13 typedef struct trace_s
15 // if true, the entire trace was in solid (see hitsupercontentsmask)
17 // if true, the initial point was in solid (see hitsupercontentsmask)
19 // 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
21 // if true, the trace passed through empty somewhere
22 // (set only by Q1BSP tracing)
24 // if true, the trace passed through water/slime/lava somewhere
25 // (set only by Q1BSP tracing)
27 // fraction of the total distance that was traveled before impact
28 // (1.0 = did not hit anything)
30 // like fraction but is not nudged away from the surface (better for
31 // comparisons between two trace structs, as only one nudge for the final
32 // result is ever needed)
34 // final position of the trace (simply a point between start and end)
36 // surface normal at impact (not really correct for edge collisions)
38 // entity the surface is on
39 // (not set by trace functions, only by physics)
41 // which SUPERCONTENTS bits to collide with, I.E. to consider solid
42 // (this also affects startsolid/allsolid)
43 int hitsupercontentsmask;
44 // the supercontents mask at the start point
45 int startsupercontents;
46 // the supercontents of the impacted surface
48 // the q3 surfaceflags of the impacted surface
49 int hitq3surfaceflags;
50 // the texture of the impacted surface
51 const struct texture_s *hittexture;
52 // initially false, set when the start leaf is found
53 // (set only by Q1BSP tracing and entity box tracing)
55 // if startsolid, contains the minimum penetration depth found in the
56 // trace, and the normal needed to push it out of that solid
58 double startdepthnormal[3];
62 void Collision_Init(void);
63 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 boxsupercontents, int boxq3surfaceflags, const texture_t *boxtexture);
64 void Collision_ClipTrace_Point(trace_t *trace, const vec3_t cmins, const vec3_t cmaxs, const vec3_t start, int hitsupercontentsmask, int boxsupercontents, int boxq3surfaceflags, const texture_t *boxtexture);
66 void Collision_Cache_Reset(qboolean resetlimits);
67 void Collision_Cache_Init(mempool_t *mempool);
68 void Collision_Cache_NewFrame(void);
70 typedef struct colpointf_s
76 typedef struct colplanef_s
78 const struct texture_s *texture;
85 typedef struct colbrushf_s
90 // used to avoid tracing against the same brush more than once per sweep
92 // the content flags of this brush
94 // bounding planes (face planes) of this brush
97 // edge directions (normals) of this brush
99 colpointf_t *edgedirs;
100 // points (corners) of this brush
103 // renderable triangles representing this brush, using the points
106 // texture data for cases where an edgedir is used
107 const struct texture_s *texture;
109 // optimized collisions for common cases
110 int isaabb; // indicates this is an axis aligned box
111 int hasaabbplanes; // indicates this has precomputed planes for AABB collisions
115 typedef struct colboxbrushf_s
117 colpointf_t points[8];
118 colpointf_t edgedirs[6];
119 colplanef_t planes[6];
124 void Collision_CalcPlanesForPolygonBrushFloat(colbrushf_t *brush);
125 colbrushf_t *Collision_AllocBrushFromPermanentPolygonFloat(mempool_t *mempool, int numpoints, float *points, int supercontents, int q3surfaceflags, const texture_t *texture);
126 colbrushf_t *Collision_NewBrushFromPlanes(mempool_t *mempool, int numoriginalplanes, const colplanef_t *originalplanes, int supercontents, int q3surfaceflags, const texture_t *texture, int hasaabbplanes);
127 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);
128 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);
129 void Collision_TraceLineBrushFloat(trace_t *trace, const vec3_t linestart, const vec3_t lineend, const colbrushf_t *thatbrush_start, const colbrushf_t *thatbrush_end);
130 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);
131 void Collision_TracePointBrushFloat(trace_t *trace, const vec3_t point, const colbrushf_t *thatbrush);
132 qboolean Collision_PointInsideBrushFloat(const vec3_t point, const colbrushf_t *brush);
134 void Collision_BrushForBox(colboxbrushf_t *boxbrush, const vec3_t mins, const vec3_t maxs, int supercontents, int q3surfaceflags, const texture_t *texture);
136 void Collision_BoundingBoxOfBrushTraceSegment(const colbrushf_t *start, const colbrushf_t *end, vec3_t mins, vec3_t maxs, float startfrac, float endfrac);
138 float Collision_ClipTrace_Line_Sphere(double *linestart, double *lineend, double *sphereorigin, double sphereradius, double *impactpoint, double *impactnormal);
139 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);
140 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);
142 // traces a box move against a single entity
143 // mins and maxs are relative
145 // if the entire move stays in a single solid brush, trace.allsolid will be set
147 // if the starting point is in a solid, it will be allowed to move out to an
148 // open area, and trace.startsolid will be set
150 // type is one of the MOVE_ values such as MOVE_NOMONSTERS which skips box
151 // entities, only colliding with SOLID_BSP entities (doors, lifts)
153 // passedict is excluded from clipping checks
156 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);
157 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, qboolean hitsurfaces);
158 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);
159 // like above but does not do a transform and does nothing if model is NULL
160 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 hitsupercontents);
161 void Collision_ClipLineToWorld(trace_t *trace, dp_model_t *model, const vec3_t start, const vec3_t end, int hitsupercontents, qboolean hitsurfaces);
162 void Collision_ClipPointToWorld(trace_t *trace, dp_model_t *model, const vec3_t start, int hitsupercontents);
163 // combines data from two traces:
164 // merges contents flags, startsolid, allsolid, inwater
165 // updates fraction, endpos, plane and surface info if new fraction is shorter
166 void Collision_CombineTraces(trace_t *cliptrace, const trace_t *trace, void *touch, qboolean isbmodel);
168 // shorten a trace by the given factor
169 void Collision_ShortenTrace(trace_t *trace, float shorten_factor, const vec3_t end);
171 // this enables rather large debugging spew!
174 // 1 = spew trace calls if something odd is happening
175 // 2 = spew trace calls always
176 // 3 = spew detailed trace flow (bsp tree recursion info)
177 #define COLLISIONPARANOID 0
179 // make every trace <collision_endposnudge>qu longer, and shorten the result, to work around a stupid bug somewhere
180 #define COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
181 #ifdef COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
182 extern cvar_t collision_endposnudge;