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, start, 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                         }
 105                         cliptrace.startsupercontents |= trace.startsupercontents;
 106                 }
 107         }
 108         if (hitplayers)
 109         {
 110                 tracemins[0] = min(start[0], end[0]) + mins[0];
 111                 tracemaxs[0] = max(start[0], end[0]) + maxs[0];
 112                 tracemins[1] = min(start[1], end[1]) + mins[1];
 113                 tracemaxs[1] = max(start[1], end[1]) + maxs[1];
 114                 tracemins[2] = min(start[2], end[2]) + mins[2];
 115                 tracemaxs[2] = max(start[2], end[2]) + maxs[2];
 116
 117                 for (n = 1;n < cl.maxclients+1;n++)
 118                 {
 119                         if (n != cl.playerentity)
 120                         {
 121                                 ent = &cl.entities[n].render;
 122                                 // FIXME: crouch
 123                                 playermins = cl.playerstandmins;
 124                                 playermaxs = cl.playerstandmaxs;
 125                                 Matrix4x4_OriginFromMatrix(&ent->matrix, origin);
 126                                 VectorAdd(origin, playermins, entmins);
 127                                 VectorAdd(origin, playermaxs, entmaxs);
 128                                 if (!BoxesOverlap(tracemins, tracemaxs, entmins, entmaxs))
 129                                         continue;
 130
 131                                 memset (&trace, 0 , sizeof(trace_t));
 132                                 trace.fraction = 1;
 133                                 trace.realfraction = 1;
 134
 135                                 Matrix4x4_Transform(&ent->inversematrix, start, starttransformed);
 136                                 Matrix4x4_Transform(&ent->inversematrix, end, endtransformed);
 137                                 Collision_ClipTrace_Box(&trace, playermins, playermaxs, starttransformed, mins, maxs, endtransformed, hitsupercontentsmask, SUPERCONTENTS_SOLID);
 138
 139                                 // LordHavoc: take the 'best' answers from the new trace and combine with existing data
 140                                 if (trace.allsolid)
 141                                         cliptrace.allsolid = true;
 142                                 if (trace.startsolid)
 143                                 {
 144                                         cliptrace.startsolid = true;
 145                                         if (cliptrace.realfraction == 1)
 146                                                 if (hitent)
 147                                                         *hitent = n;
 148                                 }
 149                                 // don't set this except on the world, because it can easily confuse
 150                                 // monsters underwater if there's a bmodel involved in the trace
 151                                 // (inopen && inwater is how they check water visibility)
 152                                 //if (trace.inopen)
 153                                 //      cliptrace.inopen = true;
 154                                 if (trace.inwater)
 155                                         cliptrace.inwater = true;
 156                                 if (trace.realfraction < cliptrace.realfraction)
 157                                 {
 158                                         cliptrace.fraction = trace.fraction;
 159                                         cliptrace.realfraction = trace.realfraction;
 160                                         cliptrace.plane = trace.plane;
 161                                         if (hitent)
 162                                                 *hitent = n;
 163                                         Matrix4x4_Transform3x3(&ent->matrix, trace.plane.normal, cliptrace.plane.normal);
 164                                 }
 165                                 cliptrace.startsupercontents |= trace.startsupercontents;
 166                         }
 167                 }
 168         }
 169         cliptrace.fraction = bound(0, cliptrace.fraction, 1);
 170         cliptrace.realfraction = bound(0, cliptrace.realfraction, 1);
 171         VectorLerp(start, cliptrace.fraction, end, cliptrace.endpos);
 172         return cliptrace;
 173 }
 174
 175 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)
 176 {
 177         float maxfrac, maxrealfrac;
 178         int n, entsnum;
 179         entity_t *entlist;
 180         unsigned char *entactivelist;
 181         entity_render_t *ent;
 182         float tracemins[3], tracemaxs[3];
 183         trace_t trace;
 184         float tempnormal[3], starttransformed[3], endtransformed[3];
 185
 186         memset (&trace, 0 , sizeof(trace_t));
 187         trace.fraction = 1;
 188         trace.realfraction = 1;
 189         VectorCopy (end, trace.endpos);
 190
 191         if (hitent)
 192                 *hitent = 0;
 193         if (cl.worldmodel && cl.worldmodel->TraceBox)
 194                 cl.worldmodel->TraceBox(cl.worldmodel, 0, &trace, start, start, end, end, SUPERCONTENTS_SOLID);
 195
 196         if (normal)
 197                 VectorCopy(trace.plane.normal, normal);
 198         maxfrac = trace.fraction;
 199         maxrealfrac = trace.realfraction;
 200
 201         tracemins[0] = min(start[0], end[0]);
 202         tracemaxs[0] = max(start[0], end[0]);
 203         tracemins[1] = min(start[1], end[1]);
 204         tracemaxs[1] = max(start[1], end[1]);
 205         tracemins[2] = min(start[2], end[2]);
 206         tracemaxs[2] = max(start[2], end[2]);
 207
 208         if(csqcents)
 209         {
 210                 entlist = cl.csqcentities;
 211                 entactivelist = cl.csqcentities_active;
 212                 entsnum = cl.num_csqcentities;
 213         }
 214         else
 215         {
 216                 entlist = cl.entities;
 217                 entactivelist = cl.entities_active;
 218                 entsnum = cl.num_entities;
 219         }
 220
 221         // look for embedded bmodels
 222         for (n = 0;n < entsnum;n++)
 223         {
 224                 if (!entactivelist[n])
 225                         continue;
 226                 ent = &entlist[n].render;
 227                 if (!BoxesOverlap(ent->mins, ent->maxs, tracemins, tracemaxs))
 228                         continue;
 229                 if (!ent->model || !ent->model->TraceBox)
 230                         continue;
 231                 if ((ent->flags & RENDER_EXTERIORMODEL) && !chase_active.integer)
 232                         continue;
 233                 // if transparent and not selectable, skip entity
 234                 if (!(entlist[n].state_current.effects & EF_SELECTABLE) && (ent->alpha < 1 || (ent->effects & (EF_ADDITIVE | EF_NODEPTHTEST))))
 235                         continue;
 236                 if (ent == ignoreent)
 237                         continue;
 238                 Matrix4x4_Transform(&ent->inversematrix, start, starttransformed);
 239                 Matrix4x4_Transform(&ent->inversematrix, end, endtransformed);
 240
 241                 if (ent->model && ent->model->TraceBox)
 242                         ent->model->TraceBox(ent->model, ent->frameblend[0].frame, &trace, starttransformed, starttransformed, endtransformed, endtransformed, SUPERCONTENTS_SOLID);
 243
 244                 if (maxrealfrac > trace.realfraction)
 245                 {
 246                         if (hitent)
 247                                 *hitent = n;
 248                         maxfrac = trace.fraction;
 249                         maxrealfrac = trace.realfraction;
 250                         if (normal)
 251                         {
 252                                 VectorCopy(trace.plane.normal, tempnormal);
 253                                 Matrix4x4_Transform3x3(&ent->matrix, tempnormal, normal);
 254                         }
 255                 }
 256         }
 257         maxfrac = bound(0, maxfrac, 1);
 258         maxrealfrac = bound(0, maxrealfrac, 1);
 259         //if (maxfrac < 0 || maxfrac > 1) Con_Printf("fraction out of bounds %f %s:%d\n", maxfrac, __FILE__, __LINE__);
 260         if (impact)
 261                 VectorLerp(start, maxfrac, end, impact);
 262         return maxfrac;
 263 }
 264
 265 void CL_FindNonSolidLocation(const vec3_t in, vec3_t out, vec_t radius)
 266 {
 267         // FIXME: check multiple brush models
 268         if (cl.worldmodel && cl.worldmodel->brush.FindNonSolidLocation)
 269                 cl.worldmodel->brush.FindNonSolidLocation(cl.worldmodel, in, out, radius);
 270 }
 271
 272 int CL_PointQ1Contents(const vec3_t p)
 273 {
 274         return Mod_Q1BSP_NativeContentsFromSuperContents(NULL, CL_TraceBox(p, vec3_origin, vec3_origin, p, true, NULL, 0, false).startsupercontents);
 275         /*
 276         // FIXME: check multiple brush models
 277         if (cl.worldmodel && cl.worldmodel->brush.PointContentsQ1)
 278                 return cl.worldmodel->brush.PointContentsQ1(cl.worldmodel, p);
 279         return 0;
 280         */
 281 }
 282
 283 int CL_PointSuperContents(const vec3_t p)
 284 {
 285         return 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