/**
* @brief Moves the given box volume through the world from start to end.
*
* The skipped edict, and edicts owned by him, are explicitly not checked.
* This prevents players from clipping against their own projectiles, etc.
*/
cm_trace_t Sv_Trace(const vec3_t start, const vec3_t end, const vec3_t mins, const vec3_t maxs,
const g_entity_t *skip, const int32_t contents) {
sv_trace_t trace;
memset(&trace, 0, sizeof(trace));
if (!mins) {
mins = vec3_origin;
}
if (!maxs) {
maxs = vec3_origin;
}
// clip to world
trace.trace = Cm_BoxTrace(start, end, mins, maxs, 0, contents);
if (trace.trace.fraction < 1.0) {
trace.trace.ent = svs.game->entities;
if (trace.trace.start_solid) { // blocked entirely
return trace.trace;
}
}
trace.start = start;
trace.end = end;
trace.mins = mins;
trace.maxs = maxs;
trace.skip = skip;
trace.contents = contents;
// create the bounding box of the entire move
Cm_TraceBounds(start, end, mins, maxs, trace.box_mins, trace.box_maxs);
// clip to other solid entities
Sv_ClipTraceToEntities(&trace);
return trace.trace;
}
/**
* @brief Client-side collision model tracing. This is the reciprocal of
* Sv_Trace.
*
* @param skip An optional entity number for which all tests are skipped. Pass
* 0 for none, because entity 0 is the world, which we always test.
*/
cm_trace_t Cl_Trace(const vec3_t start, const vec3_t end, const vec3_t mins, const vec3_t maxs,
const uint16_t skip, const int32_t contents) {
cl_trace_t trace;
memset(&trace, 0, sizeof(trace));
if (!mins) {
mins = vec3_origin;
}
if (!maxs) {
maxs = vec3_origin;
}
// clip to world
trace.trace = Cm_BoxTrace(start, end, mins, maxs, 0, contents);
if (trace.trace.fraction < 1.0) {
trace.trace.ent = (struct g_entity_s *) (intptr_t) - 1;
if (trace.trace.start_solid) { // blocked entirely
return trace.trace;
}
}
trace.start = start;
trace.end = end;
trace.mins = mins;
trace.maxs = maxs;
trace.skip = skip;
trace.contents = contents;
Cm_TraceBounds(start, end, mins, maxs, trace.box_mins, trace.box_maxs);
Cl_ClipTraceToEntities(&trace);
return trace.trace;
}