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;
  40         vec3_t entmins, entmaxs;
  41         vec_t *playermins, *playermaxs;
  42
  43         memset (&cliptrace, 0 , sizeof(trace_t));
  44         cliptrace.fraction = 1;
  45         cliptrace.realfraction = 1;
  46
  47         if (cl.worldmodel && cl.worldmodel->TraceBox)
  48                 cl.worldmodel->TraceBox(cl.worldmodel, 0, &cliptrace, start, mins, maxs, end, hitsupercontentsmask);
  49
  50         if (hitent)
  51                 *hitent = 0;
  52
  53         if (hitbmodels && cl.num_brushmodel_entities)
  54         {
  55                 tracemins[0] = min(start[0], end[0]) + mins[0];
  56                 tracemaxs[0] = max(start[0], end[0]) + maxs[0];
  57                 tracemins[1] = min(start[1], end[1]) + mins[1];
  58                 tracemaxs[1] = max(start[1], end[1]) + maxs[1];
  59                 tracemins[2] = min(start[2], end[2]) + mins[2];
  60                 tracemaxs[2] = max(start[2], end[2]) + maxs[2];
  61
  62                 // look for embedded bmodels
  63                 for (n = 0;n < cl.num_brushmodel_entities;n++)
  64                 {
  65                         ent = &cl.entities[cl.brushmodel_entities[n]].render;
  66                         if (!BoxesOverlap(tracemins, tracemaxs, ent->mins, ent->maxs))
  67                                 continue;
  68
  69                         Matrix4x4_Transform(&ent->inversematrix, start, starttransformed);
  70                         Matrix4x4_Transform(&ent->inversematrix, end, endtransformed);
  71
  72                         memset (&trace, 0 , sizeof(trace_t));
  73                         trace.fraction = 1;
  74                         trace.realfraction = 1;
  75
  76                         if (ent->model && ent->model->TraceBox)
  77                                 ent->model->TraceBox(ent->model, 0, &trace, starttransformed, mins, maxs, endtransformed, hitsupercontentsmask);
  78
  79                         // LordHavoc: take the 'best' answers from the new trace and combine with existing data
  80                         if (trace.allsolid)
  81                                 cliptrace.allsolid = true;
  82                         if (trace.startsolid)
  83                         {
  84                                 cliptrace.startsolid = true;
  85                                 if (cliptrace.realfraction == 1)
  86                                         if (hitent)
  87                                                 *hitent = cl.brushmodel_entities[n];
  88                         }
  89                         // don't set this except on the world, because it can easily confuse
  90                         // monsters underwater if there's a bmodel involved in the trace
  91                         // (inopen && inwater is how they check water visibility)
  92                         //if (trace.inopen)
  93                         //      cliptrace.inopen = true;
  94                         if (trace.inwater)
  95                                 cliptrace.inwater = true;
  96                         if (trace.realfraction < cliptrace.realfraction)
  97                         {
  98                                 cliptrace.fraction = trace.fraction;
  99                                 cliptrace.realfraction = trace.realfraction;
 100                                 cliptrace.plane = trace.plane;
 101                                 if (hitent)
 102                                         *hitent = cl.brushmodel_entities[n];
 103                                 Matrix4x4_Transform3x3(&ent->matrix, trace.plane.normal, cliptrace.plane.normal);
 104                                 cliptrace.hitsupercontents = trace.hitsupercontents;
 105                                 cliptrace.hitq3surfaceflags = trace.hitq3surfaceflags;
 106                                 cliptrace.hittexture = trace.hittexture;
 107                         }
 108                         cliptrace.startsupercontents |= trace.startsupercontents;
 109                 }
 110         }
 111         if (hitplayers)
 112         {
 113                 tracemins[0] = min(start[0], end[0]) + mins[0];
 114                 tracemaxs[0] = max(start[0], end[0]) + maxs[0];
 115                 tracemins[1] = min(start[1], end[1]) + mins[1];
 116                 tracemaxs[1] = max(start[1], end[1]) + maxs[1];
 117                 tracemins[2] = min(start[2], end[2]) + mins[2];
 118                 tracemaxs[2] = max(start[2], end[2]) + maxs[2];
 119
 120                 for (n = 1;n < cl.maxclients+1;n++)
 121                 {
 122                         if (n != cl.playerentity)
 123                         {
 124                                 ent = &cl.entities[n].render;
 125                                 // FIXME: crouch
 126                                 playermins = cl.playerstandmins;
 127                                 playermaxs = cl.playerstandmaxs;
 128                                 Matrix4x4_OriginFromMatrix(&ent->matrix, origin);
 129                                 VectorAdd(origin, playermins, entmins);
 130                                 VectorAdd(origin, playermaxs, entmaxs);
 131                                 if (!BoxesOverlap(tracemins, tracemaxs, entmins, entmaxs))
 132                                         continue;
 133
 134                                 memset (&trace, 0 , sizeof(trace_t));
 135                                 trace.fraction = 1;
 136                                 trace.realfraction = 1;
 137
 138                                 Matrix4x4_Transform(&ent->inversematrix, start, starttransformed);
 139                                 Matrix4x4_Transform(&ent->inversematrix, end, endtransformed);
 140                                 Collision_ClipTrace_Box(&trace, playermins, playermaxs, starttransformed, mins, maxs, endtransformed, hitsupercontentsmask, SUPERCONTENTS_BODY, 0, NULL);
 141
 142                                 // LordHavoc: take the 'best' answers from the new trace and combine with existing data
 143                                 if (trace.allsolid)
 144                                         cliptrace.allsolid = true;
 145                                 if (trace.startsolid)
 146                                 {
 147                                         cliptrace.startsolid = true;
 148                                         if (cliptrace.realfraction == 1)
 149                                                 if (hitent)
 150                                                         *hitent = n;
 151                                 }
 152                                 // don't set this except on the world, because it can easily confuse
 153                                 // monsters underwater if there's a bmodel involved in the trace
 154                                 // (inopen && inwater is how they check water visibility)
 155                                 //if (trace.inopen)
 156                                 //      cliptrace.inopen = true;
 157                                 if (trace.inwater)
 158                                         cliptrace.inwater = true;
 159                                 if (trace.realfraction < cliptrace.realfraction)
 160                                 {
 161                                         cliptrace.fraction = trace.fraction;
 162                                         cliptrace.realfraction = trace.realfraction;
 163                                         cliptrace.plane = trace.plane;
 164                                         if (hitent)
 165                                                 *hitent = n;
 166                                         Matrix4x4_Transform3x3(&ent->matrix, trace.plane.normal, cliptrace.plane.normal);
 167                                         cliptrace.hitsupercontents = trace.hitsupercontents;
 168                                         cliptrace.hitq3surfaceflags = trace.hitq3surfaceflags;
 169                                         cliptrace.hittexture = trace.hittexture;
 170                                 }
 171                                 cliptrace.startsupercontents |= trace.startsupercontents;
 172                         }
 173                 }
 174         }
 175         cliptrace.fraction = bound(0, cliptrace.fraction, 1);
 176         cliptrace.realfraction = bound(0, cliptrace.realfraction, 1);
 177         VectorLerp(start, cliptrace.fraction, end, cliptrace.endpos);
 178         return cliptrace;
 179 }
 180
 181 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)
 182 {
 183         float maxfrac, maxrealfrac;
 184         int n, entsnum;
 185         entity_t *entlist;
 186         unsigned char *entactivelist;
 187         entity_render_t *ent;
 188         float tracemins[3], tracemaxs[3];
 189         trace_t trace;
 190         float tempnormal[3], starttransformed[3], endtransformed[3];
 191
 192         memset (&trace, 0 , sizeof(trace_t));
 193         trace.fraction = 1;
 194         trace.realfraction = 1;
 195         VectorCopy (end, trace.endpos);
 196
 197         if (hitent)
 198                 *hitent = 0;
 199         if (cl.worldmodel && cl.worldmodel->TraceBox)
 200                 cl.worldmodel->TraceBox(cl.worldmodel, 0, &trace, start, vec3_origin, vec3_origin, end, SUPERCONTENTS_SOLID);
 201
 202         if (normal)
 203                 VectorCopy(trace.plane.normal, normal);
 204         maxfrac = trace.fraction;
 205         maxrealfrac = trace.realfraction;
 206
 207         tracemins[0] = min(start[0], end[0]);
 208         tracemaxs[0] = max(start[0], end[0]);
 209         tracemins[1] = min(start[1], end[1]);
 210         tracemaxs[1] = max(start[1], end[1]);
 211         tracemins[2] = min(start[2], end[2]);
 212         tracemaxs[2] = max(start[2], end[2]);
 213
 214         if(csqcents)
 215         {
 216                 entlist = cl.csqcentities;
 217                 entactivelist = cl.csqcentities_active;
 218                 entsnum = cl.num_csqcentities;
 219         }
 220         else
 221         {
 222                 entlist = cl.entities;
 223                 entactivelist = cl.entities_active;
 224                 entsnum = cl.num_entities;
 225         }
 226
 227         // look for embedded bmodels
 228         for (n = 0;n < entsnum;n++)
 229         {
 230                 if (!entactivelist[n])
 231                         continue;
 232                 ent = &entlist[n].render;
 233                 if (!BoxesOverlap(ent->mins, ent->maxs, tracemins, tracemaxs))
 234                         continue;
 235                 if (!ent->model || !ent->model->TraceBox)
 236                         continue;
 237                 if ((ent->flags & RENDER_EXTERIORMODEL) && !chase_active.integer)
 238                         continue;
 239                 // if transparent and not selectable, skip entity
 240                 if (!(entlist[n].state_current.effects & EF_SELECTABLE) && (ent->alpha < 1 || (ent->effects & (EF_ADDITIVE | EF_NODEPTHTEST))))
 241                         continue;
 242                 if (ent == ignoreent)
 243                         continue;
 244                 Matrix4x4_Transform(&ent->inversematrix, start, starttransformed);
 245                 Matrix4x4_Transform(&ent->inversematrix, end, endtransformed);
 246
 247                 //if (ent->model && ent->model->TraceBox)
 248                         ent->model->TraceBox(ent->model, ent->frameblend[0].frame, &trace, starttransformed, vec3_origin, vec3_origin, endtransformed, SUPERCONTENTS_SOLID);
 249
 250                 if (maxrealfrac > trace.realfraction)
 251                 {
 252                         if (hitent)
 253                                 *hitent = n;
 254                         maxfrac = trace.fraction;
 255                         maxrealfrac = trace.realfraction;
 256                         if (normal)
 257                         {
 258                                 VectorCopy(trace.plane.normal, tempnormal);
 259                                 Matrix4x4_Transform3x3(&ent->matrix, tempnormal, normal);
 260                         }
 261                 }
 262         }
 263         maxfrac = bound(0, maxfrac, 1);
 264         maxrealfrac = bound(0, maxrealfrac, 1);
 265         //if (maxfrac < 0 || maxfrac > 1) Con_Printf("fraction out of bounds %f %s:%d\n", maxfrac, __FILE__, __LINE__);
 266         if (impact)
 267                 VectorLerp(start, maxfrac, end, impact);
 268         return maxfrac;
 269 }
 270
 271 void CL_FindNonSolidLocation(const vec3_t in, vec3_t out, vec_t radius)
 272 {
 273         // FIXME: check multiple brush models
 274         if (cl.worldmodel && cl.worldmodel->brush.FindNonSolidLocation)
 275                 cl.worldmodel->brush.FindNonSolidLocation(cl.worldmodel, in, out, radius);
 276 }
 277
 278 int CL_PointSuperContents(const vec3_t p)
 279 {
 280         return CL_TraceBox(p, vec3_origin, vec3_origin, p, true, NULL, 0, false).startsupercontents;
 281 }
 282