#endif
cvar_t collision_debug_tracelineasbox = {0, "collision_debug_tracelineasbox", "0", "workaround for any bugs in Collision_TraceLineBrushFloat by using Collision_TraceBrushBrushFloat"};
cvar_t collision_cache = {0, "collision_cache", "1", "store results of collision traces for next frame to reuse if possible (optimization)"};
+//cvar_t collision_triangle_neighborsides = {0, "collision_triangle_neighborsides", "1", "override automatic side generation if triangle has neighbors with face planes that form a convex edge (perfect solution, but can not work for all edges)"};
+cvar_t collision_triangle_bevelsides = {0, "collision_triangle_bevelsides", "1", "generate sloped edge planes on triangles - if 0, see axialedgeplanes"};
+cvar_t collision_triangle_axialsides = {0, "collision_triangle_axialsides", "1", "generate axially-aligned edge planes on triangles - otherwise use perpendicular edge planes"};
mempool_t *collision_mempool;
#endif
Cvar_RegisterVariable(&collision_debug_tracelineasbox);
Cvar_RegisterVariable(&collision_cache);
+// Cvar_RegisterVariable(&collision_triangle_neighborsides);
+ Cvar_RegisterVariable(&collision_triangle_bevelsides);
+ Cvar_RegisterVariable(&collision_triangle_axialsides);
collision_mempool = Mem_AllocPool("collision cache", 0, NULL);
Collision_Cache_Init(collision_mempool);
}
-void Collision_PrintBrushAsQHull(colbrushf_t *brush, const char *name)
+static void Collision_PrintBrushAsQHull(colbrushf_t *brush, const char *name)
{
int i;
Con_Printf("3 %s\n%i\n", name, brush->numpoints);
Con_Printf("%f %f %f %f\n", brush->planes[i].normal[0], brush->planes[i].normal[1], brush->planes[i].normal[2], brush->planes[i].dist);
}
-void Collision_ValidateBrush(colbrushf_t *brush)
+static void Collision_ValidateBrush(colbrushf_t *brush)
{
int j, k, pointsoffplanes, pointonplanes, pointswithinsufficientplanes, printbrush;
float d;
Collision_PrintBrushAsQHull(brush, "unnamed");
}
-float nearestplanedist_float(const float *normal, const colpointf_t *points, int numpoints)
+static float nearestplanedist_float(const float *normal, const colpointf_t *points, int numpoints)
{
float dist, bestdist;
if (!numpoints)
return bestdist;
}
-float furthestplanedist_float(const float *normal, const colpointf_t *points, int numpoints)
+static float furthestplanedist_float(const float *normal, const colpointf_t *points, int numpoints)
{
float dist, bestdist;
if (!numpoints)
return bestdist;
}
-void Collision_CalcEdgeDirsForPolygonBrushFloat(colbrushf_t *brush)
+static void Collision_CalcEdgeDirsForPolygonBrushFloat(colbrushf_t *brush)
{
int i, j;
for (i = 0, j = brush->numpoints - 1;i < brush->numpoints;j = i, i++)
-void Collision_CalcPlanesForPolygonBrushFloat(colbrushf_t *brush)
+void Collision_CalcPlanesForTriangleBrushFloat(colbrushf_t *brush)
{
int i;
- float edge0[3], edge1[3], edge2[3], normal[3], dist, bestdist;
- colpointf_t *p, *p2;
+ float edge0[3], edge1[3], edge2[3];
+ colpointf_t *p;
- // FIXME: these probably don't actually need to be normalized if the collision code does not care
- if (brush->numpoints == 3)
+ TriangleNormal(brush->points[0].v, brush->points[1].v, brush->points[2].v, brush->planes[0].normal);
+ if (DotProduct(brush->planes[0].normal, brush->planes[0].normal) < 0.0001f)
{
- // optimized triangle case
- TriangleNormal(brush->points[0].v, brush->points[1].v, brush->points[2].v, brush->planes[0].normal);
- if (DotProduct(brush->planes[0].normal, brush->planes[0].normal) < 0.0001f)
- {
- // there's no point in processing a degenerate triangle (GIGO - Garbage In, Garbage Out)
- brush->numplanes = 0;
- return;
- }
- else
- {
- brush->numplanes = 5;
- brush->numedgedirs = 3;
- VectorNormalize(brush->planes[0].normal);
- brush->planes[0].dist = DotProduct(brush->points->v, brush->planes[0].normal);
- VectorNegate(brush->planes[0].normal, brush->planes[1].normal);
- brush->planes[1].dist = -brush->planes[0].dist;
- VectorSubtract(brush->points[2].v, brush->points[0].v, edge0);
- VectorSubtract(brush->points[0].v, brush->points[1].v, edge1);
- VectorSubtract(brush->points[1].v, brush->points[2].v, edge2);
- VectorCopy(edge0, brush->edgedirs[0].v);
- VectorCopy(edge1, brush->edgedirs[1].v);
- VectorCopy(edge2, brush->edgedirs[2].v);
-#if 1
- {
- float projectionnormal[3], projectionedge0[3], projectionedge1[3], projectionedge2[3];
- int i, best;
- float dist, bestdist;
- bestdist = fabs(brush->planes[0].normal[0]);
- best = 0;
- for (i = 1;i < 3;i++)
- {
- dist = fabs(brush->planes[0].normal[i]);
- if (bestdist < dist)
- {
- bestdist = dist;
- best = i;
- }
- }
- VectorClear(projectionnormal);
- if (brush->planes[0].normal[best] < 0)
- projectionnormal[best] = -1;
- else
- projectionnormal[best] = 1;
- VectorCopy(edge0, projectionedge0);
- VectorCopy(edge1, projectionedge1);
- VectorCopy(edge2, projectionedge2);
- projectionedge0[best] = 0;
- projectionedge1[best] = 0;
- projectionedge2[best] = 0;
- CrossProduct(projectionedge0, projectionnormal, brush->planes[2].normal);
- CrossProduct(projectionedge1, projectionnormal, brush->planes[3].normal);
- CrossProduct(projectionedge2, projectionnormal, brush->planes[4].normal);
- }
-#else
- CrossProduct(edge0, brush->planes->normal, brush->planes[2].normal);
- CrossProduct(edge1, brush->planes->normal, brush->planes[3].normal);
- CrossProduct(edge2, brush->planes->normal, brush->planes[4].normal);
-#endif
- VectorNormalize(brush->planes[2].normal);
- VectorNormalize(brush->planes[3].normal);
- VectorNormalize(brush->planes[4].normal);
- brush->planes[2].dist = DotProduct(brush->points[2].v, brush->planes[2].normal);
- brush->planes[3].dist = DotProduct(brush->points[0].v, brush->planes[3].normal);
- brush->planes[4].dist = DotProduct(brush->points[1].v, brush->planes[4].normal);
-
- if (developer_extra.integer)
- {
- // validation code
-#if 0
- float temp[3];
-
- VectorSubtract(brush->points[0].v, brush->points[1].v, edge0);
- VectorSubtract(brush->points[2].v, brush->points[1].v, edge1);
- CrossProduct(edge0, edge1, normal);
- VectorNormalize(normal);
- VectorSubtract(normal, brush->planes[0].normal, temp);
- if (VectorLength(temp) > 0.01f)
- Con_DPrintf("Collision_CalcPlanesForPolygonBrushFloat: TriangleNormal gave wrong answer (%f %f %f != correct answer %f %f %f)\n", brush->planes->normal[0], brush->planes->normal[1], brush->planes->normal[2], normal[0], normal[1], normal[2]);
- if (fabs(DotProduct(brush->planes[1].normal, brush->planes[0].normal) - -1.0f) > 0.01f || fabs(brush->planes[1].dist - -brush->planes[0].dist) > 0.01f)
- Con_DPrintf("Collision_CalcPlanesForPolygonBrushFloat: plane 1 (%f %f %f %f) is not opposite plane 0 (%f %f %f %f)\n", brush->planes[1].normal[0], brush->planes[1].normal[1], brush->planes[1].normal[2], brush->planes[1].dist, brush->planes[0].normal[0], brush->planes[0].normal[1], brush->planes[0].normal[2], brush->planes[0].dist);
-#if 0
- if (fabs(DotProduct(brush->planes[2].normal, brush->planes[0].normal)) > 0.01f)
- Con_DPrintf("Collision_CalcPlanesForPolygonBrushFloat: plane 2 (%f %f %f %f) is not perpendicular to plane 0 (%f %f %f %f)\n", brush->planes[2].normal[0], brush->planes[2].normal[1], brush->planes[2].normal[2], brush->planes[2].dist, brush->planes[0].normal[0], brush->planes[0].normal[1], brush->planes[0].normal[2], brush->planes[2].dist);
- if (fabs(DotProduct(brush->planes[3].normal, brush->planes[0].normal)) > 0.01f)
- Con_DPrintf("Collision_CalcPlanesForPolygonBrushFloat: plane 3 (%f %f %f %f) is not perpendicular to plane 0 (%f %f %f %f)\n", brush->planes[3].normal[0], brush->planes[3].normal[1], brush->planes[3].normal[2], brush->planes[3].dist, brush->planes[0].normal[0], brush->planes[0].normal[1], brush->planes[0].normal[2], brush->planes[3].dist);
- if (fabs(DotProduct(brush->planes[4].normal, brush->planes[0].normal)) > 0.01f)
- Con_DPrintf("Collision_CalcPlanesForPolygonBrushFloat: plane 4 (%f %f %f %f) is not perpendicular to plane 0 (%f %f %f %f)\n", brush->planes[4].normal[0], brush->planes[4].normal[1], brush->planes[4].normal[2], brush->planes[4].dist, brush->planes[0].normal[0], brush->planes[0].normal[1], brush->planes[0].normal[2], brush->planes[4].dist);
- if (fabs(DotProduct(brush->planes[2].normal, edge0)) > 0.01f)
- Con_DPrintf("Collision_CalcPlanesForPolygonBrushFloat: plane 2 (%f %f %f %f) is not perpendicular to edge 0 (%f %f %f to %f %f %f)\n", brush->planes[2].normal[0], brush->planes[2].normal[1], brush->planes[2].normal[2], brush->planes[2].dist, brush->points[2].v[0], brush->points[2].v[1], brush->points[2].v[2], brush->points[0].v[0], brush->points[0].v[1], brush->points[0].v[2]);
- if (fabs(DotProduct(brush->planes[3].normal, edge1)) > 0.01f)
- Con_DPrintf("Collision_CalcPlanesForPolygonBrushFloat: plane 3 (%f %f %f %f) is not perpendicular to edge 1 (%f %f %f to %f %f %f)\n", brush->planes[3].normal[0], brush->planes[3].normal[1], brush->planes[3].normal[2], brush->planes[3].dist, brush->points[0].v[0], brush->points[0].v[1], brush->points[0].v[2], brush->points[1].v[0], brush->points[1].v[1], brush->points[1].v[2]);
- if (fabs(DotProduct(brush->planes[4].normal, edge2)) > 0.01f)
- Con_DPrintf("Collision_CalcPlanesForPolygonBrushFloat: plane 4 (%f %f %f %f) is not perpendicular to edge 2 (%f %f %f to %f %f %f)\n", brush->planes[4].normal[0], brush->planes[4].normal[1], brush->planes[4].normal[2], brush->planes[4].dist, brush->points[1].v[0], brush->points[1].v[1], brush->points[1].v[2], brush->points[2].v[0], brush->points[2].v[1], brush->points[2].v[2]);
-#endif
-#endif
- if (fabs(DotProduct(brush->points[0].v, brush->planes[0].normal) - brush->planes[0].dist) > 0.01f || fabs(DotProduct(brush->points[1].v, brush->planes[0].normal) - brush->planes[0].dist) > 0.01f || fabs(DotProduct(brush->points[2].v, brush->planes[0].normal) - brush->planes[0].dist) > 0.01f)
- Con_DPrintf("Collision_CalcPlanesForPolygonBrushFloat: edges (%f %f %f to %f %f %f to %f %f %f) off front plane 0 (%f %f %f %f)\n", brush->points[0].v[0], brush->points[0].v[1], brush->points[0].v[2], brush->points[1].v[0], brush->points[1].v[1], brush->points[1].v[2], brush->points[2].v[0], brush->points[2].v[1], brush->points[2].v[2], brush->planes[0].normal[0], brush->planes[0].normal[1], brush->planes[0].normal[2], brush->planes[0].dist);
- if (fabs(DotProduct(brush->points[0].v, brush->planes[1].normal) - brush->planes[1].dist) > 0.01f || fabs(DotProduct(brush->points[1].v, brush->planes[1].normal) - brush->planes[1].dist) > 0.01f || fabs(DotProduct(brush->points[2].v, brush->planes[1].normal) - brush->planes[1].dist) > 0.01f)
- Con_DPrintf("Collision_CalcPlanesForPolygonBrushFloat: edges (%f %f %f to %f %f %f to %f %f %f) off back plane 1 (%f %f %f %f)\n", brush->points[0].v[0], brush->points[0].v[1], brush->points[0].v[2], brush->points[1].v[0], brush->points[1].v[1], brush->points[1].v[2], brush->points[2].v[0], brush->points[2].v[1], brush->points[2].v[2], brush->planes[1].normal[0], brush->planes[1].normal[1], brush->planes[1].normal[2], brush->planes[1].dist);
- if (fabs(DotProduct(brush->points[2].v, brush->planes[2].normal) - brush->planes[2].dist) > 0.01f || fabs(DotProduct(brush->points[0].v, brush->planes[2].normal) - brush->planes[2].dist) > 0.01f)
- Con_DPrintf("Collision_CalcPlanesForPolygonBrushFloat: edge 0 (%f %f %f to %f %f %f) off front plane 2 (%f %f %f %f)\n", brush->points[2].v[0], brush->points[2].v[1], brush->points[2].v[2], brush->points[0].v[0], brush->points[0].v[1], brush->points[0].v[2], brush->planes[2].normal[0], brush->planes[2].normal[1], brush->planes[2].normal[2], brush->planes[2].dist);
- if (fabs(DotProduct(brush->points[0].v, brush->planes[3].normal) - brush->planes[3].dist) > 0.01f || fabs(DotProduct(brush->points[1].v, brush->planes[3].normal) - brush->planes[3].dist) > 0.01f)
- Con_DPrintf("Collision_CalcPlanesForPolygonBrushFloat: edge 0 (%f %f %f to %f %f %f) off front plane 2 (%f %f %f %f)\n", brush->points[0].v[0], brush->points[0].v[1], brush->points[0].v[2], brush->points[1].v[0], brush->points[1].v[1], brush->points[1].v[2], brush->planes[3].normal[0], brush->planes[3].normal[1], brush->planes[3].normal[2], brush->planes[3].dist);
- if (fabs(DotProduct(brush->points[1].v, brush->planes[4].normal) - brush->planes[4].dist) > 0.01f || fabs(DotProduct(brush->points[2].v, brush->planes[4].normal) - brush->planes[4].dist) > 0.01f)
- Con_DPrintf("Collision_CalcPlanesForPolygonBrushFloat: edge 0 (%f %f %f to %f %f %f) off front plane 2 (%f %f %f %f)\n", brush->points[1].v[0], brush->points[1].v[1], brush->points[1].v[2], brush->points[2].v[0], brush->points[2].v[1], brush->points[2].v[2], brush->planes[4].normal[0], brush->planes[4].normal[1], brush->planes[4].normal[2], brush->planes[4].dist);
- }
- }
+ // there's no point in processing a degenerate triangle (GIGO - Garbage In, Garbage Out)
+ // note that some of these exist in q3bsp bspline patches
+ brush->numplanes = 0;
+ return;
}
- else
+
+ // there are 5 planes (front, back, sides) and 3 edges
+ brush->numplanes = 5;
+ brush->numedgedirs = 3;
+ VectorNormalize(brush->planes[0].normal);
+ brush->planes[0].dist = DotProduct(brush->points->v, brush->planes[0].normal);
+ VectorNegate(brush->planes[0].normal, brush->planes[1].normal);
+ brush->planes[1].dist = -brush->planes[0].dist;
+ // edge directions are easy to calculate
+ VectorSubtract(brush->points[2].v, brush->points[0].v, edge0);
+ VectorSubtract(brush->points[0].v, brush->points[1].v, edge1);
+ VectorSubtract(brush->points[1].v, brush->points[2].v, edge2);
+ VectorCopy(edge0, brush->edgedirs[0].v);
+ VectorCopy(edge1, brush->edgedirs[1].v);
+ VectorCopy(edge2, brush->edgedirs[2].v);
+ // now select an algorithm to generate the side planes
+ if (collision_triangle_bevelsides.integer)
{
- // choose best surface normal for polygon's plane
- bestdist = 0;
- for (i = 0, p = brush->points + 1;i < brush->numpoints - 2;i++, p++)
+ // use 45 degree slopes at the edges of the triangle to make a sinking trace error turn into "riding up" the slope rather than getting stuck
+ CrossProduct(edge0, brush->planes->normal, brush->planes[2].normal);
+ CrossProduct(edge1, brush->planes->normal, brush->planes[3].normal);
+ CrossProduct(edge2, brush->planes->normal, brush->planes[4].normal);
+ VectorNormalize(brush->planes[2].normal);
+ VectorNormalize(brush->planes[3].normal);
+ VectorNormalize(brush->planes[4].normal);
+ VectorAdd(brush->planes[2].normal, brush->planes[0].normal, brush->planes[2].normal);
+ VectorAdd(brush->planes[3].normal, brush->planes[0].normal, brush->planes[3].normal);
+ VectorAdd(brush->planes[4].normal, brush->planes[0].normal, brush->planes[4].normal);
+ VectorNormalize(brush->planes[2].normal);
+ VectorNormalize(brush->planes[3].normal);
+ VectorNormalize(brush->planes[4].normal);
+ }
+ else if (collision_triangle_axialsides.integer)
+ {
+ float projectionnormal[3], projectionedge0[3], projectionedge1[3], projectionedge2[3];
+ int i, best;
+ float dist, bestdist;
+ bestdist = fabs(brush->planes[0].normal[0]);
+ best = 0;
+ for (i = 1;i < 3;i++)
{
- VectorSubtract(p[-1].v, p[0].v, edge0);
- VectorSubtract(p[1].v, p[0].v, edge1);
- CrossProduct(edge0, edge1, normal);
- //TriangleNormal(p[-1].v, p[0].v, p[1].v, normal);
- dist = DotProduct(normal, normal);
- if (i == 0 || bestdist < dist)
+ dist = fabs(brush->planes[0].normal[i]);
+ if (bestdist < dist)
{
bestdist = dist;
- VectorCopy(normal, brush->planes->normal);
+ best = i;
}
}
- if (bestdist < 0.0001f)
- {
- // there's no point in processing a degenerate triangle (GIGO - Garbage In, Garbage Out)
- brush->numplanes = 0;
- return;
- }
+ VectorClear(projectionnormal);
+ if (brush->planes[0].normal[best] < 0)
+ projectionnormal[best] = -1;
else
- {
- brush->numplanes = brush->numpoints + 2;
- VectorNormalize(brush->planes->normal);
- brush->planes->dist = DotProduct(brush->points->v, brush->planes->normal);
-
- // negate plane to create other side
- VectorNegate(brush->planes[0].normal, brush->planes[1].normal);
- brush->planes[1].dist = -brush->planes[0].dist;
- for (i = 0, p = brush->points + (brush->numpoints - 1), p2 = brush->points;i < brush->numpoints;i++, p = p2, p2++)
- {
- VectorSubtract(p->v, p2->v, edge0);
- CrossProduct(edge0, brush->planes->normal, brush->planes[i + 2].normal);
- VectorNormalize(brush->planes[i + 2].normal);
- brush->planes[i + 2].dist = DotProduct(p->v, brush->planes[i + 2].normal);
- }
- }
+ projectionnormal[best] = 1;
+ VectorCopy(edge0, projectionedge0);
+ VectorCopy(edge1, projectionedge1);
+ VectorCopy(edge2, projectionedge2);
+ projectionedge0[best] = 0;
+ projectionedge1[best] = 0;
+ projectionedge2[best] = 0;
+ CrossProduct(projectionedge0, projectionnormal, brush->planes[2].normal);
+ CrossProduct(projectionedge1, projectionnormal, brush->planes[3].normal);
+ CrossProduct(projectionedge2, projectionnormal, brush->planes[4].normal);
+ VectorNormalize(brush->planes[2].normal);
+ VectorNormalize(brush->planes[3].normal);
+ VectorNormalize(brush->planes[4].normal);
}
+ else
+ {
+ CrossProduct(edge0, brush->planes->normal, brush->planes[2].normal);
+ CrossProduct(edge1, brush->planes->normal, brush->planes[3].normal);
+ CrossProduct(edge2, brush->planes->normal, brush->planes[4].normal);
+ VectorNormalize(brush->planes[2].normal);
+ VectorNormalize(brush->planes[3].normal);
+ VectorNormalize(brush->planes[4].normal);
+ }
+ brush->planes[2].dist = DotProduct(brush->points[2].v, brush->planes[2].normal);
+ brush->planes[3].dist = DotProduct(brush->points[0].v, brush->planes[3].normal);
+ brush->planes[4].dist = DotProduct(brush->points[1].v, brush->planes[4].normal);
if (developer_extra.integer)
{
}
}
-void Collision_SnapCopyPoints(int numpoints, const colpointf_t *in, colpointf_t *out, float fractionprecision, float invfractionprecision)
+static void Collision_SnapCopyPoints(int numpoints, const colpointf_t *in, colpointf_t *out, float fractionprecision, float invfractionprecision)
{
int i;
for (i = 0;i < numpoints;i++)
VectorCopy(vertex3f + element3i[tri * 3 + 2] * 3, points[2].v);
Collision_SnapCopyPoints(brush.numpoints, points, points, COLLISION_SNAPSCALE, COLLISION_SNAP);
Collision_CalcEdgeDirsForPolygonBrushFloat(&brush);
- Collision_CalcPlanesForPolygonBrushFloat(&brush);
+ Collision_CalcPlanesForTriangleBrushFloat(&brush);
//Collision_PrintBrushAsQHull(&brush, "brush");
Collision_TraceBrushBrushFloat(trace, thisbrush_start, thisbrush_end, &brush, &brush);
}
{
for (i = 0;i < numtriangles;i++, element3i += 3)
{
- if (TriangleOverlapsBox(vertex3f + element3i[0]*3, vertex3f + element3i[1]*3, vertex3f + element3i[2]*3, segmentmins, segmentmaxs))
+ if (TriangleBBoxOverlapsBox(vertex3f + element3i[0]*3, vertex3f + element3i[1]*3, vertex3f + element3i[2]*3, segmentmins, segmentmaxs))
{
VectorCopy(vertex3f + element3i[0] * 3, points[0].v);
VectorCopy(vertex3f + element3i[1] * 3, points[1].v);
VectorCopy(vertex3f + element3i[2] * 3, points[2].v);
Collision_SnapCopyPoints(brush.numpoints, points, points, COLLISION_SNAPSCALE, COLLISION_SNAP);
Collision_CalcEdgeDirsForPolygonBrushFloat(&brush);
- Collision_CalcPlanesForPolygonBrushFloat(&brush);
+ Collision_CalcPlanesForTriangleBrushFloat(&brush);
//Collision_PrintBrushAsQHull(&brush, "brush");
Collision_TraceBrushBrushFloat(trace, thisbrush_start, thisbrush_end, &brush, &brush);
}
VectorCopy(vertex3f + element3i[2] * 3, points[2].v);
Collision_SnapCopyPoints(brush.numpoints, points, points, COLLISION_SNAPSCALE, COLLISION_SNAP);
Collision_CalcEdgeDirsForPolygonBrushFloat(&brush);
- Collision_CalcPlanesForPolygonBrushFloat(&brush);
+ Collision_CalcPlanesForTriangleBrushFloat(&brush);
//Collision_PrintBrushAsQHull(&brush, "brush");
Collision_TraceBrushBrushFloat(trace, thisbrush_start, thisbrush_end, &brush, &brush);
}
VectorCopy(v2, points[2].v);
Collision_SnapCopyPoints(brush.numpoints, points, points, COLLISION_SNAPSCALE, COLLISION_SNAP);
Collision_CalcEdgeDirsForPolygonBrushFloat(&brush);
- Collision_CalcPlanesForPolygonBrushFloat(&brush);
+ Collision_CalcPlanesForTriangleBrushFloat(&brush);
//Collision_PrintBrushAsQHull(&brush, "brush");
Collision_TraceBrushBrushFloat(trace, thisbrush_start, thisbrush_end, &brush, &brush);
}
//Collision_ValidateBrush(&boxbrush->brush);
}
-void Collision_ClipTrace_BrushBox(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 supercontents, int q3surfaceflags, texture_t *texture)
-{
- colboxbrushf_t boxbrush, thisbrush_start, thisbrush_end;
- vec3_t startmins, startmaxs, endmins, endmaxs;
-
- // create brushes for the collision
- VectorAdd(start, mins, startmins);
- VectorAdd(start, maxs, startmaxs);
- VectorAdd(end, mins, endmins);
- VectorAdd(end, maxs, endmaxs);
- Collision_BrushForBox(&boxbrush, cmins, cmaxs, supercontents, q3surfaceflags, texture);
- Collision_BrushForBox(&thisbrush_start, startmins, startmaxs, 0, 0, NULL);
- Collision_BrushForBox(&thisbrush_end, endmins, endmaxs, 0, 0, NULL);
-
- memset(trace, 0, sizeof(trace_t));
- trace->hitsupercontentsmask = hitsupercontentsmask;
- trace->fraction = 1;
- trace->realfraction = 1;
- trace->allsolid = true;
- Collision_TraceBrushBrushFloat(trace, &thisbrush_start.brush, &thisbrush_end.brush, &boxbrush.brush, &boxbrush.brush);
-}
-
//pseudocode for detecting line/sphere overlap without calculating an impact point
//linesphereorigin = sphereorigin - linestart;linediff = lineend - linestart;linespherefrac = DotProduct(linesphereorigin, linediff) / DotProduct(linediff, linediff);return VectorLength2(linesphereorigin - bound(0, linespherefrac, 1) * linediff) >= sphereradius*sphereradius;
// all the results are correct (impactpoint, impactnormal, and fraction)
float Collision_ClipTrace_Line_Sphere(double *linestart, double *lineend, double *sphereorigin, double sphereradius, double *impactpoint, double *impactnormal)
{
- double dir[3], scale, v[3], deviationdist, impactdist, linelength;
+ double dir[3], scale, v[3], deviationdist2, impactdist, linelength;
// make sure the impactpoint and impactnormal are valid even if there is
// no collision
VectorCopy(lineend, impactpoint);
// of the line from the sphereorigin (deviation, how off-center it is)
VectorMA(linestart, impactdist, dir, v);
VectorSubtract(v, sphereorigin, v);
- deviationdist = VectorLength2(v);
- // if outside the radius, it's a miss for sure
- // (we do this comparison using squared radius to avoid a sqrt)
- if (deviationdist > sphereradius*sphereradius)
+ deviationdist2 = sphereradius * sphereradius - VectorLength2(v);
+ // if squared offset length is outside the squared sphere radius, miss
+ if (deviationdist2 < 0)
return 1; // miss (off to the side)
// nudge back to find the correct impact distance
- impactdist -= sphereradius - deviationdist/sphereradius;
+ impactdist -= sqrt(deviationdist2);
if (impactdist >= linelength)
return 1; // miss (not close enough)
if (impactdist < 0)
#endif
}
-typedef struct colbspnode_s
-{
- mplane_t plane;
- struct colbspnode_s *children[2];
- // the node is reallocated or split if max is reached
- int numcolbrushf;
- int maxcolbrushf;
- colbrushf_t **colbrushflist;
- //int numcolbrushd;
- //int maxcolbrushd;
- //colbrushd_t **colbrushdlist;
-}
-colbspnode_t;
-
-typedef struct colbsp_s
-{
- mempool_t *mempool;
- colbspnode_t *nodes;
-}
-colbsp_t;
-
-colbsp_t *Collision_CreateCollisionBSP(mempool_t *mempool)
-{
- colbsp_t *bsp;
- bsp = (colbsp_t *)Mem_Alloc(mempool, sizeof(colbsp_t));
- bsp->mempool = mempool;
- bsp->nodes = (colbspnode_t *)Mem_Alloc(bsp->mempool, sizeof(colbspnode_t));
- return bsp;
-}
-
-void Collision_FreeCollisionBSPNode(colbspnode_t *node)
-{
- if (node->children[0])
- Collision_FreeCollisionBSPNode(node->children[0]);
- if (node->children[1])
- Collision_FreeCollisionBSPNode(node->children[1]);
- while (--node->numcolbrushf)
- Mem_Free(node->colbrushflist[node->numcolbrushf]);
- //while (--node->numcolbrushd)
- // Mem_Free(node->colbrushdlist[node->numcolbrushd]);
- Mem_Free(node);
-}
-
-void Collision_FreeCollisionBSP(colbsp_t *bsp)
-{
- Collision_FreeCollisionBSPNode(bsp->nodes);
- Mem_Free(bsp);
-}
-
void Collision_BoundingBoxOfBrushTraceSegment(const colbrushf_t *start, const colbrushf_t *end, vec3_t mins, vec3_t maxs, float startfrac, float endfrac)
{
int i;
//===========================================
-void Collision_TranslateBrush(const vec3_t shift, colbrushf_t *brush)
+static void Collision_TranslateBrush(const vec3_t shift, colbrushf_t *brush)
{
int i;
// now we can transform the data
VectorAdd(brush->maxs, shift, brush->maxs);
}
-void Collision_TransformBrush(const matrix4x4_t *matrix, colbrushf_t *brush)
+static void Collision_TransformBrush(const matrix4x4_t *matrix, colbrushf_t *brush)
{
int i;
vec3_t v;
Collision_Cache_Reset(true);
}
-void Collision_Cache_RebuildHash(void)
+static void Collision_Cache_RebuildHash(void)
{
int index;
int range = collision_cachedtrace_lastused + 1;
// cliptrace->inopen = true;
if (trace->inwater)
cliptrace->inwater = true;
- if ((trace->realfraction <= cliptrace->realfraction) && (VectorLength2(trace->plane.normal) > 0))
+ if ((trace->realfraction < cliptrace->realfraction) && (VectorLength2(trace->plane.normal) > 0))
{
cliptrace->fraction = trace->fraction;
cliptrace->realfraction = trace->realfraction;