+ mins[0] -= 1;
+ mins[1] -= 1;
+ mins[2] -= 1;
+ maxs[0] += 1;
+ maxs[1] += 1;
+ maxs[2] += 1;
+}
+
+//===========================================
+
+static void Collision_TranslateBrush(const vec3_t shift, colbrushf_t *brush)
+{
+ int i;
+ // now we can transform the data
+ for(i = 0; i < brush->numplanes; ++i)
+ {
+ brush->planes[i].dist += DotProduct(shift, brush->planes[i].normal);
+ }
+ for(i = 0; i < brush->numpoints; ++i)
+ {
+ VectorAdd(brush->points[i].v, shift, brush->points[i].v);
+ }
+ VectorAdd(brush->mins, shift, brush->mins);
+ VectorAdd(brush->maxs, shift, brush->maxs);
+}
+
+static void Collision_TransformBrush(const matrix4x4_t *matrix, colbrushf_t *brush)
+{
+ int i;
+ vec3_t v;
+ // we're breaking any AABB properties here...
+ brush->isaabb = false;
+ brush->hasaabbplanes = false;
+ // now we can transform the data
+ for(i = 0; i < brush->numplanes; ++i)
+ {
+ Matrix4x4_TransformPositivePlane(matrix, brush->planes[i].normal[0], brush->planes[i].normal[1], brush->planes[i].normal[2], brush->planes[i].dist, brush->planes[i].normal_and_dist);
+ }
+ for(i = 0; i < brush->numedgedirs; ++i)
+ {
+ Matrix4x4_Transform(matrix, brush->edgedirs[i].v, v);
+ VectorCopy(v, brush->edgedirs[i].v);
+ }
+ for(i = 0; i < brush->numpoints; ++i)
+ {
+ Matrix4x4_Transform(matrix, brush->points[i].v, v);
+ VectorCopy(v, brush->points[i].v);
+ }
+ VectorCopy(brush->points[0].v, brush->mins);
+ VectorCopy(brush->points[0].v, brush->maxs);
+ for(i = 1; i < brush->numpoints; ++i)
+ {
+ if(brush->points[i].v[0] < brush->mins[0]) brush->mins[0] = brush->points[i].v[0];
+ if(brush->points[i].v[1] < brush->mins[1]) brush->mins[1] = brush->points[i].v[1];
+ if(brush->points[i].v[2] < brush->mins[2]) brush->mins[2] = brush->points[i].v[2];
+ if(brush->points[i].v[0] > brush->maxs[0]) brush->maxs[0] = brush->points[i].v[0];
+ if(brush->points[i].v[1] > brush->maxs[1]) brush->maxs[1] = brush->points[i].v[1];
+ if(brush->points[i].v[2] > brush->maxs[2]) brush->maxs[2] = brush->points[i].v[2];
+ }
+}
+
+typedef struct collision_cachedtrace_parameters_s
+{
+ dp_model_t *model;
+ vec3_t end;
+ vec3_t start;
+ int hitsupercontentsmask;
+ int skipsupercontentsmask;
+ int skipmaterialflagsmask;
+ matrix4x4_t matrix;
+}
+collision_cachedtrace_parameters_t;
+
+typedef struct collision_cachedtrace_s
+{
+ qboolean valid;
+ collision_cachedtrace_parameters_t p;
+ trace_t result;
+}
+collision_cachedtrace_t;
+
+static mempool_t *collision_cachedtrace_mempool;
+static collision_cachedtrace_t *collision_cachedtrace_array;
+static int collision_cachedtrace_firstfree;
+static int collision_cachedtrace_lastused;
+static int collision_cachedtrace_max;
+static unsigned char collision_cachedtrace_sequence;
+static int collision_cachedtrace_hashsize;
+static int *collision_cachedtrace_hash;
+static unsigned int *collision_cachedtrace_arrayfullhashindex;
+static unsigned int *collision_cachedtrace_arrayhashindex;
+static unsigned int *collision_cachedtrace_arraynext;
+static unsigned char *collision_cachedtrace_arrayused;
+static qboolean collision_cachedtrace_rebuildhash;
+
+void Collision_Cache_Reset(qboolean resetlimits)
+{
+ if (collision_cachedtrace_hash)
+ Mem_Free(collision_cachedtrace_hash);
+ if (collision_cachedtrace_array)
+ Mem_Free(collision_cachedtrace_array);
+ if (collision_cachedtrace_arrayfullhashindex)
+ Mem_Free(collision_cachedtrace_arrayfullhashindex);
+ if (collision_cachedtrace_arrayhashindex)
+ Mem_Free(collision_cachedtrace_arrayhashindex);
+ if (collision_cachedtrace_arraynext)
+ Mem_Free(collision_cachedtrace_arraynext);
+ if (collision_cachedtrace_arrayused)
+ Mem_Free(collision_cachedtrace_arrayused);
+ if (resetlimits || !collision_cachedtrace_max)
+ collision_cachedtrace_max = collision_cache.integer ? 128 : 1;
+ collision_cachedtrace_firstfree = 1;
+ collision_cachedtrace_lastused = 0;
+ collision_cachedtrace_hashsize = collision_cachedtrace_max;
+ collision_cachedtrace_array = (collision_cachedtrace_t *)Mem_Alloc(collision_cachedtrace_mempool, collision_cachedtrace_max * sizeof(collision_cachedtrace_t));
+ collision_cachedtrace_hash = (int *)Mem_Alloc(collision_cachedtrace_mempool, collision_cachedtrace_hashsize * sizeof(int));
+ collision_cachedtrace_arrayfullhashindex = (unsigned int *)Mem_Alloc(collision_cachedtrace_mempool, collision_cachedtrace_max * sizeof(unsigned int));
+ collision_cachedtrace_arrayhashindex = (unsigned int *)Mem_Alloc(collision_cachedtrace_mempool, collision_cachedtrace_max * sizeof(unsigned int));
+ collision_cachedtrace_arraynext = (unsigned int *)Mem_Alloc(collision_cachedtrace_mempool, collision_cachedtrace_max * sizeof(unsigned int));
+ collision_cachedtrace_arrayused = (unsigned char *)Mem_Alloc(collision_cachedtrace_mempool, collision_cachedtrace_max * sizeof(unsigned char));
+ collision_cachedtrace_sequence = 1;
+ collision_cachedtrace_rebuildhash = false;
+}
+
+void Collision_Cache_Init(mempool_t *mempool)
+{
+ collision_cachedtrace_mempool = mempool;
+ Collision_Cache_Reset(true);
+}
+
+static void Collision_Cache_RebuildHash(void)
+{
+ int index;
+ int range = collision_cachedtrace_lastused + 1;
+ unsigned char sequence = collision_cachedtrace_sequence;
+ int firstfree = collision_cachedtrace_max;
+ int lastused = 0;
+ int *hash = collision_cachedtrace_hash;
+ unsigned int hashindex;
+ unsigned int *arrayhashindex = collision_cachedtrace_arrayhashindex;
+ unsigned int *arraynext = collision_cachedtrace_arraynext;
+ collision_cachedtrace_rebuildhash = false;
+ memset(collision_cachedtrace_hash, 0, collision_cachedtrace_hashsize * sizeof(int));
+ for (index = 1;index < range;index++)
+ {
+ if (collision_cachedtrace_arrayused[index] == sequence)
+ {
+ hashindex = arrayhashindex[index];
+ arraynext[index] = hash[hashindex];
+ hash[hashindex] = index;
+ lastused = index;
+ }
+ else
+ {
+ if (firstfree > index)
+ firstfree = index;
+ collision_cachedtrace_arrayused[index] = 0;
+ }
+ }
+ collision_cachedtrace_firstfree = firstfree;
+ collision_cachedtrace_lastused = lastused;
+}
+
+void Collision_Cache_NewFrame(void)
+{
+ if (collision_cache.integer)
+ {
+ if (collision_cachedtrace_max < 128)
+ Collision_Cache_Reset(true);
+ }
+ else
+ {
+ if (collision_cachedtrace_max > 1)
+ Collision_Cache_Reset(true);
+ }
+ // rebuild hash if sequence would overflow byte, otherwise increment
+ if (collision_cachedtrace_sequence == 255)
+ {
+ Collision_Cache_RebuildHash();
+ collision_cachedtrace_sequence = 1;
+ }
+ else
+ {
+ collision_cachedtrace_rebuildhash = true;
+ collision_cachedtrace_sequence++;
+ }
+}
+
+static unsigned int Collision_Cache_HashIndexForArray(unsigned int *array, unsigned int size)
+{
+ unsigned int i;
+ unsigned int hashindex = 0;
+ // this is a super-cheesy checksum, designed only for speed
+ for (i = 0;i < size;i++)
+ hashindex += array[i] * (1 + i);
+ return hashindex;
+}
+
+static collision_cachedtrace_t *Collision_Cache_Lookup(dp_model_t *model, const matrix4x4_t *matrix, const matrix4x4_t *inversematrix, const vec3_t start, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
+{
+ int hashindex = 0;
+ unsigned int fullhashindex;
+ int index = 0;
+ int range;
+ unsigned char sequence = collision_cachedtrace_sequence;
+ int *hash = collision_cachedtrace_hash;
+ unsigned int *arrayfullhashindex = collision_cachedtrace_arrayfullhashindex;
+ unsigned int *arraynext = collision_cachedtrace_arraynext;
+ collision_cachedtrace_t *cached = collision_cachedtrace_array + index;
+ collision_cachedtrace_parameters_t params;
+ // all non-cached traces use the same index
+ if (!collision_cache.integer)
+ r_refdef.stats[r_stat_photoncache_traced]++;
+ else
+ {
+ // cached trace lookup
+ memset(¶ms, 0, sizeof(params));
+ params.model = model;
+ VectorCopy(start, params.start);
+ VectorCopy(end, params.end);
+ params.hitsupercontentsmask = hitsupercontentsmask;
+ params.skipsupercontentsmask = skipsupercontentsmask;
+ params.skipmaterialflagsmask = skipmaterialflagsmask;
+ params.matrix = *matrix;
+ fullhashindex = Collision_Cache_HashIndexForArray((unsigned int *)¶ms, sizeof(params) / sizeof(unsigned int));
+ hashindex = (int)(fullhashindex % (unsigned int)collision_cachedtrace_hashsize);
+ for (index = hash[hashindex];index;index = arraynext[index])
+ {
+ if (arrayfullhashindex[index] != fullhashindex)
+ continue;
+ cached = collision_cachedtrace_array + index;
+ //if (memcmp(&cached->p, ¶ms, sizeof(params)))
+ if (cached->p.model != params.model
+ || cached->p.end[0] != params.end[0]
+ || cached->p.end[1] != params.end[1]
+ || cached->p.end[2] != params.end[2]
+ || cached->p.start[0] != params.start[0]
+ || cached->p.start[1] != params.start[1]
+ || cached->p.start[2] != params.start[2]
+ || cached->p.hitsupercontentsmask != params.hitsupercontentsmask
+ || cached->p.skipsupercontentsmask != params.skipsupercontentsmask
+ || cached->p.skipmaterialflagsmask != params.skipmaterialflagsmask
+ || cached->p.matrix.m[0][0] != params.matrix.m[0][0]
+ || cached->p.matrix.m[0][1] != params.matrix.m[0][1]
+ || cached->p.matrix.m[0][2] != params.matrix.m[0][2]
+ || cached->p.matrix.m[0][3] != params.matrix.m[0][3]
+ || cached->p.matrix.m[1][0] != params.matrix.m[1][0]
+ || cached->p.matrix.m[1][1] != params.matrix.m[1][1]
+ || cached->p.matrix.m[1][2] != params.matrix.m[1][2]
+ || cached->p.matrix.m[1][3] != params.matrix.m[1][3]
+ || cached->p.matrix.m[2][0] != params.matrix.m[2][0]
+ || cached->p.matrix.m[2][1] != params.matrix.m[2][1]
+ || cached->p.matrix.m[2][2] != params.matrix.m[2][2]
+ || cached->p.matrix.m[2][3] != params.matrix.m[2][3]
+ || cached->p.matrix.m[3][0] != params.matrix.m[3][0]
+ || cached->p.matrix.m[3][1] != params.matrix.m[3][1]
+ || cached->p.matrix.m[3][2] != params.matrix.m[3][2]
+ || cached->p.matrix.m[3][3] != params.matrix.m[3][3]
+ )
+ continue;
+ // found a matching trace in the cache
+ r_refdef.stats[r_stat_photoncache_cached]++;
+ cached->valid = true;
+ collision_cachedtrace_arrayused[index] = collision_cachedtrace_sequence;
+ return cached;
+ }
+ r_refdef.stats[r_stat_photoncache_traced]++;
+ // find an unused cache entry
+ for (index = collision_cachedtrace_firstfree, range = collision_cachedtrace_max;index < range;index++)
+ if (collision_cachedtrace_arrayused[index] == 0)
+ break;
+ if (index == range)
+ {
+ // all claimed, but probably some are stale...
+ for (index = 1, range = collision_cachedtrace_max;index < range;index++)
+ if (collision_cachedtrace_arrayused[index] != sequence)
+ break;
+ if (index < range)
+ {
+ // found a stale one, rebuild the hash
+ Collision_Cache_RebuildHash();
+ }
+ else
+ {
+ // we need to grow the cache
+ collision_cachedtrace_max *= 2;
+ Collision_Cache_Reset(false);
+ index = 1;
+ }
+ }
+ // link the new cache entry into the hash bucket
+ collision_cachedtrace_firstfree = index + 1;
+ if (collision_cachedtrace_lastused < index)
+ collision_cachedtrace_lastused = index;
+ cached = collision_cachedtrace_array + index;
+ collision_cachedtrace_arraynext[index] = collision_cachedtrace_hash[hashindex];
+ collision_cachedtrace_hash[hashindex] = index;
+ collision_cachedtrace_arrayhashindex[index] = hashindex;
+ cached->valid = false;
+ cached->p = params;
+ collision_cachedtrace_arrayfullhashindex[index] = fullhashindex;
+ collision_cachedtrace_arrayused[index] = collision_cachedtrace_sequence;
+ }
+ return cached;
+}
+
+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)
+{
+ collision_cachedtrace_t *cached = Collision_Cache_Lookup(model, matrix, inversematrix, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
+ if (cached->valid)
+ {
+ *trace = cached->result;
+ return;
+ }
+
+ Collision_ClipLineToGenericEntity(trace, model, NULL, NULL, vec3_origin, vec3_origin, 0, matrix, inversematrix, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, collision_extendmovelength.value, true);
+
+ cached->result = *trace;
+}
+
+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)
+{
+ collision_cachedtrace_t *cached = Collision_Cache_Lookup(model, &identitymatrix, &identitymatrix, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
+ if (cached->valid)
+ {
+ *trace = cached->result;
+ return;
+ }
+
+ Collision_ClipLineToWorld(trace, model, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, collision_extendmovelength.value, true);
+
+ cached->result = *trace;
+}
+
+typedef struct extendtraceinfo_s
+{
+ trace_t *trace;
+ float realstart[3];
+ float realend[3];
+ float realdelta[3];
+ float extendstart[3];
+ float extendend[3];
+ float extenddelta[3];
+ float reallength;
+ float extendlength;
+ float scaletoextend;
+ float extend;
+}
+extendtraceinfo_t;
+
+static void Collision_ClipExtendPrepare(extendtraceinfo_t *extendtraceinfo, trace_t *trace, const vec3_t tstart, const vec3_t tend, float textend)
+{
+ memset(trace, 0, sizeof(*trace));
+ trace->fraction = 1;
+
+ extendtraceinfo->trace = trace;
+ VectorCopy(tstart, extendtraceinfo->realstart);
+ VectorCopy(tend, extendtraceinfo->realend);
+ VectorSubtract(extendtraceinfo->realend, extendtraceinfo->realstart, extendtraceinfo->realdelta);
+ VectorCopy(extendtraceinfo->realstart, extendtraceinfo->extendstart);
+ VectorCopy(extendtraceinfo->realend, extendtraceinfo->extendend);
+ VectorCopy(extendtraceinfo->realdelta, extendtraceinfo->extenddelta);
+ extendtraceinfo->reallength = VectorLength(extendtraceinfo->realdelta);
+ extendtraceinfo->extendlength = extendtraceinfo->reallength;
+ extendtraceinfo->scaletoextend = 1.0f;
+ extendtraceinfo->extend = textend;
+
+ // make the trace longer according to the extend parameter
+ if (extendtraceinfo->reallength && extendtraceinfo->extend)
+ {
+ extendtraceinfo->extendlength = extendtraceinfo->reallength + extendtraceinfo->extend;
+ extendtraceinfo->scaletoextend = extendtraceinfo->extendlength / extendtraceinfo->reallength;
+ VectorMA(extendtraceinfo->realstart, extendtraceinfo->scaletoextend, extendtraceinfo->realdelta, extendtraceinfo->extendend);
+ VectorSubtract(extendtraceinfo->extendend, extendtraceinfo->extendstart, extendtraceinfo->extenddelta);
+ }
+}
+
+static void Collision_ClipExtendFinish(extendtraceinfo_t *extendtraceinfo)
+{
+ trace_t *trace = extendtraceinfo->trace;
+
+ if (trace->fraction != 1.0f)
+ {
+ // undo the extended trace length
+ trace->fraction *= extendtraceinfo->scaletoextend;
+
+ // if the extended trace hit something that the unextended trace did not hit (even considering the collision_impactnudge), then we have to clear the hit information
+ if (trace->fraction > 1.0f)
+ {
+ // note that ent may refer to either startsolid or fraction<1, we can't restore the startsolid ent unfortunately
+ trace->ent = NULL;
+ trace->hitq3surfaceflags = 0;
+ trace->hitsupercontents = 0;
+ trace->hittexture = NULL;
+ VectorClear(trace->plane.normal);
+ trace->plane.dist = 0.0f;
+ }
+ }
+
+ // clamp things
+ trace->fraction = bound(0, trace->fraction, 1);
+
+ // calculate the end position
+ VectorMA(extendtraceinfo->realstart, trace->fraction, extendtraceinfo->realdelta, trace->endpos);
+}
+
+void Collision_ClipToGenericEntity(trace_t *trace, dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, const vec3_t bodymins, const vec3_t bodymaxs, int bodysupercontents, matrix4x4_t *matrix, matrix4x4_t *inversematrix, const vec3_t tstart, const vec3_t mins, const vec3_t maxs, const vec3_t tend, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, float extend)
+{
+ vec3_t starttransformed, endtransformed;
+ extendtraceinfo_t extendtraceinfo;
+ Collision_ClipExtendPrepare(&extendtraceinfo, trace, tstart, tend, extend);
+
+ Matrix4x4_Transform(inversematrix, extendtraceinfo.extendstart, starttransformed);
+ Matrix4x4_Transform(inversematrix, extendtraceinfo.extendend, endtransformed);
+#if COLLISIONPARANOID >= 3
+ Con_Printf("trans(%f %f %f -> %f %f %f, %f %f %f -> %f %f %f)", extendtraceinfo.extendstart[0], extendtraceinfo.extendstart[1], extendtraceinfo.extendstart[2], starttransformed[0], starttransformed[1], starttransformed[2], extendtraceinfo.extendend[0], extendtraceinfo.extendend[1], extendtraceinfo.extendend[2], endtransformed[0], endtransformed[1], endtransformed[2]);
+#endif
+
+ if (model && model->TraceBox)
+ {
+ if(model->TraceBrush && (inversematrix->m[0][1] || inversematrix->m[0][2] || inversematrix->m[1][0] || inversematrix->m[1][2] || inversematrix->m[2][0] || inversematrix->m[2][1]))
+ {
+ // we get here if TraceBrush exists, AND we have a rotation component (SOLID_BSP case)
+ // using starttransformed, endtransformed is WRONG in this case!
+ // should rather build a brush and trace using it
+ colboxbrushf_t thisbrush_start, thisbrush_end;
+ Collision_BrushForBox(&thisbrush_start, mins, maxs, 0, 0, NULL);
+ Collision_BrushForBox(&thisbrush_end, mins, maxs, 0, 0, NULL);
+ Collision_TranslateBrush(extendtraceinfo.extendstart, &thisbrush_start.brush);
+ Collision_TranslateBrush(extendtraceinfo.extendend, &thisbrush_end.brush);
+ Collision_TransformBrush(inversematrix, &thisbrush_start.brush);
+ Collision_TransformBrush(inversematrix, &thisbrush_end.brush);
+ //Collision_TranslateBrush(starttransformed, &thisbrush_start.brush);
+ //Collision_TranslateBrush(endtransformed, &thisbrush_end.brush);
+ model->TraceBrush(model, frameblend, skeleton, trace, &thisbrush_start.brush, &thisbrush_end.brush, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
+ }
+ else // this is only approximate if rotated, quite useless
+ model->TraceBox(model, frameblend, skeleton, trace, starttransformed, mins, maxs, endtransformed, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
+ }
+ else // and this requires that the transformation matrix doesn't have angles components, like SV_TraceBox ensures; FIXME may get called if a model is SOLID_BSP but has no TraceBox function
+ Collision_ClipTrace_Box(trace, bodymins, bodymaxs, starttransformed, mins, maxs, endtransformed, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, bodysupercontents, 0, NULL);
+
+ Collision_ClipExtendFinish(&extendtraceinfo);
+
+ // transform plane
+ // NOTE: this relies on plane.dist being directly after plane.normal
+ Matrix4x4_TransformPositivePlane(matrix, trace->plane.normal[0], trace->plane.normal[1], trace->plane.normal[2], trace->plane.dist, trace->plane.normal_and_dist);
+}
+
+void Collision_ClipToWorld(trace_t *trace, dp_model_t *model, const vec3_t tstart, const vec3_t mins, const vec3_t maxs, const vec3_t tend, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, float extend)
+{
+ extendtraceinfo_t extendtraceinfo;
+ Collision_ClipExtendPrepare(&extendtraceinfo, trace, tstart, tend, extend);
+ // ->TraceBox: TraceBrush not needed here, as worldmodel is never rotated
+ if (model && model->TraceBox)
+ model->TraceBox(model, NULL, NULL, trace, extendtraceinfo.extendstart, mins, maxs, extendtraceinfo.extendend, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
+ Collision_ClipExtendFinish(&extendtraceinfo);