+float Collision_ClipTrace_Line_Sphere(double *linestart, double *lineend, double *sphereorigin, double sphereradius, double *impactpoint, double *impactnormal);
+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);
+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);
+
+// traces a box move against a single entity
+// mins and maxs are relative
+//
+// if the entire move stays in a single solid brush, trace.allsolid will be set
+//
+// if the starting point is in a solid, it will be allowed to move out to an
+// open area, and trace.startsolid will be set
+//
+// type is one of the MOVE_ values such as MOVE_NOMONSTERS which skips box
+// entities, only colliding with SOLID_BSP entities (doors, lifts)
+//
+// passedict is excluded from clipping checks
+struct frameblend_s;
+struct skeleton_s;
+void Collision_ClipToGenericEntity(trace_t *trace, struct model_s *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);
+void Collision_ClipLineToGenericEntity(trace_t *trace, struct model_s *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);
+void Collision_ClipPointToGenericEntity(trace_t *trace, struct model_s *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);
+// like above but does not do a transform and does nothing if model is NULL
+void Collision_ClipToWorld(trace_t *trace, struct model_s *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);
+void Collision_ClipLineToWorld(trace_t *trace, struct model_s *model, const vec3_t start, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, float extend, qbool hitsurfaces);
+void Collision_ClipPointToWorld(trace_t *trace, struct model_s *model, const vec3_t start, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask);
+// caching surface trace for renderer (NOT THREAD SAFE)
+void Collision_Cache_ClipLineToGenericEntitySurfaces(trace_t *trace, struct model_s *model, matrix4x4_t *matrix, matrix4x4_t *inversematrix, const vec3_t start, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask);
+void Collision_Cache_ClipLineToWorldSurfaces(trace_t *trace, struct model_s *model, const vec3_t start, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask);
+// combines data from two traces:
+// merges contents flags, startsolid, allsolid, inwater
+// updates fraction, endpos, plane and surface info if new fraction is shorter
+void Collision_CombineTraces(trace_t *cliptrace, const trace_t *trace, void *touch, qbool isbmodel);
+