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 starttransformed, endtransformed, starttransformedmins, endtransformedmins, starttransformedmaxs, endtransformedmaxs;
  39         vec3_t startmins, startmaxs, endmins, endmaxs, entmins, entmaxs;
  40         vec_t *playermins, *playermaxs;
  41
  42         VectorAdd(start, mins, startmins);
  43         VectorAdd(start, maxs, startmaxs);
  44         VectorAdd(end, mins, endmins);
  45         VectorAdd(end, maxs, endmaxs);
  46
  47         memset (&cliptrace, 0 , sizeof(trace_t));
  48         cliptrace.fraction = 1;
  49         cliptrace.realfraction = 1;
  50
  51         if (cl.worldmodel && cl.worldmodel->TraceBox)
  52                 cl.worldmodel->TraceBox(cl.worldmodel, 0, &cliptrace, startmins, startmaxs, endmins, endmaxs, hitsupercontentsmask);
  53
  54         if (hitent)
  55                 *hitent = 0;
  56
  57         if (hitbmodels && cl_num_brushmodel_entities)
  58         {
  59                 tracemins[0] = min(start[0], end[0]) + mins[0];
  60                 tracemaxs[0] = max(start[0], end[0]) + maxs[0];
  61                 tracemins[1] = min(start[1], end[1]) + mins[1];
  62                 tracemaxs[1] = max(start[1], end[1]) + maxs[1];
  63                 tracemins[2] = min(start[2], end[2]) + mins[2];
  64                 tracemaxs[2] = max(start[2], end[2]) + maxs[2];
  65
  66                 // look for embedded bmodels
  67                 for (n = 0;n < cl_num_brushmodel_entities;n++)
  68                 {
  69                         ent = &cl_entities[cl_brushmodel_entities[n]].render;
  70                         if (!BoxesOverlap(tracemins, tracemaxs, ent->mins, ent->maxs))
  71                                 continue;
  72
  73                         Matrix4x4_Transform(&ent->inversematrix, start, starttransformed);
  74                         Matrix4x4_Transform(&ent->inversematrix, end, endtransformed);
  75                         VectorAdd(starttransformed, mins, starttransformedmins);
  76                         VectorAdd(starttransformed, maxs, starttransformedmaxs);
  77                         VectorAdd(endtransformed, mins, endtransformedmins);
  78                         VectorAdd(endtransformed, maxs, endtransformedmaxs);
  79
  80                         memset (&trace, 0 , sizeof(trace_t));
  81                         trace.fraction = 1;
  82                         trace.realfraction = 1;
  83
  84                         if (ent->model && ent->model->TraceBox)
  85                                 ent->model->TraceBox(ent->model, 0, &trace, starttransformedmins, starttransformedmaxs, endtransformedmins, endtransformedmaxs, hitsupercontentsmask);
  86
  87                         // LordHavoc: take the 'best' answers from the new trace and combine with existing data
  88                         if (trace.allsolid)
  89                                 cliptrace.allsolid = true;
  90                         if (trace.startsolid)
  91                         {
  92                                 cliptrace.startsolid = true;
  93                                 if (cliptrace.realfraction == 1)
  94                                         if (hitent)
  95                                                 *hitent = cl_brushmodel_entities[n];
  96                         }
  97                         // don't set this except on the world, because it can easily confuse
  98                         // monsters underwater if there's a bmodel involved in the trace
  99                         // (inopen && inwater is how they check water visibility)
 100                         //if (trace.inopen)
 101                         //      cliptrace.inopen = true;
 102                         if (trace.inwater)
 103                                 cliptrace.inwater = true;
 104                         if (trace.realfraction < cliptrace.realfraction)
 105                         {
 106                                 cliptrace.fraction = trace.fraction;
 107                                 cliptrace.realfraction = trace.realfraction;
 108                                 cliptrace.plane = trace.plane;
 109                                 if (hitent)
 110                                         *hitent = cl_brushmodel_entities[n];
 111                                 Matrix4x4_Transform3x3(&ent->matrix, trace.plane.normal, cliptrace.plane.normal);
 112                         }
 113                         cliptrace.startsupercontents |= trace.startsupercontents;
 114                 }
 115         }
 116         if (hitplayers)
 117         {
 118                 tracemins[0] = min(start[0], end[0]) + mins[0];
 119                 tracemaxs[0] = max(start[0], end[0]) + maxs[0];
 120                 tracemins[1] = min(start[1], end[1]) + mins[1];
 121                 tracemaxs[1] = max(start[1], end[1]) + maxs[1];
 122                 tracemins[2] = min(start[2], end[2]) + mins[2];
 123                 tracemaxs[2] = max(start[2], end[2]) + maxs[2];
 124
 125                 for (n = 1;n < cl.maxclients+1;n++)
 126                 {
 127                         if (n != cl.playerentity)
 128                         {
 129                                 ent = &cl_entities[n].render;
 130                                 // FIXME: crouch
 131                                 playermins = cl_playerstandmins;
 132                                 playermaxs = cl_playerstandmaxs;
 133                                 VectorAdd(ent->origin, playermins, entmins);
 134                                 VectorAdd(ent->origin, playermaxs, entmaxs);
 135                                 if (!BoxesOverlap(tracemins, tracemaxs, entmins, entmaxs))
 136                                         continue;
 137
 138                                 memset (&trace, 0 , sizeof(trace_t));
 139                                 trace.fraction = 1;
 140                                 trace.realfraction = 1;
 141
 142                                 Matrix4x4_Transform(&ent->inversematrix, start, starttransformed);
 143                                 Matrix4x4_Transform(&ent->inversematrix, end, endtransformed);
 144                                 Collision_ClipTrace_Box(&trace, playermins, playermaxs, starttransformed, mins, maxs, endtransformed, hitsupercontentsmask, SUPERCONTENTS_SOLID);
 145
 146                                 // LordHavoc: take the 'best' answers from the new trace and combine with existing data
 147                                 if (trace.allsolid)
 148                                         cliptrace.allsolid = true;
 149                                 if (trace.startsolid)
 150                                 {
 151                                         cliptrace.startsolid = true;
 152                                         if (cliptrace.realfraction == 1)
 153                                                 if (hitent)
 154                                                         *hitent = n;
 155                                 }
 156                                 // don't set this except on the world, because it can easily confuse
 157                                 // monsters underwater if there's a bmodel involved in the trace
 158                                 // (inopen && inwater is how they check water visibility)
 159                                 //if (trace.inopen)
 160                                 //      cliptrace.inopen = true;
 161                                 if (trace.inwater)
 162                                         cliptrace.inwater = true;
 163                                 if (trace.realfraction < cliptrace.realfraction)
 164                                 {
 165                                         cliptrace.fraction = trace.fraction;
 166                                         cliptrace.realfraction = trace.realfraction;
 167                                         cliptrace.plane = trace.plane;
 168                                         if (hitent)
 169                                                 *hitent = n;
 170                                         Matrix4x4_Transform3x3(&ent->matrix, trace.plane.normal, cliptrace.plane.normal);
 171                                 }
 172                                 cliptrace.startsupercontents |= trace.startsupercontents;
 173                         }
 174                 }
 175         }
 176         cliptrace.fraction = bound(0, cliptrace.fraction, 1);
 177         cliptrace.realfraction = bound(0, cliptrace.realfraction, 1);
 178         VectorLerp(start, cliptrace.fraction, end, cliptrace.endpos);
 179         return cliptrace;
 180 }
 181
 182 float CL_SelectTraceLine(const vec3_t start, const vec3_t end, vec3_t impact, vec3_t normal, int *hitent, entity_render_t *ignoreent)
 183 {
 184         float maxfrac, maxrealfrac;
 185         int n;
 186         entity_render_t *ent;
 187         float tracemins[3], tracemaxs[3];
 188         trace_t trace;
 189         float tempnormal[3], starttransformed[3], endtransformed[3];
 190
 191         memset (&trace, 0 , sizeof(trace_t));
 192         trace.fraction = 1;
 193         trace.realfraction = 1;
 194         VectorCopy (end, trace.endpos);
 195
 196         if (hitent)
 197                 *hitent = 0;
 198         if (cl.worldmodel && cl.worldmodel->TraceBox)
 199                 cl.worldmodel->TraceBox(cl.worldmodel, 0, &trace, start, start, end, end, SUPERCONTENTS_SOLID);
 200
 201         if (normal)
 202                 VectorCopy(trace.plane.normal, normal);
 203         //cl_traceline_startsupercontents = trace.startsupercontents;
 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         // look for embedded bmodels
 215         for (n = 0;n < cl_num_entities;n++)
 216         {
 217                 if (!cl_entities_active[n])
 218                         continue;
 219                 ent = &cl_entities[n].render;
 220                 if (!BoxesOverlap(ent->mins, ent->maxs, tracemins, tracemaxs))
 221                         continue;
 222                 if (!ent->model || !ent->model->TraceBox)
 223                         continue;
 224                 if ((ent->flags & RENDER_EXTERIORMODEL) && !chase_active.integer)
 225                         continue;
 226                 // if transparent and not selectable, skip entity
 227                 if (!(cl_entities[n].state_current.effects & EF_SELECTABLE) && (ent->alpha < 1 || (ent->effects & (EF_ADDITIVE | EF_NODEPTHTEST))))
 228                         continue;
 229                 if (ent == ignoreent)
 230                         continue;
 231                 Matrix4x4_Transform(&ent->inversematrix, start, starttransformed);
 232                 Matrix4x4_Transform(&ent->inversematrix, end, endtransformed);
 233
 234                 if (ent->model && ent->model->TraceBox)
 235                         ent->model->TraceBox(ent->model, ent->frameblend[0].frame, &trace, starttransformed, starttransformed, endtransformed, endtransformed, SUPERCONTENTS_SOLID);
 236
 237                 //cl_traceline_startsupercontents |= trace.startsupercontents;
 238                 if (maxrealfrac > trace.realfraction)
 239                 {
 240                         if (hitent)
 241                                 *hitent = n;
 242                         maxfrac = trace.fraction;
 243                         maxrealfrac = trace.realfraction;
 244                         if (normal)
 245                         {
 246                                 VectorCopy(trace.plane.normal, tempnormal);
 247                                 Matrix4x4_Transform3x3(&ent->matrix, tempnormal, normal);
 248                         }
 249                 }
 250         }
 251         maxfrac = bound(0, maxfrac, 1);
 252         maxrealfrac = bound(0, maxrealfrac, 1);
 253         //if (maxfrac < 0 || maxfrac > 1) Con_Printf("fraction out of bounds %f %s:%d\n", maxfrac, __FILE__, __LINE__);
 254         if (impact)
 255                 VectorLerp(start, maxfrac, end, impact);
 256         return maxfrac;
 257 }
 258
 259 void CL_FindNonSolidLocation(const vec3_t in, vec3_t out, vec_t radius)
 260 {
 261         // FIXME: check multiple brush models
 262         if (cl.worldmodel && cl.worldmodel->brush.FindNonSolidLocation)
 263                 cl.worldmodel->brush.FindNonSolidLocation(cl.worldmodel, in, out, radius);
 264 }
 265
 266 int CL_PointQ1Contents(const vec3_t p)
 267 {
 268         return Mod_Q1BSP_NativeContentsFromSuperContents(NULL, CL_TraceBox(p, vec3_origin, vec3_origin, p, true, NULL, 0, false).startsupercontents);
 269         /*
 270         // FIXME: check multiple brush models
 271         if (cl.worldmodel && cl.worldmodel->brush.PointContentsQ1)
 272                 return cl.worldmodel->brush.PointContentsQ1(cl.worldmodel, p);
 273         return 0;
 274         */
 275 }
 276
 277 int CL_PointSuperContents(const vec3_t p)
 278 {
 279         return CL_TraceBox(p, vec3_origin, vec3_origin, p, true, NULL, 0, false).startsupercontents;
 280         /*
 281         // FIXME: check multiple brush models
 282         if (cl.worldmodel && cl.worldmodel->brush.PointContentsQ1)
 283                 return cl.worldmodel->brush.PointContentsQ1(cl.worldmodel, p);
 284         return 0;
 285         */
 286 }
 287