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 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 int cl_traceline_startsupercontents;
  33
  34 float CL_TraceLine(const vec3_t start, const vec3_t end, vec3_t impact, vec3_t normal, int hitbmodels, entity_render_t **hitent, int hitsupercontentsmask)
  35 {
  36         float maxfrac, maxrealfrac;
  37         int n;
  38         entity_render_t *ent;
  39         float tracemins[3], tracemaxs[3];
  40         trace_t trace;
  41         matrix4x4_t matrix, imatrix;
  42         float tempnormal[3], starttransformed[3], endtransformed[3];
  43
  44         memset (&trace, 0 , sizeof(trace_t));
  45         trace.fraction = 1;
  46         trace.realfraction = 1;
  47         VectorCopy (end, trace.endpos);
  48
  49         if (hitent)
  50                 *hitent = &cl_entities[0].render;
  51         Mod_CheckLoaded(cl.worldmodel);
  52         if (cl.worldmodel && cl.worldmodel->TraceBox)
  53                 cl.worldmodel->TraceBox(cl.worldmodel, 0, &trace, start, start, end, end, hitsupercontentsmask);
  54
  55         if (normal)
  56                 VectorCopy(trace.plane.normal, normal);
  57         cl_traceline_startsupercontents = trace.startsupercontents;
  58         maxfrac = trace.fraction;
  59         maxrealfrac = trace.realfraction;
  60
  61         if (hitbmodels && cl_num_brushmodel_entities)
  62         {
  63                 tracemins[0] = min(start[0], end[0]);
  64                 tracemaxs[0] = max(start[0], end[0]);
  65                 tracemins[1] = min(start[1], end[1]);
  66                 tracemaxs[1] = max(start[1], end[1]);
  67                 tracemins[2] = min(start[2], end[2]);
  68                 tracemaxs[2] = max(start[2], end[2]);
  69
  70                 // look for embedded bmodels
  71                 for (n = 0;n < cl_num_brushmodel_entities;n++)
  72                 {
  73                         ent = cl_brushmodel_entities[n];
  74                         if (ent->mins[0] > tracemaxs[0] || ent->maxs[0] < tracemins[0]
  75                          || ent->mins[1] > tracemaxs[1] || ent->maxs[1] < tracemins[1]
  76                          || ent->mins[2] > tracemaxs[2] || ent->maxs[2] < tracemins[2])
  77                                 continue;
  78
  79                         Matrix4x4_CreateFromQuakeEntity(&matrix, ent->origin[0], ent->origin[1], ent->origin[2], ent->angles[0], ent->angles[1], ent->angles[2], 1);
  80                         Matrix4x4_Invert_Simple(&imatrix, &matrix);
  81                         Matrix4x4_Transform(&imatrix, start, starttransformed);
  82                         Matrix4x4_Transform(&imatrix, end, endtransformed);
  83
  84                         if (ent->model && ent->model->TraceBox)
  85                                 ent->model->TraceBox(ent->model, 0, &trace, starttransformed, starttransformed, endtransformed, endtransformed, hitsupercontentsmask);
  86
  87                         cl_traceline_startsupercontents |= trace.startsupercontents;
  88                         if (maxrealfrac > trace.realfraction)
  89                         {
  90                                 if (hitent)
  91                                         *hitent = ent;
  92                                 maxfrac = trace.fraction;
  93                                 maxrealfrac = trace.realfraction;
  94                                 if (normal)
  95                                 {
  96                                         VectorCopy(trace.plane.normal, tempnormal);
  97                                         Matrix4x4_Transform3x3(&matrix, tempnormal, normal);
  98                                 }
  99                         }
 100                 }
 101         }
 102         if (maxfrac < 0 || maxfrac > 1) Con_Printf("fraction out of bounds %f %s:%d\n", maxfrac, __FILE__, __LINE__);
 103         if (impact)
 104                 VectorLerp(start, maxfrac, end, impact);
 105         return maxfrac;
 106 }
 107
 108 void CL_FindNonSolidLocation(const vec3_t in, vec3_t out, vec_t radius)
 109 {
 110         // FIXME: check multiple brush models
 111         if (cl.worldmodel && cl.worldmodel->brush.FindNonSolidLocation)
 112                 cl.worldmodel->brush.FindNonSolidLocation(cl.worldmodel, in, out, radius);
 113 }
 114
 115 int CL_PointQ1Contents(const vec3_t p)
 116 {
 117         CL_TraceLine(p, p, NULL, NULL, true, NULL, 0);
 118         return Mod_Q1BSP_NativeContentsFromSuperContents(NULL, cl_traceline_startsupercontents);
 119         /*
 120         // FIXME: check multiple brush models
 121         if (cl.worldmodel && cl.worldmodel->brush.PointContentsQ1)
 122                 return cl.worldmodel->brush.PointContentsQ1(cl.worldmodel, p);
 123         return 0;
 124         */
 125 }
 126
 127 int CL_PointSuperContents(const vec3_t p)
 128 {
 129         CL_TraceLine(p, p, NULL, NULL, true, NULL, 0);
 130         return cl_traceline_startsupercontents;
 131         /*
 132         // FIXME: check multiple brush models
 133         if (cl.worldmodel && cl.worldmodel->brush.PointContentsQ1)
 134                 return cl.worldmodel->brush.PointContentsQ1(cl.worldmodel, p);
 135         return 0;
 136         */
 137 }
 138