cl_collision.c

   1
   2 #include "quakedef.h"
   3 #include "cl_collision.h"
   4
   5 /*
   6 // not yet used
   7 typedef struct physentity_s
   8 {
   9         // this may be a entity_t, or a prvm_edict_t, or whatever
  10         void *realentity;
  11
  12         // can be NULL if it is a bbox object
  13         model_t *bmodel;
  14
  15         // node this entity crosses
  16         // for avoiding unnecessary collisions
  17         physnode_t *node;
  18
  19         // matrix for converting from model to world coordinates
  20         double modeltoworldmatrix[3][4];
  21
  22         // matrix for converting from world to model coordinates
  23         double worldtomodelmatrix[3][4];
  24
  25         // if this is a bmodel, this is used for culling it quickly
  26         // if this is not a bmodel, this is used for actual collisions
  27         double mins[3], maxs[3];
  28 }
  29 physentity_t;
  30 */
  31
  32 trace_t CL_TraceBox(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int hitbmodels, int *hitent, int hitsupercontentsmask, qboolean hitplayers)
  33 {
  34         int n;
  35         entity_render_t *ent;
  36         vec3_t tracemins, tracemaxs;
  37         trace_t cliptrace, trace;
  38         vec3_t origin;
  39         vec3_t starttransformed, endtransformed, starttransformedmins, endtransformedmins, starttransformedmaxs, endtransformedmaxs;
  40         vec3_t startmins, startmaxs, endmins, endmaxs, entmins, entmaxs;
  41         vec_t *playermins, *playermaxs;
  42
  43         VectorAdd(start, mins, startmins);
  44         VectorAdd(start, maxs, startmaxs);
  45         VectorAdd(end, mins, endmins);
  46         VectorAdd(end, maxs, endmaxs);
  47
  48         memset (&cliptrace, 0 , sizeof(trace_t));
  49         cliptrace.fraction = 1;
  50         cliptrace.realfraction = 1;
  51
  52         if (cl.worldmodel && cl.worldmodel->TraceBox)
  53                 cl.worldmodel->TraceBox(cl.worldmodel, 0, &cliptrace, startmins, startmaxs, endmins, endmaxs, hitsupercontentsmask);
  54
  55         if (hitent)
  56                 *hitent = 0;
  57
  58         if (hitbmodels && cl_num_brushmodel_entities)
  59         {
  60                 tracemins[0] = min(start[0], end[0]) + mins[0];
  61                 tracemaxs[0] = max(start[0], end[0]) + maxs[0];
  62                 tracemins[1] = min(start[1], end[1]) + mins[1];
  63                 tracemaxs[1] = max(start[1], end[1]) + maxs[1];
  64                 tracemins[2] = min(start[2], end[2]) + mins[2];
  65                 tracemaxs[2] = max(start[2], end[2]) + maxs[2];
  66
  67                 // look for embedded bmodels
  68                 for (n = 0;n < cl_num_brushmodel_entities;n++)
  69                 {
  70                         ent = &cl_entities[cl_brushmodel_entities[n]].render;
  71                         if (!BoxesOverlap(tracemins, tracemaxs, ent->mins, ent->maxs))
  72                                 continue;
  73
  74                         Matrix4x4_Transform(&ent->inversematrix, start, starttransformed);
  75                         Matrix4x4_Transform(&ent->inversematrix, end, endtransformed);
  76                         VectorAdd(starttransformed, mins, starttransformedmins);
  77                         VectorAdd(starttransformed, maxs, starttransformedmaxs);
  78                         VectorAdd(endtransformed, mins, endtransformedmins);
  79                         VectorAdd(endtransformed, maxs, endtransformedmaxs);
  80
  81                         memset (&trace, 0 , sizeof(trace_t));
  82                         trace.fraction = 1;
  83                         trace.realfraction = 1;
  84
  85                         if (ent->model && ent->model->TraceBox)
  86                                 ent->model->TraceBox(ent->model, 0, &trace, starttransformedmins, starttransformedmaxs, endtransformedmins, endtransformedmaxs, hitsupercontentsmask);
  87
  88                         // LordHavoc: take the 'best' answers from the new trace and combine with existing data
  89                         if (trace.allsolid)
  90                                 cliptrace.allsolid = true;
  91                         if (trace.startsolid)
  92                         {
  93                                 cliptrace.startsolid = true;
  94                                 if (cliptrace.realfraction == 1)
  95                                         if (hitent)
  96                                                 *hitent = cl_brushmodel_entities[n];
  97                         }
  98                         // don't set this except on the world, because it can easily confuse
  99                         // monsters underwater if there's a bmodel involved in the trace
 100                         // (inopen && inwater is how they check water visibility)
 101                         //if (trace.inopen)
 102                         //      cliptrace.inopen = true;
 103                         if (trace.inwater)
 104                                 cliptrace.inwater = true;
 105                         if (trace.realfraction < cliptrace.realfraction)
 106                         {
 107                                 cliptrace.fraction = trace.fraction;
 108                                 cliptrace.realfraction = trace.realfraction;
 109                                 cliptrace.plane = trace.plane;
 110                                 if (hitent)
 111                                         *hitent = cl_brushmodel_entities[n];
 112                                 Matrix4x4_Transform3x3(&ent->matrix, trace.plane.normal, cliptrace.plane.normal);
 113                         }
 114                         cliptrace.startsupercontents |= trace.startsupercontents;
 115                 }
 116         }
 117         if (hitplayers)
 118         {
 119                 tracemins[0] = min(start[0], end[0]) + mins[0];
 120                 tracemaxs[0] = max(start[0], end[0]) + maxs[0];
 121                 tracemins[1] = min(start[1], end[1]) + mins[1];
 122                 tracemaxs[1] = max(start[1], end[1]) + maxs[1];
 123                 tracemins[2] = min(start[2], end[2]) + mins[2];
 124                 tracemaxs[2] = max(start[2], end[2]) + maxs[2];
 125
 126                 for (n = 1;n < cl.maxclients+1;n++)
 127                 {
 128                         if (n != cl.playerentity)
 129                         {
 130                                 ent = &cl_entities[n].render;
 131                                 // FIXME: crouch
 132                                 playermins = cl_playerstandmins;
 133                                 playermaxs = cl_playerstandmaxs;
 134                                 Matrix4x4_OriginFromMatrix(&ent->matrix, origin);
 135                                 VectorAdd(origin, playermins, entmins);
 136                                 VectorAdd(origin, playermaxs, entmaxs);
 137                                 if (!BoxesOverlap(tracemins, tracemaxs, entmins, entmaxs))
 138                                         continue;
 139
 140                                 memset (&trace, 0 , sizeof(trace_t));
 141                                 trace.fraction = 1;
 142                                 trace.realfraction = 1;
 143
 144                                 Matrix4x4_Transform(&ent->inversematrix, start, starttransformed);
 145                                 Matrix4x4_Transform(&ent->inversematrix, end, endtransformed);
 146                                 Collision_ClipTrace_Box(&trace, playermins, playermaxs, starttransformed, mins, maxs, endtransformed, hitsupercontentsmask, SUPERCONTENTS_SOLID);
 147
 148                                 // LordHavoc: take the 'best' answers from the new trace and combine with existing data
 149                                 if (trace.allsolid)
 150                                         cliptrace.allsolid = true;
 151                                 if (trace.startsolid)
 152                                 {
 153                                         cliptrace.startsolid = true;
 154                                         if (cliptrace.realfraction == 1)
 155                                                 if (hitent)
 156                                                         *hitent = n;
 157                                 }
 158                                 // don't set this except on the world, because it can easily confuse
 159                                 // monsters underwater if there's a bmodel involved in the trace
 160                                 // (inopen && inwater is how they check water visibility)
 161                                 //if (trace.inopen)
 162                                 //      cliptrace.inopen = true;
 163                                 if (trace.inwater)
 164                                         cliptrace.inwater = true;
 165                                 if (trace.realfraction < cliptrace.realfraction)
 166                                 {
 167                                         cliptrace.fraction = trace.fraction;
 168                                         cliptrace.realfraction = trace.realfraction;
 169                                         cliptrace.plane = trace.plane;
 170                                         if (hitent)
 171                                                 *hitent = n;
 172                                         Matrix4x4_Transform3x3(&ent->matrix, trace.plane.normal, cliptrace.plane.normal);
 173                                 }
 174                                 cliptrace.startsupercontents |= trace.startsupercontents;
 175                         }
 176                 }
 177         }
 178         cliptrace.fraction = bound(0, cliptrace.fraction, 1);
 179         cliptrace.realfraction = bound(0, cliptrace.realfraction, 1);
 180         VectorLerp(start, cliptrace.fraction, end, cliptrace.endpos);
 181         return cliptrace;
 182 }
 183
 184 float CL_SelectTraceLine(const vec3_t start, const vec3_t end, vec3_t impact, vec3_t normal, int *hitent, entity_render_t *ignoreent, qboolean csqcents)
 185 {
 186         float maxfrac, maxrealfrac;
 187         int n, entsnum;
 188         entity_t *entlist;
 189         unsigned char *entactivelist;
 190         entity_render_t *ent;
 191         float tracemins[3], tracemaxs[3];
 192         trace_t trace;
 193         float tempnormal[3], starttransformed[3], endtransformed[3];
 194
 195         memset (&trace, 0 , sizeof(trace_t));
 196         trace.fraction = 1;
 197         trace.realfraction = 1;
 198         VectorCopy (end, trace.endpos);
 199
 200         if (hitent)
 201                 *hitent = 0;
 202         if (cl.worldmodel && cl.worldmodel->TraceBox)
 203                 cl.worldmodel->TraceBox(cl.worldmodel, 0, &trace, start, start, end, end, SUPERCONTENTS_SOLID);
 204
 205         if (normal)
 206                 VectorCopy(trace.plane.normal, normal);
 207         //cl_traceline_startsupercontents = trace.startsupercontents;
 208         maxfrac = trace.fraction;
 209         maxrealfrac = trace.realfraction;
 210
 211         tracemins[0] = min(start[0], end[0]);
 212         tracemaxs[0] = max(start[0], end[0]);
 213         tracemins[1] = min(start[1], end[1]);
 214         tracemaxs[1] = max(start[1], end[1]);
 215         tracemins[2] = min(start[2], end[2]);
 216         tracemaxs[2] = max(start[2], end[2]);
 217
 218         if(csqcents)
 219         {
 220                 entlist = cl_csqcentities;
 221                 entactivelist = cl_csqcentities_active;
 222                 entsnum = cl_num_csqcentities;
 223         }
 224         else
 225         {
 226                 entlist = cl_entities;
 227                 entactivelist = cl_entities_active;
 228                 entsnum = cl_num_entities;
 229         }
 230
 231         // look for embedded bmodels
 232         for (n = 0;n < entsnum;n++)
 233         {
 234                 if (!entactivelist[n])
 235                         continue;
 236                 ent = &entlist[n].render;
 237                 if (!BoxesOverlap(ent->mins, ent->maxs, tracemins, tracemaxs))
 238                         continue;
 239                 if (!ent->model || !ent->model->TraceBox)
 240                         continue;
 241                 if ((ent->flags & RENDER_EXTERIORMODEL) && !chase_active.integer)
 242                         continue;
 243                 // if transparent and not selectable, skip entity
 244                 if (!(entlist[n].state_current.effects & EF_SELECTABLE) && (ent->alpha < 1 || (ent->effects & (EF_ADDITIVE | EF_NODEPTHTEST))))
 245                         continue;
 246                 if (ent == ignoreent)
 247                         continue;
 248                 Matrix4x4_Transform(&ent->inversematrix, start, starttransformed);
 249                 Matrix4x4_Transform(&ent->inversematrix, end, endtransformed);
 250
 251                 if (ent->model && ent->model->TraceBox)
 252                         ent->model->TraceBox(ent->model, ent->frameblend[0].frame, &trace, starttransformed, starttransformed, endtransformed, endtransformed, SUPERCONTENTS_SOLID);
 253
 254                 //cl_traceline_startsupercontents |= trace.startsupercontents;
 255                 if (maxrealfrac > trace.realfraction)
 256                 {
 257                         if (hitent)
 258                                 *hitent = n;
 259                         maxfrac = trace.fraction;
 260                         maxrealfrac = trace.realfraction;
 261                         if (normal)
 262                         {
 263                                 VectorCopy(trace.plane.normal, tempnormal);
 264                                 Matrix4x4_Transform3x3(&ent->matrix, tempnormal, normal);
 265                         }
 266                 }
 267         }
 268         maxfrac = bound(0, maxfrac, 1);
 269         maxrealfrac = bound(0, maxrealfrac, 1);
 270         //if (maxfrac < 0 || maxfrac > 1) Con_Printf("fraction out of bounds %f %s:%d\n", maxfrac, __FILE__, __LINE__);
 271         if (impact)
 272                 VectorLerp(start, maxfrac, end, impact);
 273         return maxfrac;
 274 }
 275
 276 void CL_FindNonSolidLocation(const vec3_t in, vec3_t out, vec_t radius)
 277 {
 278         // FIXME: check multiple brush models
 279         if (cl.worldmodel && cl.worldmodel->brush.FindNonSolidLocation)
 280                 cl.worldmodel->brush.FindNonSolidLocation(cl.worldmodel, in, out, radius);
 281 }
 282
 283 int CL_PointQ1Contents(const vec3_t p)
 284 {
 285         return Mod_Q1BSP_NativeContentsFromSuperContents(NULL, CL_TraceBox(p, vec3_origin, vec3_origin, p, true, NULL, 0, false).startsupercontents);
 286         /*
 287         // FIXME: check multiple brush models
 288         if (cl.worldmodel && cl.worldmodel->brush.PointContentsQ1)
 289                 return cl.worldmodel->brush.PointContentsQ1(cl.worldmodel, p);
 290         return 0;
 291         */
 292 }
 293
 294 int CL_PointSuperContents(const vec3_t p)
 295 {
 296         return CL_TraceBox(p, vec3_origin, vec3_origin, p, true, NULL, 0, false).startsupercontents;
 297         /*
 298         // FIXME: check multiple brush models
 299         if (cl.worldmodel && cl.worldmodel->brush.PointContentsQ1)
 300                 return cl.worldmodel->brush.PointContentsQ1(cl.worldmodel, p);
 301         return 0;
 302         */
 303 }
 304