rendering functions mostly done; more complete shader setup

[taylor/freespace2.git] / include / weapon.h

/*
 * 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/Weapon/Weapon.h $
 * $Revision$
 * $Date$
 * $Author$
 *
 * <insert description of file here>
 *
 * $Log$
 * Revision 1.4  2003/06/11 18:30:32  taylor
 * plug memory leaks
 *
 * Revision 1.3  2003/05/25 02:30:42  taylor
 * Freespace 1 support
 *
 * Revision 1.2  2002/06/09 04:41:15  relnev
 * added copyright header
 *
 * Revision 1.1.1.1  2002/05/03 03:28:12  root
 * Initial import.
 *
 * 
 * 34    9/06/99 12:46a Andsager
 * Add weapon_explosion_ani LOD
 * 
 * 33    8/27/99 1:34a Andsager
 * Modify damage by shockwaves for BIG|HUGE ships.  Modify shockwave damge
 * when weapon blows up.
 * 
 * 32    8/24/99 10:47a Jefff
 * tech room weapon anims.  added tech anim field to weapons.tbl
 * 
 * 31    8/10/99 5:30p Jefff
 * Added tech_title string to weapon_info.  Changed parser accordingly.
 * 
 * 30    8/02/99 5:16p Dave
 * Bumped up weapon title string length from 32 to 48
 * 
 * 29    7/15/99 9:20a Andsager
 * FS2_DEMO initial checkin
 * 
 * 28    6/30/99 5:53p Dave
 * Put in new anti-camper code.
 * 
 * 27    6/21/99 7:25p Dave
 * netplayer pain packet. Added type E unmoving beams.
 * 
 * 26    6/14/99 10:45a Dave
 * Made beam weapons specify accuracy by skill level in the weapons.tbl
 * 
 * 25    6/04/99 2:16p Dave
 * Put in shrink effect for beam weapons.
 * 
 * 24    6/01/99 8:35p Dave
 * Finished lockarm weapons. Added proper supercap weapons/damage. Added
 * awacs-set-radius sexpression.
 * 
 * 23    5/27/99 6:17p Dave
 * Added in laser glows.
 * 
 * 22    5/20/99 7:00p Dave
 * Added alternate type names for ships. Changed swarm missile table
 * entries.
 * 
 * 21    4/28/99 11:13p Dave
 * Temporary checkin of artillery code.
 * 
 * 20    4/28/99 3:11p Andsager
 * Stagger turret weapon fire times.  Make turrets smarter when target is
 * protected or beam protected.  Add weaopn range to weapon info struct.
 * 
 * 19    4/22/99 11:06p Dave
 * Final pass at beam weapons. Solidified a lot of stuff. All that remains
 * now is to tweak and fix bugs as they come up. No new beam weapon
 * features.
 * 
 * 18    4/19/99 11:01p Dave
 * More sophisticated targeting laser support. Temporary checkin.
 * 
 * 17    4/16/99 5:54p Dave
 * Support for on/off style "stream" weapons. Real early support for
 * target-painting lasers.
 * 
 * 16    4/02/99 9:55a Dave
 * Added a few more options in the weapons.tbl for beam weapons. Attempt
 * at putting "pain" packets into multiplayer.
 * 
 * 15    3/31/99 8:24p Dave
 * Beefed up all kinds of stuff, incluging beam weapons, nebula effects
 * and background nebulae. Added per-ship non-dimming pixel colors.
 * 
 * 14    3/23/99 11:03a Dave
 * Added a few new fields and fixed parsing code for new weapon stuff.
 * 
 * 13    3/19/99 9:52a Dave
 * Checkin to repair massive source safe crash. Also added support for
 * pof-style nebulae, and some new weapons code.
 * 
 * 12    1/29/99 12:47a Dave
 * Put in sounds for beam weapon. A bunch of interface screens (tech
 * database stuff).
 * 
 * 11    1/27/99 9:56a Dave
 * Temporary checkin of beam weapons for Dan to make cool sounds.
 * 
 * 10    1/25/99 5:03a Dave
 * First run of stealth, AWACS and TAG missile support. New mission type
 * :)
 * 
 * 9     1/24/99 11:37p Dave
 * First full rev of beam weapons. Very customizable. Removed some bogus
 * Int3()'s in low level net code.
 * 
 * 8     1/21/99 10:45a Dave
 * More beam weapon stuff. Put in warmdown time.
 * 
 * 7     1/08/99 2:08p Dave
 * Fixed software rendering for pofview. Super early support for AWACS and
 * beam weapons.
 * 
 * 6     11/14/98 5:33p Dave
 * Lots of nebula work. Put in ship contrails.
 * 
 * 5     10/26/98 9:42a Dave
 * Early flak gun support.
 * 
 * 4     10/16/98 3:42p Andsager
 * increase MAX_WEAPONS and MAX_SHIPS and som header files
 * 
 * 3     10/07/98 6:27p Dave
 * Globalized mission and campaign file extensions. Removed Silent Threat
 * special code. Moved \cache \players and \multidata into the \data
 * directory.
 * 
 * 2     10/07/98 10:54a Dave
 * Initial checkin.
 * 
 * 1     10/07/98 10:51a Dave
 * 
 * 100   9/04/98 3:52p Dave
 * Put in validated mission updating and application during stats
 * updating.
 * 
 * 99    9/01/98 4:25p Dave
 * Put in total (I think) backwards compatibility between mission disk
 * freespace and non mission disk freespace, including pilot files and
 * campaign savefiles.
 * 
 * 98    8/28/98 3:29p Dave
 * EMP effect done. AI effects may need some tweaking as required.
 * 
 * 97    8/25/98 1:49p Dave
 * First rev of EMP effect. Player side stuff basically done. Next comes
 * AI code.
 * 
 * 96    8/18/98 10:15a Dave
 * Touchups on the corkscrew missiles. Added particle spewing weapons.
 * 
 * 95    8/17/98 5:07p Dave
 * First rev of corkscrewing missiles.
 * 
 * 94    5/18/98 1:58a Mike
 * Make Phoenix not be fired at fighters (but yes bombers).
 * Improve positioning of ships in guard mode.
 * Make turrets on player ship not fire near end of support ship docking.
 * 
 * 93    5/15/98 5:37p Hoffoss
 * Added new 'tech description' fields to ship and weapon tables, and
 * added usage of it in tech room.
 * 
 * 92    5/06/98 8:06p Dave
 * Made standalone reset properly under weird conditions. Tweak
 * optionsmulti screen. Upped MAX_WEAPONS to 350. Put in new launch
 * countdown anim. Minro ui fixes/tweaks.
 * 
 * 91    5/05/98 11:15p Lawrance
 * Optimize weapon flyby sound determination
 * 
 * 90    5/05/98 4:08p Hoffoss
 * Added WIF_PLAYER_ALLOWED to check what is valid for the weaponry pool
 * in Fred.
 * 
 * 89    4/23/98 5:50p Hoffoss
 * Added tracking of techroom database list info in pilot files, added
 * sexp to add more to list, made mouse usable on ship listing in tech
 * room.
 * 
 * 88    4/19/98 9:21p Sandeep
 * 
 * 87    4/13/98 5:11p Mike
 * More improvement to countermeasure code.
 * 
 * 86    4/10/98 11:02p Mike
 * Make countermeasures less effective against aspect seekers than against
 * heat seekers.
 * Make AI ships match bank with each other when attacking a faraway
 * target.
 * Make ships not do silly loop-de-loop sometimes when attacking a faraway
 * target.
 * 
 * 85    4/10/98 4:52p Hoffoss
 * Made several changes related to tooltips.
 * 
 * 84    4/02/98 11:40a Lawrance
 * check for #ifdef DEMO instead of #ifdef DEMO_RELEASE
 * 
 * 83    4/01/98 5:35p John
 * Made only the used POFs page in for a level.   Reduced some interp
 * arrays.    Made custom detail level work differently.
 * 
 * 82    3/21/98 3:37p Mike
 * Fix/optimize attacking of big ships.
 * 
 * 81    3/15/98 9:44p Lawrance
 * Get secondary weapons for turrets working
 * 
 * 79    3/12/98 1:24p Mike
 * When weapons linked, increase firing delay.
 * Free up weapon slots for AI ships, if necessary.
 * Backside render shield effect.
 * Remove shield hit triangle if offscreen.
 * 
 * 78    3/11/98 4:34p John
 * Made weapons have glow & thrusters.
 * 
 * 77    3/04/98 8:51a Mike
 * Working on making ships better about firing Synaptic.
 * 
 * 76    3/03/98 5:12p Dave
 * 50% done with team vs. team interface issues. Added statskeeping to
 * secondary weapon blasts. Numerous multiplayer ui bug fixes.
 * 
 * 75    3/02/98 10:00a Sandeep
 * 
 * 74    2/15/98 11:28p Allender
 * allow increase in MAX_WEAPON_TYPES by chaning all bitfield references
 * 
 * 73    2/11/98 1:52p Sandeep
 * 
 * 72    2/02/98 8:47a Andsager
 * Ship death area damage applied as instantaneous damage for small ships
 * and shockwaves for large (>50 radius) ships.
 * 
 * 71    1/29/98 11:48a John
 * Added new counter measure rendering as model code.   Made weapons be
 * able to have impact explosion.
 * 
 * 70    1/23/98 5:08p John
 * Took L out of vertex structure used B (blue) instead.   Took all small
 * fireballs out of fireball types and used particles instead.  Fixed some
 * debris explosion things.  Restructured fireball code.   Restructured
 * some lighting code.   Made dynamic lighting on by default. Made groups
 * of lasers only cast one light.  Made fireballs not cast light.
 * 
 * 69    1/21/98 7:20p Lawrance
 * removed unused mount_size member
 * 
 * 68    1/19/98 10:01p Lawrance
 * Implement "Electronics" missiles
 * 
 * 67    1/17/98 10:04p Lawrance
 * Implementing "must lock to fire" missiles.  Fix couple bugs with rearm
 * time display.
 * 
 * 66    1/17/98 4:45p Mike
 * Better support for AI selection of secondary weapons.
 * 
 * 65    1/16/98 11:43a Mike
 * Fix countermeasures.
 * 
 * 64    1/15/98 11:13a John
 * Added code for specifying weapon trail bitmaps in weapons.tbl
 * 
 * 63    1/06/98 6:58p Lawrance
 * Add wp->turret_subsys, which gets set when a turret fires a weapon.
 * 
 * $NoKeywords: $
 */

#ifndef _WEAPON_H
#define _WEAPON_H

// define moved to before includes so that we can have it available when ship.h is included below
#ifdef MAKE_FS1
#define MAX_WEAPON_TYPES                                48
#else
#define MAX_WEAPON_TYPES                                200
#endif

// define to compile corkscrew missiles in

#include "object.h"
#include "parselo.h"
#include "ship.h"               /* needed for ship_subsys* */
#include "2d.h"         // needed for color
#include "shockwave.h"
#include "trails.h"
#include "ai.h"

#define WP_UNUSED       -1
#define WP_LASER                0
#define WP_MISSILE      1
#define WP_BEAM         2

#define WRT_LASER       1
#define WRT_POF         2

//      Bitflags controlling weapon behavior
#define MAX_WEAPON_FLAGS        18                                              //      Maximum number of different bit flags legal to specify in a single weapons.tbl Flags line

#define WIF_HOMING_HEAT (1 << 0)                                //      if set, this weapon homes via seeking heat
#define WIF_HOMING_ASPECT       (1 << 1)                                //      if set, this weapon homes via chasing aspect
#define WIF_ELECTRONICS (1 << 2)                                //      Takes out electronics systems.
#define WIF_SPAWN                       (1 << 3)                                //      Spawns projectiles on detonation.
#define WIF_REMOTE                      (1 << 4)                                //      Can be remotely detonated by parent.
#define WIF_PUNCTURE            (1 << 5)                                //      Punctures armor, damaging subsystems.
#define WIF_SUPERCAP            (1 << 6)                                //      This is a weapon which does supercap class damage (meaning, it applies real damage to supercap ships)
#define WIF_AREA_EFFECT (1 << 7)                                //      Explosion has an area effect
#define WIF_SHOCKWAVE           (1 << 8)                                //      Explosion has a shockwave
#define  WIF_TURNS                      (1 << 9)                                // Set this if the weapon ever changes heading.  If you
                                                                                                                        // don't set this and the weapon turns, collision detection
                                                                                                                        // won't work, I promise!
#define WIF_SWARM                       (1 << 10)                       // Missile "swarms".. ie changes heading and twists on way to target
#define WIF_TRAIL                       (1 << 11)                       //      Has a trail
#define WIF_BIG_ONLY            (1 << 12)                       //      Only big ships (cruiser, capital, etc.) can arm this weapon
#define WIF_CHILD                       (1 << 13)                       //      No ship can have this weapon.  It gets created by weapon detonations.
#define WIF_BOMB                                (1 << 14)                       // Bomb-type missile, can be targeted
#define WIF_HUGE                                (1 << 15)                       //      Huge damage (generally 500+), probably only fired at huge ships.
#define WIF_NO_DUMBFIRE (1      <<      16)                     // Missile cannot be fired dumbfire (ie requires aspect lock)
#define  WIF_THRUSTER           (1 << 17)                       // Has thruster cone and/or glow
#define WIF_IN_TECH_DATABASE            (1 << 18)
#define WIF_PLAYER_ALLOWED              (1 << 19)   // allowed to be on starting wing ships/in weaponry pool
#define WIF_BOMBER_PLUS (1 << 20)                       //      Fire this missile only at a bomber or big ship.  But not a fighter.

#define WIF_CORKSCREW           (1 << 21)                       // corkscrew style missile
#define WIF_PARTICLE_SPEW       (1 << 22)                       // spews particles as it travels
#define WIF_EMP                         (1 << 23)                       // weapon explodes with a serious EMP effect
#define  WIF_ENERGY_SUCK        (1 << 24)                       // energy suck primary (impact effect)
#define WIF_FLAK                                (1 << 25)                       // use for big-ship turrets - flak gun
#define WIF_BEAM                                (1 << 26)                       // if this is a beam weapon : NOTE - VERY SPECIAL CASE
#define WIF_TAG                         (1 << 27)                       // this weapon has a tag effect when it hits
#define WIF_SHUDDER                     (1 << 28)                       // causes the weapon to shudder. shudder is proportional to the mass and damage of the weapon
#define WIF_MFLASH                      (1 << 29)                       // has muzzle flash
#define WIF_LOCKARM                     (1 << 30)                       // if the missile was fired without a lock, it does significanlty less damage on impact
#define  WIF_STREAM                     (1 << 31)                       // handled by "trigger down/trigger up" instead of "fire - wait - fire - wait"

#define WIF_HOMING                                      (WIF_HOMING_HEAT | WIF_HOMING_ASPECT)
#define  WIF_HURTS_BIG_SHIPS            (WIF_BOMB | WIF_BEAM | WIF_HUGE | WIF_BIG_ONLY)

#define WEAPON_EXHAUST_DELTA_TIME       75              //      Delay in milliseconds between exhaust blobs

#define WF_LOCK_WARNING_PLAYED          (1<<0)          // set when a lock warning sound is played for the player
                                                                                                                                //      (needed since we don't want to play multiple lock sounds)
#define WF_ALREADY_APPLIED_STATS                (1<<1)          // for use in ship_apply_local and ship_apply_global damage functions
                                                                                                                                // so that we don't record multiple hits (stats) for one impact
#define WF_PLAYED_FLYBY_SOUND                   (1<<2)          // flyby sound has been played for this weapon
#define WF_CONSIDER_FOR_FLYBY_SOUND     (1<<3)          // consider for flyby
#define WF_DEAD_IN_WATER                                (1<<4)          // a missiles engines have died
#define WF_LOCKED_WHEN_FIRED                    (1<<5)          // fired with a lock
#define WF_DESTROYED_BY_WEAPON          (1<<6)          // destroyed by damage from other weapon

typedef struct weapon {
        int             weapon_info_index;                      // index into weapon_info array
        int             objnum;                                                 // object number for this weapon
        int             team;                                                           // The team of the ship that fired this
        int             species;                                                        // The species of the ship that fired this
        float           lifeleft;                                               // life left on this weapon     
        int             target_num;                                             //      Object index of target
        int             target_sig;                                             //      So we know if the target is the same one we've been tracking
        float           nearest_dist;                                   //      nearest distance yet attained to target
        fix             creation_time;                                  //      time at which created, stuffed Missiontime
        int             weapon_flags;                                   //      bit flags defining behavior, see WF_xxxx
        object* homing_object;                                  //      object this weapon is homing on.
        ship_subsys*    homing_subsys;                  // subsystem this weapon is homing on
        vector  homing_pos;                                             // world position missile is homing on
        short           swarm_index;                                    // index into swarm missile info, -1 if not WIF_SWARM
        int             missile_list_index;                     // index for missiles into Missile_obj_list, -1 weapon not missile
        int             trail_num;                                              // -1 if no trail, else index into Trails array
        ship_subsys *turret_subsys;                     // points to turret that fired weapon, otherwise NULL
        int             group_id;                                               // Which group this is in.

        // Stuff for thruster glows
        int             thruster_bitmap;                                        // What frame the current thruster bitmap is at for this weapon
        float           thruster_frame;                                 // Used to keep track of which frame the animation should be on.
        int             thruster_glow_bitmap;                   // What frame the current thruster engine glow bitmap is at for this weapon
        float           thruster_glow_frame;                            // Used to keep track of which frame the engine glow animation should be on.
        float           thruster_glow_noise;                            // Noise for current frame

        int             pick_big_attack_point_timestamp;        //      Timestamp at which to pick a new point to attack.
        vector  big_attack_point;                               //      Target-relative location of attack point.

        int             cmeasure_ignore_objnum;         //      Ignoring this countermeasure.  It's failed to attract this weapon.
        int             cmeasure_chase_objnum;          //      Chasing this countermeasure.  Don't maybe ignore in future.

        // corkscrew info (taken out for now)
        short   cscrew_index;                                           // corkscrew info index

        // particle spew info
        int             particle_spew_time;                     // time to spew next bunch of particles 

        // flak info
        short flak_index;                                                       // flak info index
} weapon;


#if defined(FS2_DEMO) || defined(FS1_DEMO)
        #define MAX_WEAPONS     100
#else
        // upped 5/6/98 from 200 - DB
        #define MAX_WEAPONS     350
#endif

// info specific to beam weapons
#define MAX_BEAM_SECTIONS                               5
typedef struct beam_weapon_section_info {
        float width;                                                    // width of the section
        int texture;                                                    // texture bitmap
        ubyte rgba_inner[4];                                    // for non-textured beams
        ubyte rgba_outer[4];                                    // for non-textured beams
        float flicker;                                                  // how much it flickers (0.0 to 1.0)
        float z_add;                                                    // is this necessary?
} beam_weapon_section_info;

typedef struct beam_weapon_info {
        int     beam_type;                                              // beam type
        float   beam_life;                                              // how long it lasts
        int     beam_warmup;                                    // how long it takes to warmup (in ms)
        int     beam_warmdown;                                  // how long it takes to warmdown (in ms)
        float   beam_muzzle_radius;                     // muzzle glow radius
        int     beam_particle_count;                    // beam spew particle count
        float   beam_particle_radius;           // radius of beam particles
        float   beam_particle_angle;                    // angle of beam particle spew cone
        int     beam_particle_ani;                      // particle ani
        float   beam_miss_factor[NUM_SKILL_LEVELS];                             // magic # which makes beams miss more. by skill level
        int     beam_loop_sound;                                // looping beam sound
        int     beam_warmup_sound;                      // warmup sound
        int     beam_warmdown_sound;                    // warmdown sound
        int     beam_num_sections;                      // the # of visible "sections" on the beam
        int     beam_glow_bitmap;                               // muzzle glow bitmap
        int     beam_shots;                                             // # of shots the beam takes
        float   beam_shrink_factor;                     // what percentage of total beam lifetime when the beam starts shrinking
        float beam_shrink_pct;                          // what percent/second the beam shrinks at
        beam_weapon_section_info sections[MAX_BEAM_SECTIONS];                   // info on the visible sections of the beam     
} beam_weapon_info;

extern weapon Weapons[MAX_WEAPONS];

#define WEAPON_TITLE_LEN                        48

typedef struct weapon_info {
        char    name[NAME_LENGTH];                              // name of this weapon
        char    title[WEAPON_TITLE_LEN];                // official title of weapon (used by tooltips)
        char    *desc;                                                          // weapon's description (used by tooltips)
        int     subtype;                                                                // one of the WP_* macros above
        int     render_type;                                            //      rendering method, laser, pof, avi
        char    pofbitmap_name[NAME_LENGTH];    // Name of the pof representing this if POF, or bitmap filename if bitmap
        int     model_num;                                                      // modelnum of weapon -- -1 if no model

        char    *tech_desc;                                                             // weapon's description (in tech database)
        char    tech_anim_filename[NAME_LENGTH];        // weapon's tech room animation
        char    tech_title[NAME_LENGTH];                        // weapon's name (in tech database)

        int     laser_bitmap;                                           // Which bitmap renders for laser, -1 if none
        int     laser_glow_bitmap;                              // optional bitmap for laser glow
        float laser_length;
        color   laser_color_1;                                          // for cycling between glow colors
        color   laser_color_2;                                          // for cycling between glow colors
        float   laser_head_radius, laser_tail_radius;

        float   max_speed;                                                      // initial speed of the weapon
        float mass;                                                                     // mass of the weapon
        float fire_wait;                                                        // fire rate -- amount of time before you can refire the weapon
        float   blast_force;                                            // force this weapon exhibits when hitting an object
        float   damage;                                                         //      damage of weapon (for missile, damage within inner radius)
        float   inner_radius, outer_radius;     // damage radii for missiles (0 means impact only)
        float   shockwave_speed;                                        // speed of shockwave ( 0 means none )
        float   armor_factor, shield_factor, subsystem_factor;  //      in 0.0..2.0, scale of damage done to type of thing
        float   lifetime;                                                       //      How long this thing lives.
        float energy_consumed;                                  // Energy used up when weapon is fired
        int     wi_flags;                                                       //      bit flags defining behavior, see WIF_xxxx
        float turn_time;
        float   cargo_size;                                                     // cargo space taken up by individual weapon (missiles only)
        float rearm_rate;                                                       // rate per second at which secondary weapons are loaded during rearming
        float   weapon_range;                                           // max range weapon can be effectively fired.  (May be less than life * speed)

        // spawn weapons
        short   spawn_type;                                                     //      Type of weapon to spawn when detonated.
        short   spawn_count;                                            //      Number of weapons of spawn_type to spawn.

        // swarm count
        short swarm_count;                                              // how many swarm missiles are fired for this weapon

        //      Specific to ASPECT homing missiles.
        float   min_lock_time;                                          // minimum time (in seconds) to achieve lock
        int     lock_pixels_per_sec;                            // pixels/sec moved while locking
        int     catchup_pixels_per_sec;                 // pixels/sec moved while catching-up for a lock                                
        int     catchup_pixel_penalty;                  // number of extra pixels to move while locking as a penalty for catching up for a lock                 

        //      Specific to HEAT homing missiles.
        float   fov;

        int     launch_snd;
        int     impact_snd;
        int     flyby_snd;                                                      //      whizz-by sound, transmitted through weapon's portable atmosphere.
        
        // Specific to weapons with TRAILS:
        trail_info tr_info;                     

        char    icon_filename[NAME_LENGTH];     // filename for icon that is displayed in weapon selection
        char    anim_filename[NAME_LENGTH];     // filename for animation that plays in weapon selection

        int     impact_weapon_expl_index;               // Index into Weapon_expl_info of which ANI should play when this thing impacts something
        float   impact_explosion_radius;                // How big the explosion should be

        // EMP effect
        float emp_intensity;                                    // intensity of the EMP effect
        float emp_time;                                         // time of the EMP effect

        // Energy suck effect
        float weapon_reduce;                                    // how much energy removed from weapons systems
        float afterburner_reduce;                       // how much energy removed from weapons systems

        // Beam weapon effect   
        beam_weapon_info        b_info;                 // this must be valid if the weapon is a beam weapon WIF_BEAM or WIF_BEAM_SMALL

        // tag stuff
        float   tag_time;                                               // how long the tag lasts               
        int tag_level;                                                  // tag level (1 - 3)

        // muzzle flash
        int muzzle_flash;                                               // muzzle flash stuff
} weapon_info;

// Data structure to track the active missiles
typedef struct missile_obj {
        missile_obj *next, *prev;
        int                     flags, objnum;
} missile_obj;
extern missile_obj Missile_obj_list;

extern weapon_info Weapon_info[MAX_WEAPON_TYPES];

extern int Num_weapon_types;                    // number of weapons in the game
extern int First_secondary_index;
extern int Num_weapons;

extern int Num_player_weapon_precedence;                                // Number of weapon types in Player_weapon_precedence
extern int Player_weapon_precedence[MAX_WEAPON_TYPES];  // Array of weapon types, precedence list for player weapon selection
extern char     *Weapon_names[MAX_WEAPON_TYPES];

#define WEAPON_INDEX(wp)                                (wp-Weapons)
#define WEAPON_INFO_INDEX(wip)          (wip-Weapon_info)


int weapon_info_lookup(const char *name);
void weapon_init();                                     // called at game startup
void weapon_level_init();                       // called before the start of each level
void weapon_render(object * obj);
void weapon_delete( object * obj );
void weapon_process_pre( object *obj, float frame_time);
void weapon_process_post( object *obj, float frame_time);

// Group_id:  If you should quad lasers, they should all have the same group id.  
// This will be used to optimize lighting, since each group only needs to cast one light.
// Call this to get a new group id, then pass it to each weapon_create call for all the
// weapons in the group.   Number will be between 0 and WEAPON_MAX_GROUP_IDS and will
// get reused.
int weapon_create_group_id();

// How many unique groups of weapons there can be at one time. 
#define WEAPON_MAX_GROUP_IDS 256

// Passing a group_id of -1 means it isn't in a group.  See weapon_create_group_id for more 
// help on weapon groups.
int weapon_create( vector * pos, matrix * orient, int weapon_type, int parent_obj, int secondary_flag, int group_id=-1, int is_locked = 0);
void weapon_set_tracking_info(int weapon_objnum, int parent_objnum, int target_objnum, int target_is_locked = 0, ship_subsys *target_subsys = NULL);

// for weapons flagged as particle spewers, spew particles. wheee
void weapon_maybe_spew_particle(object *obj);


void weapon_hit( object * weapon_obj, object * other_obj, vector * hitpos );
int weapon_name_lookup(const char *name);
void spawn_child_weapons( object *objp );

// call to detonate a weapon. essentially calls weapon_hit() with other_obj as NULL, and sends a packet in multiplayer
void weapon_detonate(object *objp);

void    weapon_area_apply_blast(vector *force_apply_pos, object *ship_objp, vector *blast_pos, float blast, int make_shockwave);
int     weapon_area_calc_damage(object *objp, vector *pos, float inner_rad, float outer_rad, float max_blast, float max_damage,
                                                                                float *blast, float *damage, float limit);

void    missile_obj_list_rebuild();     // called by save/restore code only
missile_obj *missile_obj_return_address(int index);
void find_homing_object_cmeasures();

// THE FOLLOWING FUNCTION IS IN SHIP.CPP!!!!
// JAS - figure out which thruster bitmap will get rendered next
// time around.  ship_render needs to have shipp->thruster_bitmap set to
// a valid bitmap number, or -1 if we shouldn't render thrusters.
// This does basically the same thing as ship_do_thruster_frame, except it
// operates on a weapon.   This is in the ship code because it needs
// the same thruster animation info as the ship stuff, and I would
// rather extern this one function than all the thruster animation stuff.
void ship_do_weapon_thruster_frame( weapon *weaponp, object *objp, float frametime );

// call to get the "color" of the laser at the given moment (since glowing lasers can cycle colors)
void weapon_get_laser_color(color *c, object *objp);

void weapon_hit_do_sound(object *hit_obj, weapon_info *wip, vector *hitpos);

// return a scale factor for damage which should be applied for 2 collisions
float weapon_get_damage_scale(weapon_info *wip, object *wep, object *target);

// return handle to explosion ani
int weapon_get_expl_handle(int weapon_expl_index, vector *pos, float size);

void weapon_close();    // called in game_shutdown() to free malloc'd memory

#endif