12 vec4_t normal_and_dist;
17 typedef struct trace_s
19 // if true, the entire trace was in solid (see hitsupercontentsmask)
21 // if true, the initial point was in solid (see hitsupercontentsmask)
23 // this is set to true in world.c if startsolid was set in a trace against world
25 // this is set to true in world.c if startsolid was set in a trace against a SOLID_BSP entity, in other words this is true if the entity is stuck in a door or wall, but not if stuck in another normal entity
27 // if true, the trace passed through empty somewhere
28 // (set only by Q1BSP tracing)
30 // if true, the trace passed through water/slime/lava somewhere
31 // (set only by Q1BSP tracing)
33 // fraction of the total distance that was traveled before impact
34 // in case of impact this is actually nudged a bit off the surface
35 // (1.0 = did not hit anything)
37 // final position of the trace (simply a point between start and end)
39 // surface normal at impact (not really correct for edge collisions)
41 // entity the surface is on
42 // (not set by trace functions, only by physics)
44 // which SUPERCONTENTS bits to collide with, I.E. to consider solid
45 // (this also affects startsolid/allsolid)
46 int hitsupercontentsmask;
47 // deliberately skip surfaces matching this mask (e.g. SUPERCONTENTS_SKY allows you to bypass sky surfaces in q1bsp/q2bsp which are SUPERCONTENTS_SKY | SUPERCONTENTS_SOLID)
48 int skipsupercontentsmask;
49 // the supercontents mask at the start point
50 int startsupercontents;
51 // the supercontents of the impacted surface
53 // the q3 surfaceflags of the impacted surface
54 int hitq3surfaceflags;
55 // the texture of the impacted surface
56 const struct texture_s *hittexture;
57 // initially false, set when the start leaf is found
58 // (set only by Q1BSP tracing and entity box tracing)
60 // if startsolid, contains the minimum penetration depth found in the
61 // trace, and the normal needed to push it out of that solid
63 double startdepthnormal[3];
67 void Collision_Init(void);
68 void Collision_ClipTrace_Box(trace_t *trace, const vec3_t cmins, const vec3_t cmaxs, const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int boxsupercontents, int boxq3surfaceflags, const texture_t *boxtexture);
69 void Collision_ClipTrace_Point(trace_t *trace, const vec3_t cmins, const vec3_t cmaxs, const vec3_t start, int hitsupercontentsmask, int skipsupercontentsmask, int boxsupercontents, int boxq3surfaceflags, const texture_t *boxtexture);
71 void Collision_Cache_Reset(qboolean resetlimits);
72 void Collision_Cache_Init(mempool_t *mempool);
73 void Collision_Cache_NewFrame(void);
75 typedef struct colpointf_s
81 typedef struct colplanef_s
83 const struct texture_s *texture;
92 vec4_t normal_and_dist;
97 typedef struct colbrushf_s
102 // used to avoid tracing against the same brush more than once per sweep
104 // the content flags of this brush
106 // bounding planes (face planes) of this brush
109 // edge directions (normals) of this brush
111 colpointf_t *edgedirs;
112 // points (corners) of this brush
115 // renderable triangles representing this brush, using the points
118 // texture data for cases where an edgedir is used
119 const struct texture_s *texture;
121 // optimized collisions for common cases
122 int isaabb; // indicates this is an axis aligned box
123 int hasaabbplanes; // indicates this has precomputed planes for AABB collisions
127 typedef struct colboxbrushf_s
129 colpointf_t points[8];
130 colpointf_t edgedirs[6];
131 colplanef_t planes[6];
136 void Collision_CalcPlanesForTriangleBrushFloat(colbrushf_t *brush);
137 colbrushf_t *Collision_AllocBrushFromPermanentPolygonFloat(mempool_t *mempool, int numpoints, float *points, int supercontents, int q3surfaceflags, const texture_t *texture);
138 colbrushf_t *Collision_NewBrushFromPlanes(mempool_t *mempool, int numoriginalplanes, const colplanef_t *originalplanes, int supercontents, int q3surfaceflags, const texture_t *texture, int hasaabbplanes);
139 void Collision_TraceBrushBrushFloat(trace_t *trace, const colbrushf_t *thisbrush_start, const colbrushf_t *thisbrush_end, const colbrushf_t *thatbrush_start, const colbrushf_t *thatbrush_end);
140 void Collision_TraceBrushTriangleMeshFloat(trace_t *trace, const colbrushf_t *thisbrush_start, const colbrushf_t *thisbrush_end, int numtriangles, const int *element3i, const float *vertex3f, int stride, float *bbox6f, int supercontents, int q3surfaceflags, const texture_t *texture, const vec3_t segmentmins, const vec3_t segmentmaxs);
141 void Collision_TraceLineBrushFloat(trace_t *trace, const vec3_t linestart, const vec3_t lineend, const colbrushf_t *thatbrush_start, const colbrushf_t *thatbrush_end);
142 void Collision_TraceLineTriangleMeshFloat(trace_t *trace, const vec3_t linestart, const vec3_t lineend, int numtriangles, const int *element3i, const float *vertex3f, int stride, float *bbox6f, int supercontents, int q3surfaceflags, const texture_t *texture, const vec3_t segmentmins, const vec3_t segmentmaxs);
143 void Collision_TracePointBrushFloat(trace_t *trace, const vec3_t point, const colbrushf_t *thatbrush);
144 qboolean Collision_PointInsideBrushFloat(const vec3_t point, const colbrushf_t *brush);
146 void Collision_BrushForBox(colboxbrushf_t *boxbrush, const vec3_t mins, const vec3_t maxs, int supercontents, int q3surfaceflags, const texture_t *texture);
148 void Collision_BoundingBoxOfBrushTraceSegment(const colbrushf_t *start, const colbrushf_t *end, vec3_t mins, vec3_t maxs, float startfrac, float endfrac);
150 float Collision_ClipTrace_Line_Sphere(double *linestart, double *lineend, double *sphereorigin, double sphereradius, double *impactpoint, double *impactnormal);
151 void Collision_TraceLineTriangleFloat(trace_t *trace, const vec3_t linestart, const vec3_t lineend, const float *point0, const float *point1, const float *point2, int supercontents, int q3surfaceflags, const texture_t *texture);
152 void Collision_TraceBrushTriangleFloat(trace_t *trace, const colbrushf_t *thisbrush_start, const colbrushf_t *thisbrush_end, const float *v0, const float *v1, const float *v2, int supercontents, int q3surfaceflags, const texture_t *texture);
154 // traces a box move against a single entity
155 // mins and maxs are relative
157 // if the entire move stays in a single solid brush, trace.allsolid will be set
159 // if the starting point is in a solid, it will be allowed to move out to an
160 // open area, and trace.startsolid will be set
162 // type is one of the MOVE_ values such as MOVE_NOMONSTERS which skips box
163 // entities, only colliding with SOLID_BSP entities (doors, lifts)
165 // passedict is excluded from clipping checks
168 void Collision_ClipToGenericEntity(trace_t *trace, dp_model_t *model, const struct frameblend_s *frameblend, const struct skeleton_s *skeleton, const vec3_t bodymins, const vec3_t bodymaxs, int bodysupercontents, matrix4x4_t *matrix, matrix4x4_t *inversematrix, const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, float extend);
169 void Collision_ClipLineToGenericEntity(trace_t *trace, dp_model_t *model, const struct frameblend_s *frameblend, const struct skeleton_s *skeleton, const vec3_t bodymins, const vec3_t bodymaxs, int bodysupercontents, matrix4x4_t *matrix, matrix4x4_t *inversematrix, const vec3_t start, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, float extend, qboolean hitsurfaces);
170 void Collision_ClipPointToGenericEntity(trace_t *trace, dp_model_t *model, const struct frameblend_s *frameblend, const struct skeleton_s *skeleton, const vec3_t bodymins, const vec3_t bodymaxs, int bodysupercontents, matrix4x4_t *matrix, matrix4x4_t *inversematrix, const vec3_t start, int hitsupercontentsmask, int skipsupercontentsmask);
171 // like above but does not do a transform and does nothing if model is NULL
172 void Collision_ClipToWorld(trace_t *trace, dp_model_t *model, const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, float extend);
173 void Collision_ClipLineToWorld(trace_t *trace, dp_model_t *model, const vec3_t start, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, float extend, qboolean hitsurfaces);
174 void Collision_ClipPointToWorld(trace_t *trace, dp_model_t *model, const vec3_t start, int hitsupercontentsmask, int skipsupercontentsmask);
175 // caching surface trace for renderer (NOT THREAD SAFE)
176 void Collision_Cache_ClipLineToGenericEntitySurfaces(trace_t *trace, dp_model_t *model, matrix4x4_t *matrix, matrix4x4_t *inversematrix, const vec3_t start, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask);
177 void Collision_Cache_ClipLineToWorldSurfaces(trace_t *trace, dp_model_t *model, const vec3_t start, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask);
178 // combines data from two traces:
179 // merges contents flags, startsolid, allsolid, inwater
180 // updates fraction, endpos, plane and surface info if new fraction is shorter
181 void Collision_CombineTraces(trace_t *cliptrace, const trace_t *trace, void *touch, qboolean isbmodel);
183 // this enables rather large debugging spew!
186 // 1 = spew trace calls if something odd is happening
187 // 2 = spew trace calls always
188 // 3 = spew detailed trace flow (bsp tree recursion info)
189 #define COLLISIONPARANOID 0
191 extern cvar_t collision_impactnudge;
192 extern cvar_t collision_extendtracelinelength;
193 extern cvar_t collision_extendtraceboxlength;
194 extern cvar_t collision_extendmovelength;