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 // deliberately skip surfaces matching this mask on materialflags (e.g. MATERIALFLAGMASK_TRANSLUCENT)
50 int skipmaterialflagsmask;
51 // the supercontents mask at the start point
52 int startsupercontents;
53 // the supercontents of the impacted surface
55 // the q3 surfaceflags of the impacted surface
56 int hitq3surfaceflags;
57 // the texture of the impacted surface
58 const struct texture_s *hittexture;
59 // initially false, set when the start leaf is found
60 // (set only by Q1BSP tracing and entity box tracing)
62 // if startsolid, contains the minimum penetration depth found in the
63 // trace, and the normal needed to push it out of that solid
65 double startdepthnormal[3];
66 const struct texture_s *starttexture;
70 void Collision_Init(void);
71 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 skipmaterialflagsmask, int boxsupercontents, int boxq3surfaceflags, const texture_t *boxtexture);
72 void Collision_ClipTrace_Point(trace_t *trace, const vec3_t cmins, const vec3_t cmaxs, const vec3_t start, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, int boxsupercontents, int boxq3surfaceflags, const texture_t *boxtexture);
74 void Collision_Cache_Reset(qbool resetlimits);
75 void Collision_Cache_Init(mempool_t *mempool);
76 void Collision_Cache_NewFrame(void);
78 typedef struct colpointf_s
84 typedef struct colplanef_s
86 const struct texture_s *texture;
95 vec4_t normal_and_dist;
100 typedef struct colbrushf_s
105 // used to avoid tracing against the same brush more than once per sweep
107 // the content flags of this brush
109 // bounding planes (face planes) of this brush
112 // edge directions (normals) of this brush
114 colpointf_t *edgedirs;
115 // points (corners) of this brush
118 // renderable triangles representing this brush, using the points
121 // texture data for cases where an edgedir is used
122 const struct texture_s *texture;
124 // optimized collisions for common cases
125 int isaabb; // indicates this is an axis aligned box
126 int hasaabbplanes; // indicates this has precomputed planes for AABB collisions
130 typedef struct colboxbrushf_s
132 colpointf_t points[8];
133 colpointf_t edgedirs[6];
134 colplanef_t planes[6];
139 void Collision_CalcPlanesForTriangleBrushFloat(colbrushf_t *brush);
140 colbrushf_t *Collision_NewBrushFromPlanes(mempool_t *mempool, int numoriginalplanes, const colplanef_t *originalplanes, int supercontents, int q3surfaceflags, const texture_t *texture, int hasaabbplanes);
141 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);
142 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);
143 void Collision_TraceLineBrushFloat(trace_t *trace, const vec3_t linestart, const vec3_t lineend, const colbrushf_t *thatbrush_start, const colbrushf_t *thatbrush_end);
144 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);
145 void Collision_TracePointBrushFloat(trace_t *trace, const vec3_t point, const colbrushf_t *thatbrush);
146 qbool Collision_PointInsideBrushFloat(const vec3_t point, const colbrushf_t *brush);
148 void Collision_BrushForBox(colboxbrushf_t *boxbrush, const vec3_t mins, const vec3_t maxs, int supercontents, int q3surfaceflags, const texture_t *texture);
150 void Collision_BoundingBoxOfBrushTraceSegment(const colbrushf_t *start, const colbrushf_t *end, vec3_t mins, vec3_t maxs, float startfrac, float endfrac);
152 float Collision_ClipTrace_Line_Sphere(double *linestart, double *lineend, double *sphereorigin, double sphereradius, double *impactpoint, double *impactnormal);
153 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);
154 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);
156 // traces a box move against a single entity
157 // mins and maxs are relative
159 // if the entire move stays in a single solid brush, trace.allsolid will be set
161 // if the starting point is in a solid, it will be allowed to move out to an
162 // open area, and trace.startsolid will be set
164 // type is one of the MOVE_ values such as MOVE_NOMONSTERS which skips box
165 // entities, only colliding with SOLID_BSP entities (doors, lifts)
167 // passedict is excluded from clipping checks
170 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, int skipmaterialflagsmask, float extend);
171 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, int skipmaterialflagsmask, float extend, qbool hitsurfaces);
172 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, int skipmaterialflagsmask);
173 // like above but does not do a transform and does nothing if model is NULL
174 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, int skipmaterialflagsmask, float extend);
175 void Collision_ClipLineToWorld(trace_t *trace, dp_model_t *model, const vec3_t start, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, float extend, qbool hitsurfaces);
176 void Collision_ClipPointToWorld(trace_t *trace, dp_model_t *model, const vec3_t start, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask);
177 // caching surface trace for renderer (NOT THREAD SAFE)
178 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, int skipmaterialflagsmask);
179 void Collision_Cache_ClipLineToWorldSurfaces(trace_t *trace, dp_model_t *model, const vec3_t start, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask);
180 // combines data from two traces:
181 // merges contents flags, startsolid, allsolid, inwater
182 // updates fraction, endpos, plane and surface info if new fraction is shorter
183 void Collision_CombineTraces(trace_t *cliptrace, const trace_t *trace, void *touch, qbool isbmodel);
185 // this enables rather large debugging spew!
188 // 1 = spew trace calls if something odd is happening
189 // 2 = spew trace calls always
190 // 3 = spew detailed trace flow (bsp tree recursion info)
191 #define COLLISIONPARANOID 0
193 extern cvar_t collision_impactnudge;
194 extern cvar_t collision_extendtracelinelength;
195 extern cvar_t collision_extendtraceboxlength;
196 extern cvar_t collision_extendmovelength;
197 extern cvar_t collision_bih_fullrecursion;