csprogs.c

   1 #include "quakedef.h"
   2 #include "progsvm.h"
   3 #include "clprogdefs.h"
   4 #include "csprogs.h"
   5 #include "cl_collision.h"
   6 #include "snd_main.h"
   7 #include "clvm_cmds.h"
   8 #include "prvm_cmds.h"
   9
  10 //============================================================================
  11 // Client prog handling
  12 //[515]: omg !!! optimize it ! a lot of hacks here and there also :P
  13
  14 #define CSQC_RETURNVAL  prog->globals.generic[OFS_RETURN]
  15 #define CSQC_BEGIN              csqc_tmpprog=prog;prog=0;PRVM_SetProg(PRVM_CLIENTPROG);
  16 #define CSQC_END                prog=csqc_tmpprog;
  17
  18 static prvm_prog_t *csqc_tmpprog;
  19
  20 void CL_VM_PreventInformationLeaks(void)
  21 {
  22         prvm_eval_t *val;
  23         if(!cl.csqc_loaded)
  24                 return;
  25         CSQC_BEGIN
  26                 VM_ClearTraceGlobals();
  27                 if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.trace_networkentity)))
  28                         val->_float = 0;
  29         CSQC_END
  30 }
  31
  32 //[515]: these are required funcs
  33 static char *cl_required_func[] =
  34 {
  35         "CSQC_Init",
  36         "CSQC_InputEvent",
  37         "CSQC_UpdateView",
  38         "CSQC_ConsoleCommand",
  39 };
  40
  41 static int cl_numrequiredfunc = sizeof(cl_required_func) / sizeof(char*);
  42
  43 void CL_VM_Error (const char *format, ...) DP_FUNC_PRINTF(1);
  44 void CL_VM_Error (const char *format, ...)      //[515]: hope it will be never executed =)
  45 {
  46         char errorstring[4096];
  47         va_list argptr;
  48
  49         va_start (argptr, format);
  50         dpvsnprintf (errorstring, sizeof(errorstring), format, argptr);
  51         va_end (argptr);
  52 //      Con_Printf( "CL_VM_Error: %s\n", errorstring );
  53
  54         PRVM_Crash();
  55         cl.csqc_loaded = false;
  56
  57         Cvar_SetValueQuick(&csqc_progcrc, -1);
  58         Cvar_SetValueQuick(&csqc_progsize, -1);
  59
  60 //      Host_AbortCurrentFrame();       //[515]: hmmm... if server says it needs csqc then client MUST disconnect
  61         Host_Error("CL_VM_Error: %s", errorstring);
  62 }
  63 void CL_VM_UpdateDmgGlobals (int dmg_take, int dmg_save, vec3_t dmg_origin)
  64 {
  65         prvm_eval_t *val;
  66         if(cl.csqc_loaded)
  67         {
  68                 CSQC_BEGIN
  69                 val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.dmg_take);
  70                 if(val)
  71                         val->_float = dmg_take;
  72                 val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.dmg_save);
  73                 if(val)
  74                         val->_float = dmg_save;
  75                 val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.dmg_origin);
  76                 if(val)
  77                 {
  78                         val->vector[0] = dmg_origin[0];
  79                         val->vector[1] = dmg_origin[1];
  80                         val->vector[2] = dmg_origin[2];
  81                 }
  82                 CSQC_END
  83         }
  84 }
  85
  86 void CSQC_UpdateNetworkTimes(double newtime, double oldtime)
  87 {
  88         prvm_eval_t *val;
  89         if(!cl.csqc_loaded)
  90                 return;
  91         CSQC_BEGIN
  92         if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.servertime)))
  93                 val->_float = newtime;
  94         if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.serverprevtime)))
  95                 val->_float = oldtime;
  96         if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.serverdeltatime)))
  97                 val->_float = newtime - oldtime;
  98         CSQC_END
  99 }
 100
 101 //[515]: set globals before calling R_UpdateView, WEIRD CRAP
 102 static void CSQC_SetGlobals (void)
 103 {
 104         prvm_eval_t *val;
 105         CSQC_BEGIN
 106                 prog->globals.client->time = cl.time;
 107                 prog->globals.client->frametime = max(0, cl.time - cl.oldtime);
 108                 prog->globals.client->servercommandframe = cls.servermovesequence;
 109                 prog->globals.client->clientcommandframe = cl.movecmd[0].sequence;
 110                 VectorCopy(cl.viewangles, prog->globals.client->input_angles);
 111                 VectorCopy(cl.viewangles, cl.csqc_angles);
 112                 // // FIXME: this actually belongs into getinputstate().. [12/17/2007 Black]
 113                 prog->globals.client->input_buttons = cl.movecmd[0].buttons;
 114                 VectorSet(prog->globals.client->input_movevalues, cl.movecmd[0].forwardmove, cl.movecmd[0].sidemove, cl.movecmd[0].upmove);
 115                 //VectorCopy(cl.movement_origin, cl.csqc_origin);
 116                 Matrix4x4_OriginFromMatrix(&cl.entities[cl.viewentity].render.matrix, cl.csqc_origin);
 117
 118                 // LordHavoc: Spike says not to do this, but without pmove_org the
 119                 // CSQC is useless as it can't alter the view origin without
 120                 // completely replacing it
 121                 VectorCopy(cl.csqc_origin, prog->globals.client->pmove_org);
 122                 VectorCopy(cl.movement_velocity, prog->globals.client->pmove_vel);
 123
 124                 if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.view_angles)))
 125                         VectorCopy(cl.viewangles, val->vector);
 126                 prog->globals.client->maxclients = cl.maxclients;
 127         CSQC_END
 128 }
 129
 130 void CSQC_Predraw (prvm_edict_t *ed)
 131 {
 132         int b;
 133         if(!ed->fields.client->predraw)
 134                 return;
 135         b = prog->globals.client->self;
 136         prog->globals.client->self = PRVM_EDICT_TO_PROG(ed);
 137         PRVM_ExecuteProgram(ed->fields.client->predraw, "CSQC_Predraw: NULL function\n");
 138         prog->globals.client->self = b;
 139 }
 140
 141 void CSQC_Think (prvm_edict_t *ed)
 142 {
 143         int b;
 144         if(ed->fields.client->think)
 145         if(ed->fields.client->nextthink && ed->fields.client->nextthink <= prog->globals.client->time)
 146         {
 147                 ed->fields.client->nextthink = 0;
 148                 b = prog->globals.client->self;
 149                 prog->globals.client->self = PRVM_EDICT_TO_PROG(ed);
 150                 PRVM_ExecuteProgram(ed->fields.client->think, "CSQC_Think: NULL function\n");
 151                 prog->globals.client->self = b;
 152         }
 153 }
 154
 155 extern cvar_t cl_noplayershadow;
 156 extern cvar_t r_equalize_entities_fullbright;
 157 qboolean CSQC_AddRenderEdict(prvm_edict_t *ed, int edictnum)
 158 {
 159         int renderflags;
 160         int c;
 161         float scale;
 162         prvm_eval_t *val;
 163         entity_render_t *entrender;
 164         dp_model_t *model;
 165         matrix4x4_t tagmatrix, matrix2;
 166
 167         model = CL_GetModelFromEdict(ed);
 168         if (!model)
 169                 return false;
 170
 171         if (edictnum)
 172         {
 173                 if (r_refdef.scene.numentities >= r_refdef.scene.maxentities)
 174                         return false;
 175                 entrender = cl.csqcrenderentities + edictnum;
 176                 r_refdef.scene.entities[r_refdef.scene.numentities++] = entrender;
 177                 entrender->entitynumber = edictnum;
 178                 //entrender->shadertime = 0; // shadertime was set by spawn()
 179                 entrender->alpha = 1;
 180                 entrender->scale = 1;
 181                 VectorSet(entrender->colormod, 1, 1, 1);
 182                 VectorSet(entrender->glowmod, 1, 1, 1);
 183                 entrender->allowdecals = true;
 184         }
 185         else
 186         {
 187                 entrender = CL_NewTempEntity(0);
 188                 if (!entrender)
 189                         return false;
 190         }
 191
 192         entrender->model = model;
 193         entrender->skinnum = (int)ed->fields.client->skin;
 194         entrender->effects |= entrender->model->effects;
 195         scale = 1;
 196         renderflags = 0;
 197         if((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.renderflags)) && val->_float)     renderflags = (int)val->_float;
 198         if((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.alpha)) && val->_float)           entrender->alpha = val->_float;
 199         if((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.scale)) && val->_float)           entrender->scale = scale = val->_float;
 200         if((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.colormod)) && VectorLength2(val->vector)) VectorCopy(val->vector, entrender->colormod);
 201         if((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.glowmod)) && VectorLength2(val->vector))  VectorCopy(val->vector, entrender->glowmod);
 202         if((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.effects)) && val->_float) entrender->effects |= (int)val->_float;
 203         if((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.tag_entity)) && val->edict)
 204         {
 205                 int tagentity;
 206                 int tagindex = 0;
 207                 tagentity = val->edict;
 208                 if((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.tag_index)) && val->_float)
 209                         tagindex = (int)val->_float;
 210                 CL_GetTagMatrix (&tagmatrix, PRVM_PROG_TO_EDICT(tagentity), tagindex);
 211         }
 212         else
 213                 Matrix4x4_CreateIdentity(&tagmatrix);
 214         if (!VectorLength2(entrender->colormod))
 215                 VectorSet(entrender->colormod, 1, 1, 1);
 216         if (!VectorLength2(entrender->glowmod))
 217                 VectorSet(entrender->glowmod, 1, 1, 1);
 218
 219         if (renderflags & RF_USEAXIS)
 220         {
 221                 vec3_t left;
 222                 VectorNegate(prog->globals.client->v_right, left);
 223                 Matrix4x4_FromVectors(&matrix2, prog->globals.client->v_forward, left, prog->globals.client->v_up, ed->fields.client->origin);
 224                 Matrix4x4_Scale(&matrix2, scale, 1);
 225         }
 226         else
 227         {
 228                 vec3_t angles;
 229                 VectorCopy(ed->fields.client->angles, angles);
 230                 // if model is alias, reverse pitch direction
 231                 if (entrender->model->type == mod_alias)
 232                         angles[0] = -angles[0];
 233
 234                 // set up the render matrix
 235                 Matrix4x4_CreateFromQuakeEntity(&matrix2, ed->fields.client->origin[0], ed->fields.client->origin[1], ed->fields.client->origin[2], angles[0], angles[1], angles[2], scale);
 236         }
 237
 238         // set up the animation data
 239         CL_LoadFrameGroupBlend(ed, entrender);
 240
 241         // concat the matrices to make the entity relative to its tag
 242         Matrix4x4_Concat(&entrender->matrix, &tagmatrix, &matrix2);
 243
 244         // transparent offset
 245         if ((renderflags & RF_USETRANSPARENTOFFSET) && (val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.transparent_offset)))
 246                 entrender->transparent_offset = val->_float;
 247
 248         if(renderflags)
 249         {
 250                 if(renderflags & RF_VIEWMODEL)  entrender->flags |= RENDER_VIEWMODEL | RENDER_NODEPTHTEST;
 251                 if(renderflags & RF_EXTERNALMODEL)entrender->flags |= RENDER_EXTERIORMODEL;
 252                 if(renderflags & RF_NOCULL)             entrender->flags |= RENDER_NOCULL;
 253                 if(renderflags & RF_DEPTHHACK)  entrender->flags |= RENDER_NODEPTHTEST;
 254                 if(renderflags & RF_ADDITIVE)           entrender->flags |= RENDER_ADDITIVE;
 255
 256         }
 257
 258         c = (int)ed->fields.client->colormap;
 259         if (c <= 0)
 260                 CL_SetEntityColormapColors(entrender, -1);
 261         else if (c <= cl.maxclients && cl.scores != NULL)
 262                 CL_SetEntityColormapColors(entrender, cl.scores[c-1].colors);
 263         else
 264                 CL_SetEntityColormapColors(entrender, c);
 265
 266         entrender->flags &= ~(RENDER_SHADOW | RENDER_LIGHT | RENDER_NOSELFSHADOW);
 267         // either fullbright or lit
 268         if(!r_fullbright.integer)
 269         {
 270                 if (!(entrender->effects & EF_FULLBRIGHT))
 271                         entrender->flags |= RENDER_LIGHT;
 272                 else if(r_equalize_entities_fullbright.integer)
 273                         entrender->flags |= RENDER_LIGHT | RENDER_EQUALIZE;
 274         }
 275         // hide player shadow during intermission or nehahra movie
 276         if (!(entrender->effects & (EF_NOSHADOW | EF_ADDITIVE | EF_NODEPTHTEST))
 277          &&  (entrender->alpha >= 1)
 278          && !(entrender->flags & RENDER_VIEWMODEL)
 279          && (!(entrender->flags & RENDER_EXTERIORMODEL) || (!cl.intermission && cls.protocol != PROTOCOL_NEHAHRAMOVIE && !cl_noplayershadow.integer)))
 280                 entrender->flags |= RENDER_SHADOW;
 281         if (entrender->flags & RENDER_VIEWMODEL)
 282                 entrender->flags |= RENDER_NOSELFSHADOW;
 283         if (entrender->effects & EF_NOSELFSHADOW)
 284                 entrender->flags |= RENDER_NOSELFSHADOW;
 285         if (entrender->effects & EF_NODEPTHTEST)
 286                 entrender->flags |= RENDER_NODEPTHTEST;
 287         if (entrender->effects & EF_ADDITIVE)
 288                 entrender->flags |= RENDER_ADDITIVE;
 289         if (entrender->effects & EF_DOUBLESIDED)
 290                 entrender->flags |= RENDER_DOUBLESIDED;
 291
 292         // make the other useful stuff
 293         CL_UpdateRenderEntity(entrender);
 294
 295         return true;
 296 }
 297
 298 qboolean CL_VM_InputEvent (qboolean down, int key, int ascii)
 299 {
 300         qboolean r;
 301
 302         if(!cl.csqc_loaded)
 303                 return false;
 304
 305         CSQC_BEGIN
 306                 if (!prog->funcoffsets.CSQC_InputEvent)
 307                         r = false;
 308                 else
 309                 {
 310                         prog->globals.client->time = cl.time;
 311                         prog->globals.client->self = cl.csqc_server2csqcentitynumber[cl.playerentity];
 312                         PRVM_G_FLOAT(OFS_PARM0) = !down; // 0 is down, 1 is up
 313                         PRVM_G_FLOAT(OFS_PARM1) = key;
 314                         PRVM_G_FLOAT(OFS_PARM2) = ascii;
 315                         PRVM_ExecuteProgram(prog->funcoffsets.CSQC_InputEvent, "QC function CSQC_InputEvent is missing");
 316                         r = CSQC_RETURNVAL != 0;
 317                 }
 318         CSQC_END
 319         return r;
 320 }
 321
 322 qboolean CL_VM_UpdateView (void)
 323 {
 324         vec3_t emptyvector;
 325         emptyvector[0] = 0;
 326         emptyvector[1] = 0;
 327         emptyvector[2] = 0;
 328 //      vec3_t oldangles;
 329         if(!cl.csqc_loaded)
 330                 return false;
 331         CSQC_BEGIN
 332                 //VectorCopy(cl.viewangles, oldangles);
 333                 prog->globals.client->time = cl.time;
 334                 prog->globals.client->self = cl.csqc_server2csqcentitynumber[cl.playerentity];
 335                 CSQC_SetGlobals();
 336                 // clear renderable entity and light lists to prevent crashes if the
 337                 // CSQC_UpdateView function does not call R_ClearScene as it should
 338                 r_refdef.scene.numentities = 0;
 339                 r_refdef.scene.numlights = 0;
 340                 // pass in width and height as parameters (EXT_CSQC_1)
 341                 PRVM_G_FLOAT(OFS_PARM0) = vid.width;
 342                 PRVM_G_FLOAT(OFS_PARM1) = vid.height;
 343                 PRVM_ExecuteProgram(prog->funcoffsets.CSQC_UpdateView, "QC function CSQC_UpdateView is missing");
 344                 //VectorCopy(oldangles, cl.viewangles);
 345                 // Dresk : Reset Dmg Globals Here
 346                 CL_VM_UpdateDmgGlobals(0, 0, emptyvector);
 347         CSQC_END
 348         return true;
 349 }
 350
 351 extern sizebuf_t vm_tempstringsbuf;
 352 qboolean CL_VM_ConsoleCommand (const char *cmd)
 353 {
 354         int restorevm_tempstringsbuf_cursize;
 355         qboolean r = false;
 356         if(!cl.csqc_loaded)
 357                 return false;
 358         CSQC_BEGIN
 359         if (prog->funcoffsets.CSQC_ConsoleCommand)
 360         {
 361                 prog->globals.client->time = cl.time;
 362                 prog->globals.client->self = cl.csqc_server2csqcentitynumber[cl.playerentity];
 363                 restorevm_tempstringsbuf_cursize = vm_tempstringsbuf.cursize;
 364                 PRVM_G_INT(OFS_PARM0) = PRVM_SetTempString(cmd);
 365                 PRVM_ExecuteProgram(prog->funcoffsets.CSQC_ConsoleCommand, "QC function CSQC_ConsoleCommand is missing");
 366                 vm_tempstringsbuf.cursize = restorevm_tempstringsbuf_cursize;
 367                 r = CSQC_RETURNVAL != 0;
 368         }
 369         CSQC_END
 370         return r;
 371 }
 372
 373 qboolean CL_VM_Parse_TempEntity (void)
 374 {
 375         int                     t;
 376         qboolean        r = false;
 377         if(!cl.csqc_loaded)
 378                 return false;
 379         CSQC_BEGIN
 380         if(prog->funcoffsets.CSQC_Parse_TempEntity)
 381         {
 382                 t = msg_readcount;
 383                 prog->globals.client->time = cl.time;
 384                 prog->globals.client->self = cl.csqc_server2csqcentitynumber[cl.playerentity];
 385                 PRVM_ExecuteProgram(prog->funcoffsets.CSQC_Parse_TempEntity, "QC function CSQC_Parse_TempEntity is missing");
 386                 r = CSQC_RETURNVAL != 0;
 387                 if(!r)
 388                 {
 389                         msg_readcount = t;
 390                         msg_badread = false;
 391                 }
 392         }
 393         CSQC_END
 394         return r;
 395 }
 396
 397 void CL_VM_Parse_StuffCmd (const char *msg)
 398 {
 399         int restorevm_tempstringsbuf_cursize;
 400         if(msg[0] == 'c')
 401         if(msg[1] == 's')
 402         if(msg[2] == 'q')
 403         if(msg[3] == 'c')
 404         {
 405                 // if this is setting a csqc variable, deprotect csqc_progcrc
 406                 // temporarily so that it can be set by the cvar command,
 407                 // and then reprotect it afterwards
 408                 int crcflags = csqc_progcrc.flags;
 409                 int sizeflags = csqc_progcrc.flags;
 410                 csqc_progcrc.flags &= ~CVAR_READONLY;
 411                 csqc_progsize.flags &= ~CVAR_READONLY;
 412                 Cmd_ExecuteString (msg, src_command);
 413                 csqc_progcrc.flags = crcflags;
 414                 csqc_progsize.flags = sizeflags;
 415                 return;
 416         }
 417
 418         if(cls.demoplayback)
 419         if(!strncmp(msg, "curl --clear_autodownload\ncurl --pak --forthismap --as ", 55))
 420         {
 421                 // special handling for map download commands
 422                 // run these commands IMMEDIATELY, instead of waiting for a client frame
 423                 // that way, there is no black screen when playing back demos
 424                 // I know this is a really ugly hack, but I can't think of any better way
 425                 // FIXME find the actual CAUSE of this, and make demo playback WAIT
 426                 // until all maps are loaded, then remove this hack
 427
 428                 char buf[MAX_INPUTLINE];
 429                 const char *p, *q;
 430                 size_t l;
 431
 432                 p = msg;
 433
 434                 for(;;)
 435                 {
 436                         q = strchr(p, '\n');
 437                         if(q)
 438                                 l = q - p;
 439                         else
 440                                 l = strlen(p);
 441                         if(l > sizeof(buf) - 1)
 442                                 l = sizeof(buf) - 1;
 443                         strlcpy(buf, p, l + 1); // strlcpy needs a + 1 as it includes the newline!
 444
 445                         Cmd_ExecuteString(buf, src_command);
 446
 447                         p += l;
 448                         if(*p == '\n')
 449                                 ++p; // skip the newline and continue
 450                         else
 451                                 break; // end of string or overflow
 452                 }
 453                 Cmd_ExecuteString("curl --clear_autodownload", src_command); // don't inhibit CSQC loading
 454                 return;
 455         }
 456
 457         if(!cl.csqc_loaded)
 458         {
 459                 Cbuf_AddText(msg);
 460                 return;
 461         }
 462         CSQC_BEGIN
 463         if(prog->funcoffsets.CSQC_Parse_StuffCmd)
 464         {
 465                 prog->globals.client->time = cl.time;
 466                 prog->globals.client->self = cl.csqc_server2csqcentitynumber[cl.playerentity];
 467                 restorevm_tempstringsbuf_cursize = vm_tempstringsbuf.cursize;
 468                 PRVM_G_INT(OFS_PARM0) = PRVM_SetTempString(msg);
 469                 PRVM_ExecuteProgram(prog->funcoffsets.CSQC_Parse_StuffCmd, "QC function CSQC_Parse_StuffCmd is missing");
 470                 vm_tempstringsbuf.cursize = restorevm_tempstringsbuf_cursize;
 471         }
 472         else
 473                 Cbuf_AddText(msg);
 474         CSQC_END
 475 }
 476
 477 static void CL_VM_Parse_Print (const char *msg)
 478 {
 479         int restorevm_tempstringsbuf_cursize;
 480         prog->globals.client->time = cl.time;
 481         prog->globals.client->self = cl.csqc_server2csqcentitynumber[cl.playerentity];
 482         restorevm_tempstringsbuf_cursize = vm_tempstringsbuf.cursize;
 483         PRVM_G_INT(OFS_PARM0) = PRVM_SetTempString(msg);
 484         PRVM_ExecuteProgram(prog->funcoffsets.CSQC_Parse_Print, "QC function CSQC_Parse_Print is missing");
 485         vm_tempstringsbuf.cursize = restorevm_tempstringsbuf_cursize;
 486 }
 487
 488 void CSQC_AddPrintText (const char *msg)
 489 {
 490         size_t i;
 491         if(!cl.csqc_loaded)
 492         {
 493                 Con_Print(msg);
 494                 return;
 495         }
 496         CSQC_BEGIN
 497         if(prog->funcoffsets.CSQC_Parse_Print)
 498         {
 499                 // FIXME: is this bugged?
 500                 i = strlen(msg)-1;
 501                 if(msg[i] != '\n' && msg[i] != '\r')
 502                 {
 503                         if(strlen(cl.csqc_printtextbuf)+i >= MAX_INPUTLINE)
 504                         {
 505                                 CL_VM_Parse_Print(cl.csqc_printtextbuf);
 506                                 cl.csqc_printtextbuf[0] = 0;
 507                         }
 508                         else
 509                                 strlcat(cl.csqc_printtextbuf, msg, MAX_INPUTLINE);
 510                         return;
 511                 }
 512                 strlcat(cl.csqc_printtextbuf, msg, MAX_INPUTLINE);
 513                 CL_VM_Parse_Print(cl.csqc_printtextbuf);
 514                 cl.csqc_printtextbuf[0] = 0;
 515         }
 516         else
 517                 Con_Print(msg);
 518         CSQC_END
 519 }
 520
 521 void CL_VM_Parse_CenterPrint (const char *msg)
 522 {
 523         int restorevm_tempstringsbuf_cursize;
 524         if(!cl.csqc_loaded)
 525         {
 526                 SCR_CenterPrint(msg);
 527                 return;
 528         }
 529         CSQC_BEGIN
 530         if(prog->funcoffsets.CSQC_Parse_CenterPrint)
 531         {
 532                 prog->globals.client->time = cl.time;
 533                 prog->globals.client->self = cl.csqc_server2csqcentitynumber[cl.playerentity];
 534                 restorevm_tempstringsbuf_cursize = vm_tempstringsbuf.cursize;
 535                 PRVM_G_INT(OFS_PARM0) = PRVM_SetTempString(msg);
 536                 PRVM_ExecuteProgram(prog->funcoffsets.CSQC_Parse_CenterPrint, "QC function CSQC_Parse_CenterPrint is missing");
 537                 vm_tempstringsbuf.cursize = restorevm_tempstringsbuf_cursize;
 538         }
 539         else
 540                 SCR_CenterPrint(msg);
 541         CSQC_END
 542 }
 543
 544 void CL_VM_UpdateIntermissionState (int intermission)
 545 {
 546         prvm_eval_t *val;
 547         if(cl.csqc_loaded)
 548         {
 549                 CSQC_BEGIN
 550                 val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.intermission);
 551                 if(val)
 552                         val->_float = intermission;
 553                 CSQC_END
 554         }
 555 }
 556 void CL_VM_UpdateShowingScoresState (int showingscores)
 557 {
 558         prvm_eval_t *val;
 559         if(cl.csqc_loaded)
 560         {
 561                 CSQC_BEGIN
 562                 val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.sb_showscores);
 563                 if(val)
 564                         val->_float = showingscores;
 565                 CSQC_END
 566         }
 567 }
 568 qboolean CL_VM_Event_Sound(int sound_num, float volume, int channel, float attenuation, int ent, vec3_t pos)
 569 {
 570         qboolean r = false;
 571         if(cl.csqc_loaded)
 572         {
 573                 CSQC_BEGIN
 574                 if(prog->funcoffsets.CSQC_Event_Sound)
 575                 {
 576                         prog->globals.client->time = cl.time;
 577                         prog->globals.client->self = cl.csqc_server2csqcentitynumber[cl.playerentity];
 578                         PRVM_G_FLOAT(OFS_PARM0) = ent;
 579                         PRVM_G_FLOAT(OFS_PARM1) = channel;
 580                         PRVM_G_INT(OFS_PARM2) = PRVM_SetTempString(cl.sound_name[sound_num] );
 581                         PRVM_G_FLOAT(OFS_PARM3) = volume;
 582                         PRVM_G_FLOAT(OFS_PARM4) = attenuation;
 583                         VectorCopy(pos, PRVM_G_VECTOR(OFS_PARM5) );
 584                         PRVM_ExecuteProgram(prog->funcoffsets.CSQC_Event_Sound, "QC function CSQC_Event_Sound is missing");
 585                         r = CSQC_RETURNVAL != 0;
 586                 }
 587                 CSQC_END
 588         }
 589
 590         return r;
 591 }
 592 void CL_VM_UpdateCoopDeathmatchGlobals (int gametype)
 593 {
 594         // Avoid global names for clean(er) coding
 595         int localcoop;
 596         int localdeathmatch;
 597
 598         prvm_eval_t *val;
 599         if(cl.csqc_loaded)
 600         {
 601                 if(gametype == GAME_COOP)
 602                 {
 603                         localcoop = 1;
 604                         localdeathmatch = 0;
 605                 }
 606                 else
 607                 if(gametype == GAME_DEATHMATCH)
 608                 {
 609                         localcoop = 0;
 610                         localdeathmatch = 1;
 611                 }
 612                 else
 613                 {
 614                         // How did the ServerInfo send an unknown gametype?
 615                         // Better just assign the globals as 0...
 616                         localcoop = 0;
 617                         localdeathmatch = 0;
 618                 }
 619                 CSQC_BEGIN
 620                 val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.coop);
 621                 if(val)
 622                         val->_float = localcoop;
 623                 val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.deathmatch);
 624                 if(val)
 625                         val->_float = localdeathmatch;
 626                 CSQC_END
 627         }
 628 }
 629 float CL_VM_Event (float event)         //[515]: needed ? I'd say "YES", but don't know for what :D
 630 {
 631         float r = 0;
 632         if(!cl.csqc_loaded)
 633                 return 0;
 634         CSQC_BEGIN
 635         if(prog->funcoffsets.CSQC_Event)
 636         {
 637                 prog->globals.client->time = cl.time;
 638                 prog->globals.client->self = cl.csqc_server2csqcentitynumber[cl.playerentity];
 639                 PRVM_G_FLOAT(OFS_PARM0) = event;
 640                 PRVM_ExecuteProgram(prog->funcoffsets.CSQC_Event, "QC function CSQC_Event is missing");
 641                 r = CSQC_RETURNVAL;
 642         }
 643         CSQC_END
 644         return r;
 645 }
 646
 647 void CSQC_ReadEntities (void)
 648 {
 649         unsigned short entnum, oldself, realentnum;
 650         if(!cl.csqc_loaded)
 651         {
 652                 Host_Error ("CSQC_ReadEntities: CSQC is not loaded");
 653                 return;
 654         }
 655
 656         CSQC_BEGIN
 657                 prog->globals.client->time = cl.time;
 658                 oldself = prog->globals.client->self;
 659                 while(1)
 660                 {
 661                         entnum = MSG_ReadShort();
 662                         if(!entnum || msg_badread)
 663                                 return;
 664                         realentnum = entnum & 0x7FFF;
 665                         prog->globals.client->self = cl.csqc_server2csqcentitynumber[realentnum];
 666                         if(entnum & 0x8000)
 667                         {
 668                                 if(prog->globals.client->self)
 669                                 {
 670                                         PRVM_ExecuteProgram(prog->funcoffsets.CSQC_Ent_Remove, "QC function CSQC_Ent_Remove is missing");
 671                                         cl.csqc_server2csqcentitynumber[realentnum] = 0;
 672                                 }
 673                                 else
 674                                 {
 675                                         // LordHavoc: removing an entity that is already gone on
 676                                         // the csqc side is possible for legitimate reasons (such
 677                                         // as a repeat of the remove message), so no warning is
 678                                         // needed
 679                                         //Con_Printf("Bad csqc_server2csqcentitynumber map\n"); //[515]: never happens ?
 680                                 }
 681                         }
 682                         else
 683                         {
 684                                 if(!prog->globals.client->self)
 685                                 {
 686                                         if(!prog->funcoffsets.CSQC_Ent_Spawn)
 687                                         {
 688                                                 prvm_edict_t    *ed;
 689                                                 ed = PRVM_ED_Alloc();
 690                                                 ed->fields.client->entnum = realentnum;
 691                                                 prog->globals.client->self = cl.csqc_server2csqcentitynumber[realentnum] = PRVM_EDICT_TO_PROG(ed);
 692                                         }
 693                                         else
 694                                         {
 695                                                 // entity( float entnum ) CSQC_Ent_Spawn;
 696                                                 // the qc function should set entnum, too (this way it also can return world [2/1/2008 Andreas]
 697                                                 PRVM_G_FLOAT(OFS_PARM0) = (float) realentnum;
 698                                                 // make sure no one gets wrong ideas
 699                                                 prog->globals.client->self = 0;
 700                                                 PRVM_ExecuteProgram(prog->funcoffsets.CSQC_Ent_Spawn, "QC function CSQC_Ent_Spawn is missing");
 701                                                 prog->globals.client->self = cl.csqc_server2csqcentitynumber[realentnum] = PRVM_EDICT( PRVM_G_INT( OFS_RETURN ) );
 702                                         }
 703                                         PRVM_G_FLOAT(OFS_PARM0) = 1;
 704                                         PRVM_ExecuteProgram(prog->funcoffsets.CSQC_Ent_Update, "QC function CSQC_Ent_Update is missing");
 705                                 }
 706                                 else {
 707                                         PRVM_G_FLOAT(OFS_PARM0) = 0;
 708                                         PRVM_ExecuteProgram(prog->funcoffsets.CSQC_Ent_Update, "QC function CSQC_Ent_Update is missing");
 709                                 }
 710                         }
 711                 }
 712                 prog->globals.client->self = oldself;
 713         CSQC_END
 714 }
 715
 716 void CL_VM_CB_BeginIncreaseEdicts(void)
 717 {
 718         // links don't survive the transition, so unlink everything
 719         World_UnlinkAll(&cl.world);
 720 }
 721
 722 void CL_VM_CB_EndIncreaseEdicts(void)
 723 {
 724         int i;
 725         prvm_edict_t *ent;
 726
 727         // link every entity except world
 728         for (i = 1, ent = prog->edicts;i < prog->max_edicts;i++, ent++)
 729                 if (!ent->priv.server->free)
 730                         CL_LinkEdict(ent);
 731 }
 732
 733 void CL_VM_CB_InitEdict(prvm_edict_t *e)
 734 {
 735         int edictnum = PRVM_NUM_FOR_EDICT(e);
 736         entity_render_t *entrender;
 737         CL_ExpandCSQCRenderEntities(edictnum);
 738         entrender = cl.csqcrenderentities + edictnum;
 739         e->priv.server->move = false; // don't move on first frame
 740         memset(entrender, 0, sizeof(*entrender));
 741         entrender->shadertime = cl.time;
 742 }
 743
 744 extern void R_DecalSystem_Reset(decalsystem_t *decalsystem);
 745
 746 void CL_VM_CB_FreeEdict(prvm_edict_t *ed)
 747 {
 748         entity_render_t *entrender = cl.csqcrenderentities + PRVM_NUM_FOR_EDICT(ed);
 749         R_DecalSystem_Reset(&entrender->decalsystem);
 750         memset(entrender, 0, sizeof(*entrender));
 751         World_UnlinkEdict(ed);
 752         memset(ed->fields.client, 0, sizeof(*ed->fields.client));
 753         World_Physics_RemoveFromEntity(&cl.world, ed);
 754         World_Physics_RemoveJointFromEntity(&cl.world, ed);
 755 }
 756
 757 void CL_VM_CB_CountEdicts(void)
 758 {
 759         int             i;
 760         prvm_edict_t    *ent;
 761         int             active = 0, models = 0, solid = 0;
 762
 763         for (i=0 ; i<prog->num_edicts ; i++)
 764         {
 765                 ent = PRVM_EDICT_NUM(i);
 766                 if (ent->priv.server->free)
 767                         continue;
 768                 active++;
 769                 if (ent->fields.client->solid)
 770                         solid++;
 771                 if (ent->fields.client->model)
 772                         models++;
 773         }
 774
 775         Con_Printf("num_edicts:%3i\n", prog->num_edicts);
 776         Con_Printf("active    :%3i\n", active);
 777         Con_Printf("view      :%3i\n", models);
 778         Con_Printf("touch     :%3i\n", solid);
 779 }
 780
 781 qboolean CL_VM_CB_LoadEdict(prvm_edict_t *ent)
 782 {
 783         return true;
 784 }
 785
 786 void Cmd_ClearCsqcFuncs (void);
 787
 788 // returns true if the packet is valid, false if end of file is reached
 789 // used for dumping the CSQC download into demo files
 790 qboolean MakeDownloadPacket(const char *filename, unsigned char *data, unsigned long len, int crc, int cnt, sizebuf_t *buf, int protocol)
 791 {
 792         int packetsize = buf->maxsize - 7; // byte short long
 793         int npackets = (len + packetsize - 1) / (packetsize);
 794
 795         if(protocol == PROTOCOL_QUAKEWORLD)
 796                 return false; // CSQC can't run in QW anyway
 797
 798         SZ_Clear(buf);
 799         if(cnt == 0)
 800         {
 801                 MSG_WriteByte(buf, svc_stufftext);
 802                 MSG_WriteString(buf, va("\ncl_downloadbegin %lu %s\n", len, filename));
 803                 return true;
 804         }
 805         else if(cnt >= 1 && cnt <= npackets)
 806         {
 807                 unsigned long thispacketoffset = (cnt - 1) * packetsize;
 808                 int thispacketsize = len - thispacketoffset;
 809                 if(thispacketsize > packetsize)
 810                         thispacketsize = packetsize;
 811
 812                 MSG_WriteByte(buf, svc_downloaddata);
 813                 MSG_WriteLong(buf, thispacketoffset);
 814                 MSG_WriteShort(buf, thispacketsize);
 815                 SZ_Write(buf, data + thispacketoffset, thispacketsize);
 816
 817                 return true;
 818         }
 819         else if(cnt == npackets + 1)
 820         {
 821                 MSG_WriteByte(buf, svc_stufftext);
 822                 MSG_WriteString(buf, va("\ncl_downloadfinished %lu %d\n", len, crc));
 823                 return true;
 824         }
 825         return false;
 826 }
 827
 828 void CL_VM_Init (void)
 829 {
 830         const char* csprogsfn;
 831         unsigned char *csprogsdata;
 832         fs_offset_t csprogsdatasize;
 833         int csprogsdatacrc, requiredcrc;
 834         int requiredsize;
 835         prvm_eval_t *val;
 836
 837         // reset csqc_progcrc after reading it, so that changing servers doesn't
 838         // expect csqc on the next server
 839         requiredcrc = csqc_progcrc.integer;
 840         requiredsize = csqc_progsize.integer;
 841         Cvar_SetValueQuick(&csqc_progcrc, -1);
 842         Cvar_SetValueQuick(&csqc_progsize, -1);
 843
 844         // if the server is not requesting a csprogs, then we're done here
 845         if (requiredcrc < 0)
 846                 return;
 847
 848         // see if the requested csprogs.dat file matches the requested crc
 849         csprogsdatacrc = -1;
 850         csprogsfn = va("dlcache/%s.%i.%i", csqc_progname.string, requiredsize, requiredcrc);
 851         csprogsdata = FS_LoadFile(csprogsfn, tempmempool, true, &csprogsdatasize);
 852         if (!csprogsdata)
 853         {
 854                 csprogsfn = csqc_progname.string;
 855                 csprogsdata = FS_LoadFile(csprogsfn, tempmempool, true, &csprogsdatasize);
 856         }
 857         if (csprogsdata)
 858         {
 859                 csprogsdatacrc = CRC_Block(csprogsdata, csprogsdatasize);
 860                 if (csprogsdatacrc != requiredcrc || csprogsdatasize != requiredsize)
 861                 {
 862                         if (cls.demoplayback)
 863                         {
 864                                 Con_Printf("^1Warning: Your %s is not the same version as the demo was recorded with (CRC/size are %i/%i but should be %i/%i)\n", csqc_progname.string, csprogsdatacrc, (int)csprogsdatasize, requiredcrc, requiredsize);
 865                                 // Mem_Free(csprogsdata);
 866                                 // return;
 867                                 // We WANT to continue here, and play the demo with different csprogs!
 868                                 // After all, this is just a warning. Sure things may go wrong from here.
 869                         }
 870                         else
 871                         {
 872                                 Mem_Free(csprogsdata);
 873                                 Con_Printf("^1Your %s is not the same version as the server (CRC is %i/%i but should be %i/%i)\n", csqc_progname.string, csprogsdatacrc, (int)csprogsdatasize, requiredcrc, requiredsize);
 874                                 CL_Disconnect();
 875                                 return;
 876                         }
 877                 }
 878         }
 879         else
 880         {
 881                 if (requiredcrc >= 0)
 882                 {
 883                         if (cls.demoplayback)
 884                                 Con_Printf("CL_VM_Init: demo requires CSQC, but \"%s\" wasn't found\n", csqc_progname.string);
 885                         else
 886                                 Con_Printf("CL_VM_Init: server requires CSQC, but \"%s\" wasn't found\n", csqc_progname.string);
 887                         CL_Disconnect();
 888                 }
 889                 return;
 890         }
 891
 892         PRVM_Begin;
 893         PRVM_InitProg(PRVM_CLIENTPROG);
 894
 895         // allocate the mempools
 896         prog->progs_mempool = Mem_AllocPool(csqc_progname.string, 0, NULL);
 897         prog->headercrc = CL_PROGHEADER_CRC;
 898         prog->edictprivate_size = 0; // no private struct used
 899         prog->name = CL_NAME;
 900         prog->num_edicts = 1;
 901         prog->max_edicts = 512;
 902         prog->limit_edicts = CL_MAX_EDICTS;
 903         prog->reserved_edicts = 0;
 904         prog->edictprivate_size = sizeof(edict_engineprivate_t);
 905         // TODO: add a shared extension string #define and add real support for csqc extension strings [12/5/2007 Black]
 906         prog->extensionstring = vm_sv_extensions;
 907         prog->builtins = vm_cl_builtins;
 908         prog->numbuiltins = vm_cl_numbuiltins;
 909         prog->begin_increase_edicts = CL_VM_CB_BeginIncreaseEdicts;
 910         prog->end_increase_edicts = CL_VM_CB_EndIncreaseEdicts;
 911         prog->init_edict = CL_VM_CB_InitEdict;
 912         prog->free_edict = CL_VM_CB_FreeEdict;
 913         prog->count_edicts = CL_VM_CB_CountEdicts;
 914         prog->load_edict = CL_VM_CB_LoadEdict;
 915         prog->init_cmd = VM_CL_Cmd_Init;
 916         prog->reset_cmd = VM_CL_Cmd_Reset;
 917         prog->error_cmd = CL_VM_Error;
 918         prog->ExecuteProgram = CLVM_ExecuteProgram;
 919
 920         PRVM_LoadProgs(csprogsfn, cl_numrequiredfunc, cl_required_func, 0, NULL, 0, NULL);
 921
 922         if (!prog->loaded)
 923         {
 924                 CL_VM_Error("CSQC %s ^2failed to load\n", csprogsfn);
 925                 if(!sv.active)
 926                         CL_Disconnect();
 927                 Mem_Free(csprogsdata);
 928                 return;
 929         }
 930
 931         Con_Printf("CSQC %s ^5loaded (crc=%i, size=%i)\n", csprogsfn, csprogsdatacrc, (int)csprogsdatasize);
 932
 933         if(cls.demorecording)
 934         {
 935                 if(cls.demo_lastcsprogssize != csprogsdatasize || cls.demo_lastcsprogscrc != csprogsdatacrc)
 936                 {
 937                         int i;
 938                         char buf[NET_MAXMESSAGE];
 939                         sizebuf_t sb;
 940                         unsigned char *demobuf; fs_offset_t demofilesize;
 941
 942                         sb.data = (unsigned char *) buf;
 943                         sb.maxsize = sizeof(buf);
 944                         i = 0;
 945
 946                         CL_CutDemo(&demobuf, &demofilesize);
 947                         while(MakeDownloadPacket(csqc_progname.string, csprogsdata, csprogsdatasize, csprogsdatacrc, i++, &sb, cls.protocol))
 948                                 CL_WriteDemoMessage(&sb);
 949                         CL_PasteDemo(&demobuf, &demofilesize);
 950
 951                         cls.demo_lastcsprogssize = csprogsdatasize;
 952                         cls.demo_lastcsprogscrc = csprogsdatacrc;
 953                 }
 954         }
 955         Mem_Free(csprogsdata);
 956
 957         // check if OP_STATE animation is possible in this dat file
 958         if (prog->fieldoffsets.nextthink >= 0 && prog->fieldoffsets.frame >= 0 && prog->fieldoffsets.think >= 0 && prog->globaloffsets.self >= 0)
 959                 prog->flag |= PRVM_OP_STATE;
 960
 961         // set time
 962         prog->globals.client->time = cl.time;
 963         prog->globals.client->self = 0;
 964
 965         prog->globals.client->mapname = cl.worldmodel ? PRVM_SetEngineString(cl.worldmodel->name) : PRVM_SetEngineString("");
 966         prog->globals.client->player_localentnum = cl.playerentity;
 967
 968         // set map description (use world entity 0)
 969         val = PRVM_EDICTFIELDVALUE(prog->edicts, prog->fieldoffsets.message);
 970         if(val)
 971                 val->string = PRVM_SetEngineString(cl.levelname);
 972         VectorCopy(cl.world.mins, prog->edicts->fields.client->mins);
 973         VectorCopy(cl.world.maxs, prog->edicts->fields.client->maxs);
 974
 975         // call the prog init
 976         PRVM_ExecuteProgram(prog->funcoffsets.CSQC_Init, "QC function CSQC_Init is missing");
 977
 978         PRVM_End;
 979         cl.csqc_loaded = true;
 980
 981         cl.csqc_vidvars.drawcrosshair = false;
 982         cl.csqc_vidvars.drawenginesbar = false;
 983
 984         // Update Coop and Deathmatch Globals (at this point the client knows them from ServerInfo)
 985         CL_VM_UpdateCoopDeathmatchGlobals(cl.gametype);
 986 }
 987
 988 void CL_VM_ShutDown (void)
 989 {
 990         Cmd_ClearCsqcFuncs();
 991         //Cvar_SetValueQuick(&csqc_progcrc, -1);
 992         //Cvar_SetValueQuick(&csqc_progsize, -1);
 993         if(!cl.csqc_loaded)
 994                 return;
 995         CSQC_BEGIN
 996                 prog->globals.client->time = cl.time;
 997                 prog->globals.client->self = 0;
 998                 if (prog->funcoffsets.CSQC_Shutdown)
 999                         PRVM_ExecuteProgram(prog->funcoffsets.CSQC_Shutdown, "QC function CSQC_Shutdown is missing");
1000                 PRVM_ResetProg();
1001         CSQC_END
1002         Con_Print("CSQC ^1unloaded\n");
1003         cl.csqc_loaded = false;
1004 }
1005
1006 qboolean CL_VM_GetEntitySoundOrigin(int entnum, vec3_t out)
1007 {
1008         prvm_edict_t *ed;
1009         dp_model_t *mod;
1010         matrix4x4_t matrix;
1011         qboolean r = 0;
1012
1013         CSQC_BEGIN;
1014
1015         // FIXME consider attachments here!
1016
1017         ed = PRVM_EDICT_NUM(entnum - MAX_EDICTS);
1018
1019         if(!ed->priv.required->free)
1020         {
1021                 mod = CL_GetModelFromEdict(ed);
1022                 VectorCopy(ed->fields.client->origin, out);
1023                 if(CL_GetTagMatrix (&matrix, ed, 0) == 0)
1024                         Matrix4x4_OriginFromMatrix(&matrix, out);
1025                 if (mod && mod->soundfromcenter)
1026                         VectorMAMAM(1.0f, out, 0.5f, mod->normalmins, 0.5f, mod->normalmaxs, out);
1027                 r = 1;
1028         }
1029
1030         CSQC_END;
1031
1032         return r;
1033 }
1034
1035 void CL_LoadFrameGroupBlend(prvm_edict_t *ed, entity_render_t *entrender)
1036 {
1037         prvm_eval_t *val;
1038         // self.frame is the interpolation target (new frame)
1039         // self.frame1time is the animation base time for the interpolation target
1040         // self.frame2 is the interpolation start (previous frame)
1041         // self.frame2time is the animation base time for the interpolation start
1042         // self.lerpfrac is the interpolation strength for self.frame
1043         // 3+ are for additional blends (the main use for this feature is lerping
1044         // pitch angle on a player model where the animator set up 5 sets of
1045         // animations and the csqc simply lerps between sets)
1046         entrender->framegroupblend[0].frame = entrender->framegroupblend[1].frame = (int) ed->fields.client->frame;
1047         if ((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.frame2))) entrender->framegroupblend[1].frame = (int) val->_float;
1048         if ((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.frame3))) entrender->framegroupblend[2].frame = (int) val->_float;
1049         if ((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.frame4))) entrender->framegroupblend[3].frame = (int) val->_float;
1050         if ((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.frame1time))) entrender->framegroupblend[0].start = val->_float;
1051         if ((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.frame2time))) entrender->framegroupblend[1].start = val->_float;
1052         if ((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.frame3time))) entrender->framegroupblend[2].start = val->_float;
1053         if ((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.frame4time))) entrender->framegroupblend[3].start = val->_float;
1054         if ((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.lerpfrac))) entrender->framegroupblend[0].lerp = val->_float;
1055         if ((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.lerpfrac3))) entrender->framegroupblend[2].lerp = val->_float;
1056         if ((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.lerpfrac4))) entrender->framegroupblend[3].lerp = val->_float;
1057         if ((val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.shadertime))) entrender->shadertime = val->_float;
1058         // assume that the (missing) lerpfrac2 is whatever remains after lerpfrac+lerpfrac3+lerpfrac4 are summed
1059         entrender->framegroupblend[1].lerp = 1 - entrender->framegroupblend[0].lerp - entrender->framegroupblend[2].lerp - entrender->framegroupblend[3].lerp;
1060 }
1061
1062 int CL_BlendTagMatrix(entity_render_t *entrender, int tagindex, matrix4x4_t *blendmatrix)
1063 {
1064         int j, l, k;
1065         int ret;
1066         float d;
1067         dp_model_t *model = entrender->model;
1068         // blend the matrices
1069         memset(blendmatrix, 0, sizeof(*blendmatrix));
1070         for (j = 0;j < MAX_FRAMEBLENDS && entrender->frameblend[j].lerp > 0;j++)
1071         {
1072                 matrix4x4_t tagmatrix;
1073                 ret = Mod_Alias_GetTagMatrix(model, entrender->frameblend[j].subframe, tagindex, &tagmatrix);
1074                 if(ret)
1075                         return ret;
1076                 d = entrender->frameblend[j].lerp;
1077                 for (l = 0;l < 4;l++)
1078                         for (k = 0;k < 4;k++)
1079                                 blendmatrix->m[l][k] += d * tagmatrix.m[l][k];
1080         }
1081         return 0;
1082 }