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         float tempnormal[3], starttransformed[3], endtransformed[3];
  42
  43         memset (&trace, 0 , sizeof(trace_t));
  44         trace.fraction = 1;
  45         trace.realfraction = 1;
  46         VectorCopy (end, trace.endpos);
  47
  48         if (hitent)
  49                 *hitent = &cl_entities[0].render;
  50         Mod_CheckLoaded(cl.worldmodel);
  51         if (cl.worldmodel && cl.worldmodel->TraceBox)
  52                 cl.worldmodel->TraceBox(cl.worldmodel, 0, &trace, start, start, end, end, hitsupercontentsmask);
  53
  54         if (normal)
  55                 VectorCopy(trace.plane.normal, normal);
  56         cl_traceline_startsupercontents = trace.startsupercontents;
  57         maxfrac = trace.fraction;
  58         maxrealfrac = trace.realfraction;
  59
  60         if (hitbmodels && cl_num_brushmodel_entities)
  61         {
  62                 tracemins[0] = min(start[0], end[0]);
  63                 tracemaxs[0] = max(start[0], end[0]);
  64                 tracemins[1] = min(start[1], end[1]);
  65                 tracemaxs[1] = max(start[1], end[1]);
  66                 tracemins[2] = min(start[2], end[2]);
  67                 tracemaxs[2] = max(start[2], end[2]);
  68
  69                 // look for embedded bmodels
  70                 for (n = 0;n < cl_num_brushmodel_entities;n++)
  71                 {
  72                         ent = cl_brushmodel_entities[n];
  73                         if (ent->mins[0] > tracemaxs[0] || ent->maxs[0] < tracemins[0]
  74                          || ent->mins[1] > tracemaxs[1] || ent->maxs[1] < tracemins[1]
  75                          || ent->mins[2] > tracemaxs[2] || ent->maxs[2] < tracemins[2])
  76                                 continue;
  77
  78                         Matrix4x4_Transform(&ent->inversematrix, start, starttransformed);
  79                         Matrix4x4_Transform(&ent->inversematrix, end, endtransformed);
  80
  81                         if (ent->model && ent->model->TraceBox)
  82                                 ent->model->TraceBox(ent->model, 0, &trace, starttransformed, starttransformed, endtransformed, endtransformed, hitsupercontentsmask);
  83
  84                         cl_traceline_startsupercontents |= trace.startsupercontents;
  85                         if (maxrealfrac > trace.realfraction)
  86                         {
  87                                 if (hitent)
  88                                         *hitent = ent;
  89                                 maxfrac = trace.fraction;
  90                                 maxrealfrac = trace.realfraction;
  91                                 if (normal)
  92                                 {
  93                                         VectorCopy(trace.plane.normal, tempnormal);
  94                                         Matrix4x4_Transform3x3(&ent->matrix, tempnormal, normal);
  95                                 }
  96                         }
  97                 }
  98         }
  99         if (maxfrac < 0 || maxfrac > 1) Con_Printf("fraction out of bounds %f %s:%d\n", maxfrac, __FILE__, __LINE__);
 100         if (impact)
 101                 VectorLerp(start, maxfrac, end, impact);
 102         return maxfrac;
 103 }
 104
 105 float CL_SelectTraceLine(const vec3_t start, const vec3_t end, vec3_t impact, vec3_t normal, int *hitent)
 106 {
 107         float maxfrac, maxrealfrac;
 108         int n;
 109         entity_render_t *ent;
 110         float tracemins[3], tracemaxs[3];
 111         trace_t trace;
 112         float tempnormal[3], starttransformed[3], endtransformed[3];
 113
 114         memset (&trace, 0 , sizeof(trace_t));
 115         trace.fraction = 1;
 116         trace.realfraction = 1;
 117         VectorCopy (end, trace.endpos);
 118
 119         if (hitent)
 120                 *hitent = 0;
 121         Mod_CheckLoaded(cl.worldmodel);
 122         if (cl.worldmodel && cl.worldmodel->TraceBox)
 123                 cl.worldmodel->TraceBox(cl.worldmodel, 0, &trace, start, start, end, end, SUPERCONTENTS_SOLID);
 124
 125         if (normal)
 126                 VectorCopy(trace.plane.normal, normal);
 127         cl_traceline_startsupercontents = trace.startsupercontents;
 128         maxfrac = trace.fraction;
 129         maxrealfrac = trace.realfraction;
 130
 131         tracemins[0] = min(start[0], end[0]);
 132         tracemaxs[0] = max(start[0], end[0]);
 133         tracemins[1] = min(start[1], end[1]);
 134         tracemaxs[1] = max(start[1], end[1]);
 135         tracemins[2] = min(start[2], end[2]);
 136         tracemaxs[2] = max(start[2], end[2]);
 137
 138         // look for embedded bmodels
 139         for (n = 0;n < MAX_EDICTS;n++)
 140         {
 141                 if (!cl_entities_active[n])
 142                         continue;
 143                 ent = &cl_entities[n].render;
 144                 if (!BoxesOverlap(ent->mins, ent->maxs, tracemins, tracemaxs))
 145                         continue;
 146                 if (!ent->model || !ent->model->TraceBox)
 147                         continue;
 148                 // if transparent and not selectable, skip entity
 149                 if (!(cl_entities[n].state_current.effects & EF_SELECTABLE) && (ent->alpha < 1 || (ent->effects & (EF_ADDITIVE | EF_NODEPTHTEST))))
 150                         continue;
 151                 Matrix4x4_Transform(&ent->inversematrix, start, starttransformed);
 152                 Matrix4x4_Transform(&ent->inversematrix, end, endtransformed);
 153
 154                 if (ent->model && ent->model->TraceBox)
 155                         ent->model->TraceBox(ent->model, ent->frameblend[0].frame, &trace, starttransformed, starttransformed, endtransformed, endtransformed, SUPERCONTENTS_SOLID);
 156
 157                 cl_traceline_startsupercontents |= trace.startsupercontents;
 158                 if (maxrealfrac > trace.realfraction)
 159                 {
 160                         if (hitent)
 161                                 *hitent = n;
 162                         maxfrac = trace.fraction;
 163                         maxrealfrac = trace.realfraction;
 164                         if (normal)
 165                         {
 166                                 VectorCopy(trace.plane.normal, tempnormal);
 167                                 Matrix4x4_Transform3x3(&ent->matrix, tempnormal, normal);
 168                         }
 169                 }
 170         }
 171         if (maxfrac < 0 || maxfrac > 1) Con_Printf("fraction out of bounds %f %s:%d\n", maxfrac, __FILE__, __LINE__);
 172         if (impact)
 173                 VectorLerp(start, maxfrac, end, impact);
 174         return maxfrac;
 175 }
 176
 177 void CL_FindNonSolidLocation(const vec3_t in, vec3_t out, vec_t radius)
 178 {
 179         // FIXME: check multiple brush models
 180         if (cl.worldmodel && cl.worldmodel->brush.FindNonSolidLocation)
 181                 cl.worldmodel->brush.FindNonSolidLocation(cl.worldmodel, in, out, radius);
 182 }
 183
 184 int CL_PointQ1Contents(const vec3_t p)
 185 {
 186         CL_TraceLine(p, p, NULL, NULL, true, NULL, 0);
 187         return Mod_Q1BSP_NativeContentsFromSuperContents(NULL, cl_traceline_startsupercontents);
 188         /*
 189         // FIXME: check multiple brush models
 190         if (cl.worldmodel && cl.worldmodel->brush.PointContentsQ1)
 191                 return cl.worldmodel->brush.PointContentsQ1(cl.worldmodel, p);
 192         return 0;
 193         */
 194 }
 195
 196 int CL_PointSuperContents(const vec3_t p)
 197 {
 198         CL_TraceLine(p, p, NULL, NULL, true, NULL, 0);
 199         return cl_traceline_startsupercontents;
 200         /*
 201         // FIXME: check multiple brush models
 202         if (cl.worldmodel && cl.worldmodel->brush.PointContentsQ1)
 203                 return cl.worldmodel->brush.PointContentsQ1(cl.worldmodel, p);
 204         return 0;
 205         */
 206 }
 207