {
                psub = pss->system_info;
                strength = ship_get_subsystem_strength(Player_ship, psub->type);
                if ( strength < 1 ) {
                        screen_integrity = fl2i(strength*100);
                        if ( screen_integrity == 0 ) {
                                if ( strength > 0 ) {
                                        screen_integrity = 1;
                                }
                        }
                        hud_subsys_list[num].name = psub->name;
                        hud_subsys_list[num].str  = screen_integrity;
                        hud_subsys_list[num].type = psub->type;
                        num++;

                        if ( strength < Pl_hud_subsys_info[psub->type].last_str ) {
                                Pl_hud_subsys_info[psub->type].flash_duration_timestamp = timestamp(SUBSYS_DAMAGE_FLASH_DURATION);
                        }
                        Pl_hud_subsys_info[psub->type].last_str = strength;
                }
        }

        int type;
        for ( int i = 0; i < num; i++ ) {
                best_str = 1000;
                best_index = -1;
                for ( int j = 0; j < num-i; j++ ) {
                        if ( hud_subsys_list[j].str < best_str ) {
                                best_str = hud_subsys_list[j].str;
                                best_index = j;
                        }
                }

                Assert(best_index >= 0);
                Assert(best_str >= 0);

                // display strongest subsystem left in list
                // draw the bitmap
                // hud_set_default_color();
                hud_set_gauge_color(HUD_DAMAGE_GAUGE);

                GR_AABITMAP(Damage_gauges[1].first_frame, bx, by);
                by += Damage_gauge_line_h[gr_screen.res];

                type = hud_subsys_list[best_index].type;
                if ( !timestamp_elapsed( Pl_hud_subsys_info[type].flash_duration_timestamp ) ) {
                        if ( timestamp_elapsed( Pl_hud_next_flash_timestamp ) ) {
                                Pl_hud_is_bright ^= 1;
                                Pl_hud_next_flash_timestamp = timestamp(SUBSYS_DAMAGE_FLASH_INTERVAL);
                        }
                        
                        if ( Pl_hud_is_bright ) {
                                int alpha_color;
                                alpha_color = min(HUD_COLOR_ALPHA_MAX,HUD_color_alpha+HUD_BRIGHT_DELTA);
                                // gr_set_color_fast(&HUD_color_defaults[alpha_color]);

                                hud_set_gauge_color(HUD_DAMAGE_GAUGE, alpha_color);
                        } else {                                
                                hud_set_gauge_color(HUD_DAMAGE_GAUGE);
                        }
                }

                // draw the text
                if ( best_str < 30 ) {
                        if ( best_str <= 0 ) {
                                if ( Damage_flash_bright ) {
                                        gr_set_color_fast(&Color_bright_red);
                                } else {
                                        gr_set_color_fast(&Color_red);
                                }

                        } else {
                                gr_set_color_fast(&Color_red);
                        }
                } else {
                        hud_set_gauge_color(HUD_DAMAGE_GAUGE);
                }               

                gr_string(sx, sy, hud_targetbox_truncate_subsys_name(hud_subsys_list[best_index].name));
                sprintf(buf, XSTR( "%d%%", 219), best_str);
                hud_num_make_mono(buf);
                gr_get_string_size(&w, &h, buf);
                gr_string(Hull_integ_val_coords[gr_screen.res][0] - w, sy, buf);
                sy += Damage_gauge_line_h[gr_screen.res];

                // remove it from hud_subsys_list
                if ( best_index < (num-i-1) ) {
                        hud_subsys_list[best_index] = hud_subsys_list[num-i-1];
                }
        }

        // draw the bottom of the gauge
        // hud_set_default_color();
        hud_set_gauge_color(HUD_DAMAGE_GAUGE);

        GR_AABITMAP(Damage_gauges[2].first_frame, bx, by);              
}

// init the members of the hud_anim struct to default values
void hud_anim_init(hud_anim *ha, int sx, int sy, char *filename)
{
        ha->first_frame = -1;
        ha->num_frames          = 0;
        ha->total_time          = 0.0f;
        ha->time_elapsed        = 0.0f;
        ha->sx                          = sx;
        ha->sy                          = sy;
        strcpy(ha->name, filename);
}

// call to unload the targetbox static animation
void hud_anim_release(hud_anim *ha)
{
        int i;
        for ( i = 0; i < ha->num_frames; i++ ) {
                bm_unload(ha->first_frame + i);
        }
}

// load a hud_anim
// return 0 is successful, otherwise return -1
int hud_anim_load(hud_anim *ha)
{
        int             fps;

        ha->first_frame = bm_load_animation(ha->name, &ha->num_frames, &fps);
        if ( ha->first_frame == -1 ) {
                Int3(); // couldn't load animation file in
                return -1;
        }
        Assert(fps != 0);
        ha->total_time = i2fl(ha->num_frames)/fps;
        return 0;
}

// render out a frame of the targetbox static animation, based on how much time has
// elapsed
// input:       ha                              =>      pointer to hud anim info
//                              frametime       =>      seconds elapsed since last frame
//                              draw_alpha      =>      draw bitmap as alpha-bitmap (default 0)
//                              loop                    =>      anim should loop (default 1)
//                              hold_last       =>      should last frame be held (default 0)
//                              reverse         =>      play animation in reverse (default 0)
int hud_anim_render(hud_anim *ha, float frametime, int draw_alpha, int loop, int hold_last, int reverse)
{
        int framenum;

        if ( ha->num_frames <= 0 ) {
                if ( hud_anim_load(ha) == -1 )
                        return 0;
        }

        ha->time_elapsed += frametime;
        if ( ha->time_elapsed > ha->total_time ) {
                if ( loop ) {
                        ha->time_elapsed = 0.0f;
                } else {
                        if ( !hold_last ) {
                                return 0;
                        }
                }
        }

        // draw the correct frame of animation
        framenum = fl2i( (ha->time_elapsed * ha->num_frames) / ha->total_time );
        if (reverse) {
                framenum = (ha->num_frames-1) - framenum;
        }

        if ( framenum < 0 )
                framenum = 0;
        if ( framenum >= ha->num_frames )
                framenum = ha->num_frames-1;

        // Blit the bitmap for this frame
        if(emp_should_blit_gauge()){
                gr_set_bitmap(ha->first_frame + framenum);
                if ( draw_alpha ){
                        gr_aabitmap(ha->sx, ha->sy);
                } else {
                        gr_bitmap(ha->sx, ha->sy);
                }
        }

        return 1;
}

// convert a number string to use mono-spaced 1 character
void hud_num_make_mono(char *num_str)
{
        int len, i, sc;
        len = strlen(num_str);

        sc = Lcl_special_chars;
        for ( i = 0; i < len; i++ ) {
                if ( num_str[i] == '1' ) {
                        num_str[i] = (char)(sc + 1);
                }
        }
}

// flashing text gauge
void hud_init_text_flash_gauge()
{       
}

void hud_start_text_flash(char *txt, int t)
{
        // bogus
        if(txt == NULL){
                strcpy(Hud_text_flash, "");
                return;
        }

        // HACK. don't override EMP if its still going    :)
        if(!strcmp(Hud_text_flash, NOX("Emp")) && !hud_targetbox_flash_expired(TBOX_FLASH_CMEASURE)){
                return;
        }

        strncpy(Hud_text_flash, txt, 500);
        hud_targetbox_start_flash(TBOX_FLASH_CMEASURE, t);      
}

void hud_maybe_show_text_flash_icon()
{               
        int bright;

        if ( hud_targetbox_flash_expired(TBOX_FLASH_CMEASURE) ) {
                return;
        }

        hud_targetbox_maybe_flash(TBOX_FLASH_CMEASURE);         

        // bright?
        bright = hud_targetbox_is_bright(TBOX_FLASH_CMEASURE);

        // draw
        hud_show_text_flash_icon(Hud_text_flash, Hud_text_flash_coords[gr_screen.res][1], bright);
}

void hud_show_text_flash_icon(char *txt, int y, int bright)
{
        int w, h;

        // different font size in hi-res
        if(gr_screen.res != GR_640){
                gr_set_font(FONT3);
        }

        // set color
        if(bright){
                hud_set_gauge_color(HUD_TEXT_FLASH, HUD_C_DIM);
        } else {
                gr_set_color_fast(&Color_black);
        }

        // string size
        gr_get_string_size(&w, &h, txt);

        // draw the box 
        gr_rect( (int)((((float)gr_screen.max_w / 2.0f) - ((float)w / 2.0f)) - 1.0f), (int)((float)y - 1.0f), w + 2, h + 1);

        // string
        hud_set_gauge_color(HUD_TEXT_FLASH, HUD_C_BRIGHT);      
        gr_string(0x8000, y, txt);

        // go back to normal font
        gr_set_font(FONT1);
}

// maybe display the kills gauge on the HUD
void hud_show_kills_gauge()
{
        if ( Kills_gauge.first_frame < 0 ) {
                return;
        }

        // hud_set_default_color();
        hud_set_gauge_color(HUD_KILLS_GAUGE);

        // draw background
        GR_AABITMAP(Kills_gauge.first_frame, Kills_gauge_coords[gr_screen.res][0], Kills_gauge_coords[gr_screen.res][1]);       

        gr_string(Kills_text_coords[gr_screen.res][0], Kills_text_coords[gr_screen.res][1], XSTR( "kills:", 223));

        // display how many kills the player has so far
        char    num_kills_string[32];
        int     w,h;

        if ( !Player ) {
                Int3();
                return;
        }

        sprintf(num_kills_string, "%d", Player->stats.m_kill_count_ok);

        gr_get_string_size(&w, &h, num_kills_string);
        gr_string(Kills_text_val_coords[gr_screen.res][0]-w, Kills_text_val_coords[gr_screen.res][1], num_kills_string);
}

// maybe show the netlag icon on the hud
void hud_maybe_show_netlag_icon()
{
        int lag_status;

        if ( Netlag_icon.first_frame == -1 ) {
                Int3();
                return;
        }

        lag_status = multi_query_lag_status();  

        switch(lag_status) {
        case 0:
                // draw the net lag icon flashing
                hud_targetbox_start_flash(TBOX_FLASH_NETLAG);
                if(hud_targetbox_maybe_flash(TBOX_FLASH_NETLAG)){
                        hud_set_gauge_color(HUD_LAG_GAUGE, HUD_C_BRIGHT);
                } else {
                        hud_set_gauge_color(HUD_LAG_GAUGE);
                }
                gr_set_bitmap(Netlag_icon.first_frame);
                break;
        case 1:
                // draw the disconnected icon flashing fast
                if(hud_targetbox_maybe_flash(TBOX_FLASH_NETLAG,1)){
                        hud_set_gauge_color(HUD_LAG_GAUGE, HUD_C_BRIGHT);
                } else {
                        hud_set_gauge_color(HUD_LAG_GAUGE);
                }
                gr_set_bitmap(Netlag_icon.first_frame+1);
                break;
        default:
                // nothing to draw
                return;
        }
        
        if(emp_should_blit_gauge()){
                gr_aabitmap(Netlag_coords[gr_screen.res][0], Netlag_coords[gr_screen.res][1]);
        }
}

// load in kills gauge if required
void hud_init_kills_gauge()
{
        if ( !Kills_gauge_loaded ) {
                Kills_gauge.first_frame = bm_load_animation(Kills_fname[gr_screen.res], &Kills_gauge.num_frames);
                if ( Kills_gauge.first_frame == -1 ) {
                        Warning(LOCATION, "Could not load in the kills ani: Kills_fname[gr_screen.res]\n");
                        return;
                }
                Kills_gauge_loaded = 1;
        }
}

// load in netlag icon if required
void hud_init_netlag_icon()
{
        if ( !Netlag_icon_loaded ) {
                Netlag_icon.first_frame = bm_load_animation(Netlag_fname[gr_screen.res], &Netlag_icon.num_frames);
                if ( Netlag_icon.first_frame == -1 ) {
                        Warning(LOCATION, "Could not load in the netlag ani: Netlag_fname[gr_screen.res]\n");
                        return;
                }
                Netlag_icon_loaded = 1;
        }
}

// called at mission start to init data, and load support view bitmap if required
void hud_support_view_init()
{
        Hud_support_view_fade = 1;
        Hud_support_obj_sig = -1;
        Hud_support_target_sig = -1;
        Hud_support_objnum = -1;
        Hud_support_view_active = 0;
        Hud_support_view_abort = 0;

        // ensure the talking head border is loaded
        if ( !Support_view_gauge_loaded ) {
                Support_view_gauge.first_frame = bm_load_animation(Support_fname[gr_screen.res], &Support_view_gauge.num_frames);
                if ( Support_view_gauge.first_frame == -1 ) {
                        Warning(LOCATION, "Could not load in ani: Support_fname[gr_screen.res]\n");
                }
                Support_view_gauge_loaded = 1;
        }
}

// start displaying the support view pop-up.  This will remain up until hud_support_view_stop is called.
// input:       objnum  =>              object number for the support ship
void hud_support_view_start()
{
        Hud_support_view_active = 1;
        Hud_support_view_fade = 1;
}

// stop displaying the support view pop-up
void hud_support_view_stop(int stop_now)
{
        if ( stop_now ) {
                Hud_support_view_active = 0;
                Hud_support_view_fade = 1;
                Hud_support_view_abort = 0;
        } else {
                Hud_support_view_fade = timestamp(2000);
        }

        Hud_support_obj_sig = -1;
        Hud_support_target_sig = -1;
        Hud_support_objnum = -1;
}

void hud_support_view_abort()
{
        hud_support_view_stop(0);
        Hud_support_view_abort = 1;
}

// return the number of seconds until repair ship will dock with player, return -1 if error
// 
// mwa made this function more general purpose
//
// NOTE: This function is pretty stupid now.  It just assumes the player is sitting still, and
//                 the support ship is moving directly to the player.
int hud_support_get_dock_time( int objnum )
{
        ai_info *aip;
        object  *support_objp, *other_objp;
        float           dist, rel_speed, support_speed;
        vector  rel_vel;

        support_objp = &Objects[objnum];
        aip = &Ai_info[Ships[support_objp->instance].ai_index];

        // if the ship is docked, return 0
        if ( aip->ai_flags & AIF_DOCKED )
                return 0;

        // get the dockee object pointer
        if (aip->goal_objnum == -1) {
                Int3(); //      Shouldn't happen, but let's recover gracefully.
                return 0;
        }

        other_objp = &Objects[aip->goal_objnum];

        vm_vec_sub(&rel_vel, &support_objp->phys_info.vel, &other_objp->phys_info.vel);
        rel_speed = vm_vec_mag_quick(&rel_vel);

        dist = vm_vec_dist_quick(&other_objp->pos, &support_objp->pos);

        support_speed = support_objp->phys_info.speed;

        if ( rel_speed <= support_speed/2.0f) { //      This means the player is moving away fast from the support ship.
                return (int) (dist/support_speed);
        } else {
                float   d1;
                float   d = dist;
                float   time = 0.0f;
                
                if (rel_speed < 20.0f)
                        rel_speed = 20.0f;

                //      When faraway, use max speed, not current speed.  Might not have sped up yet.
                if (d > 100.0f) {
                        time += (d - 100.0f)/support_objp->phys_info.max_vel.xyz.z;
                }

                //      For mid-range, use current speed.
                if (d > 60.0f) {
                        d1 = min(d, 100.0f);

                        time += (d1 - 60.0f)/rel_speed;
                }

                //      For nearby, ship will have to slow down a bit for docking maneuver.
                if (d > 30.0f) {
                        d1 = min(d, 60.0f);

                        time += (d1 - 30.0f)/5.0f;
                }

                //      For very nearby, ship moves quite slowly.
                d1 = min(d, 30.0f);
                time += d1/7.5f;

                return fl2i(time);
        }
}

// Locate the closest support ship which is trying to dock with player, return -1 if there is no support
// ship currently trying to dock with the player
// MA:  4/22/98 -- pass in objp to find support ship trying to dock with objp
int hud_support_find_closest( int objnum )
{
        ship_obj                *sop;
        ai_info         *aip;
        object          *objp;
        int i;

        objp = &Objects[objnum];

        sop = GET_FIRST(&Ship_obj_list);
        while(sop != END_OF_LIST(&Ship_obj_list)){
                if ( Ship_info[Ships[Objects[sop->objnum].instance].ship_info_index].flags & SIF_SUPPORT ) {
                        int pship_index, sindex;

                        // make sure support ship is not dying
                        if ( !(Ships[Objects[sop->objnum].instance].flags & (SF_DYING|SF_EXPLODED)) ) {

                                Assert( objp->type == OBJ_SHIP );
                                aip = &Ai_info[Ships[Objects[sop->objnum].instance].ai_index];
                                pship_index = objp->instance;

                                // we must check all goals for this support ship -- not just the first one
                                for ( i = 0; i < MAX_AI_GOALS; i++ ) {

                                        // we can use == in the next statement (and should) since a ship will only ever be
                                        // following one order at a time.
                                        if ( aip->goals[i].ai_mode == AI_GOAL_REARM_REPAIR ) {
                                                Assert( aip->goals[i].ship_name );
                                                sindex = ship_name_lookup( aip->goals[i].ship_name );
                                                if ( sindex == pship_index )
                                                        return sop->objnum;
                                        }
                                }
                        }
                }
                sop = GET_NEXT(sop);
        }

        return -1;
}

// dipaly the hud_support view popup
void hud_support_view_blit()
{
        int     show_time;
        char    outstr[64];
        
        if ( !Hud_support_view_active ) {
                return;
        }

        // don't render this gauge for multiplayer observers
        if((Game_mode & GM_MULTIPLAYER) && ((Net_player->flags & NETINFO_FLAG_OBSERVER) || (Player_obj->type == OBJ_OBSERVER))){
                return;
        }

        // If we haven't determined yet who the rearm ship is, try to!
        if (Hud_support_objnum == -1) {
                Hud_support_objnum = hud_support_find_closest( OBJ_INDEX(Player_obj) );
                if ( Hud_support_objnum >= 0 ) {
                        Hud_support_obj_sig = Objects[Hud_support_objnum].signature;
                        Hud_support_target_sig = Player_obj->signature;
                }
        } else {
                // check to see if support ship is still alive
                if ( (Objects[Hud_support_objnum].signature != Hud_support_obj_sig) || (Hud_support_target_sig != Player_obj->signature) ) {
                        hud_support_view_stop(1);
                        return;
                }
        }

        // set hud color
        hud_set_gauge_color(HUD_SUPPORT_GAUGE);

        GR_AABITMAP(Support_view_gauge.first_frame, Support_view_coords[gr_screen.res][0], Support_view_coords[gr_screen.res][1]);      

        gr_string(Support_text_coords[gr_screen.res][0], Support_text_coords[gr_screen.res][1], XSTR( "support", 224));

        if ( Hud_support_view_fade > 1 ) {
                if ( !timestamp_elapsed(Hud_support_view_fade) ) {
                        if ( Hud_support_view_abort){
                                gr_string(0x8000, Support_text_val_coords[gr_screen.res][1], XSTR( "aborted", 225));
                        } else {
                                gr_string(0x8000, Support_text_val_coords[gr_screen.res][1], XSTR( "complete", 1407));
                        }
                        return;
                } else {
                        Hud_support_view_abort = 0;
                        Hud_support_view_active = 0;
                        Hud_support_view_fade = 1;
                        Hud_support_objnum = -1;
                        return;
                }
        }

        show_time = 0;
        if ( Player_ai->ai_flags & AIF_BEING_REPAIRED ) {
                Assert(Ship_info[Player_ship->ship_info_index].initial_hull_strength > 0);
                if (  (ship_get_subsystem_strength(Player_ship, SUBSYSTEM_ENGINE) < 1.0 ) ||
                                (ship_get_subsystem_strength(Player_ship, SUBSYSTEM_SENSORS) < 1.0 ) ||
                                (ship_get_subsystem_strength(Player_ship, SUBSYSTEM_WEAPONS) < 1.0 ) ||
                                (ship_get_subsystem_strength(Player_ship, SUBSYSTEM_COMMUNICATION) < 1.0 ) ) {
                        sprintf(outstr, XSTR( "repairing", 227));
                } else {
                        sprintf(outstr, XSTR( "rearming", 228));
                }
                gr_string(0x8000, Support_text_val_coords[gr_screen.res][1], outstr);
        } else if (Player_ai->ai_flags & AIF_REPAIR_OBSTRUCTED) {
                sprintf(outstr, XSTR( "obstructed", 229));
                gr_string(0x8000, Support_text_val_coords[gr_screen.res][1], outstr);
        } else {
                if ( Hud_support_objnum == -1 ) {
                        sprintf(outstr, XSTR( "warping in", 230));
                        gr_string(0x8000, Support_text_val_coords[gr_screen.res][1], outstr);
                } else {
                        ai_info *aip;

                        // display "busy" when support ship isn't actually enroute to me
                        aip = &Ai_info[Ships[Objects[Hud_support_objnum].instance].ai_index];
                        if ( aip->goal_objnum != OBJ_INDEX(Player_obj) ) {
                                sprintf(outstr, XSTR( "busy", 231));
                                show_time = 0;

                        } else {
                                sprintf(outstr, XSTR( "dock in:", 232));
                                show_time = 1;
                        }               

                        if (!show_time) {
                                gr_string(Support_text_dock_coords[gr_screen.res][0], Support_text_val_coords[gr_screen.res][1], outstr);
                        } else {                        
                                gr_string(Support_text_dock_coords[gr_screen.res][0], Support_text_val_coords[gr_screen.res][1], outstr);
                        }
                }
        }

        if ( show_time ) {
                int seconds, minutes;

                Assert( Hud_support_objnum != -1 );

                // ensure support ship is still alive
                if ( (Objects[Hud_support_objnum].signature != Hud_support_obj_sig) || (Hud_support_target_sig != Player_obj->signature) ) {
                        hud_support_view_stop(1);
                        seconds = 0;
                } else {
                        seconds = hud_support_get_dock_time( Hud_support_objnum );
                }

                if ( seconds >= 0 ) {
                        minutes = seconds/60;
                        seconds = seconds%60;
                        if ( minutes > 99 ) {
                                minutes = 99;
                                seconds = 99;
                        }
                } else {
                        minutes = 99;
                        seconds = 99;
                }
                gr_printf(Support_text_dock_val_coords[gr_screen.res][0], Support_text_val_coords[gr_screen.res][1], NOX("%02d:%02d"), minutes, seconds);
        }
}

// Set the current color to the default HUD color (with default alpha)
void hud_set_default_color()
{
        Assert(HUD_color_alpha >= 0 && HUD_color_alpha < HUD_NUM_COLOR_LEVELS);
        gr_set_color_fast(&HUD_color_defaults[HUD_color_alpha]);
}

// Set the current color to a bright HUD color (ie high alpha)
void hud_set_bright_color()
{
        int alpha_color;
        alpha_color = min(HUD_COLOR_ALPHA_MAX,HUD_color_alpha+HUD_BRIGHT_DELTA);
        gr_set_color_fast(&HUD_color_defaults[alpha_color]);
}

// Set the current color to a dim HUD color (ie low alpha)
void hud_set_dim_color()
{
        if ( HUD_color_alpha > 2 ) {
                gr_set_color_fast(&HUD_color_defaults[2]);
        }
}

// hud_set_iff_color() will set the color to the IFF color based on the team
//
// input:       team                    =>              team to base color on
//                              is_bright       =>              default parameter (value 0) which uses bright version of IFF color
void hud_set_iff_color(object *objp, int is_bright)
{
        // AL 12-26-97: it seems IFF color needs to be set relative to the player team.  If
        //                                              the team in question is the same as the player, then it should be 
        //                                              drawn friendly.  If the team is different than the players, then draw the
        //                                              appropriate IFF.          
        int team;
        team = obj_team(objp);

        if ( ship_is_tagged(objp) ) {
                gr_set_color_fast(&IFF_colors[IFF_COLOR_TAGGED][is_bright]);
        } else if ( (team == Player_ship->team) && (Player_ship->team != TEAM_TRAITOR) ) {
                gr_set_color_fast(&IFF_colors[IFF_COLOR_FRIENDLY][is_bright]);
        } else {
                switch (team) {
                case TEAM_NEUTRAL:
                        gr_set_color_fast(&IFF_colors[IFF_COLOR_NEUTRAL][is_bright]);
                        break;
                case TEAM_UNKNOWN:
                        gr_set_color_fast(&IFF_colors[IFF_COLOR_UNKNOWN][is_bright]);
                        break;
                case TEAM_HOSTILE:
                case TEAM_FRIENDLY:
                case TEAM_TRAITOR:
                        gr_set_color_fast(&IFF_colors[IFF_COLOR_HOSTILE][is_bright]);
                        break;
                default:
                        Int3();
                        gr_set_color_fast(&IFF_colors[IFF_COLOR_UNKNOWN][is_bright]);
                        break;
                }
        }
}

// Determine if ship team should be ignored, based on
// team filter
// input:       team_filter     =>      team mask used to select friendly or hostile ships
//                              ship_team       =>      team of the ship in question
// exit:                1                               =>      ship_team matches filter from player perspective
//                              0                               =>      ship_team does match team filter
int hud_team_matches_filter(int team_filter, int ship_team)
{
        return team_filter & ship_team;
}


// reset gauge flashing data
void hud_gauge_flash_init()
{
        int i;
        for ( i=0; i<NUM_HUD_GAUGES; i++ ) {
                HUD_gauge_flash_duration[i]=timestamp(0);
                HUD_gauge_flash_next[i]=timestamp(0);
        }
        HUD_gauge_bright=0;
}

#define NUM_VM_OTHER_SHIP_GAUGES 5
static int Vm_other_ship_gauges[NUM_VM_OTHER_SHIP_GAUGES] = 
{
        HUD_CENTER_RETICLE,
        HUD_TARGET_MONITOR,
        HUD_TARGET_MONITOR_EXTRA_DATA,
        HUD_MESSAGE_LINES,
        HUD_TALKING_HEAD
};

// determine if the specified HUD gauge should be displayed
int hud_gauge_active(int gauge_index)
{
        Assert(gauge_index >=0 && gauge_index < NUM_HUD_GAUGES);

        // AL: Special code: Only show two gauges when not viewing from own ship
        if ( Viewer_mode & VM_OTHER_SHIP ) {
                for ( int i = 0; i < NUM_VM_OTHER_SHIP_GAUGES; i++ ) {
                        if ( gauge_index == Vm_other_ship_gauges[i] ) {
                                return 1;
                        }
                }
                return 0;
        }

        return hud_config_show_flag_is_set(gauge_index);
}

// determine if gauge is in pop-up mode or not
int hud_gauge_is_popup(int gauge_index)
{
        Assert(gauge_index >=0 && gauge_index < NUM_HUD_GAUGES);
        return hud_config_popup_flag_is_set(gauge_index);
}

// determine if a popup gauge should be drawn
int hud_gauge_popup_active(int gauge_index)
{
        Assert(gauge_index >=0 && gauge_index < NUM_HUD_GAUGES);
        if ( !hud_gauge_is_popup(gauge_index) ) {
                return 0;
        }

        if ( !timestamp_elapsed(HUD_popup_timers[gauge_index]) ) {
                return 1;
        } else {
                return 0;
        }
}

// start a gauge to popup
void hud_gauge_popup_start(int gauge_index, int time) 
{
        Assert(gauge_index >=0 && gauge_index < NUM_HUD_GAUGES);
        if ( !hud_gauge_is_popup(gauge_index) ) {
                return;
        }

        HUD_popup_timers[gauge_index] = timestamp(time);

}

// call HUD function to flash gauge
void hud_gauge_start_flash(int gauge_index)
{
        Assert(gauge_index >=0 && gauge_index < NUM_HUD_GAUGES);
        HUD_gauge_flash_duration[gauge_index] = timestamp(HUD_GAUGE_FLASH_DURATION);
        HUD_gauge_flash_next[gauge_index] = 1;
}

// Set the HUD color for the gauge, based on whether it is flashing or not
void hud_set_gauge_color(int gauge_index, int bright_index)
{
        color use_color;
        int flash_status = hud_gauge_maybe_flash(gauge_index);
        use_color = HUD_config.clr[gauge_index];
        int alpha;

        // if we're drawing it as bright
        if(bright_index != HUD_C_NONE){
                switch(bright_index){
                case HUD_C_DIM:
                        alpha = HUD_contrast ? HUD_NEW_ALPHA_DIM_HI : HUD_NEW_ALPHA_DIM;
                        gr_init_alphacolor(&use_color, use_color.red, use_color.green, use_color.blue, alpha);
                        break;

                case HUD_C_NORMAL:
                        alpha = HUD_contrast ? HUD_NEW_ALPHA_NORMAL_HI : HUD_NEW_ALPHA_NORMAL;
                        gr_init_alphacolor(&use_color, use_color.red, use_color.green, use_color.blue, alpha);
                        break;

                case HUD_C_BRIGHT:
                        alpha = HUD_contrast ? HUD_NEW_ALPHA_BRIGHT_HI : HUD_NEW_ALPHA_BRIGHT;
                        gr_init_alphacolor(&use_color, use_color.red, use_color.green, use_color.blue, alpha);
                        break;

                // intensity
                default: 
                        Assert((bright_index >= 0) && (bright_index < HUD_NUM_COLOR_LEVELS));
                        if(bright_index < 0){
                                bright_index = 0;
                        }
                        if(bright_index >= HUD_NUM_COLOR_LEVELS){
                                bright_index = HUD_NUM_COLOR_LEVELS - 1;
                        }

                        // alpha = 255 - (255 / (bright_index + 1));
                        // alpha = (int)((float)alpha * 1.5f);
                        int level = 255 / (HUD_NUM_COLOR_LEVELS);
                        alpha = level * bright_index;
                        if(alpha > 255){
                                alpha = 255;
                        }
                        if(alpha < 0){
                                alpha = 0;
                        }
                        gr_init_alphacolor(&use_color, use_color.red, use_color.green, use_color.blue, alpha);
                        break;
                }
        } else {
                switch(flash_status) {
                case 0:
                        alpha = HUD_contrast ? HUD_NEW_ALPHA_DIM_HI : HUD_NEW_ALPHA_DIM;
                        gr_init_alphacolor(&use_color, use_color.red, use_color.green, use_color.blue, alpha);
                        break;
                case 1:                 
                        alpha = HUD_contrast ? HUD_NEW_ALPHA_BRIGHT_HI : HUD_NEW_ALPHA_BRIGHT;
                        gr_init_alphacolor(&use_color, use_color.red, use_color.green, use_color.blue, alpha);
                        break;
                default:                        
                        alpha = HUD_contrast ? HUD_NEW_ALPHA_NORMAL_HI : HUD_NEW_ALPHA_NORMAL;  
                        gr_init_alphacolor(&use_color, use_color.red, use_color.green, use_color.blue, alpha);
                        break;
                }
        }

        gr_set_color_fast(&use_color);  
}

// set the color for a gauge that may be flashing
// exit:        -1      =>      gauge is not flashing
//                      0       =>      gauge is flashing, draw dim
//                      1       =>      gauge is flashing, draw bright
int hud_gauge_maybe_flash(int gauge_index)
{
        Assert(gauge_index >=0 && gauge_index < NUM_HUD_GAUGES);
        int flash_status=-1;
        if ( !timestamp_elapsed(HUD_gauge_flash_duration[gauge_index]) ) {
                if ( timestamp_elapsed(HUD_gauge_flash_next[gauge_index]) ) {
                        HUD_gauge_flash_next[gauge_index] = timestamp(HUD_GAUGE_FLASH_INTERVAL);
                        HUD_gauge_bright ^= (1<<gauge_index);   // toggle between default and bright frames
                }

                if ( HUD_gauge_bright & (1<<gauge_index) ) {
                        flash_status=1;
                } else {
                        flash_status=0;
                }
        }
        return flash_status;
}

// Init the objective message display data
void hud_objective_message_init()
{
        // ensure the talking head border is loaded
        if ( !Objective_display_gauge_inited ) {
                Objective_display_gauge.first_frame = bm_load_animation(Objective_fname[gr_screen.res], &Objective_display_gauge.num_frames);
                if ( Objective_display_gauge.first_frame == -1 ) {
                        Warning(LOCATION, "Could not load in ani: Objective_fname[gr_screen.res]\n");
                }
                Objective_display_gauge_inited = 1;
        }

        Objective_display.display_timer=timestamp(0);
}

// Display objective status on the HUD
// input:       type                    =>      type of goal, one of:   PRIMARY_GOAL
//                                                                                                                                      SECONDARY_GOAL
//                                                                                                                                      BONUS_GOAL
//
//                              status          => status of goal, one of:      GOAL_FAILED
//                                                                                                                                      GOAL_COMPLETE
//                                                                                                                                      GOAL_INCOMPLETE
//
void hud_add_objective_messsage(int type, int status)
{
        Objective_display.display_timer=timestamp(7000);
        Objective_display.goal_type=type;
        Objective_display.goal_status=status;

        // if this is a multiplayer tvt game
        if((Game_mode & GM_MULTIPLAYER) && (Netgame.type_flags & NG_TYPE_TEAM) && (Net_player != NULL)){
                mission_goal_fetch_num_resolved(type, &Objective_display.goal_nresolved, &Objective_display.goal_ntotal, Net_player->p_info.team);
        } else {
                mission_goal_fetch_num_resolved(type, &Objective_display.goal_nresolved, &Objective_display.goal_ntotal);
        }

        // TODO: play a sound?
}

// maybe display the 'subspace drive engaged' message
void hud_maybe_display_subspace_notify()
{
        int warp_aborted = 0;
        // maybe make gauge active
        if ( (Player->control_mode == PCM_WARPOUT_STAGE1) || (Player->control_mode == PCM_WARPOUT_STAGE2) || (Player->control_mode == PCM_WARPOUT_STAGE3) ) {
                if (!hud_subspace_notify_active()) {
                        // keep sound from being played 1e06 times
                        hud_start_subspace_notify();
                }
        } else {
                if ( !timestamp_elapsed(HUD_abort_subspace_timer) ) {
                        warp_aborted = 1;
                } else {
                        hud_stop_subspace_notify();
                }
        }

        if ( !hud_subspace_notify_active() ) {
                return;
        }

        if ( Objective_display_gauge.first_frame < 0 ) {
                return;
        }

        // blit the background  
        hud_set_gauge_color(HUD_OBJECTIVES_NOTIFY_GAUGE);
        GR_AABITMAP(Objective_display_gauge.first_frame, Objective_display_coords[gr_screen.res][0], Objective_display_coords[gr_screen.res][1]);       

        hud_targetbox_start_flash(TBOX_FLASH_OBJECTIVE);
        if(hud_targetbox_maybe_flash(TBOX_FLASH_OBJECTIVE)){
                hud_set_gauge_color(HUD_OBJECTIVES_NOTIFY_GAUGE, HUD_C_BRIGHT);
        } else {
                hud_set_gauge_color(HUD_OBJECTIVES_NOTIFY_GAUGE);
        }


        gr_string(0x8000, Subspace_text_coords[gr_screen.res][1],XSTR( "subspace drive", 233));
        if ( warp_aborted ) {
                gr_string(0x8000, Subspace_text_val_coords[gr_screen.res][1],XSTR( "aborted", 225));
        } else {
                gr_string(0x8000, Subspace_text_val_coords[gr_screen.res][1],XSTR( "engaged", 234));
        }
}

// maybe display the 'Downloading new orders' message
void hud_maybe_display_red_alert()
{
        if ( !red_alert_check_status() ) {
                return;
        }

        if ( Objective_display_gauge.first_frame < 0 ) {
                return;
        }

        if ( hud_subspace_notify_active() ) {
                return;
        }

        if ( hud_objective_notify_active() ) {
                return;
        }

        // blit the background
        gr_set_color_fast(&Color_red);          // color box red, cuz its an emergency for cryin out loud

        GR_AABITMAP(Objective_display_gauge.first_frame, Objective_display_coords[gr_screen.res][0], Objective_display_coords[gr_screen.res][1]);       

        hud_targetbox_start_flash(TBOX_FLASH_OBJECTIVE);
        if(hud_targetbox_maybe_flash(TBOX_FLASH_OBJECTIVE)) {
                gr_set_color_fast(&Color_red);
        } else {
                gr_set_color_fast(&Color_bright_red);
        }

        gr_string(0x8000, Red_text_coords[gr_screen.res][1], XSTR( "downloading new", 235));
        gr_string(0x8000, Red_text_val_coords[gr_screen.res][1], XSTR( "orders...", 236));

        // TODO: play a sound?
}

// Maybe show an objective status update on the HUD
void hud_maybe_display_objective_message()
{
        char buf[128];

        if ( timestamp_elapsed(Objective_display.display_timer) ) {
                hud_stop_objective_notify();
                return;
        }

        if ( Objective_display_gauge.first_frame < 0 ) {
                return;
        }

        if ( hud_subspace_notify_active() ) {
                return;
        }

        if (!hud_objective_notify_active()) {
                hud_start_objective_notify();
        }
        
        // blit the background
        hud_set_gauge_color(HUD_OBJECTIVES_NOTIFY_GAUGE);
        GR_AABITMAP(Objective_display_gauge.first_frame, Objective_display_coords[gr_screen.res][0], Objective_display_coords[gr_screen.res][1]);       

        hud_targetbox_start_flash(TBOX_FLASH_OBJECTIVE);
        if(hud_targetbox_maybe_flash(TBOX_FLASH_OBJECTIVE)){
                hud_set_gauge_color(HUD_OBJECTIVES_NOTIFY_GAUGE, HUD_C_BRIGHT);
        } else {
                hud_set_gauge_color(HUD_OBJECTIVES_NOTIFY_GAUGE);
        }

        // draw the correct goal type
        switch(Objective_display.goal_type) {
        case PRIMARY_GOAL:
                gr_string(0x8000, Objective_text_coords[gr_screen.res][1],XSTR( "primary objective", 237));
                break;
        case SECONDARY_GOAL:
                gr_string(0x8000, Objective_text_coords[gr_screen.res][1],XSTR( "secondary objective", 238));
                break;
        case BONUS_GOAL:
                gr_string(0x8000, Objective_text_coords[gr_screen.res][1],XSTR( "bonus objective", 239));
                break;
        }

        // show the status
        switch(Objective_display.goal_type) {
        case PRIMARY_GOAL:
        case SECONDARY_GOAL:
                switch(Objective_display.goal_status) {
                case GOAL_FAILED:
                        sprintf(buf, XSTR( "failed (%d/%d)", 240), Objective_display.goal_nresolved, Objective_display.goal_ntotal);
                        gr_string(0x8000, Objective_text_val_coords[gr_screen.res][1], buf);
                        break;
                default:
                        sprintf(buf, XSTR( "complete (%d/%d)", 241), Objective_display.goal_nresolved, Objective_display.goal_ntotal);
                        gr_string(0x8000, Objective_text_val_coords[gr_screen.res][1], buf);
                        break;
                }               
                break;
        case BONUS_GOAL:
                switch(Objective_display.goal_status) {
                case GOAL_FAILED:
                        gr_string(0x8000, Objective_text_val_coords[gr_screen.res][1], XSTR( "failed", 242));
                        break;
                default:
                        gr_string(0x8000, Objective_text_val_coords[gr_screen.res][1], XSTR( "complete", 226));
                        break;
                }               
                break;
        }
}

// return wing slot (0->3) based on name of ship.  Assumes ship is from Alpha,Beta, or 
// Gamma wings
int hud_wing_slot_from_name(char *name)
{
        int     rval;
        char    num[2];

        num[0]=name[strlen(name)-1];
        num[1]=0;

        rval = num[0] - '1';
        Assert(rval >= 0 && rval < 4);
        return rval;
}

// return index in starting wings (0->11) for specified ship.
int hud_wing_index_from_ship(int shipnum)
{
        int     i;
        ship    *shipp;

        shipp = &Ships[shipnum];

        int wing_num=0, wing_slot=0;

        for (i=0; i<3; i++) {
                if ( Starting_wings[i] < 0 ) {
                        continue;
                }

                if (shipp->wingnum == Starting_wings[i]) {
                        wing_num=i;
                        break;
                }
        }

        if ( i==3 ) {
                Int3();
        }

        wing_slot = hud_wing_slot_from_name(shipp->ship_name);
        return (i*4+wing_slot);
}

void hud_show_voice_status()
{
        char play_callsign[CALLSIGN_LEN+5];
        
        // if we are currently playing a rtvoice sound stream from another player back
        memset(play_callsign,0,CALLSIGN_LEN+5);
        switch(multi_voice_status()){
        // the player has been denied the voice token
        case MULTI_VOICE_STATUS_DENIED:
                // show a red indicator or something
                gr_string(Voice_coords[gr_screen.res][0], Voice_coords[gr_screen.res][1], XSTR( "[voice denied]", 243));
                break;

        // the player is currently recording
        case MULTI_VOICE_STATUS_RECORDING:
                gr_string(Voice_coords[gr_screen.res][0], Voice_coords[gr_screen.res][1], XSTR( "[recording voice]", 244));
                break;
                
        // the player is current playing back voice from someone
        case MULTI_VOICE_STATUS_PLAYING:
                gr_string(Voice_coords[gr_screen.res][0], Voice_coords[gr_screen.res][1], XSTR( "[playing voice]", 245));
                break;

        // nothing voice related is happening on my machine
        case MULTI_VOICE_STATUS_IDLE:
                // probably shouldn't be displaying anything
                break;
        }       
}

void hud_subspace_notify_abort()
{
        HUD_abort_subspace_timer = timestamp(1500);
}

void hud_stop_subspace_notify()
{
        Subspace_notify_active=0;
}

void hud_start_subspace_notify()
{

        Subspace_notify_active=1;
}

int hud_subspace_notify_active()
{
        return Subspace_notify_active;
}

void hud_stop_objective_notify()
{
        Objective_notify_active = 0;
}

void hud_start_objective_notify()
{
        snd_play(&(Snds[SND_DIRECTIVE_COMPLETE]));
        Objective_notify_active = 1;
}

int hud_objective_notify_active()
{
        return Objective_notify_active;
}

// render multiplayer text message currently being entered if any
void hud_maybe_render_multi_text()
{
        char txt[MULTI_MSG_MAX_TEXT_LEN+20];

        // clear the text
        memset(txt,0,MULTI_MSG_MAX_TEXT_LEN+1);

        // if there is valid multiplayer message text to be displayed
        if(multi_msg_message_text(txt)){
                gr_set_color_fast(&Color_normal);
                gr_string(Multi_msg_coords[gr_screen.res][0], Multi_msg_coords[gr_screen.res][1], txt);
        }
}

// cut any text off after (and including) '#' char
void hud_end_string_at_first_hash_symbol(char *src)
{
        char *pointer_to_last_char;

        pointer_to_last_char = strstr(src, NOX("#"));

        if ( pointer_to_last_char ) {
                *pointer_to_last_char = 0;
        }
}

// set the offset values for this render frame
void HUD_set_offsets(object *viewer_obj, int wiggedy_wack)
{
        if ( (viewer_obj == Player_obj) && wiggedy_wack ){              
                vector tmp;
                vertex pt;
                ubyte flags;            

                HUD_offset_x = 0.0f;
                HUD_offset_y = 0.0f;

                vm_vec_scale_add( &tmp, &Viewer_obj->pos, &Viewer_obj->orient.v.fvec, 100.0f );
                
                flags = g3_rotate_vertex(&pt,&tmp);

                if (flags == 0) {

                        g3_project_vertex(&pt);

                        if (!(pt.flags & PF_OVERFLOW))  {
                                HUD_offset_x -= 0.45f * (i2fl(gr_screen.clip_width)*0.5f - pt.sx);
                                HUD_offset_y -= 0.45f * (i2fl(gr_screen.clip_height)*0.5f - pt.sy);
                        }
                }

                if ( HUD_offset_x > 100.0f )    {
                        HUD_offset_x = 100.0f;
                } else if ( HUD_offset_x < -100.0f )    {
                        HUD_offset_x += 100.0f;
                }

                if ( HUD_offset_y > 100.0f )    {
                        HUD_offset_y = 100.0f;
                } else if ( HUD_offset_y < -100.0f )    {
                        HUD_offset_y += 100.0f;
                }

        } else {
                HUD_offset_x = 0.0f;
                HUD_offset_y = 0.0f;
        }
}

// Basically like gr_reset_clip only it accounts for hud jittering
void HUD_reset_clip()
{
        int hx = fl2i(HUD_offset_x);
        int hy = fl2i(HUD_offset_y);

        gr_set_clip(hx, hy, gr_screen.max_w, gr_screen.max_h );
}

// Basically like gr_set_clip only it accounts for hud jittering
void HUD_set_clip(int x, int y, int w, int h)
{
        int hx = fl2i(HUD_offset_x);
        int hy = fl2i(HUD_offset_y);

        gr_set_clip(hx+x, hy+y, w, h );
}

void hud_toggle_contrast()
{
        HUD_contrast = !HUD_contrast;
}

void hud_set_contrast(int high)
{
        HUD_contrast = high;
}

// Paging functions for the rest of the hud code
extern void hudwingmanstatus_page_in();
extern void hudescort_page_in();
extern void hudets_page_in();
extern void hudlock_page_in();
extern void hudreticle_page_in();
extern void hudshield_page_in();
extern void hudsquadmsg_page_in();
extern void hudtarget_page_in();
extern void hudtargetbox_page_in();

// Page in all hud bitmaps
void hud_page_in()
{
        int i;

        bm_page_in_aabitmap( Kills_gauge.first_frame, Kills_gauge.num_frames );
        bm_page_in_aabitmap( Head_frame_gauge.first_frame, Head_frame_gauge.num_frames );
        bm_page_in_aabitmap( Mission_time_gauge.first_frame, Mission_time_gauge.num_frames );
        for ( i = 0; i < NUM_DAMAGE_GAUGES; i++ ) {
                bm_page_in_aabitmap( Damage_gauges[i].first_frame, Damage_gauges[i].num_frames);
        }

        bm_page_in_aabitmap( Netlag_icon.first_frame, Netlag_icon.num_frames);                  
        bm_page_in_aabitmap( Support_view_gauge.first_frame, Support_view_gauge.num_frames);
        bm_page_in_aabitmap( Objective_display_gauge.first_frame, Objective_display_gauge.num_frames);          

        // Paging functions for the rest of the hud code
        hudwingmanstatus_page_in();
        hudescort_page_in();
        hudets_page_in();
        hudlock_page_in();
        hudreticle_page_in();
        hudshield_page_in();
        hudsquadmsg_page_in();
        hudtarget_page_in();
        hudtargetbox_page_in();
}