src/hud/hudets.cpp

   1 /*
   2  * Copyright (C) Volition, Inc. 1999.  All rights reserved.
   3  *
   4  * All source code herein is the property of Volition, Inc. You may not sell
   5  * or otherwise commercially exploit the source or things you created based on
   6  * the source.
   7  */
   8
   9 /*
  10  * $Logfile: /Freespace2/code/Hud/HUDets.cpp $
  11  * $Revision$
  12  * $Date$
  13  * $Author$
  14  *
  15  * C file that contains code to manage and display the Energy Transfer System (ETS)
  16  *
  17  * $Log$
  18  * Revision 1.3  2002/06/09 04:41:21  relnev
  19  * added copyright header
  20  *
  21  * Revision 1.2  2002/05/07 03:16:45  theoddone33
  22  * The Great Newline Fix
  23  *
  24  * Revision 1.1.1.1  2002/05/03 03:28:09  root
  25  * Initial import.
  26  *
  27  *
  28  * 14    10/28/99 11:17p Jefff
  29  * nudged German "A" on ETS
  30  *
  31  * 13    10/26/99 11:02p Jefff
  32  * changed german ets labels
  33  *
  34  * 12    9/05/99 11:23p Jimb
  35  * changed weapon and shield recharge rates for skill levels
  36  *
  37  * 11    9/03/99 2:28p Mikek
  38  * Slightly increase rate of weapon recharge at Medium and Hard.  Slightly
  39  * decrease at Easy.
  40  *
  41  * 10    8/01/99 12:39p Dave
  42  * Added HUD contrast control key (for nebula).
  43  *
  44  * 9     6/10/99 3:43p Dave
  45  * Do a better job of syncing text colors to HUD gauges.
  46  *
  47  * 8     2/23/99 8:11p Dave
  48  * Tidied up dogfight mode. Fixed TvT ship type problems for alpha wing.
  49  * Small pass over todolist items.
  50  *
  51  * 7     1/07/99 9:06a Jasen
  52  * coords updated
  53  *
  54  * 6     12/28/98 3:17p Dave
  55  * Support for multiple hud bitmap filenames for hi-res mode.
  56  *
  57  * 5     12/21/98 5:02p Dave
  58  * Modified all hud elements to be multi-resolution friendly.
  59  *
  60  * 4     11/05/98 4:18p Dave
  61  * First run nebula support. Beefed up localization a bit. Removed all
  62  * conditional compiles for foreign versions. Modified mission file
  63  * format.
  64  *
  65  * 3     10/13/98 9:28a Dave
  66  * Started neatening up freespace.h. Many variables renamed and
  67  * reorganized. Added AlphaColors.[h,cpp]
  68  *
  69  * 2     10/07/98 10:53a Dave
  70  * Initial checkin.
  71  *
  72  * 1     10/07/98 10:49a Dave
  73  *
  74  * 60    8/28/98 3:28p Dave
  75  * EMP effect done. AI effects may need some tweaking as required.
  76  *
  77  * 59    8/25/98 1:48p Dave
  78  * First rev of EMP effect. Player side stuff basically done. Next comes
  79  * AI code.
  80  *
  81  * 58    6/19/98 3:49p Lawrance
  82  * localization tweaks
  83  *
  84  * 57    4/07/98 1:53p Lawrance
  85  * Make energy system matter more.
  86  *
  87  * 56    3/26/98 5:26p John
  88  * added new paging code. nonfunctional.
  89  *
  90  * 55    2/23/98 6:49p Lawrance
  91  * Use gr_aabitmap_ex() instead of clipping regions
  92  *
  93  * 54    2/22/98 4:17p John
  94  * More string externalization classification... 190 left to go!
  95  *
  96  * 53    2/12/98 4:58p Lawrance
  97  * Change to new flashing method.
  98  *
  99  * 52    1/19/98 11:37p Lawrance
 100  * Fixing Optimization build warnings
 101  *
 102  * 51    1/05/98 9:38p Lawrance
 103  * Implement flashing HUD gauges.
 104  *
 105  * 50    1/02/98 9:10p Lawrance
 106  * Big changes to how colors get set on the HUD.
 107  *
 108  * 49    12/30/97 4:28p Lawrance
 109  * remove .ani extensions from filenames
 110  *
 111  * 48    12/01/97 12:27a Lawrance
 112  * redo default alpha color for HUD, make it easy to modify in the future
 113  *
 114  * 47    11/15/97 6:10p Lawrance
 115  * make ship speed less dependant on engine damage
 116  *
 117  * 46    11/11/97 12:58a Lawrance
 118  * deal with situation where ship has no shields
 119  *
 120  * 45    11/10/97 2:58p Lawrance
 121  * fix bug that was preventing engine damage from affecting AI ships
 122  *
 123  * 44    11/09/97 3:25p Lawrance
 124  * increase default alpha color
 125  *
 126  * 43    11/06/97 10:32a Lawrance
 127  * brighten up energy management bars
 128  *
 129  * 42    11/05/97 11:19p Lawrance
 130  * implement new ETS gauge
 131  *
 132  * 41    11/05/97 4:04p Lawrance
 133  * engine speed not affected on Trainee ONLY for player ship
 134  *
 135  * 40    10/28/97 3:35p Lawrance
 136  * subsystems will not be affected when playing on lowest skill level
 137  *
 138  * $NoKeywords: $
 139  */
 140
 141
 142 #include "hudets.h"
 143 #include "hud.h"
 144 #include "ship.h"
 145 #include "freespace.h"
 146 #include "player.h"
 147 #include "2d.h"
 148 #include "timer.h"
 149 #include "sound.h"
 150 #include "gamesnd.h"
 151 #include "bmpman.h"
 152 #include "emp.h"
 153 #include "localize.h"
 154
 155 #define ENERGY_DIVERT_DELTA                             0.2f    // percentage of energy transferred in a shield->weapon or weapon->shield energy transfer
 156 #define INTIAL_SHIELD_RECHARGE_INDEX    4               // default shield charge rate (index in Energy_levels[])
 157 #define INTIAL_WEAPON_RECHARGE_INDEX    4               // default weapon charge rate (index in Energy_levels[])
 158 #define INTIAL_ENGINE_RECHARGE_INDEX    4               // default engine charge rate (index in Energy_levels[])
 159
 160 #define MAX_SHIELD_REGEN_PER_SECOND             0.02f   //      max percent/100 of shield energy regenerated per second
 161 #define MAX_WEAPON_REGEN_PER_SECOND             0.04f   // max percent/100 of weapon energy regenerated per second
 162
 163 #define NUM_ENERGY_LEVELS       13
 164 #define MAX_ENERGY_INDEX        (NUM_ENERGY_LEVELS - 1)
 165 float Energy_levels[NUM_ENERGY_LEVELS] = {0.0f,  0.0833f, 0.167f, 0.25f, 0.333f, 0.417f, 0.5f, 0.583f, 0.667f, 0.75f, 0.833f, 0.9167f, 1.0f};
 166
 167 #define AI_MODIFY_ETS_INTERVAL 500      // time between ets modifications for ai's (in milliseconds)
 168
 169 int Weapon_energy_cheat = 0;
 170
 171 // skill level scaling of the amount of energy that is allocated to the weapons and
 172 // shields
 173 float   Skill_level_weapon_energy_scale[NUM_SKILL_LEVELS] = {10.0f, 4.0f, 2.5f, 2.0f, 1.5f};
 174 float Skill_level_shield_energy_scale[NUM_SKILL_LEVELS] = {4.0f, 2.0f, 1.5f, 1.25f, 1.0f};
 175
 176 #define ZERO_INDEX                      0
 177 #define ONE_THIRD_INDEX         4
 178 #define ONE_HALF_INDEX          6
 179 #define ALL_INDEX                               12
 180
 181 #define HAS_ENGINES                     (1<<0)
 182 #define HAS_SHIELDS                     (1<<1)
 183 #define HAS_WEAPONS                     (1<<2)
 184
 185 int ETS_bar_h[GR_NUM_RESOLUTIONS] = {
 186         41,
 187         41
 188 };
 189
 190 typedef struct ets_gauge_info
 191 {
 192         char    letter;
 193         int     letter_coords[2];
 194         int     top_coords[2];
 195         int     bottom_coords[2];
 196 } ets_gauge_info;
 197
 198 ets_gauge_info Ets_gauge_info_german[GR_NUM_RESOLUTIONS][3] =
 199 {
 200         { // GR_640
 201                 'G', {525,422}, {523,380}, {523,430},
 202                 'S', {542,422}, {540,380}, {540,430},
 203                 'A', {559,422}, {557,380}, {557,430}
 204         },
 205         { // GR_1024
 206                 'G', {882,690}, {880,648}, {880,698},
 207                 'S', {900,690}, {898,648}, {898,698},
 208                 'A', {917,690}, {916,648}, {916,698}
 209         }
 210 };
 211 ets_gauge_info Ets_gauge_info_french[GR_NUM_RESOLUTIONS][3] =
 212 {
 213         { // GR_640
 214                 'C', {525,422}, {523,380}, {523,430},
 215                 'B', {542,422}, {540,380}, {540,430},
 216                 'M', {560,422}, {557,380}, {557,430}
 217         },
 218         { // GR_1024
 219                 'C', {882,690}, {880,648}, {880,698},
 220                 'B', {900,690}, {898,648}, {898,698},
 221                 'M', {918,690}, {916,648}, {916,698}
 222         },
 223 };
 224 ets_gauge_info Ets_gauge_info_english[GR_NUM_RESOLUTIONS][3] =
 225 {
 226         { // GR_640
 227                 'G', {525,422}, {523,380}, {523,430},
 228                 'S', {542,422}, {540,380}, {540,430},
 229                 'E', {560,422}, {557,380}, {557,430}
 230         },
 231         { // GR_1024
 232                 'G', {882,690}, {880,648}, {880,698},
 233                 'S', {900,690}, {898,648}, {898,698},
 234                 'E', {918,690}, {916,648}, {916,698}
 235         }
 236 };
 237 ets_gauge_info *Ets_gauge_info = NULL;
 238
 239 char Ets_fname[GR_NUM_RESOLUTIONS][MAX_FILENAME_LEN] = {
 240         "energy1",
 241         "energy1"
 242 };
 243
 244 hud_frames Ets_gauge;
 245
 246 static int Hud_ets_inited = 0;
 247
 248 void hud_init_ets()
 249 {
 250         if ( Hud_ets_inited )
 251                 return;
 252
 253         Ets_gauge.first_frame = bm_load_animation(Ets_fname[gr_screen.res], &Ets_gauge.num_frames);
 254         if ( Ets_gauge.first_frame < 0 ) {
 255                 Warning(LOCATION,"Cannot load hud ani: Ets_fname[gr_screen.res]\n");
 256         }
 257
 258         if(Lcl_gr){
 259                 Ets_gauge_info = Ets_gauge_info_german[gr_screen.res];
 260         } else if(Lcl_fr){
 261                 Ets_gauge_info = Ets_gauge_info_french[gr_screen.res];
 262         } else {
 263                 Ets_gauge_info = Ets_gauge_info_english[gr_screen.res];
 264         }
 265
 266         Hud_ets_inited = 1;
 267 }
 268
 269 // -------------------------------------------------------------------------------------------------
 270 // ets_init_ship() is called by a ship when it is created (effectively, for every ship at the start
 271 // of a mission).  This will set the default charge rates for the different systems and initalialize
 272 // the weapon energy reserve.
 273 //
 274 void ets_init_ship(object* obj)
 275 {
 276         ship* sp;
 277
 278         // fred should bail here
 279         if(Fred_running){
 280                 return;
 281         }
 282
 283         Assert(obj->type == OBJ_SHIP);
 284         sp = &Ships[obj->instance];
 285
 286         sp->weapon_energy = Ship_info[sp->ship_info_index].max_weapon_reserve;
 287         sp->next_manage_ets = timestamp(AI_MODIFY_ETS_INTERVAL);
 288         set_default_recharge_rates(obj);
 289 }
 290
 291 // -------------------------------------------------------------------------------------------------
 292 // update_ets() is called once per frame for every OBJ_SHIP in the game.  The amount of energy
 293 // to send to the weapons and shields is calculated, and the top ship speed is calculated.  The
 294 // amount of time elapsed from the previous call is passed in as the parameter fl_frametime.
 295 //
 296 // parameters:   obj          ==> object that is updating their energy system
 297 //               fl_frametime ==> game frametime (in seconds)
 298 //
 299 void update_ets(object* objp, float fl_frametime)
 300 {
 301         float max_new_shield_energy, max_new_weapon_energy, _ss;
 302
 303         if ( fl_frametime <= 0 ){
 304                 return;
 305         }
 306
 307         ship* ship_p = &Ships[objp->instance];
 308         ship_info* sinfo_p = &Ship_info[ship_p->ship_info_index];
 309
 310         if ( ship_p->flags & SF_DYING ){
 311                 return;
 312         }
 313
 314         if ( sinfo_p->power_output == 0 ){
 315                 return;
 316         }
 317
 318 //      new_energy = fl_frametime * sinfo_p->power_output;
 319
 320         // update weapon energy
 321         max_new_weapon_energy = fl_frametime * MAX_WEAPON_REGEN_PER_SECOND * sinfo_p->max_weapon_reserve;
 322         if ( objp->flags & OF_PLAYER_SHIP ) {
 323                 ship_p->weapon_energy += Energy_levels[ship_p->weapon_recharge_index] * max_new_weapon_energy * Skill_level_weapon_energy_scale[Game_skill_level];
 324         } else {
 325                 ship_p->weapon_energy += Energy_levels[ship_p->weapon_recharge_index] * max_new_weapon_energy;
 326         }
 327
 328         if ( ship_p->weapon_energy > sinfo_p->max_weapon_reserve ){
 329                 ship_p->weapon_energy = sinfo_p->max_weapon_reserve;
 330         }
 331
 332         float shield_delta;
 333         max_new_shield_energy = fl_frametime * MAX_SHIELD_REGEN_PER_SECOND * sinfo_p->shields;
 334         if ( objp->flags & OF_PLAYER_SHIP ) {
 335                 shield_delta = Energy_levels[ship_p->shield_recharge_index] * max_new_shield_energy * Skill_level_shield_energy_scale[Game_skill_level];
 336         } else {
 337                 shield_delta = Energy_levels[ship_p->shield_recharge_index] * max_new_shield_energy;
 338         }
 339
 340         add_shield_strength(objp, shield_delta);
 341
 342         if ( (_ss = get_shield_strength(objp)) > sinfo_p->shields ){
 343                 for (int i=0; i<MAX_SHIELD_SECTIONS; i++){
 344                         objp->shields[i] *= sinfo_p->shields/ _ss;
 345                 }
 346         }
 347
 348         // calculate the top speed of the ship based on the energy flow to engines
 349         float y = Energy_levels[ship_p->engine_recharge_index];
 350
 351         // check for a shortcuts first before doing linear interpolation
 352         if ( y == Energy_levels[INTIAL_ENGINE_RECHARGE_INDEX] ){
 353                 ship_p->current_max_speed = sinfo_p->max_speed;
 354         } else if ( y == 0.0f ){
 355                 ship_p->current_max_speed = 0.5f * sinfo_p->max_speed;
 356         } else if ( y == 1.0f ){
 357                 ship_p->current_max_speed = sinfo_p->max_overclocked_speed;
 358         } else {
 359                 // do a linear interpolation to find the current max speed, using points (0,1/2 default_max_speed) (.333,default_max_speed)
 360                 // x = x1 + (y-y1) * (x2-x1) / (y2-y1);
 361                 if ( y < Energy_levels[INTIAL_ENGINE_RECHARGE_INDEX] ){
 362                         ship_p->current_max_speed =  0.5f*sinfo_p->max_speed + (y  * (0.5f*sinfo_p->max_speed) ) / Energy_levels[INTIAL_ENGINE_RECHARGE_INDEX];
 363                 } else {
 364                         // do a linear interpolation to find the current max speed, using points (.333,default_max_speed) (1,max_overclock_speed)
 365                         ship_p->current_max_speed = sinfo_p->max_speed + (y - Energy_levels[INTIAL_ENGINE_RECHARGE_INDEX]) * (sinfo_p->max_overclocked_speed - sinfo_p->max_speed) / (1.0f - Energy_levels[INTIAL_ENGINE_RECHARGE_INDEX]);
 366                 }
 367         }
 368
 369         // AL 11-15-97: Rules for engine strength affecting max speed:
 370         //                                              1. if strength >= 0.5 no affect
 371         //                                              2. if strength < 0.5 then max_speed = sqrt(strength)
 372         //
 373         //                                       This will translate to 71% max speed at 50% engines, and 31% max speed at 10% engines
 374         //
 375         float strength = ship_get_subsystem_strength(ship_p, SUBSYSTEM_ENGINE);
 376
 377         // don't let engine strength affect max speed when playing on lowest skill level
 378         if ( (objp != Player_obj) || (Game_skill_level > 0) ) {
 379                 if ( strength < 0.5 ) {
 380                         ship_p->current_max_speed *= fl_sqrt(strength);
 381                 }
 382         }
 383
 384         if ( timestamp_elapsed(ship_p->next_manage_ets) ) {
 385                 if ( !(objp->flags & OF_PLAYER_SHIP) ) {
 386                         ai_manage_ets(objp);
 387                         ship_p->next_manage_ets = timestamp(AI_MODIFY_ETS_INTERVAL);
 388                 }
 389                 else {
 390                         if ( Weapon_energy_cheat ){
 391                                 ship_p->weapon_energy = sinfo_p->max_weapon_reserve;
 392                         }
 393                 }
 394         }
 395 }
 396
 397
 398 // -------------------------------------------------------------------------------------------------
 399 // ai_manage_ets() will determine if a ship should modify it's energy transfer percentages, or
 400 // transfer energy from shields->weapons or from weapons->shields
 401 //
 402
 403 // minimum level rule constants
 404 #define SHIELDS_MIN_LEVEL_PERCENT       0.3f
 405 #define WEAPONS_MIN_LEVEL_PERCENT       0.3f
 406
 407 // maximum level rule constants
 408 #define SHIELDS_MAX_LEVEL_PERCENT       0.8f
 409 #define WEAPONS_MAX_LEVEL_PERCENT       0.8f
 410
 411 // emergency rule constants
 412 #define SHIELDS_EMERG_LEVEL_PERCENT     0.10f
 413 #define WEAPONS_EMERG_LEVEL_PERCENT     0.05f
 414
 415 // need this, or ai's tend to totally eliminate engine power!
 416 #define MIN_ENGINE_RECHARGE_INDEX       3
 417
 418 #define DEFAULT_CHARGE_INDEX                    4
 419 #define NORMAL_TOLERANCE_PERCENT                .10f
 420
 421 void ai_manage_ets(object* obj)
 422 {
 423         ship* ship_p = &Ships[obj->instance];
 424         ship_info* ship_info_p = &Ship_info[ship_p->ship_info_index];
 425
 426         if ( ship_info_p->power_output == 0 )
 427                 return;
 428
 429         if (ship_p->flags & SF_DYING)
 430                 return;
 431
 432         // check if any of the three systems are not being used.  If so, don't allow energy management.
 433         if ( !ship_info_p->shields || !ship_info_p->max_speed || !ship_info_p->max_weapon_reserve)
 434                 return;
 435
 436         float shield_left_percent = get_shield_strength(obj)/ship_info_p->shields;
 437         float weapon_left_percent = ship_p->weapon_energy/ship_info_p->max_weapon_reserve;
 438
 439         // maximum level check
 440         //      MK, changed these, might as well let them go up to 100% if nothing else needs the recharge ability.
 441         if ( weapon_left_percent == 1.0f) {
 442                 decrease_recharge_rate(obj, WEAPONS);
 443         }
 444
 445         if (!(obj->flags & OF_NO_SHIELDS) && (shield_left_percent == 1.0f)) {
 446                 decrease_recharge_rate(obj, SHIELDS);
 447         }
 448
 449         // minimum check
 450
 451         if (!(obj->flags & OF_NO_SHIELDS) && (shield_left_percent < SHIELDS_MIN_LEVEL_PERCENT)) {
 452                 if ( weapon_left_percent > WEAPONS_MIN_LEVEL_PERCENT )
 453                         increase_recharge_rate(obj, SHIELDS);
 454         }
 455
 456         if ( weapon_left_percent < WEAPONS_MIN_LEVEL_PERCENT ) {
 457                 increase_recharge_rate(obj, WEAPONS);
 458         }
 459
 460         if ( ship_p->engine_recharge_index < MIN_ENGINE_RECHARGE_INDEX ) {
 461                 increase_recharge_rate(obj, ENGINES);
 462         }
 463
 464         // emergency check
 465         if (!(obj->flags & OF_NO_SHIELDS)) {
 466                 if ( shield_left_percent < SHIELDS_EMERG_LEVEL_PERCENT ) {
 467                         if (ship_p->target_shields_delta == 0.0f)
 468                                 transfer_energy_to_shields(obj);
 469                 } else if ( weapon_left_percent < WEAPONS_EMERG_LEVEL_PERCENT ) {
 470                         if ( shield_left_percent > SHIELDS_MIN_LEVEL_PERCENT || weapon_left_percent <= 0.01 )   // dampen ai enthusiasm for sucking energy to weapons
 471                                 transfer_energy_to_weapons(obj);
 472                 }
 473
 474
 475                 // check for return to normal values
 476                 if ( fl_abs( shield_left_percent - 0.5f ) < NORMAL_TOLERANCE_PERCENT ) {
 477                         if ( ship_p->shield_recharge_index > DEFAULT_CHARGE_INDEX )
 478                                 decrease_recharge_rate(obj, SHIELDS);
 479                         else if ( ship_p->shield_recharge_index < DEFAULT_CHARGE_INDEX )
 480                                 increase_recharge_rate(obj, SHIELDS);
 481                 }
 482         }
 483
 484
 485         if ( fl_abs( weapon_left_percent - 0.5f ) < NORMAL_TOLERANCE_PERCENT ) {
 486                 if ( ship_p->weapon_recharge_index > DEFAULT_CHARGE_INDEX )
 487                         decrease_recharge_rate(obj, WEAPONS);
 488                 else if ( ship_p->weapon_recharge_index < DEFAULT_CHARGE_INDEX )
 489                         increase_recharge_rate(obj, WEAPONS);
 490         }
 491 }
 492
 493 // -------------------------------------------------------------------------------------------------
 494 // hud_show_ets() will display the charge rates for the three systems, and the reserve
 495 // energy for shields and weapons.  hud_show_ets() is called once per frame.
 496 //
 497 void hud_show_ets()
 498 {
 499         int i, j, index, y_start, y_end, clip_h, w, h, x, y;
 500
 501         ship* ship_p = &Ships[Player_obj->instance];
 502
 503         if ( Ets_gauge.first_frame < 0 ) {
 504                 return;
 505         }
 506
 507         hud_set_gauge_color(HUD_ETS_GAUGE);
 508
 509         // draw the letters for the gauges first, before any clipping occurs
 510         i = 0;
 511         for ( j = 0; j < 3; j++ ) {
 512                 if ( j == 1 && Player_obj->flags & OF_NO_SHIELDS ) {
 513                         continue;
 514                 }
 515                 Assert(Ets_gauge_info != NULL);
 516                 gr_printf(Ets_gauge_info[i].letter_coords[0], Ets_gauge_info[i].letter_coords[1], NOX("%c"), Ets_gauge_info[j].letter);
 517                 i++;
 518         }
 519
 520         // draw the three energy gauges
 521         i = 0;
 522         index = 0;
 523         for ( j = 0; j < 3; j++ ) {
 524                 switch (j) {
 525                 case 0:
 526                         index = ship_p->weapon_recharge_index;
 527                         break;
 528                 case 1:
 529                         index = ship_p->shield_recharge_index;
 530                         if ( Player_obj->flags & OF_NO_SHIELDS ) {
 531                                 continue;
 532                         }
 533                         break;
 534                 case 2:
 535                         index = ship_p->engine_recharge_index;
 536                         break;
 537                 }
 538
 539                 clip_h = fl2i( (1 - Energy_levels[index]) * ETS_bar_h[gr_screen.res] );
 540
 541                 bm_get_info(Ets_gauge.first_frame,&w,&h);
 542
 543                 if ( index < NUM_ENERGY_LEVELS-1 ) {
 544                         // some portion of dark needs to be drawn
 545
 546                         hud_set_gauge_color(HUD_ETS_GAUGE);
 547
 548                         // draw the top portion
 549
 550                         Assert(Ets_gauge_info != NULL);
 551                         x = Ets_gauge_info[i].top_coords[0];
 552                         y = Ets_gauge_info[i].top_coords[1];
 553
 554                         GR_AABITMAP_EX(Ets_gauge.first_frame,x,y,w,clip_h,0,0);
 555
 556                         // draw the bottom portion
 557                         Assert(Ets_gauge_info != NULL);
 558                         x = Ets_gauge_info[i].bottom_coords[0];
 559                         y = Ets_gauge_info[i].bottom_coords[1];
 560
 561                         y_start = y + (ETS_bar_h[gr_screen.res] - clip_h);
 562                         y_end = y + ETS_bar_h[gr_screen.res];
 563
 564                         GR_AABITMAP_EX(Ets_gauge.first_frame, x, y_start, w, y_end-y_start, 0, ETS_bar_h[gr_screen.res]-clip_h);
 565                 }
 566
 567                 if ( index > 0 ) {
 568                         if ( hud_gauge_maybe_flash(HUD_ETS_GAUGE) == 1 ) {
 569                                 hud_set_gauge_color(HUD_ETS_GAUGE, HUD_C_DIM);
 570                                 // hud_set_dim_color();
 571                         } else {
 572                                 hud_set_gauge_color(HUD_ETS_GAUGE, HUD_C_BRIGHT);
 573                                 // hud_set_bright_color();
 574                         }
 575                         // some portion of recharge needs to be drawn
 576
 577                         // draw the top portion
 578                         Assert(Ets_gauge_info != NULL);
 579                         x = Ets_gauge_info[i].top_coords[0];
 580                         y = Ets_gauge_info[i].top_coords[1];
 581
 582                         y_start = y + clip_h;
 583                         y_end = y + ETS_bar_h[gr_screen.res];
 584
 585                         GR_AABITMAP_EX(Ets_gauge.first_frame+1, x, y_start, w, y_end-y_start, 0, clip_h);
 586
 587                         // draw the bottom portion
 588                         Assert(Ets_gauge_info != NULL);
 589                         x = Ets_gauge_info[i].bottom_coords[0];
 590                         y = Ets_gauge_info[i].bottom_coords[1];
 591
 592                         GR_AABITMAP_EX(Ets_gauge.first_frame+2, x,y,w,ETS_bar_h[gr_screen.res]-clip_h,0,0);
 593                 }
 594                 i++;
 595         }
 596
 597         // hud_set_default_color();
 598 }
 599
 600 // -------------------------------------------------------------------------------------------------
 601 // set_default_recharge_rates() will set the charge levels for the weapons, shields and
 602 // engines to their default levels
 603 void set_default_recharge_rates(object* obj)
 604 {
 605         int ship_properties;
 606
 607         ship* ship_p = &Ships[obj->instance];
 608         ship_info* ship_info_p = &Ship_info[ship_p->ship_info_index];
 609
 610         if ( ship_info_p->power_output == 0 )
 611                 return;
 612
 613         ship_properties = 0;
 614         if ( ship_info_p->max_weapon_reserve )
 615                 ship_properties |= HAS_WEAPONS;
 616
 617         if (!(obj->flags & OF_NO_SHIELDS))
 618                 ship_properties |= HAS_SHIELDS;
 619
 620         if ( ship_info_p->max_speed )
 621                 ship_properties |= HAS_ENGINES;
 622
 623         // the default charge rate depends on what systems are on each ship
 624         switch ( ship_properties ) {
 625                 case HAS_ENGINES | HAS_WEAPONS | HAS_SHIELDS:
 626                         ship_p->shield_recharge_index = INTIAL_SHIELD_RECHARGE_INDEX;
 627                         ship_p->weapon_recharge_index = INTIAL_WEAPON_RECHARGE_INDEX;
 628                         ship_p->engine_recharge_index = INTIAL_ENGINE_RECHARGE_INDEX;
 629                         break;
 630
 631                 case HAS_ENGINES | HAS_SHIELDS:
 632                         ship_p->shield_recharge_index = ONE_HALF_INDEX;
 633                         ship_p->weapon_recharge_index = ZERO_INDEX;
 634                         ship_p->engine_recharge_index = ONE_HALF_INDEX;
 635                         break;
 636
 637                 case HAS_WEAPONS | HAS_SHIELDS:
 638                         ship_p->shield_recharge_index = ONE_HALF_INDEX;
 639                         ship_p->weapon_recharge_index = ONE_HALF_INDEX;
 640                         ship_p->engine_recharge_index = ZERO_INDEX;
 641                         break;
 642
 643                 case HAS_ENGINES | HAS_WEAPONS:
 644                         ship_p->shield_recharge_index = ZERO_INDEX;
 645                         ship_p->weapon_recharge_index = ONE_HALF_INDEX;
 646                         ship_p->engine_recharge_index = ONE_HALF_INDEX;
 647                         break;
 648
 649                 case HAS_SHIELDS:
 650                         ship_p->shield_recharge_index = ALL_INDEX;
 651                         ship_p->weapon_recharge_index = ZERO_INDEX;
 652                         ship_p->engine_recharge_index = ZERO_INDEX;
 653                         break;
 654
 655                 case HAS_ENGINES:
 656                         ship_p->shield_recharge_index = ZERO_INDEX;
 657                         ship_p->weapon_recharge_index = ZERO_INDEX;
 658                         ship_p->engine_recharge_index = ALL_INDEX;
 659                         break;
 660
 661                 case HAS_WEAPONS:
 662                         ship_p->shield_recharge_index = ZERO_INDEX;
 663                         ship_p->weapon_recharge_index = ALL_INDEX;
 664                         ship_p->engine_recharge_index = ZERO_INDEX;
 665                         break;
 666
 667                 default:
 668                         Int3(); // if no systems, power output should be zero, and this funtion shouldn't be called
 669                         break;
 670         } // end switch
 671 }
 672
 673 // -------------------------------------------------------------------------------------------------
 674 // increase_recharge_rate() will increase the energy flow to the specified system (one of
 675 // WEAPONS, SHIELDS or ENGINES).  The increase in energy will result in a decrease to
 676 // the other two systems.
 677 void increase_recharge_rate(object* obj, SYSTEM_TYPE ship_system)
 678 {
 679         int     *gain_index=NULL, *lose_index1=NULL, *lose_index2=NULL, *tmp=NULL;
 680         int     count=0;
 681         ship    *ship_p = &Ships[obj->instance];
 682
 683         switch ( ship_system ) {
 684                 case WEAPONS:
 685                         gain_index = &ship_p->weapon_recharge_index;
 686                         lose_index1 = &ship_p->engine_recharge_index;
 687                         if ( obj->flags & OF_NO_SHIELDS ) {
 688                                 lose_index2 = NULL;
 689                         } else {
 690                                 lose_index2 = &ship_p->shield_recharge_index;
 691                         }
 692                         break;
 693
 694                 case SHIELDS:
 695                         if ( obj->flags & OF_NO_SHIELDS ) {
 696                                 return;
 697                         }
 698                         gain_index = &ship_p->shield_recharge_index;
 699                         lose_index1 = &ship_p->weapon_recharge_index;
 700                         lose_index2 = &ship_p->engine_recharge_index;
 701                         break;
 702
 703                 case ENGINES:
 704                         gain_index = &ship_p->engine_recharge_index;
 705                         lose_index1 = &ship_p->weapon_recharge_index;
 706                         if ( obj->flags & OF_NO_SHIELDS ) {
 707                                 lose_index2 = NULL;
 708                         } else {
 709                                 lose_index2 = &ship_p->shield_recharge_index;
 710                         }
 711                         break;
 712
 713         } // end switch
 714
 715         // already full, nothing to do
 716         count = MAX_ENERGY_INDEX - *gain_index;
 717         if ( count > 2 )
 718                 count = 2;
 719
 720         if ( count <= 0 ) {
 721                 if ( obj == Player_obj ) {
 722                         snd_play( &Snds[SND_ENERGY_TRANS_FAIL], 0.0f );
 723                 }
 724                 return;
 725         }
 726
 727         *gain_index += count;
 728
 729         // ensure that the highest lose index takes the first decrease
 730         if ( lose_index1 && lose_index2 ) {
 731                 if ( *lose_index1 < *lose_index2 ) {
 732                         tmp = lose_index1;
 733                         lose_index1 = lose_index2;
 734                         lose_index2 = tmp;
 735                 }
 736         }
 737
 738         int sanity = 0;
 739         while(count > 0) {
 740                 if ( lose_index1 && *lose_index1 > 0 ) {
 741                         *lose_index1 -= 1;
 742                         count--;
 743                 }
 744
 745                 if ( count <= 0 )
 746                         break;
 747
 748                 if ( lose_index2 && *lose_index2 > 0 ) {
 749                         *lose_index2 -= 1;
 750                         count--;
 751                 }
 752
 753                 if ( sanity++ > 10 ) {
 754                         Int3(); // get Alan
 755                         break;
 756                 }
 757         }
 758
 759         if ( obj == Player_obj )
 760                 snd_play( &Snds[SND_ENERGY_TRANS], 0.0f );
 761 }
 762
 763 // -------------------------------------------------------------------------------------------------
 764 // decrease_recharge_rate() will decrease the energy flow to the specified system (one of
 765 // WEAPONS, SHIELDS or ENGINES).  The decrease in energy will result in an increase to
 766 // the other two systems.
 767 void decrease_recharge_rate(object* obj, SYSTEM_TYPE ship_system)
 768 {
 769         int     *lose_index=NULL, *gain_index1=NULL, *gain_index2=NULL, *tmp=NULL;
 770         int     count;
 771         ship    *ship_p = &Ships[obj->instance];
 772
 773         switch ( ship_system ) {
 774                 case WEAPONS:
 775                         lose_index = &ship_p->weapon_recharge_index;
 776
 777                         if ( obj->flags & OF_NO_SHIELDS ) {
 778                                 gain_index1 = NULL;
 779                         } else {
 780                                 gain_index1 = &ship_p->shield_recharge_index;
 781                         }
 782
 783                         gain_index2 = &ship_p->engine_recharge_index;
 784                         break;
 785
 786                 case SHIELDS:
 787                         if ( obj->flags & OF_NO_SHIELDS ) {
 788                                 return;
 789                         }
 790                         lose_index = &ship_p->shield_recharge_index;
 791                         gain_index1 = &ship_p->weapon_recharge_index;
 792                         gain_index2 = &ship_p->engine_recharge_index;
 793                         break;
 794
 795                 case ENGINES:
 796                         lose_index = &ship_p->engine_recharge_index;
 797
 798                         if ( obj->flags & OF_NO_SHIELDS ) {
 799                                 gain_index1 = NULL;
 800                         } else {
 801                                 gain_index1 = &ship_p->shield_recharge_index;
 802                         }
 803
 804                         gain_index2 = &ship_p->weapon_recharge_index;
 805                         break;
 806         } // end switch
 807
 808         // check how much there is to lose
 809         count = min(2, *lose_index);
 810         if ( count <= 0 ) {
 811                 if ( obj == Player_obj ) {
 812                         snd_play( &Snds[SND_ENERGY_TRANS_FAIL], 0.0f );
 813                 }
 814                 return;
 815         }
 816
 817         *lose_index -= count;
 818
 819         // make sure that the gain starts with the system which needs it most
 820         if ( gain_index1 && gain_index2 ) {
 821                 if ( *gain_index1 > *gain_index2 ) {
 822                         tmp = gain_index1;
 823                         gain_index1 = gain_index2;
 824                         gain_index2 = tmp;
 825                 }
 826         }
 827
 828         int sanity=0;
 829         while(count > 0) {
 830                 if ( gain_index1 && *gain_index1 < MAX_ENERGY_INDEX ) {
 831                         *gain_index1 += 1;
 832                         count--;
 833                 }
 834
 835                 if ( count <= 0 )
 836                         break;
 837
 838                 if ( gain_index2 && *gain_index2 < MAX_ENERGY_INDEX ) {
 839                         *gain_index2 += 1;
 840                         count--;
 841                 }
 842
 843                 if ( sanity++ > 10 ) {
 844                         Int3(); // get Alan
 845                         break;
 846                 }
 847         }
 848
 849         if ( obj == Player_obj )
 850                 snd_play( &Snds[SND_ENERGY_TRANS], 0.0f );
 851 }
 852
 853 void transfer_energy_weapon_common(object *objp, float from_field, float to_field, float *from_delta, float *to_delta, float max, float scale)
 854 {
 855         float   delta;
 856
 857         delta = from_field * ENERGY_DIVERT_DELTA * scale;
 858
 859         if (to_field + *to_delta + delta > max)
 860                 delta = max - to_field - *to_delta;
 861
 862         if ( delta > 0 ) {
 863                 if ( objp == Player_obj )
 864                         snd_play( &Snds[SND_ENERGY_TRANS], 0.0f );
 865
 866                 if (delta > from_field)
 867                         delta = from_field;
 868
 869                 *to_delta += delta;
 870                 *from_delta -= delta;
 871         } else
 872                 if ( objp == Player_obj )
 873                         snd_play( &Snds[SND_ENERGY_TRANS_FAIL], 0.0f );
 874 }
 875
 876 // -------------------------------------------------------------------------------------------------
 877 // transfer_energy_to_shields() will transfer ENERGY_DIVERT_DELTA percent of weapon energy
 878 // to shield energy.
 879 void transfer_energy_to_shields(object* obj)
 880 {
 881         ship*                   ship_p = &Ships[obj->instance];
 882         ship_info*      sinfo_p = &Ship_info[ship_p->ship_info_index];
 883
 884         if (ship_p->flags & SF_DYING)
 885                 return;
 886
 887         if ( obj->flags & OF_NO_SHIELDS ) {
 888                 return;
 889         }
 890
 891         transfer_energy_weapon_common(obj, ship_p->weapon_energy, get_shield_strength(obj), &ship_p->target_weapon_energy_delta, &ship_p->target_shields_delta, sinfo_p->shields, 0.5f);
 892 }
 893
 894 // -------------------------------------------------------------------------------------------------
 895 // transfer_energy_to_weapons() will transfer ENERGY_DIVERT_DELTA percent of shield energy
 896 // to weapon energy.
 897 void transfer_energy_to_weapons(object* obj)
 898 {
 899         ship*                   ship_p = &Ships[obj->instance];
 900         ship_info*      sinfo_p = &Ship_info[ship_p->ship_info_index];
 901
 902         if (ship_p->flags & SF_DYING)
 903                 return;
 904
 905         transfer_energy_weapon_common(obj, get_shield_strength(obj), ship_p->weapon_energy, &ship_p->target_shields_delta, &ship_p->target_weapon_energy_delta, sinfo_p->max_weapon_reserve, 1.0f);
 906 }
 907
 908 void hudets_page_in()
 909 {
 910         bm_page_in_aabitmap( Ets_gauge.first_frame, Ets_gauge.num_frames );
 911 }
 912