view.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // view.c -- player eye positioning
  21
  22 #include "quakedef.h"
  23 #include "cl_collision.h"
  24
  25 void CL_VM_UpdateDmgGlobals (int dmg_take, int dmg_save, vec3_t dmg_origin);
  26
  27 /*
  28
  29 The view is allowed to move slightly from it's true position for bobbing,
  30 but if it exceeds 8 pixels linear distance (spherical, not box), the list of
  31 entities sent from the server may not include everything in the pvs, especially
  32 when crossing a water boudnary.
  33
  34 */
  35
  36 cvar_t cl_rollspeed = {0, "cl_rollspeed", "200", "how much strafing is necessary to tilt the view"};
  37 cvar_t cl_rollangle = {0, "cl_rollangle", "2.0", "how much to tilt the view when strafing"};
  38
  39 cvar_t cl_bob = {CVAR_SAVE, "cl_bob","0.02", "view bobbing amount"};
  40 cvar_t cl_bobcycle = {CVAR_SAVE, "cl_bobcycle","0.6", "view bobbing speed"};
  41 cvar_t cl_bobup = {CVAR_SAVE, "cl_bobup","0.5", "view bobbing adjustment that makes the up or down swing of the bob last longer"};
  42 cvar_t cl_bobroll = {CVAR_SAVE, "cl_bobroll","1", "view rolling amount"};
  43 cvar_t cl_bobrollcycle = {CVAR_SAVE, "cl_bobrollcycle","0.5", "view rolling speed"};
  44 cvar_t cl_bobrollup = {CVAR_SAVE, "cl_bobrollup","0.01", "view bobbing adjustment that makes the up or down swing of the roll last longer"};
  45 cvar_t cl_bobrollairtime = {CVAR_SAVE, "cl_bobrollairtime","0.05", "how fast the view rolls back when you stop touching the ground"};
  46 cvar_t cl_bobmodel = {CVAR_SAVE, "cl_bobmodel", "1", "enables gun bobbing"};
  47 cvar_t cl_bobmodel_side = {CVAR_SAVE, "cl_bobmodel_side", "0.15", "gun bobbing sideways sway amount"};
  48 cvar_t cl_bobmodel_up = {CVAR_SAVE, "cl_bobmodel_up", "0.06", "gun bobbing upward movement amount"};
  49 cvar_t cl_bobmodel_speed = {CVAR_SAVE, "cl_bobmodel_speed", "7", "gun bobbing speed"};
  50
  51 cvar_t cl_leanmodel = {CVAR_SAVE, "cl_leanmodel", "0", "enables gun leaning"};
  52 cvar_t cl_leanmodel_side_speed = {CVAR_SAVE, "cl_leanmodel_side_speed", "0.7", "gun leaning sideways speed"};
  53 cvar_t cl_leanmodel_side_limit = {CVAR_SAVE, "cl_leanmodel_side_limit", "35", "gun leaning sideways limit"};
  54 cvar_t cl_leanmodel_side_highpass1 = {CVAR_SAVE, "cl_leanmodel_side_highpass1", "30", "gun leaning sideways pre-highpass in 1/s"};
  55 cvar_t cl_leanmodel_side_highpass = {CVAR_SAVE, "cl_leanmodel_side_highpass", "5", "gun leaning sideways highpass in 1/s"};
  56 cvar_t cl_leanmodel_side_lowpass = {CVAR_SAVE, "cl_leanmodel_side_lowpass", "30", "gun leaning sideways lowpass in 1/s"};
  57 cvar_t cl_leanmodel_up_speed = {CVAR_SAVE, "cl_leanmodel_up_speed", "0.65", "gun leaning upward speed"};
  58 cvar_t cl_leanmodel_up_limit = {CVAR_SAVE, "cl_leanmodel_up_limit", "50", "gun leaning upward limit"};
  59 cvar_t cl_leanmodel_up_highpass1 = {CVAR_SAVE, "cl_leanmodel_up_highpass1", "5", "gun leaning upward pre-highpass in 1/s"};
  60 cvar_t cl_leanmodel_up_highpass = {CVAR_SAVE, "cl_leanmodel_up_highpass", "15", "gun leaning upward highpass in 1/s"};
  61 cvar_t cl_leanmodel_up_lowpass = {CVAR_SAVE, "cl_leanmodel_up_lowpass", "30", "gun leaning upward lowpass in 1/s"};
  62
  63 cvar_t cl_followmodel = {CVAR_SAVE, "cl_followmodel", "0", "enables gun following"};
  64 cvar_t cl_followmodel_side_speed = {CVAR_SAVE, "cl_followmodel_side_speed", "0.25", "gun following sideways speed"};
  65 cvar_t cl_followmodel_side_limit = {CVAR_SAVE, "cl_followmodel_side_limit", "6", "gun following sideways limit"};
  66 cvar_t cl_followmodel_side_highpass1 = {CVAR_SAVE, "cl_followmodel_side_highpass1", "30", "gun following sideways pre-highpass in 1/s"};
  67 cvar_t cl_followmodel_side_highpass = {CVAR_SAVE, "cl_followmodel_side_highpass", "5", "gun following sideways highpass in 1/s"};
  68 cvar_t cl_followmodel_side_lowpass = {CVAR_SAVE, "cl_followmodel_side_lowpass", "30", "gun following sideways lowpass in 1/s"};
  69 cvar_t cl_followmodel_up_speed = {CVAR_SAVE, "cl_followmodel_up_speed", "0.5", "gun following upward speed"};
  70 cvar_t cl_followmodel_up_limit = {CVAR_SAVE, "cl_followmodel_up_limit", "5", "gun following upward limit"};
  71 cvar_t cl_followmodel_up_highpass1 = {CVAR_SAVE, "cl_followmodel_up_highpass1", "60", "gun following upward pre-highpass in 1/s"};
  72 cvar_t cl_followmodel_up_highpass = {CVAR_SAVE, "cl_followmodel_up_highpass", "3", "gun following upward highpass in 1/s"};
  73 cvar_t cl_followmodel_up_lowpass = {CVAR_SAVE, "cl_followmodel_up_lowpass", "30", "gun following upward lowpass in 1/s"};
  74
  75 cvar_t cl_viewmodel_scale = {0, "cl_viewmodel_scale", "1", "changes size of gun model, lower values prevent poking into walls but cause strange artifacts on lighting and especially r_stereo/vid_stereobuffer options where the size of the gun becomes visible"};
  76
  77 cvar_t v_kicktime = {0, "v_kicktime", "0.5", "how long a view kick from damage lasts"};
  78 cvar_t v_kickroll = {0, "v_kickroll", "0.6", "how much a view kick from damage rolls your view"};
  79 cvar_t v_kickpitch = {0, "v_kickpitch", "0.6", "how much a view kick from damage pitches your view"};
  80
  81 cvar_t v_iyaw_cycle = {0, "v_iyaw_cycle", "2", "v_idlescale yaw speed"};
  82 cvar_t v_iroll_cycle = {0, "v_iroll_cycle", "0.5", "v_idlescale roll speed"};
  83 cvar_t v_ipitch_cycle = {0, "v_ipitch_cycle", "1", "v_idlescale pitch speed"};
  84 cvar_t v_iyaw_level = {0, "v_iyaw_level", "0.3", "v_idlescale yaw amount"};
  85 cvar_t v_iroll_level = {0, "v_iroll_level", "0.1", "v_idlescale roll amount"};
  86 cvar_t v_ipitch_level = {0, "v_ipitch_level", "0.3", "v_idlescale pitch amount"};
  87
  88 cvar_t v_idlescale = {0, "v_idlescale", "0", "how much of the quake 'drunken view' effect to use"};
  89
  90 cvar_t crosshair = {CVAR_SAVE, "crosshair", "0", "selects crosshair to use (0 is none)"};
  91
  92 cvar_t v_centermove = {0, "v_centermove", "0.15", "how long before the view begins to center itself (if freelook/+mlook/+jlook/+klook are off)"};
  93 cvar_t v_centerspeed = {0, "v_centerspeed","500", "how fast the view centers itself"};
  94
  95 cvar_t cl_stairsmoothspeed = {CVAR_SAVE, "cl_stairsmoothspeed", "160", "how fast your view moves upward/downward when running up/down stairs"};
  96
  97 cvar_t chase_back = {CVAR_SAVE, "chase_back", "48", "chase cam distance from the player"};
  98 cvar_t chase_up = {CVAR_SAVE, "chase_up", "24", "chase cam distance from the player"};
  99 cvar_t chase_active = {CVAR_SAVE, "chase_active", "0", "enables chase cam"};
 100 cvar_t chase_overhead = {CVAR_SAVE, "chase_overhead", "0", "chase cam looks straight down if this is not zero"};
 101 // GAME_GOODVSBAD2
 102 cvar_t chase_stevie = {0, "chase_stevie", "0", "chase cam view from above (used only by GoodVsBad2)"};
 103
 104 cvar_t v_deathtilt = {0, "v_deathtilt", "1", "whether to use sideways view when dead"};
 105 cvar_t v_deathtiltangle = {0, "v_deathtiltangle", "80", "what roll angle to use when tilting the view while dead"};
 106
 107 // Prophecy camera pitchangle by Alexander "motorsep" Zubov
 108 cvar_t chase_pitchangle = {CVAR_SAVE, "chase_pitchangle", "55", "chase cam pitch angle"};
 109
 110 float   v_dmg_time, v_dmg_roll, v_dmg_pitch;
 111
 112
 113 /*
 114 ===============
 115 V_CalcRoll
 116
 117 Used by view and sv_user
 118 ===============
 119 */
 120 float V_CalcRoll (vec3_t angles, vec3_t velocity)
 121 {
 122         vec3_t  right;
 123         float   sign;
 124         float   side;
 125         float   value;
 126
 127         AngleVectors (angles, NULL, right, NULL);
 128         side = DotProduct (velocity, right);
 129         sign = side < 0 ? -1 : 1;
 130         side = fabs(side);
 131
 132         value = cl_rollangle.value;
 133
 134         if (side < cl_rollspeed.value)
 135                 side = side * value / cl_rollspeed.value;
 136         else
 137                 side = value;
 138
 139         return side*sign;
 140
 141 }
 142
 143 void V_StartPitchDrift (void)
 144 {
 145         if (cl.laststop == cl.time)
 146                 return;         // something else is keeping it from drifting
 147
 148         if (cl.nodrift || !cl.pitchvel)
 149         {
 150                 cl.pitchvel = v_centerspeed.value;
 151                 cl.nodrift = false;
 152                 cl.driftmove = 0;
 153         }
 154 }
 155
 156 void V_StopPitchDrift (void)
 157 {
 158         cl.laststop = cl.time;
 159         cl.nodrift = true;
 160         cl.pitchvel = 0;
 161 }
 162
 163 /*
 164 ===============
 165 V_DriftPitch
 166
 167 Moves the client pitch angle towards cl.idealpitch sent by the server.
 168
 169 If the user is adjusting pitch manually, either with lookup/lookdown,
 170 mlook and mouse, or klook and keyboard, pitch drifting is constantly stopped.
 171
 172 Drifting is enabled when the center view key is hit, mlook is released and
 173 lookspring is non 0, or when
 174 ===============
 175 */
 176 void V_DriftPitch (void)
 177 {
 178         float           delta, move;
 179
 180         if (noclip_anglehack || !cl.onground || cls.demoplayback )
 181         {
 182                 cl.driftmove = 0;
 183                 cl.pitchvel = 0;
 184                 return;
 185         }
 186
 187 // don't count small mouse motion
 188         if (cl.nodrift)
 189         {
 190                 if ( fabs(cl.cmd.forwardmove) < cl_forwardspeed.value)
 191                         cl.driftmove = 0;
 192                 else
 193                         cl.driftmove += cl.realframetime;
 194
 195                 if ( cl.driftmove > v_centermove.value)
 196                 {
 197                         V_StartPitchDrift ();
 198                 }
 199                 return;
 200         }
 201
 202         delta = cl.idealpitch - cl.viewangles[PITCH];
 203
 204         if (!delta)
 205         {
 206                 cl.pitchvel = 0;
 207                 return;
 208         }
 209
 210         move = cl.realframetime * cl.pitchvel;
 211         cl.pitchvel += cl.realframetime * v_centerspeed.value;
 212
 213         if (delta > 0)
 214         {
 215                 if (move > delta)
 216                 {
 217                         cl.pitchvel = 0;
 218                         move = delta;
 219                 }
 220                 cl.viewangles[PITCH] += move;
 221         }
 222         else if (delta < 0)
 223         {
 224                 if (move > -delta)
 225                 {
 226                         cl.pitchvel = 0;
 227                         move = -delta;
 228                 }
 229                 cl.viewangles[PITCH] -= move;
 230         }
 231 }
 232
 233
 234 /*
 235 ==============================================================================
 236
 237                                                 SCREEN FLASHES
 238
 239 ==============================================================================
 240 */
 241
 242
 243 /*
 244 ===============
 245 V_ParseDamage
 246 ===============
 247 */
 248 void V_ParseDamage (void)
 249 {
 250         int armor, blood;
 251         vec3_t from;
 252         //vec3_t forward, right;
 253         vec3_t localfrom;
 254         entity_t *ent;
 255         //float side;
 256         float count;
 257
 258         armor = MSG_ReadByte ();
 259         blood = MSG_ReadByte ();
 260         MSG_ReadVector(from, cls.protocol);
 261
 262         // Send the Dmg Globals to CSQC
 263         CL_VM_UpdateDmgGlobals(blood, armor, from);
 264
 265         count = blood*0.5 + armor*0.5;
 266         if (count < 10)
 267                 count = 10;
 268
 269         cl.faceanimtime = cl.time + 0.2;                // put sbar face into pain frame
 270
 271         cl.cshifts[CSHIFT_DAMAGE].percent += 3*count;
 272         cl.cshifts[CSHIFT_DAMAGE].alphafade = 150;
 273         if (cl.cshifts[CSHIFT_DAMAGE].percent < 0)
 274                 cl.cshifts[CSHIFT_DAMAGE].percent = 0;
 275         if (cl.cshifts[CSHIFT_DAMAGE].percent > 150)
 276                 cl.cshifts[CSHIFT_DAMAGE].percent = 150;
 277
 278         if (armor > blood)
 279         {
 280                 cl.cshifts[CSHIFT_DAMAGE].destcolor[0] = 200;
 281                 cl.cshifts[CSHIFT_DAMAGE].destcolor[1] = 100;
 282                 cl.cshifts[CSHIFT_DAMAGE].destcolor[2] = 100;
 283         }
 284         else if (armor)
 285         {
 286                 cl.cshifts[CSHIFT_DAMAGE].destcolor[0] = 220;
 287                 cl.cshifts[CSHIFT_DAMAGE].destcolor[1] = 50;
 288                 cl.cshifts[CSHIFT_DAMAGE].destcolor[2] = 50;
 289         }
 290         else
 291         {
 292                 cl.cshifts[CSHIFT_DAMAGE].destcolor[0] = 255;
 293                 cl.cshifts[CSHIFT_DAMAGE].destcolor[1] = 0;
 294                 cl.cshifts[CSHIFT_DAMAGE].destcolor[2] = 0;
 295         }
 296
 297         // calculate view angle kicks
 298         if (cl.entities[cl.viewentity].state_current.active)
 299         {
 300                 ent = &cl.entities[cl.viewentity];
 301                 Matrix4x4_Transform(&ent->render.inversematrix, from, localfrom);
 302                 VectorNormalize(localfrom);
 303                 v_dmg_pitch = count * localfrom[0] * v_kickpitch.value;
 304                 v_dmg_roll = count * localfrom[1] * v_kickroll.value;
 305                 v_dmg_time = v_kicktime.value;
 306         }
 307 }
 308
 309 static cshift_t v_cshift;
 310
 311 /*
 312 ==================
 313 V_cshift_f
 314 ==================
 315 */
 316 static void V_cshift_f (void)
 317 {
 318         v_cshift.destcolor[0] = atof(Cmd_Argv(1));
 319         v_cshift.destcolor[1] = atof(Cmd_Argv(2));
 320         v_cshift.destcolor[2] = atof(Cmd_Argv(3));
 321         v_cshift.percent = atof(Cmd_Argv(4));
 322 }
 323
 324
 325 /*
 326 ==================
 327 V_BonusFlash_f
 328
 329 When you run over an item, the server sends this command
 330 ==================
 331 */
 332 static void V_BonusFlash_f (void)
 333 {
 334         if(Cmd_Argc() == 1)
 335         {
 336                 cl.cshifts[CSHIFT_BONUS].destcolor[0] = 215;
 337                 cl.cshifts[CSHIFT_BONUS].destcolor[1] = 186;
 338                 cl.cshifts[CSHIFT_BONUS].destcolor[2] = 69;
 339                 cl.cshifts[CSHIFT_BONUS].percent = 50;
 340                 cl.cshifts[CSHIFT_BONUS].alphafade = 100;
 341         }
 342         else if(Cmd_Argc() >= 4 && Cmd_Argc() <= 6)
 343         {
 344                 cl.cshifts[CSHIFT_BONUS].destcolor[0] = atof(Cmd_Argv(1)) * 255;
 345                 cl.cshifts[CSHIFT_BONUS].destcolor[1] = atof(Cmd_Argv(2)) * 255;
 346                 cl.cshifts[CSHIFT_BONUS].destcolor[2] = atof(Cmd_Argv(3)) * 255;
 347                 if(Cmd_Argc() >= 5)
 348                         cl.cshifts[CSHIFT_BONUS].percent = atof(Cmd_Argv(4)) * 255; // yes, these are HEXADECIMAL percent ;)
 349                 else
 350                         cl.cshifts[CSHIFT_BONUS].percent = 50;
 351                 if(Cmd_Argc() >= 6)
 352                         cl.cshifts[CSHIFT_BONUS].alphafade = atof(Cmd_Argv(5)) * 255;
 353                 else
 354                         cl.cshifts[CSHIFT_BONUS].alphafade = 100;
 355         }
 356         else
 357                 Con_Printf("usage:\nbf, or bf R G B [A [alphafade]]\n");
 358 }
 359
 360 /*
 361 ==============================================================================
 362
 363                                                 VIEW RENDERING
 364
 365 ==============================================================================
 366 */
 367
 368 extern matrix4x4_t viewmodelmatrix;
 369
 370 #include "cl_collision.h"
 371 #include "csprogs.h"
 372
 373 /*
 374 ==================
 375 V_CalcRefdef
 376
 377 ==================
 378 */
 379 #if 0
 380 static vec3_t eyeboxmins = {-16, -16, -24};
 381 static vec3_t eyeboxmaxs = { 16,  16,  32};
 382 #endif
 383
 384 static vec_t lowpass(vec_t value, vec_t frac, vec_t *store)
 385 {
 386         frac = bound(0, frac, 1);
 387         return (*store = *store * (1 - frac) + value * frac);
 388 }
 389
 390 static vec_t lowpass_limited(vec_t value, vec_t frac, vec_t limit, vec_t *store)
 391 {
 392         lowpass(value, frac, store);
 393         return (*store = bound(value - limit, *store, value + limit));
 394 }
 395
 396 static vec_t highpass(vec_t value, vec_t frac, vec_t *store)
 397 {
 398         return value - lowpass(value, frac, store);
 399 }
 400
 401 static vec_t highpass_limited(vec_t value, vec_t frac, vec_t limit, vec_t *store)
 402 {
 403         return value - lowpass_limited(value, frac, limit, store);
 404 }
 405
 406 static void lowpass3(vec3_t value, vec_t fracx, vec_t fracy, vec_t fracz, vec3_t store, vec3_t out)
 407 {
 408         out[0] = lowpass(value[0], fracx, &store[0]);
 409         out[1] = lowpass(value[1], fracy, &store[1]);
 410         out[2] = lowpass(value[2], fracz, &store[2]);
 411 }
 412
 413 static void highpass3(vec3_t value, vec_t fracx, vec_t fracy, vec_t fracz, vec3_t store, vec3_t out)
 414 {
 415         out[0] = highpass(value[0], fracx, &store[0]);
 416         out[1] = highpass(value[1], fracy, &store[1]);
 417         out[2] = highpass(value[2], fracz, &store[2]);
 418 }
 419
 420 static void highpass3_limited(vec3_t value, vec_t fracx, vec_t limitx, vec_t fracy, vec_t limity, vec_t fracz, vec_t limitz, vec3_t store, vec3_t out)
 421 {
 422         out[0] = highpass_limited(value[0], fracx, limitx, &store[0]);
 423         out[1] = highpass_limited(value[1], fracy, limity, &store[1]);
 424         out[2] = highpass_limited(value[2], fracz, limitz, &store[2]);
 425 }
 426
 427 void V_CalcRefdef (void)
 428 {
 429         entity_t *ent;
 430         float vieworg[3], viewangles[3], smoothtime;
 431         float gunorg[3], gunangles[3];
 432 #if 0
 433 // begin of chase camera bounding box size for proper collisions by Alexander Zubov
 434         vec3_t camboxmins = {-3, -3, -3};
 435         vec3_t camboxmaxs = {3, 3, 3};
 436 // end of chase camera bounding box size for proper collisions by Alexander Zubov
 437 #endif
 438         trace_t trace;
 439         VectorClear(gunorg);
 440         viewmodelmatrix = identitymatrix;
 441         r_refdef.view.matrix = identitymatrix;
 442         if (cls.state == ca_connected && cls.signon == SIGNONS)
 443         {
 444                 // ent is the view entity (visible when out of body)
 445                 ent = &cl.entities[cl.viewentity];
 446                 // player can look around, so take the origin from the entity,
 447                 // and the angles from the input system
 448                 Matrix4x4_OriginFromMatrix(&ent->render.matrix, vieworg);
 449                 VectorCopy(cl.viewangles, viewangles);
 450
 451                 // calculate how much time has passed since the last V_CalcRefdef
 452                 smoothtime = bound(0, cl.time - cl.stairsmoothtime, 0.1);
 453                 cl.stairsmoothtime = cl.time;
 454
 455                 // fade damage flash
 456                 if (v_dmg_time > 0)
 457                         v_dmg_time -= bound(0, smoothtime, 0.1);
 458
 459                 if (cl.intermission)
 460                 {
 461                         // entity is a fixed camera, just copy the matrix
 462                         if (cls.protocol == PROTOCOL_QUAKEWORLD)
 463                                 Matrix4x4_CreateFromQuakeEntity(&r_refdef.view.matrix, cl.qw_intermission_origin[0], cl.qw_intermission_origin[1], cl.qw_intermission_origin[2], cl.qw_intermission_angles[0], cl.qw_intermission_angles[1], cl.qw_intermission_angles[2], 1);
 464                         else
 465                         {
 466                                 r_refdef.view.matrix = ent->render.matrix;
 467                                 Matrix4x4_AdjustOrigin(&r_refdef.view.matrix, 0, 0, cl.stats[STAT_VIEWHEIGHT]);
 468                         }
 469                         viewmodelmatrix = r_refdef.view.matrix;
 470                 }
 471                 else
 472                 {
 473                         // smooth stair stepping, but only if onground and enabled
 474                         if (!cl.onground || cl_stairsmoothspeed.value <= 0 || !ent->persistent.trail_allowed) // FIXME use a better way to detect teleport/warp
 475                                 cl.stairsmoothz = vieworg[2];
 476                         else
 477                         {
 478                                 if (cl.stairsmoothz < vieworg[2])
 479                                         vieworg[2] = cl.stairsmoothz = bound(vieworg[2] - 16, cl.stairsmoothz + smoothtime * cl_stairsmoothspeed.value, vieworg[2]);
 480                                 else if (cl.stairsmoothz > vieworg[2])
 481                                         vieworg[2] = cl.stairsmoothz = bound(vieworg[2], cl.stairsmoothz - smoothtime * cl_stairsmoothspeed.value, vieworg[2] + 16);
 482                         }
 483
 484                         // apply qw weapon recoil effect (this did not work in QW)
 485                         // TODO: add a cvar to disable this
 486                         viewangles[PITCH] += cl.qw_weaponkick;
 487
 488                         // apply the viewofs (even if chasecam is used)
 489                         vieworg[2] += cl.stats[STAT_VIEWHEIGHT];
 490
 491                         if (chase_active.value)
 492                         {
 493                                 // observing entity from third person. Added "campitch" by Alexander "motorsep" Zubov
 494                                 vec_t camback, camup, dist, campitch, forward[3], chase_dest[3];
 495
 496                                 camback = chase_back.value;
 497                                 camup = chase_up.value;
 498                                 campitch = chase_pitchangle.value;
 499
 500                                 AngleVectors(viewangles, forward, NULL, NULL);
 501
 502                                 if (chase_overhead.integer)
 503                                 {
 504 #if 1
 505                                         vec3_t offset;
 506                                         vec3_t bestvieworg;
 507 #endif
 508                                         vec3_t up;
 509                                         viewangles[PITCH] = 0;
 510                                         AngleVectors(viewangles, forward, NULL, up);
 511                                         // trace a little further so it hits a surface more consistently (to avoid 'snapping' on the edge of the range)
 512                                         chase_dest[0] = vieworg[0] - forward[0] * camback + up[0] * camup;
 513                                         chase_dest[1] = vieworg[1] - forward[1] * camback + up[1] * camup;
 514                                         chase_dest[2] = vieworg[2] - forward[2] * camback + up[2] * camup;
 515 #if 0
 516 #if 1
 517                                         //trace = CL_TraceLine(vieworg, eyeboxmins, eyeboxmaxs, chase_dest, MOVE_NOMONSTERS, NULL, SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_SKY, true, false, NULL, false);
 518                                         trace = CL_TraceLine(vieworg, camboxmins, camboxmaxs, chase_dest, MOVE_NOMONSTERS, NULL, SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_SKY, true, false, NULL, false);
 519 #else
 520                                         //trace = CL_TraceBox(vieworg, eyeboxmins, eyeboxmaxs, chase_dest, MOVE_NOMONSTERS, NULL, SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_SKY, true, false, NULL, false);
 521                                         trace = CL_TraceBox(vieworg, camboxmins, camboxmaxs, chase_dest, MOVE_NOMONSTERS, NULL, SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_SKY, true, false, NULL, false);
 522 #endif
 523                                         VectorCopy(trace.endpos, vieworg);
 524                                         vieworg[2] -= 8;
 525 #else
 526                                         // trace from first person view location to our chosen third person view location
 527 #if 1
 528                                         trace = CL_TraceLine(vieworg, chase_dest, MOVE_NOMONSTERS, NULL, SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_SKY, true, false, NULL, false);
 529 #else
 530                                         trace = CL_TraceBox(vieworg, camboxmins, camboxmaxs, chase_dest, MOVE_NOMONSTERS, NULL, SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_SKY, true, false, NULL, false);
 531 #endif
 532                                         VectorCopy(trace.endpos, bestvieworg);
 533                                         offset[2] = 0;
 534                                         for (offset[0] = -16;offset[0] <= 16;offset[0] += 8)
 535                                         {
 536                                                 for (offset[1] = -16;offset[1] <= 16;offset[1] += 8)
 537                                                 {
 538                                                         AngleVectors(viewangles, NULL, NULL, up);
 539                                                         chase_dest[0] = vieworg[0] - forward[0] * camback + up[0] * camup + offset[0];
 540                                                         chase_dest[1] = vieworg[1] - forward[1] * camback + up[1] * camup + offset[1];
 541                                                         chase_dest[2] = vieworg[2] - forward[2] * camback + up[2] * camup + offset[2];
 542 #if 1
 543                                                         trace = CL_TraceLine(vieworg, chase_dest, MOVE_NOMONSTERS, NULL, SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_SKY, true, false, NULL, false);
 544 #else
 545                                                         trace = CL_TraceBox(vieworg, camboxmins, camboxmaxs, chase_dest, MOVE_NOMONSTERS, NULL, SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_SKY, true, false, NULL, false);
 546 #endif
 547                                                         if (bestvieworg[2] > trace.endpos[2])
 548                                                                 bestvieworg[2] = trace.endpos[2];
 549                                                 }
 550                                         }
 551                                         bestvieworg[2] -= 8;
 552                                         VectorCopy(bestvieworg, vieworg);
 553 #endif
 554                                         viewangles[PITCH] = campitch;
 555                                 }
 556                                 else
 557                                 {
 558                                         if (gamemode == GAME_GOODVSBAD2 && chase_stevie.integer)
 559                                         {
 560                                                 // look straight down from high above
 561                                                 viewangles[PITCH] = 90;
 562                                                 camback = 2048;
 563                                                 VectorSet(forward, 0, 0, -1);
 564                                         }
 565
 566                                         // trace a little further so it hits a surface more consistently (to avoid 'snapping' on the edge of the range)
 567                                         dist = -camback - 8;
 568                                         chase_dest[0] = vieworg[0] + forward[0] * dist;
 569                                         chase_dest[1] = vieworg[1] + forward[1] * dist;
 570                                         chase_dest[2] = vieworg[2] + forward[2] * dist + camup;
 571                                         trace = CL_TraceLine(vieworg, chase_dest, MOVE_NOMONSTERS, NULL, SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_SKY, true, false, NULL, false);
 572                                         VectorMAMAM(1, trace.endpos, 8, forward, 4, trace.plane.normal, vieworg);
 573                                 }
 574                         }
 575                         else
 576                         {
 577                                 // first person view from entity
 578                                 // angles
 579                                 if (cl.stats[STAT_HEALTH] <= 0 && v_deathtilt.integer)
 580                                         viewangles[ROLL] = v_deathtiltangle.value;
 581                                 VectorAdd(viewangles, cl.punchangle, viewangles);
 582                                 viewangles[ROLL] += V_CalcRoll(cl.viewangles, cl.velocity);
 583                                 if (v_dmg_time > 0)
 584                                 {
 585                                         viewangles[ROLL] += v_dmg_time/v_kicktime.value*v_dmg_roll;
 586                                         viewangles[PITCH] += v_dmg_time/v_kicktime.value*v_dmg_pitch;
 587                                 }
 588                                 // origin
 589                                 VectorAdd(vieworg, cl.punchvector, vieworg);
 590                                 if (cl.stats[STAT_HEALTH] > 0)
 591                                 {
 592                                         double xyspeed, bob, bobroll;
 593                                         float cycle, cycle2;
 594                                         vec_t frametime;
 595
 596                                         frametime = cl.realframetime * cl.movevars_timescale;
 597
 598                                         // 1. if we teleported, clear the frametime... the lowpass will recover the previous value then
 599                                         if(!ent->persistent.trail_allowed) // FIXME improve this check
 600                                         {
 601                                                 // try to fix the first highpass; result is NOT
 602                                                 // perfect! TODO find a better fix
 603                                                 VectorCopy(viewangles, cl.gunangles_prev);
 604                                                 VectorCopy(vieworg, cl.gunorg_prev);
 605                                         }
 606
 607                                         // 2. for the gun origin, only keep the high frequency (non-DC) parts, which is "somewhat like velocity"
 608                                         VectorAdd(cl.gunorg_highpass, cl.gunorg_prev, cl.gunorg_highpass);
 609                                         highpass3_limited(vieworg, frametime*cl_followmodel_side_highpass1.value, cl_followmodel_side_limit.value, frametime*cl_followmodel_side_highpass1.value, cl_followmodel_side_limit.value, frametime*cl_followmodel_up_highpass1.value, cl_followmodel_up_limit.value, cl.gunorg_highpass, gunorg);
 610                                         VectorCopy(vieworg, cl.gunorg_prev);
 611                                         VectorSubtract(cl.gunorg_highpass, cl.gunorg_prev, cl.gunorg_highpass);
 612
 613                                         // in the highpass, we _store_ the DIFFERENCE to the actual view angles...
 614                                         VectorAdd(cl.gunangles_highpass, cl.gunangles_prev, cl.gunangles_highpass);
 615                                         cl.gunangles_highpass[PITCH] += 360 * floor((viewangles[PITCH] - cl.gunangles_highpass[PITCH]) / 360 + 0.5);
 616                                         cl.gunangles_highpass[YAW] += 360 * floor((viewangles[YAW] - cl.gunangles_highpass[YAW]) / 360 + 0.5);
 617                                         cl.gunangles_highpass[ROLL] += 360 * floor((viewangles[ROLL] - cl.gunangles_highpass[ROLL]) / 360 + 0.5);
 618                                         highpass3_limited(viewangles, frametime*cl_leanmodel_up_highpass1.value, cl_leanmodel_up_limit.value, frametime*cl_leanmodel_side_highpass1.value, cl_leanmodel_side_limit.value, 0, 0, cl.gunangles_highpass, gunangles);
 619                                         VectorCopy(viewangles, cl.gunangles_prev);
 620                                         VectorSubtract(cl.gunangles_highpass, cl.gunangles_prev, cl.gunangles_highpass);
 621
 622                                         // 3. calculate the RAW adjustment vectors
 623                                         gunorg[0] *= (cl_followmodel.value ? -cl_followmodel_side_speed.value : 0);
 624                                         gunorg[1] *= (cl_followmodel.value ? -cl_followmodel_side_speed.value : 0);
 625                                         gunorg[2] *= (cl_followmodel.value ? -cl_followmodel_up_speed.value : 0);
 626
 627                                         gunangles[PITCH] *= (cl_leanmodel.value ? -cl_leanmodel_up_speed.value : 0);
 628                                         gunangles[YAW] *= (cl_leanmodel.value ? -cl_leanmodel_side_speed.value : 0);
 629                                         gunangles[ROLL] = 0;
 630
 631                                         // 4. perform highpass/lowpass on the adjustment vectors (turning velocity into acceleration!)
 632                                         //    trick: we must do the lowpass LAST, so the lowpass vector IS the final vector!
 633                                         highpass3(gunorg, frametime*cl_followmodel_side_highpass.value, frametime*cl_followmodel_side_highpass.value, frametime*cl_followmodel_up_highpass.value, cl.gunorg_adjustment_highpass, gunorg);
 634                                         lowpass3(gunorg, frametime*cl_followmodel_side_lowpass.value, frametime*cl_followmodel_side_lowpass.value, frametime*cl_followmodel_up_lowpass.value, cl.gunorg_adjustment_lowpass, gunorg);
 635                                         // we assume here: PITCH = 0, YAW = 1, ROLL = 2
 636                                         highpass3(gunangles, frametime*cl_leanmodel_up_highpass.value, frametime*cl_leanmodel_side_highpass.value, 0, cl.gunangles_adjustment_highpass, gunangles);
 637                                         lowpass3(gunangles, frametime*cl_leanmodel_up_lowpass.value, frametime*cl_leanmodel_side_lowpass.value, 0, cl.gunangles_adjustment_lowpass, gunangles);
 638
 639                                         // 5. use the adjusted vectors
 640                                         VectorAdd(vieworg, gunorg, gunorg);
 641                                         VectorAdd(viewangles, gunangles, gunangles);
 642
 643                                         // view bobbing code
 644                                         xyspeed = sqrt(cl.velocity[0]*cl.velocity[0] + cl.velocity[1]*cl.velocity[1]);
 645                                         if (cl_bob.value && cl_bobcycle.value)
 646                                         {
 647                                                 // LordHavoc: this code is *weird*, but not replacable (I think it
 648                                                 // should be done in QC on the server, but oh well, quake is quake)
 649                                                 // LordHavoc: figured out bobup: the time at which the sin is at 180
 650                                                 // degrees (which allows lengthening or squishing the peak or valley)
 651                                                 cycle = cl.time / cl_bobcycle.value;
 652                                                 cycle -= (int) cycle;
 653                                                 if (cycle < cl_bobup.value)
 654                                                         cycle = sin(M_PI * cycle / cl_bobup.value);
 655                                                 else
 656                                                         cycle = sin(M_PI + M_PI * (cycle-cl_bobup.value)/(1.0 - cl_bobup.value));
 657                                                 // bob is proportional to velocity in the xy plane
 658                                                 // (don't count Z, or jumping messes it up)
 659                                                 bob = xyspeed * cl_bob.value;
 660                                                 bob = bob*0.3 + bob*0.7*cycle;
 661                                                 vieworg[2] += bound(-7, bob, 4);
 662                                                 // we also need to adjust gunorg, or this appears like pushing the gun!
 663                                                 // In the old code, this was applied to vieworg BEFORE copying to gunorg,
 664                                                 // but this is not viable with the new followmodel code as that would mean
 665                                                 // that followmodel would work on the munged-by-bob vieworg and do feedback
 666                                                 gunorg[2] += bound(-7, bob, 4);
 667                                         }
 668
 669                                         // view rolling code
 670                                         // TODO 1 (DONE): Make it work around the center rather than the left side
 671                                         // TODO 2 (DONE): Make the roll smoothly return to 0 when you stop touching the ground, rather than instantly
 672                                         // TODO 3: Write cvars to darkplaces.txt, set better defaults and possibly disable by default once the first TODOs are ready
 673                                         if (cl_bobroll.value && cl_bobrollcycle.value)
 674                                         {
 675                                                 cycle2 = cl.time / cl_bobrollcycle.value;
 676                                                 cycle2 -= (int) cycle2;
 677                                                 if (cycle2 < 0.5)
 678                                                         cycle2 = sin(M_PI * cycle2 / 0.5);
 679                                                 else
 680                                                         cycle2 = sin(M_PI + M_PI * (cycle2-0.5)/0.5);
 681
 682                                                 if (cl.onground)
 683                                                         cl.bobroll_airtime = 1;
 684                                                 else
 685                                                 {
 686                                                         if(cl.bobroll_airtime > 0)
 687                                                                 cl.bobroll_airtime -= bound(0, cl_bobrollairtime.value, 1);
 688                                                         else
 689                                                                 cl.bobroll_airtime = 0;
 690                                                 }
 691
 692                                                 cycle2 *= cl_bobrollup.value * cl.bobroll_airtime;
 693                                                 bobroll = bound(0, xyspeed, sv_maxspeed.value) * cycle2;
 694                                                 viewangles[2] = bound(-45, bobroll, 45);
 695                                         }
 696
 697                                         // gun model bobbing code
 698                                         if (cl_bob.value && cl_bobmodel.value)
 699                                         {
 700                                                 // calculate for swinging gun model
 701                                                 // the gun bobs when running on the ground, but doesn't bob when you're in the air.
 702                                                 // Sajt: I tried to smooth out the transitions between bob and no bob, which works
 703                                                 // for the most part, but for some reason when you go through a message trigger or
 704                                                 // pick up an item or anything like that it will momentarily jolt the gun.
 705                                                 vec3_t forward, right, up;
 706                                                 float bspeed;
 707                                                 float s;
 708                                                 float t;
 709
 710                                                 s = cl.time * cl_bobmodel_speed.value;
 711                                                 if (cl.onground)
 712                                                 {
 713                                                         if (cl.time - cl.hitgroundtime < 0.2)
 714                                                         {
 715                                                                 // just hit the ground, speed the bob back up over the next 0.2 seconds
 716                                                                 t = cl.time - cl.hitgroundtime;
 717                                                                 t = bound(0, t, 0.2);
 718                                                                 t *= 5;
 719                                                         }
 720                                                         else
 721                                                                 t = 1;
 722                                                 }
 723                                                 else
 724                                                 {
 725                                                         // recently left the ground, slow the bob down over the next 0.2 seconds
 726                                                         t = cl.time - cl.lastongroundtime;
 727                                                         t = 0.2 - bound(0, t, 0.2);
 728                                                         t *= 5;
 729                                                 }
 730
 731                                                 bspeed = bound (0, xyspeed, 400) * 0.01f;
 732                                                 AngleVectors (gunangles, forward, right, up);
 733                                                 bob = bspeed * cl_bobmodel_side.value * cl_viewmodel_scale.value * sin (s) * t;
 734                                                 VectorMA (gunorg, bob, right, gunorg);
 735                                                 bob = bspeed * cl_bobmodel_up.value * cl_viewmodel_scale.value * cos (s * 2) * t;
 736                                                 VectorMA (gunorg, bob, up, gunorg);
 737                                         }
 738                                 }
 739                         }
 740                         // calculate a view matrix for rendering the scene
 741                         if (v_idlescale.value)
 742                                 Matrix4x4_CreateFromQuakeEntity(&r_refdef.view.matrix, vieworg[0], vieworg[1], vieworg[2], viewangles[0] + v_idlescale.value * sin(cl.time*v_ipitch_cycle.value) * v_ipitch_level.value, viewangles[1] + v_idlescale.value * sin(cl.time*v_iyaw_cycle.value) * v_iyaw_level.value, viewangles[2] + v_idlescale.value * sin(cl.time*v_iroll_cycle.value) * v_iroll_level.value, 1);
 743                         else
 744                                 Matrix4x4_CreateFromQuakeEntity(&r_refdef.view.matrix, vieworg[0], vieworg[1], vieworg[2], viewangles[0], viewangles[1], viewangles[2] + v_idlescale.value * sin(cl.time*v_iroll_cycle.value) * v_iroll_level.value, 1);
 745                         // calculate a viewmodel matrix for use in view-attached entities
 746                         Matrix4x4_CreateFromQuakeEntity(&viewmodelmatrix, gunorg[0], gunorg[1], gunorg[2], gunangles[0], gunangles[1], gunangles[2], cl_viewmodel_scale.value);
 747                         VectorCopy(vieworg, cl.csqc_origin);
 748                         VectorCopy(viewangles, cl.csqc_angles);
 749                 }
 750         }
 751 }
 752
 753 void V_FadeViewFlashs(void)
 754 {
 755         // don't flash if time steps backwards
 756         if (cl.time <= cl.oldtime)
 757                 return;
 758         // drop the damage value
 759         cl.cshifts[CSHIFT_DAMAGE].percent -= (cl.time - cl.oldtime)*cl.cshifts[CSHIFT_DAMAGE].alphafade;
 760         if (cl.cshifts[CSHIFT_DAMAGE].percent <= 0)
 761                 cl.cshifts[CSHIFT_DAMAGE].percent = 0;
 762         // drop the bonus value
 763         cl.cshifts[CSHIFT_BONUS].percent -= (cl.time - cl.oldtime)*cl.cshifts[CSHIFT_BONUS].alphafade;
 764         if (cl.cshifts[CSHIFT_BONUS].percent <= 0)
 765                 cl.cshifts[CSHIFT_BONUS].percent = 0;
 766 }
 767
 768 void V_CalcViewBlend(void)
 769 {
 770         float a2;
 771         int j;
 772         r_refdef.viewblend[0] = 0;
 773         r_refdef.viewblend[1] = 0;
 774         r_refdef.viewblend[2] = 0;
 775         r_refdef.viewblend[3] = 0;
 776         r_refdef.frustumscale_x = 1;
 777         r_refdef.frustumscale_y = 1;
 778         if (cls.state == ca_connected && cls.signon == SIGNONS)
 779         {
 780                 // set contents color
 781                 int supercontents;
 782                 vec3_t vieworigin;
 783                 Matrix4x4_OriginFromMatrix(&r_refdef.view.matrix, vieworigin);
 784                 supercontents = CL_PointSuperContents(vieworigin);
 785                 if (supercontents & SUPERCONTENTS_LIQUIDSMASK)
 786                 {
 787                         r_refdef.frustumscale_x *= 1 - (((sin(cl.time * 4.7) + 1) * 0.015) * r_waterwarp.value);
 788                         r_refdef.frustumscale_y *= 1 - (((sin(cl.time * 3.0) + 1) * 0.015) * r_waterwarp.value);
 789                         if (supercontents & SUPERCONTENTS_LAVA)
 790                         {
 791                                 cl.cshifts[CSHIFT_CONTENTS].destcolor[0] = 255;
 792                                 cl.cshifts[CSHIFT_CONTENTS].destcolor[1] = 80;
 793                                 cl.cshifts[CSHIFT_CONTENTS].destcolor[2] = 0;
 794                         }
 795                         else if (supercontents & SUPERCONTENTS_SLIME)
 796                         {
 797                                 cl.cshifts[CSHIFT_CONTENTS].destcolor[0] = 0;
 798                                 cl.cshifts[CSHIFT_CONTENTS].destcolor[1] = 25;
 799                                 cl.cshifts[CSHIFT_CONTENTS].destcolor[2] = 5;
 800                         }
 801                         else
 802                         {
 803                                 cl.cshifts[CSHIFT_CONTENTS].destcolor[0] = 130;
 804                                 cl.cshifts[CSHIFT_CONTENTS].destcolor[1] = 80;
 805                                 cl.cshifts[CSHIFT_CONTENTS].destcolor[2] = 50;
 806                         }
 807                         cl.cshifts[CSHIFT_CONTENTS].percent = 150 * 0.5;
 808                 }
 809                 else
 810                 {
 811                         cl.cshifts[CSHIFT_CONTENTS].destcolor[0] = 0;
 812                         cl.cshifts[CSHIFT_CONTENTS].destcolor[1] = 0;
 813                         cl.cshifts[CSHIFT_CONTENTS].destcolor[2] = 0;
 814                         cl.cshifts[CSHIFT_CONTENTS].percent = 0;
 815                 }
 816
 817                 if (gamemode != GAME_TRANSFUSION)
 818                 {
 819                         if (cl.stats[STAT_ITEMS] & IT_QUAD)
 820                         {
 821                                 cl.cshifts[CSHIFT_POWERUP].destcolor[0] = 0;
 822                                 cl.cshifts[CSHIFT_POWERUP].destcolor[1] = 0;
 823                                 cl.cshifts[CSHIFT_POWERUP].destcolor[2] = 255;
 824                                 cl.cshifts[CSHIFT_POWERUP].percent = 30;
 825                         }
 826                         else if (cl.stats[STAT_ITEMS] & IT_SUIT)
 827                         {
 828                                 cl.cshifts[CSHIFT_POWERUP].destcolor[0] = 0;
 829                                 cl.cshifts[CSHIFT_POWERUP].destcolor[1] = 255;
 830                                 cl.cshifts[CSHIFT_POWERUP].destcolor[2] = 0;
 831                                 cl.cshifts[CSHIFT_POWERUP].percent = 20;
 832                         }
 833                         else if (cl.stats[STAT_ITEMS] & IT_INVISIBILITY)
 834                         {
 835                                 cl.cshifts[CSHIFT_POWERUP].destcolor[0] = 100;
 836                                 cl.cshifts[CSHIFT_POWERUP].destcolor[1] = 100;
 837                                 cl.cshifts[CSHIFT_POWERUP].destcolor[2] = 100;
 838                                 cl.cshifts[CSHIFT_POWERUP].percent = 100;
 839                         }
 840                         else if (cl.stats[STAT_ITEMS] & IT_INVULNERABILITY)
 841                         {
 842                                 cl.cshifts[CSHIFT_POWERUP].destcolor[0] = 255;
 843                                 cl.cshifts[CSHIFT_POWERUP].destcolor[1] = 255;
 844                                 cl.cshifts[CSHIFT_POWERUP].destcolor[2] = 0;
 845                                 cl.cshifts[CSHIFT_POWERUP].percent = 30;
 846                         }
 847                         else
 848                                 cl.cshifts[CSHIFT_POWERUP].percent = 0;
 849                 }
 850
 851                 cl.cshifts[CSHIFT_VCSHIFT].destcolor[0] = v_cshift.destcolor[0];
 852                 cl.cshifts[CSHIFT_VCSHIFT].destcolor[1] = v_cshift.destcolor[1];
 853                 cl.cshifts[CSHIFT_VCSHIFT].destcolor[2] = v_cshift.destcolor[2];
 854                 cl.cshifts[CSHIFT_VCSHIFT].percent = v_cshift.percent;
 855
 856                 // LordHavoc: fixed V_CalcBlend
 857                 for (j = 0;j < NUM_CSHIFTS;j++)
 858                 {
 859                         a2 = bound(0.0f, cl.cshifts[j].percent * (1.0f / 255.0f), 1.0f);
 860                         if (a2 > 0)
 861                         {
 862                                 VectorLerp(r_refdef.viewblend, a2, cl.cshifts[j].destcolor, r_refdef.viewblend);
 863                                 r_refdef.viewblend[3] = (1 - (1 - r_refdef.viewblend[3]) * (1 - a2)); // correct alpha multiply...  took a while to find it on the web
 864                         }
 865                 }
 866                 // saturate color (to avoid blending in black)
 867                 if (r_refdef.viewblend[3])
 868                 {
 869                         a2 = 1 / r_refdef.viewblend[3];
 870                         VectorScale(r_refdef.viewblend, a2, r_refdef.viewblend);
 871                 }
 872                 r_refdef.viewblend[0] = bound(0.0f, r_refdef.viewblend[0] * (1.0f/255.0f), 1.0f);
 873                 r_refdef.viewblend[1] = bound(0.0f, r_refdef.viewblend[1] * (1.0f/255.0f), 1.0f);
 874                 r_refdef.viewblend[2] = bound(0.0f, r_refdef.viewblend[2] * (1.0f/255.0f), 1.0f);
 875                 r_refdef.viewblend[3] = bound(0.0f, r_refdef.viewblend[3] * gl_polyblend.value, 1.0f);
 876
 877                 // Samual: Ugly hack, I know. But it's the best we can do since
 878                 // there is no way to detect client states from the engine.
 879                 if (cl.stats[STAT_HEALTH] <= 0 && cl.stats[STAT_HEALTH] != -666 &&
 880                         cl.stats[STAT_HEALTH] != -2342 && cl_deathfade.value > 0)
 881                 {
 882                         cl.deathfade += cl_deathfade.value * max(0.00001, cl.time - cl.oldtime);
 883                         cl.deathfade = bound(0.0f, cl.deathfade, 0.9f);
 884                 }
 885                 else
 886                         cl.deathfade = 0.0f;
 887
 888                 if(cl.deathfade > 0)
 889                 {
 890                         float a;
 891                         float deathfadevec[3] = {0.3f, 0.0f, 0.0f};
 892                         a = r_refdef.viewblend[3] + cl.deathfade - r_refdef.viewblend[3]*cl.deathfade;
 893                         if(a > 0)
 894                                 VectorMAM(r_refdef.viewblend[3] * (1 - cl.deathfade) / a, r_refdef.viewblend, cl.deathfade / a, deathfadevec, r_refdef.viewblend);
 895                         r_refdef.viewblend[3] = a;
 896                 }
 897         }
 898 }
 899
 900 //============================================================================
 901
 902 /*
 903 =============
 904 V_Init
 905 =============
 906 */
 907 void V_Init (void)
 908 {
 909         Cmd_AddCommand ("v_cshift", V_cshift_f, "sets tint color of view");
 910         Cmd_AddCommand ("bf", V_BonusFlash_f, "briefly flashes a bright color tint on view (used when items are picked up); optionally takes R G B [A [alphafade]] arguments to specify how the flash looks");
 911         Cmd_AddCommand ("centerview", V_StartPitchDrift, "gradually recenter view (stop looking up/down)");
 912
 913         Cvar_RegisterVariable (&v_centermove);
 914         Cvar_RegisterVariable (&v_centerspeed);
 915
 916         Cvar_RegisterVariable (&v_iyaw_cycle);
 917         Cvar_RegisterVariable (&v_iroll_cycle);
 918         Cvar_RegisterVariable (&v_ipitch_cycle);
 919         Cvar_RegisterVariable (&v_iyaw_level);
 920         Cvar_RegisterVariable (&v_iroll_level);
 921         Cvar_RegisterVariable (&v_ipitch_level);
 922
 923         Cvar_RegisterVariable (&v_idlescale);
 924         Cvar_RegisterVariable (&crosshair);
 925
 926         Cvar_RegisterVariable (&cl_rollspeed);
 927         Cvar_RegisterVariable (&cl_rollangle);
 928         Cvar_RegisterVariable (&cl_bob);
 929         Cvar_RegisterVariable (&cl_bobcycle);
 930         Cvar_RegisterVariable (&cl_bobup);
 931         Cvar_RegisterVariable (&cl_bobroll);
 932         Cvar_RegisterVariable (&cl_bobrollcycle);
 933         Cvar_RegisterVariable (&cl_bobrollup);
 934         Cvar_RegisterVariable (&cl_bobrollairtime);
 935         Cvar_RegisterVariable (&cl_bobmodel);
 936         Cvar_RegisterVariable (&cl_bobmodel_side);
 937         Cvar_RegisterVariable (&cl_bobmodel_up);
 938         Cvar_RegisterVariable (&cl_bobmodel_speed);
 939
 940         Cvar_RegisterVariable (&cl_leanmodel);
 941         Cvar_RegisterVariable (&cl_leanmodel_side_speed);
 942         Cvar_RegisterVariable (&cl_leanmodel_side_limit);
 943         Cvar_RegisterVariable (&cl_leanmodel_side_highpass1);
 944         Cvar_RegisterVariable (&cl_leanmodel_side_lowpass);
 945         Cvar_RegisterVariable (&cl_leanmodel_side_highpass);
 946         Cvar_RegisterVariable (&cl_leanmodel_up_speed);
 947         Cvar_RegisterVariable (&cl_leanmodel_up_limit);
 948         Cvar_RegisterVariable (&cl_leanmodel_up_highpass1);
 949         Cvar_RegisterVariable (&cl_leanmodel_up_lowpass);
 950         Cvar_RegisterVariable (&cl_leanmodel_up_highpass);
 951
 952         Cvar_RegisterVariable (&cl_followmodel);
 953         Cvar_RegisterVariable (&cl_followmodel_side_speed);
 954         Cvar_RegisterVariable (&cl_followmodel_side_limit);
 955         Cvar_RegisterVariable (&cl_followmodel_side_highpass1);
 956         Cvar_RegisterVariable (&cl_followmodel_side_lowpass);
 957         Cvar_RegisterVariable (&cl_followmodel_side_highpass);
 958         Cvar_RegisterVariable (&cl_followmodel_up_speed);
 959         Cvar_RegisterVariable (&cl_followmodel_up_limit);
 960         Cvar_RegisterVariable (&cl_followmodel_up_highpass1);
 961         Cvar_RegisterVariable (&cl_followmodel_up_lowpass);
 962         Cvar_RegisterVariable (&cl_followmodel_up_highpass);
 963
 964         Cvar_RegisterVariable (&cl_viewmodel_scale);
 965
 966         Cvar_RegisterVariable (&v_kicktime);
 967         Cvar_RegisterVariable (&v_kickroll);
 968         Cvar_RegisterVariable (&v_kickpitch);
 969
 970         Cvar_RegisterVariable (&cl_stairsmoothspeed);
 971
 972         Cvar_RegisterVariable (&chase_back);
 973         Cvar_RegisterVariable (&chase_up);
 974         Cvar_RegisterVariable (&chase_active);
 975         Cvar_RegisterVariable (&chase_overhead);
 976         Cvar_RegisterVariable (&chase_pitchangle);
 977         if (gamemode == GAME_GOODVSBAD2)
 978                 Cvar_RegisterVariable (&chase_stevie);
 979
 980         Cvar_RegisterVariable (&v_deathtilt);
 981         Cvar_RegisterVariable (&v_deathtiltangle);
 982 }
 983