5 #define COLLISION_EDGEDIR_DOT_EPSILON (0.999f)
6 #define COLLISION_EDGECROSS_MINLENGTH2 (1.0f / 4194304.0f)
7 #define COLLISION_SNAPSCALE (32.0f)
8 #define COLLISION_SNAP (1.0f / COLLISION_SNAPSCALE)
9 #define COLLISION_SNAP2 (2.0f / COLLISION_SNAPSCALE)
10 #define COLLISION_PLANE_DIST_EPSILON (2.0f / COLLISION_SNAPSCALE)
12 cvar_t collision_impactnudge = {0, "collision_impactnudge", "0.03125", "how much to back off from the impact"};
13 cvar_t collision_startnudge = {0, "collision_startnudge", "0", "how much to bias collision trace start"};
14 cvar_t collision_endnudge = {0, "collision_endnudge", "0", "how much to bias collision trace end"};
15 cvar_t collision_enternudge = {0, "collision_enternudge", "0", "how much to bias collision entry fraction"};
16 cvar_t collision_leavenudge = {0, "collision_leavenudge", "0", "how much to bias collision exit fraction"};
17 cvar_t collision_prefernudgedfraction = {0, "collision_prefernudgedfraction", "1", "whether to sort collision events by nudged fraction (1) or real fraction (0)"};
18 #ifdef COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
19 cvar_t collision_endposnudge = {0, "collision_endposnudge", "0", "workaround to fix trace_endpos sometimes being returned where it would be inside solid by making that collision hit (recommended: values like 1)"};
22 void Collision_Init (void)
24 Cvar_RegisterVariable(&collision_impactnudge);
25 Cvar_RegisterVariable(&collision_startnudge);
26 Cvar_RegisterVariable(&collision_endnudge);
27 Cvar_RegisterVariable(&collision_enternudge);
28 Cvar_RegisterVariable(&collision_leavenudge);
29 Cvar_RegisterVariable(&collision_prefernudgedfraction);
30 #ifdef COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
31 Cvar_RegisterVariable(&collision_endposnudge);
48 void Collision_PrintBrushAsQHull(colbrushf_t *brush, const char *name)
51 Con_Printf("3 %s\n%i\n", name, brush->numpoints);
52 for (i = 0;i < brush->numpoints;i++)
53 Con_Printf("%f %f %f\n", brush->points[i].v[0], brush->points[i].v[1], brush->points[i].v[2]);
55 Con_Printf("4\n%i\n", brush->numplanes);
56 for (i = 0;i < brush->numplanes;i++)
57 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);
60 void Collision_ValidateBrush(colbrushf_t *brush)
62 int j, k, pointsoffplanes, pointonplanes, pointswithinsufficientplanes, printbrush;
65 if (!brush->numpoints)
67 Con_Print("Collision_ValidateBrush: brush with no points!\n");
71 // it's ok for a brush to have one point and no planes...
72 if (brush->numplanes == 0 && brush->numpoints != 1)
74 Con_Print("Collision_ValidateBrush: brush with no planes and more than one point!\n");
81 pointswithinsufficientplanes = 0;
82 for (k = 0;k < brush->numplanes;k++)
83 if (DotProduct(brush->planes[k].normal, brush->planes[k].normal) < 0.0001f)
84 Con_Printf("Collision_ValidateBrush: plane #%i (%f %f %f %f) is degenerate\n", k, brush->planes[k].normal[0], brush->planes[k].normal[1], brush->planes[k].normal[2], brush->planes[k].dist);
85 for (j = 0;j < brush->numpoints;j++)
88 for (k = 0;k < brush->numplanes;k++)
90 d = DotProduct(brush->points[j].v, brush->planes[k].normal) - brush->planes[k].dist;
91 if (d > COLLISION_PLANE_DIST_EPSILON)
93 Con_Printf("Collision_ValidateBrush: point #%i (%f %f %f) infront of plane #%i (%f %f %f %f)\n", j, brush->points[j].v[0], brush->points[j].v[1], brush->points[j].v[2], k, brush->planes[k].normal[0], brush->planes[k].normal[1], brush->planes[k].normal[2], brush->planes[k].dist);
96 if (fabs(d) > COLLISION_PLANE_DIST_EPSILON)
101 if (pointonplanes < 3)
102 pointswithinsufficientplanes++;
104 if (pointswithinsufficientplanes)
106 Con_Print("Collision_ValidateBrush: some points have insufficient planes, every point must be on at least 3 planes to form a corner.\n");
109 if (pointsoffplanes == 0) // all points are on all planes
111 Con_Print("Collision_ValidateBrush: all points lie on all planes (degenerate, no brush volume!)\n");
116 Collision_PrintBrushAsQHull(brush, "unnamed");
119 float nearestplanedist_float(const float *normal, const colpointf_t *points, int numpoints)
121 float dist, bestdist;
124 bestdist = DotProduct(points->v, normal);
128 dist = DotProduct(points->v, normal);
129 bestdist = min(bestdist, dist);
135 float furthestplanedist_float(const float *normal, const colpointf_t *points, int numpoints)
137 float dist, bestdist;
140 bestdist = DotProduct(points->v, normal);
144 dist = DotProduct(points->v, normal);
145 bestdist = max(bestdist, dist);
151 void Collision_CalcEdgeDirsForPolygonBrushFloat(colbrushf_t *brush)
154 for (i = 0, j = brush->numpoints - 1;i < brush->numpoints;j = i, i++)
155 VectorSubtract(brush->points[i].v, brush->points[j].v, brush->edgedirs[j].v);
158 colbrushf_t *Collision_NewBrushFromPlanes(mempool_t *mempool, int numoriginalplanes, const colplanef_t *originalplanes, int supercontents, int q3surfaceflags, texture_t *texture, int hasaabbplanes)
160 // TODO: planesbuf could be replaced by a remapping table
161 int j, k, l, m, w, xyzflags;
162 int numpointsbuf = 0, maxpointsbuf = 256, numedgedirsbuf = 0, maxedgedirsbuf = 256, numplanesbuf = 0, maxplanesbuf = 256, numelementsbuf = 0, maxelementsbuf = 256;
166 colpointf_t pointsbuf[256];
167 colpointf_t edgedirsbuf[256];
168 colplanef_t planesbuf[256];
169 int elementsbuf[1024];
170 int polypointbuf[256];
175 // enable these if debugging to avoid seeing garbage in unused data-
176 memset(pointsbuf, 0, sizeof(pointsbuf));
177 memset(edgedirsbuf, 0, sizeof(edgedirsbuf));
178 memset(planesbuf, 0, sizeof(planesbuf));
179 memset(elementsbuf, 0, sizeof(elementsbuf));
180 memset(polypointbuf, 0, sizeof(polypointbuf));
181 memset(p, 0, sizeof(p));
184 // check if there are too many planes and skip the brush
185 if (numoriginalplanes >= maxplanesbuf)
187 Con_DPrint("Collision_NewBrushFromPlanes: failed to build collision brush: too many planes for buffer\n");
191 // figure out how large a bounding box we need to properly compute this brush
193 for (j = 0;j < numoriginalplanes;j++)
194 maxdist = max(maxdist, fabs(originalplanes[j].dist));
195 // now make it large enough to enclose the entire brush, and round it off to a reasonable multiple of 1024
196 maxdist = floor(maxdist * (4.0 / 1024.0) + 2) * 1024.0;
197 // construct a collision brush (points, planes, and renderable mesh) from
198 // a set of planes, this also optimizes out any unnecessary planes (ones
199 // whose polygon is clipped away by the other planes)
200 for (j = 0;j < numoriginalplanes;j++)
203 VectorCopy(originalplanes[j].normal, planesbuf[numplanesbuf].normal);
204 planesbuf[numplanesbuf].dist = originalplanes[j].dist;
205 planesbuf[numplanesbuf].q3surfaceflags = originalplanes[j].q3surfaceflags;
206 planesbuf[numplanesbuf].texture = originalplanes[j].texture;
209 // create a large polygon from the plane
211 PolygonD_QuadForPlane(p[w], originalplanes[j].normal[0], originalplanes[j].normal[1], originalplanes[j].normal[2], originalplanes[j].dist, maxdist);
213 // clip it by all other planes
214 for (k = 0;k < numoriginalplanes && pnumpoints >= 3 && pnumpoints <= pmaxpoints;k++)
216 // skip the plane this polygon
217 // (nothing happens if it is processed, this is just an optimization)
220 // we want to keep the inside of the brush plane so we flip
222 PolygonD_Divide(pnumpoints, p[w], -originalplanes[k].normal[0], -originalplanes[k].normal[1], -originalplanes[k].normal[2], -originalplanes[k].dist, COLLISION_PLANE_DIST_EPSILON, pmaxpoints, p[!w], &pnumpoints, 0, NULL, NULL, NULL);
227 // if nothing is left, skip it
230 //Con_DPrintf("Collision_NewBrushFromPlanes: warning: polygon for plane %f %f %f %f clipped away\n", originalplanes[j].normal[0], originalplanes[j].normal[1], originalplanes[j].normal[2], originalplanes[j].dist);
234 for (k = 0;k < pnumpoints;k++)
238 for (l = 0;l < numoriginalplanes;l++)
239 if (fabs(DotProduct(&p[w][k*3], originalplanes[l].normal) - originalplanes[l].dist) < COLLISION_PLANE_DIST_EPSILON)
246 Con_DPrintf("Collision_NewBrushFromPlanes: warning: polygon point does not lie on at least 3 planes\n");
250 // check if there are too many polygon vertices for buffer
251 if (pnumpoints > pmaxpoints)
253 Con_DPrint("Collision_NewBrushFromPlanes: failed to build collision brush: too many points for buffer\n");
257 // check if there are too many triangle elements for buffer
258 if (numelementsbuf + (pnumpoints - 2) * 3 > maxelementsbuf)
260 Con_DPrint("Collision_NewBrushFromPlanes: failed to build collision brush: too many triangle elements for buffer\n");
264 // add the unique points for this polygon
265 for (k = 0;k < pnumpoints;k++)
268 // downgrade to float precision before comparing
269 VectorCopy(&p[w][k*3], v);
271 // check if there is already a matching point (no duplicates)
272 for (m = 0;m < numpointsbuf;m++)
273 if (VectorDistance2(v, pointsbuf[m].v) < COLLISION_SNAP2)
276 // if there is no match, add a new one
277 if (m == numpointsbuf)
279 // check if there are too many and skip the brush
280 if (numpointsbuf >= maxpointsbuf)
282 Con_DPrint("Collision_NewBrushFromPlanes: failed to build collision brush: too many points for buffer\n");
286 VectorCopy(&p[w][k*3], pointsbuf[numpointsbuf].v);
290 // store the index into a buffer
294 // add the triangles for the polygon
295 // (this particular code makes a triangle fan)
296 for (k = 0;k < pnumpoints - 2;k++)
298 elementsbuf[numelementsbuf++] = polypointbuf[0];
299 elementsbuf[numelementsbuf++] = polypointbuf[k + 1];
300 elementsbuf[numelementsbuf++] = polypointbuf[k + 2];
303 // add the unique edgedirs for this polygon
304 for (k = 0, l = pnumpoints-1;k < pnumpoints;l = k, k++)
307 // downgrade to float precision before comparing
308 VectorSubtract(&p[w][k*3], &p[w][l*3], dir);
309 VectorNormalize(dir);
311 // check if there is already a matching edgedir (no duplicates)
312 for (m = 0;m < numedgedirsbuf;m++)
313 if (DotProduct(dir, edgedirsbuf[m].v) >= COLLISION_EDGEDIR_DOT_EPSILON)
315 // skip this if there is
316 if (m < numedgedirsbuf)
319 // try again with negated edgedir
320 VectorNegate(dir, dir);
321 // check if there is already a matching edgedir (no duplicates)
322 for (m = 0;m < numedgedirsbuf;m++)
323 if (DotProduct(dir, edgedirsbuf[m].v) >= COLLISION_EDGEDIR_DOT_EPSILON)
325 // if there is no match, add a new one
326 if (m == numedgedirsbuf)
328 // check if there are too many and skip the brush
329 if (numedgedirsbuf >= maxedgedirsbuf)
331 Con_DPrint("Collision_NewBrushFromPlanes: failed to build collision brush: too many edgedirs for buffer\n");
335 VectorCopy(dir, edgedirsbuf[numedgedirsbuf].v);
340 // if any normal is not purely axial, it's not an axis-aligned box
341 if (isaabb && (originalplanes[j].normal[0] == 0) + (originalplanes[j].normal[1] == 0) + (originalplanes[j].normal[2] == 0) < 2)
345 // if nothing is left, there's nothing to allocate
346 if (numplanesbuf < 4)
348 Con_DPrintf("Collision_NewBrushFromPlanes: failed to build collision brush: %i triangles, %i planes (input was %i planes), %i vertices\n", numelementsbuf / 3, numplanesbuf, numoriginalplanes, numpointsbuf);
352 // if no triangles or points could be constructed, then this routine failed but the brush is not discarded
353 if (numelementsbuf < 12 || numpointsbuf < 4)
354 Con_DPrintf("Collision_NewBrushFromPlanes: unable to rebuild triangles/points for collision brush: %i triangles, %i planes (input was %i planes), %i vertices\n", numelementsbuf / 3, numplanesbuf, numoriginalplanes, numpointsbuf);
356 // validate plane distances
357 for (j = 0;j < numplanesbuf;j++)
359 float d = furthestplanedist_float(planesbuf[j].normal, pointsbuf, numpointsbuf);
360 if (fabs(planesbuf[j].dist - d) > COLLISION_PLANE_DIST_EPSILON)
361 Con_DPrintf("plane %f %f %f %f mismatches dist %f\n", planesbuf[j].normal[0], planesbuf[j].normal[1], planesbuf[j].normal[2], planesbuf[j].dist, d);
364 // allocate the brush and copy to it
365 brush = (colbrushf_t *)Mem_Alloc(mempool, sizeof(colbrushf_t) + sizeof(colpointf_t) * numpointsbuf + sizeof(colpointf_t) * numedgedirsbuf + sizeof(colplanef_t) * numplanesbuf + sizeof(int) * numelementsbuf);
366 brush->isaabb = isaabb;
367 brush->hasaabbplanes = hasaabbplanes;
368 brush->supercontents = supercontents;
369 brush->numplanes = numplanesbuf;
370 brush->numedgedirs = numedgedirsbuf;
371 brush->numpoints = numpointsbuf;
372 brush->numtriangles = numelementsbuf / 3;
373 brush->planes = (colplanef_t *)(brush + 1);
374 brush->points = (colpointf_t *)(brush->planes + brush->numplanes);
375 brush->edgedirs = (colpointf_t *)(brush->points + brush->numpoints);
376 brush->elements = (int *)(brush->points + brush->numpoints);
377 brush->q3surfaceflags = q3surfaceflags;
378 brush->texture = texture;
379 for (j = 0;j < brush->numpoints;j++)
381 brush->points[j].v[0] = pointsbuf[j].v[0];
382 brush->points[j].v[1] = pointsbuf[j].v[1];
383 brush->points[j].v[2] = pointsbuf[j].v[2];
385 for (j = 0;j < brush->numedgedirs;j++)
387 brush->edgedirs[j].v[0] = edgedirsbuf[j].v[0];
388 brush->edgedirs[j].v[1] = edgedirsbuf[j].v[1];
389 brush->edgedirs[j].v[2] = edgedirsbuf[j].v[2];
391 for (j = 0;j < brush->numplanes;j++)
393 brush->planes[j].normal[0] = planesbuf[j].normal[0];
394 brush->planes[j].normal[1] = planesbuf[j].normal[1];
395 brush->planes[j].normal[2] = planesbuf[j].normal[2];
396 brush->planes[j].dist = planesbuf[j].dist;
397 brush->planes[j].q3surfaceflags = planesbuf[j].q3surfaceflags;
398 brush->planes[j].texture = planesbuf[j].texture;
400 for (j = 0;j < brush->numtriangles * 3;j++)
401 brush->elements[j] = elementsbuf[j];
404 VectorClear(brush->mins);
405 VectorClear(brush->maxs);
406 for (j = 0;j < min(6, numoriginalplanes);j++)
408 if (originalplanes[j].normal[0] == 1) {xyzflags |= 1;brush->maxs[0] = originalplanes[j].dist;}
409 else if (originalplanes[j].normal[0] == -1) {xyzflags |= 2;brush->mins[0] = -originalplanes[j].dist;}
410 else if (originalplanes[j].normal[1] == 1) {xyzflags |= 4;brush->maxs[1] = originalplanes[j].dist;}
411 else if (originalplanes[j].normal[1] == -1) {xyzflags |= 8;brush->mins[1] = -originalplanes[j].dist;}
412 else if (originalplanes[j].normal[2] == 1) {xyzflags |= 16;brush->maxs[2] = originalplanes[j].dist;}
413 else if (originalplanes[j].normal[2] == -1) {xyzflags |= 32;brush->mins[2] = -originalplanes[j].dist;}
415 // if not all xyzflags were set, then this is not a brush from q3map/q3map2, and needs reconstruction of the bounding box
416 // (this case works for any brush with valid points, but sometimes brushes are not reconstructed properly and hence the points are not valid, so this is reserved as a fallback case)
419 VectorCopy(brush->points[0].v, brush->mins);
420 VectorCopy(brush->points[0].v, brush->maxs);
421 for (j = 1;j < brush->numpoints;j++)
423 brush->mins[0] = min(brush->mins[0], brush->points[j].v[0]);
424 brush->mins[1] = min(brush->mins[1], brush->points[j].v[1]);
425 brush->mins[2] = min(brush->mins[2], brush->points[j].v[2]);
426 brush->maxs[0] = max(brush->maxs[0], brush->points[j].v[0]);
427 brush->maxs[1] = max(brush->maxs[1], brush->points[j].v[1]);
428 brush->maxs[2] = max(brush->maxs[2], brush->points[j].v[2]);
437 Collision_ValidateBrush(brush);
443 void Collision_CalcPlanesForPolygonBrushFloat(colbrushf_t *brush)
446 float edge0[3], edge1[3], edge2[3], normal[3], dist, bestdist;
449 // FIXME: these probably don't actually need to be normalized if the collision code does not care
450 if (brush->numpoints == 3)
452 // optimized triangle case
453 TriangleNormal(brush->points[0].v, brush->points[1].v, brush->points[2].v, brush->planes[0].normal);
454 if (DotProduct(brush->planes[0].normal, brush->planes[0].normal) < 0.0001f)
456 // there's no point in processing a degenerate triangle (GIGO - Garbage In, Garbage Out)
457 brush->numplanes = 0;
462 brush->numplanes = 5;
463 brush->numedgedirs = 3;
464 VectorNormalize(brush->planes[0].normal);
465 brush->planes[0].dist = DotProduct(brush->points->v, brush->planes[0].normal);
466 VectorNegate(brush->planes[0].normal, brush->planes[1].normal);
467 brush->planes[1].dist = -brush->planes[0].dist;
468 VectorSubtract(brush->points[2].v, brush->points[0].v, edge0);
469 VectorSubtract(brush->points[0].v, brush->points[1].v, edge1);
470 VectorSubtract(brush->points[1].v, brush->points[2].v, edge2);
471 VectorCopy(edge0, brush->edgedirs[0].v);
472 VectorCopy(edge1, brush->edgedirs[1].v);
473 VectorCopy(edge2, brush->edgedirs[2].v);
476 float projectionnormal[3], projectionedge0[3], projectionedge1[3], projectionedge2[3];
478 float dist, bestdist;
479 bestdist = fabs(brush->planes[0].normal[0]);
481 for (i = 1;i < 3;i++)
483 dist = fabs(brush->planes[0].normal[i]);
490 VectorClear(projectionnormal);
491 if (brush->planes[0].normal[best] < 0)
492 projectionnormal[best] = -1;
494 projectionnormal[best] = 1;
495 VectorCopy(edge0, projectionedge0);
496 VectorCopy(edge1, projectionedge1);
497 VectorCopy(edge2, projectionedge2);
498 projectionedge0[best] = 0;
499 projectionedge1[best] = 0;
500 projectionedge2[best] = 0;
501 CrossProduct(projectionedge0, projectionnormal, brush->planes[2].normal);
502 CrossProduct(projectionedge1, projectionnormal, brush->planes[3].normal);
503 CrossProduct(projectionedge2, projectionnormal, brush->planes[4].normal);
506 CrossProduct(edge0, brush->planes->normal, brush->planes[2].normal);
507 CrossProduct(edge1, brush->planes->normal, brush->planes[3].normal);
508 CrossProduct(edge2, brush->planes->normal, brush->planes[4].normal);
510 VectorNormalize(brush->planes[2].normal);
511 VectorNormalize(brush->planes[3].normal);
512 VectorNormalize(brush->planes[4].normal);
513 brush->planes[2].dist = DotProduct(brush->points[2].v, brush->planes[2].normal);
514 brush->planes[3].dist = DotProduct(brush->points[0].v, brush->planes[3].normal);
515 brush->planes[4].dist = DotProduct(brush->points[1].v, brush->planes[4].normal);
517 if (developer_extra.integer)
523 VectorSubtract(brush->points[0].v, brush->points[1].v, edge0);
524 VectorSubtract(brush->points[2].v, brush->points[1].v, edge1);
525 CrossProduct(edge0, edge1, normal);
526 VectorNormalize(normal);
527 VectorSubtract(normal, brush->planes[0].normal, temp);
528 if (VectorLength(temp) > 0.01f)
529 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]);
530 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)
531 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);
533 if (fabs(DotProduct(brush->planes[2].normal, brush->planes[0].normal)) > 0.01f)
534 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);
535 if (fabs(DotProduct(brush->planes[3].normal, brush->planes[0].normal)) > 0.01f)
536 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);
537 if (fabs(DotProduct(brush->planes[4].normal, brush->planes[0].normal)) > 0.01f)
538 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);
539 if (fabs(DotProduct(brush->planes[2].normal, edge0)) > 0.01f)
540 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]);
541 if (fabs(DotProduct(brush->planes[3].normal, edge1)) > 0.01f)
542 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]);
543 if (fabs(DotProduct(brush->planes[4].normal, edge2)) > 0.01f)
544 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]);
547 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)
548 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);
549 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)
550 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);
551 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)
552 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);
553 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)
554 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);
555 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)
556 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);
562 // choose best surface normal for polygon's plane
564 for (i = 0, p = brush->points + 1;i < brush->numpoints - 2;i++, p++)
566 VectorSubtract(p[-1].v, p[0].v, edge0);
567 VectorSubtract(p[1].v, p[0].v, edge1);
568 CrossProduct(edge0, edge1, normal);
569 //TriangleNormal(p[-1].v, p[0].v, p[1].v, normal);
570 dist = DotProduct(normal, normal);
571 if (i == 0 || bestdist < dist)
574 VectorCopy(normal, brush->planes->normal);
577 if (bestdist < 0.0001f)
579 // there's no point in processing a degenerate triangle (GIGO - Garbage In, Garbage Out)
580 brush->numplanes = 0;
585 brush->numplanes = brush->numpoints + 2;
586 VectorNormalize(brush->planes->normal);
587 brush->planes->dist = DotProduct(brush->points->v, brush->planes->normal);
589 // negate plane to create other side
590 VectorNegate(brush->planes[0].normal, brush->planes[1].normal);
591 brush->planes[1].dist = -brush->planes[0].dist;
592 for (i = 0, p = brush->points + (brush->numpoints - 1), p2 = brush->points;i < brush->numpoints;i++, p = p2, p2++)
594 VectorSubtract(p->v, p2->v, edge0);
595 CrossProduct(edge0, brush->planes->normal, brush->planes[i + 2].normal);
596 VectorNormalize(brush->planes[i + 2].normal);
597 brush->planes[i + 2].dist = DotProduct(p->v, brush->planes[i + 2].normal);
602 if (developer_extra.integer)
604 // validity check - will be disabled later
605 Collision_ValidateBrush(brush);
606 for (i = 0;i < brush->numplanes;i++)
609 for (j = 0, p = brush->points;j < brush->numpoints;j++, p++)
610 if (DotProduct(p->v, brush->planes[i].normal) > brush->planes[i].dist + COLLISION_PLANE_DIST_EPSILON)
611 Con_DPrintf("Error in brush plane generation, plane %i\n", i);
616 colbrushf_t *Collision_AllocBrushFromPermanentPolygonFloat(mempool_t *mempool, int numpoints, float *points, int supercontents, int q3surfaceflags, texture_t *texture)
619 brush = (colbrushf_t *)Mem_Alloc(mempool, sizeof(colbrushf_t) + sizeof(colplanef_t) * (numpoints + 2) + sizeof(colpointf_t) * numpoints);
620 brush->isaabb = false;
621 brush->hasaabbplanes = false;
622 brush->supercontents = supercontents;
623 brush->numpoints = numpoints;
624 brush->numedgedirs = numpoints;
625 brush->numplanes = numpoints + 2;
626 brush->planes = (colplanef_t *)(brush + 1);
627 brush->points = (colpointf_t *)points;
628 brush->edgedirs = (colpointf_t *)(brush->planes + brush->numplanes);
629 brush->q3surfaceflags = q3surfaceflags;
630 brush->texture = texture;
631 Sys_Error("Collision_AllocBrushFromPermanentPolygonFloat: FIXME: this code needs to be updated to generate a mesh...");
635 // NOTE: start and end of each brush pair must have same numplanes/numpoints
636 void Collision_TraceBrushBrushFloat(trace_t *trace, const colbrushf_t *trace_start, const colbrushf_t *trace_end, const colbrushf_t *other_start, const colbrushf_t *other_end)
638 int nplane, nplane2, nedge1, nedge2, hitq3surfaceflags = 0;
639 int tracenumedgedirs = trace_start->numedgedirs;
640 //int othernumedgedirs = other_start->numedgedirs;
641 int tracenumpoints = trace_start->numpoints;
642 int othernumpoints = other_start->numpoints;
643 int numplanes1 = other_start->numplanes;
644 int numplanes2 = numplanes1 + trace_start->numplanes;
645 int numplanes3 = numplanes2 + trace_start->numedgedirs * other_start->numedgedirs * 2;
646 vec_t enterfrac = -1, leavefrac = 1, startdist, enddist, ie, f, imove, enterfrac2 = -1;
649 vec4_t newimpactplane;
650 texture_t *hittexture = NULL;
651 vec_t startdepth = 1;
652 vec3_t startdepthnormal;
654 VectorClear(startdepthnormal);
655 Vector4Clear(newimpactplane);
657 // fast case for AABB vs compiled brushes (which begin with AABB planes and also have precomputed bevels for AABB collisions)
658 if (trace_start->isaabb && other_start->hasaabbplanes)
659 numplanes3 = numplanes2 = numplanes1;
661 // Separating Axis Theorem:
662 // if a supporting vector (plane normal) can be found that separates two
663 // objects, they are not colliding.
666 // reduce the size of one object to a point while enlarging the other to
667 // represent the space that point can not occupy.
669 // try every plane we can construct between the two brushes and measure
670 // the distance between them.
671 for (nplane = 0;nplane < numplanes3;nplane++)
673 if (nplane < numplanes1)
676 VectorCopy(other_start->planes[nplane2].normal, startplane);
677 VectorCopy(other_end->planes[nplane2].normal, endplane);
679 else if (nplane < numplanes2)
681 nplane2 = nplane - numplanes1;
682 VectorCopy(trace_start->planes[nplane2].normal, startplane);
683 VectorCopy(trace_end->planes[nplane2].normal, endplane);
687 // pick an edgedir from each brush and cross them
688 nplane2 = nplane - numplanes2;
689 nedge1 = nplane2 >> 1;
690 nedge2 = nedge1 / tracenumedgedirs;
691 nedge1 -= nedge2 * tracenumedgedirs;
694 CrossProduct(trace_start->edgedirs[nedge1].v, other_start->edgedirs[nedge2].v, startplane);
695 if (VectorLength2(startplane) < COLLISION_EDGECROSS_MINLENGTH2)
696 continue; // degenerate crossproduct
697 CrossProduct(trace_end->edgedirs[nedge1].v, other_end->edgedirs[nedge2].v, endplane);
698 if (VectorLength2(endplane) < COLLISION_EDGECROSS_MINLENGTH2)
699 continue; // degenerate crossproduct
703 CrossProduct(other_start->edgedirs[nedge2].v, trace_start->edgedirs[nedge1].v, startplane);
704 if (VectorLength2(startplane) < COLLISION_EDGECROSS_MINLENGTH2)
705 continue; // degenerate crossproduct
706 CrossProduct(other_end->edgedirs[nedge2].v, trace_end->edgedirs[nedge1].v, endplane);
707 if (VectorLength2(endplane) < COLLISION_EDGECROSS_MINLENGTH2)
708 continue; // degenerate crossproduct
710 VectorNormalize(startplane);
711 VectorNormalize(endplane);
713 startplane[3] = furthestplanedist_float(startplane, other_start->points, othernumpoints);
714 endplane[3] = furthestplanedist_float(startplane, other_end->points, othernumpoints);
715 startdist = nearestplanedist_float(startplane, trace_start->points, tracenumpoints) - startplane[3] - collision_startnudge.value;
716 enddist = nearestplanedist_float(endplane, trace_end->points, tracenumpoints) - endplane[3] - collision_endnudge.value;
717 //Con_Printf("%c%i: startdist = %f, enddist = %f, startdist / (startdist - enddist) = %f\n", nplane2 != nplane ? 'b' : 'a', nplane2, startdist, enddist, startdist / (startdist - enddist));
719 // aside from collisions, this is also used for error correction
720 if (startdist < 0 && (startdepth < startdist || startdepth == 1))
722 startdepth = startdist;
723 VectorCopy(startplane, startdepthnormal);
726 if (startdist > enddist)
729 if (enddist >= collision_enternudge.value)
734 imove = 1 / (startdist - enddist);
735 f = (startdist - collision_enternudge.value) * imove;
738 // check if this will reduce the collision time range
741 // reduced collision time range
743 // if the collision time range is now empty, no collision
744 if (enterfrac > leavefrac)
746 // if the collision would be further away than the trace's
747 // existing collision data, we don't care about this
749 if (enterfrac > trace->realfraction)
751 // calculate the nudged fraction and impact normal we'll
752 // need if we accept this collision later
753 enterfrac2 = (startdist - collision_impactnudge.value) * imove;
754 ie = 1.0f - enterfrac;
755 newimpactplane[0] = startplane[0] * ie + endplane[0] * enterfrac;
756 newimpactplane[1] = startplane[1] * ie + endplane[1] * enterfrac;
757 newimpactplane[2] = startplane[2] * ie + endplane[2] * enterfrac;
758 newimpactplane[3] = startplane[3] * ie + endplane[3] * enterfrac;
759 if (nplane < numplanes1)
761 // use the plane from other
763 hitq3surfaceflags = other_start->planes[nplane2].q3surfaceflags;
764 hittexture = other_start->planes[nplane2].texture;
766 else if (nplane < numplanes2)
768 // use the plane from trace
769 nplane2 = nplane - numplanes1;
770 hitq3surfaceflags = trace_start->planes[nplane2].q3surfaceflags;
771 hittexture = trace_start->planes[nplane2].texture;
775 hitq3surfaceflags = other_start->q3surfaceflags;
776 hittexture = other_start->texture;
783 // moving out of brush
789 f = (startdist + collision_leavenudge.value) / (startdist - enddist);
792 // check if this will reduce the collision time range
795 // reduced collision time range
797 // if the collision time range is now empty, no collision
798 if (enterfrac > leavefrac)
805 // at this point we know the trace overlaps the brush because it was not
806 // rejected at any point in the loop above
808 // see if the trace started outside the brush or not
811 // started outside, and overlaps, therefore there is a collision here
812 // store out the impact information
813 if (trace->hitsupercontentsmask & other_start->supercontents)
815 trace->hitsupercontents = other_start->supercontents;
816 trace->hitq3surfaceflags = hitq3surfaceflags;
817 trace->hittexture = hittexture;
818 trace->realfraction = bound(0, enterfrac, 1);
819 trace->fraction = bound(0, enterfrac2, 1);
820 if (collision_prefernudgedfraction.integer)
821 trace->realfraction = trace->fraction;
822 VectorCopy(newimpactplane, trace->plane.normal);
823 trace->plane.dist = newimpactplane[3];
828 // started inside, update startsolid and friends
829 trace->startsupercontents |= other_start->supercontents;
830 if (trace->hitsupercontentsmask & other_start->supercontents)
832 trace->startsolid = true;
834 trace->allsolid = true;
835 VectorCopy(newimpactplane, trace->plane.normal);
836 trace->plane.dist = newimpactplane[3];
837 if (trace->startdepth > startdepth)
839 trace->startdepth = startdepth;
840 VectorCopy(startdepthnormal, trace->startdepthnormal);
846 // NOTE: start and end of each brush pair must have same numplanes/numpoints
847 void Collision_TraceLineBrushFloat(trace_t *trace, const vec3_t linestart, const vec3_t lineend, const colbrushf_t *other_start, const colbrushf_t *other_end)
849 int nplane, hitq3surfaceflags = 0;
850 int numplanes = other_start->numplanes;
851 vec_t enterfrac = -1, leavefrac = 1, startdist, enddist, ie, f, imove, enterfrac2 = -1;
854 vec4_t newimpactplane;
855 texture_t *hittexture = NULL;
856 vec_t startdepth = 1;
857 vec3_t startdepthnormal;
859 VectorClear(startdepthnormal);
860 Vector4Clear(newimpactplane);
862 // Separating Axis Theorem:
863 // if a supporting vector (plane normal) can be found that separates two
864 // objects, they are not colliding.
867 // reduce the size of one object to a point while enlarging the other to
868 // represent the space that point can not occupy.
870 // try every plane we can construct between the two brushes and measure
871 // the distance between them.
872 for (nplane = 0;nplane < numplanes;nplane++)
874 VectorCopy(other_start->planes[nplane].normal, startplane);
875 startplane[3] = other_start->planes[nplane].dist;
876 VectorCopy(other_end->planes[nplane].normal, endplane);
877 endplane[3] = other_end->planes[nplane].dist;
878 startdist = DotProduct(linestart, startplane) - startplane[3] - collision_startnudge.value;
879 enddist = DotProduct(lineend, endplane) - endplane[3] - collision_endnudge.value;
880 //Con_Printf("%c%i: startdist = %f, enddist = %f, startdist / (startdist - enddist) = %f\n", nplane2 != nplane ? 'b' : 'a', nplane2, startdist, enddist, startdist / (startdist - enddist));
882 // aside from collisions, this is also used for error correction
883 if (startdist < 0 && (startdepth < startdist || startdepth == 1))
885 startdepth = startdist;
886 VectorCopy(startplane, startdepthnormal);
889 if (startdist > enddist)
892 if (enddist >= collision_enternudge.value)
897 imove = 1 / (startdist - enddist);
898 f = (startdist - collision_enternudge.value) * imove;
901 // check if this will reduce the collision time range
904 // reduced collision time range
906 // if the collision time range is now empty, no collision
907 if (enterfrac > leavefrac)
909 // if the collision would be further away than the trace's
910 // existing collision data, we don't care about this
912 if (enterfrac > trace->realfraction)
914 // calculate the nudged fraction and impact normal we'll
915 // need if we accept this collision later
916 enterfrac2 = (startdist - collision_impactnudge.value) * imove;
917 ie = 1.0f - enterfrac;
918 newimpactplane[0] = startplane[0] * ie + endplane[0] * enterfrac;
919 newimpactplane[1] = startplane[1] * ie + endplane[1] * enterfrac;
920 newimpactplane[2] = startplane[2] * ie + endplane[2] * enterfrac;
921 newimpactplane[3] = startplane[3] * ie + endplane[3] * enterfrac;
922 hitq3surfaceflags = other_start->planes[nplane].q3surfaceflags;
923 hittexture = other_start->planes[nplane].texture;
929 // moving out of brush
935 f = (startdist + collision_leavenudge.value) / (startdist - enddist);
938 // check if this will reduce the collision time range
941 // reduced collision time range
943 // if the collision time range is now empty, no collision
944 if (enterfrac > leavefrac)
951 // at this point we know the trace overlaps the brush because it was not
952 // rejected at any point in the loop above
954 // see if the trace started outside the brush or not
957 // started outside, and overlaps, therefore there is a collision here
958 // store out the impact information
959 if (trace->hitsupercontentsmask & other_start->supercontents)
961 trace->hitsupercontents = other_start->supercontents;
962 trace->hitq3surfaceflags = hitq3surfaceflags;
963 trace->hittexture = hittexture;
964 trace->realfraction = bound(0, enterfrac, 1);
965 trace->fraction = bound(0, enterfrac2, 1);
966 if (collision_prefernudgedfraction.integer)
967 trace->realfraction = trace->fraction;
968 VectorCopy(newimpactplane, trace->plane.normal);
969 trace->plane.dist = newimpactplane[3];
974 // started inside, update startsolid and friends
975 trace->startsupercontents |= other_start->supercontents;
976 if (trace->hitsupercontentsmask & other_start->supercontents)
978 trace->startsolid = true;
980 trace->allsolid = true;
981 VectorCopy(newimpactplane, trace->plane.normal);
982 trace->plane.dist = newimpactplane[3];
983 if (trace->startdepth > startdepth)
985 trace->startdepth = startdepth;
986 VectorCopy(startdepthnormal, trace->startdepthnormal);
992 qboolean Collision_PointInsideBrushFloat(const vec3_t point, const colbrushf_t *brush)
995 const colplanef_t *plane;
997 if (!BoxesOverlap(point, point, brush->mins, brush->maxs))
999 for (nplane = 0, plane = brush->planes;nplane < brush->numplanes;nplane++, plane++)
1000 if (DotProduct(plane->normal, point) > plane->dist)
1005 void Collision_TracePointBrushFloat(trace_t *trace, const vec3_t point, const colbrushf_t *thatbrush)
1007 if (!Collision_PointInsideBrushFloat(point, thatbrush))
1010 trace->startsupercontents |= thatbrush->supercontents;
1011 if (trace->hitsupercontentsmask & thatbrush->supercontents)
1013 trace->startsolid = true;
1014 trace->allsolid = true;
1018 void Collision_SnapCopyPoints(int numpoints, const colpointf_t *in, colpointf_t *out, float fractionprecision, float invfractionprecision)
1021 for (i = 0;i < numpoints;i++)
1023 out[i].v[0] = floor(in[i].v[0] * fractionprecision + 0.5f) * invfractionprecision;
1024 out[i].v[1] = floor(in[i].v[1] * fractionprecision + 0.5f) * invfractionprecision;
1025 out[i].v[2] = floor(in[i].v[2] * fractionprecision + 0.5f) * invfractionprecision;
1029 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, texture_t *texture, const vec3_t segmentmins, const vec3_t segmentmaxs)
1032 colpointf_t points[3];
1033 colpointf_t edgedirs[3];
1034 colplanef_t planes[5];
1036 memset(&brush, 0, sizeof(brush));
1037 brush.isaabb = false;
1038 brush.hasaabbplanes = false;
1039 brush.numpoints = 3;
1040 brush.numedgedirs = 3;
1041 brush.numplanes = 5;
1042 brush.points = points;
1043 brush.edgedirs = edgedirs;
1044 brush.planes = planes;
1045 brush.supercontents = supercontents;
1046 brush.q3surfaceflags = q3surfaceflags;
1047 brush.texture = texture;
1048 for (i = 0;i < brush.numplanes;i++)
1050 brush.planes[i].q3surfaceflags = q3surfaceflags;
1051 brush.planes[i].texture = texture;
1056 cnt = (numtriangles + stride - 1) / stride;
1057 for(i = 0; i < cnt; ++i)
1059 if(BoxesOverlap(bbox6f + i * 6, bbox6f + i * 6 + 3, segmentmins, segmentmaxs))
1061 for(k = 0; k < stride; ++k)
1063 tri = i * stride + k;
1064 if(tri >= numtriangles)
1066 VectorCopy(vertex3f + element3i[tri * 3 + 0] * 3, points[0].v);
1067 VectorCopy(vertex3f + element3i[tri * 3 + 1] * 3, points[1].v);
1068 VectorCopy(vertex3f + element3i[tri * 3 + 2] * 3, points[2].v);
1069 Collision_SnapCopyPoints(brush.numpoints, points, points, COLLISION_SNAPSCALE, COLLISION_SNAP);
1070 Collision_CalcEdgeDirsForPolygonBrushFloat(&brush);
1071 Collision_CalcPlanesForPolygonBrushFloat(&brush);
1072 //Collision_PrintBrushAsQHull(&brush, "brush");
1073 Collision_TraceBrushBrushFloat(trace, thisbrush_start, thisbrush_end, &brush, &brush);
1078 else if(stride == 0)
1080 for (i = 0;i < numtriangles;i++, element3i += 3)
1082 if (TriangleOverlapsBox(vertex3f + element3i[0]*3, vertex3f + element3i[1]*3, vertex3f + element3i[2]*3, segmentmins, segmentmaxs))
1084 VectorCopy(vertex3f + element3i[0] * 3, points[0].v);
1085 VectorCopy(vertex3f + element3i[1] * 3, points[1].v);
1086 VectorCopy(vertex3f + element3i[2] * 3, points[2].v);
1087 Collision_SnapCopyPoints(brush.numpoints, points, points, COLLISION_SNAPSCALE, COLLISION_SNAP);
1088 Collision_CalcEdgeDirsForPolygonBrushFloat(&brush);
1089 Collision_CalcPlanesForPolygonBrushFloat(&brush);
1090 //Collision_PrintBrushAsQHull(&brush, "brush");
1091 Collision_TraceBrushBrushFloat(trace, thisbrush_start, thisbrush_end, &brush, &brush);
1097 for (i = 0;i < numtriangles;i++, element3i += 3)
1099 VectorCopy(vertex3f + element3i[0] * 3, points[0].v);
1100 VectorCopy(vertex3f + element3i[1] * 3, points[1].v);
1101 VectorCopy(vertex3f + element3i[2] * 3, points[2].v);
1102 Collision_SnapCopyPoints(brush.numpoints, points, points, COLLISION_SNAPSCALE, COLLISION_SNAP);
1103 Collision_CalcEdgeDirsForPolygonBrushFloat(&brush);
1104 Collision_CalcPlanesForPolygonBrushFloat(&brush);
1105 //Collision_PrintBrushAsQHull(&brush, "brush");
1106 Collision_TraceBrushBrushFloat(trace, thisbrush_start, thisbrush_end, &brush, &brush);
1111 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, texture_t *texture, const vec3_t segmentmins, const vec3_t segmentmaxs)
1114 // FIXME: snap vertices?
1118 cnt = (numtriangles + stride - 1) / stride;
1119 for(i = 0; i < cnt; ++i)
1121 if(BoxesOverlap(bbox6f + i * 6, bbox6f + i * 6 + 3, segmentmins, segmentmaxs))
1123 for(k = 0; k < stride; ++k)
1125 tri = i * stride + k;
1126 if(tri >= numtriangles)
1128 Collision_TraceLineTriangleFloat(trace, linestart, lineend, vertex3f + element3i[tri * 3 + 0] * 3, vertex3f + element3i[tri * 3 + 1] * 3, vertex3f + element3i[tri * 3 + 2] * 3, supercontents, q3surfaceflags, texture);
1135 for (i = 0;i < numtriangles;i++, element3i += 3)
1136 Collision_TraceLineTriangleFloat(trace, linestart, lineend, vertex3f + element3i[0] * 3, vertex3f + element3i[1] * 3, vertex3f + element3i[2] * 3, supercontents, q3surfaceflags, texture);
1140 void Collision_BrushForBox(colboxbrushf_t *boxbrush, const vec3_t mins, const vec3_t maxs, int supercontents, int q3surfaceflags, texture_t *texture)
1143 memset(boxbrush, 0, sizeof(*boxbrush));
1144 boxbrush->brush.isaabb = true;
1145 boxbrush->brush.hasaabbplanes = true;
1146 boxbrush->brush.points = boxbrush->points;
1147 boxbrush->brush.edgedirs = boxbrush->edgedirs;
1148 boxbrush->brush.planes = boxbrush->planes;
1149 boxbrush->brush.supercontents = supercontents;
1150 boxbrush->brush.q3surfaceflags = q3surfaceflags;
1151 boxbrush->brush.texture = texture;
1152 if (VectorCompare(mins, maxs))
1155 boxbrush->brush.numpoints = 1;
1156 boxbrush->brush.numedgedirs = 0;
1157 boxbrush->brush.numplanes = 0;
1158 VectorCopy(mins, boxbrush->brush.points[0].v);
1162 boxbrush->brush.numpoints = 8;
1163 boxbrush->brush.numedgedirs = 3;
1164 boxbrush->brush.numplanes = 6;
1165 // there are 8 points on a box
1166 // there are 3 edgedirs on a box (both signs are tested in collision)
1167 // there are 6 planes on a box
1168 VectorSet(boxbrush->brush.points[0].v, mins[0], mins[1], mins[2]);
1169 VectorSet(boxbrush->brush.points[1].v, maxs[0], mins[1], mins[2]);
1170 VectorSet(boxbrush->brush.points[2].v, mins[0], maxs[1], mins[2]);
1171 VectorSet(boxbrush->brush.points[3].v, maxs[0], maxs[1], mins[2]);
1172 VectorSet(boxbrush->brush.points[4].v, mins[0], mins[1], maxs[2]);
1173 VectorSet(boxbrush->brush.points[5].v, maxs[0], mins[1], maxs[2]);
1174 VectorSet(boxbrush->brush.points[6].v, mins[0], maxs[1], maxs[2]);
1175 VectorSet(boxbrush->brush.points[7].v, maxs[0], maxs[1], maxs[2]);
1176 VectorSet(boxbrush->brush.edgedirs[0].v, 1, 0, 0);
1177 VectorSet(boxbrush->brush.edgedirs[1].v, 0, 1, 0);
1178 VectorSet(boxbrush->brush.edgedirs[2].v, 0, 0, 1);
1179 VectorSet(boxbrush->brush.planes[0].normal, -1, 0, 0);boxbrush->brush.planes[0].dist = -mins[0];
1180 VectorSet(boxbrush->brush.planes[1].normal, 1, 0, 0);boxbrush->brush.planes[1].dist = maxs[0];
1181 VectorSet(boxbrush->brush.planes[2].normal, 0, -1, 0);boxbrush->brush.planes[2].dist = -mins[1];
1182 VectorSet(boxbrush->brush.planes[3].normal, 0, 1, 0);boxbrush->brush.planes[3].dist = maxs[1];
1183 VectorSet(boxbrush->brush.planes[4].normal, 0, 0, -1);boxbrush->brush.planes[4].dist = -mins[2];
1184 VectorSet(boxbrush->brush.planes[5].normal, 0, 0, 1);boxbrush->brush.planes[5].dist = maxs[2];
1185 for (i = 0;i < 6;i++)
1187 boxbrush->brush.planes[i].q3surfaceflags = q3surfaceflags;
1188 boxbrush->brush.planes[i].texture = texture;
1191 boxbrush->brush.supercontents = supercontents;
1192 boxbrush->brush.q3surfaceflags = q3surfaceflags;
1193 boxbrush->brush.texture = texture;
1194 VectorSet(boxbrush->brush.mins, mins[0] - 1, mins[1] - 1, mins[2] - 1);
1195 VectorSet(boxbrush->brush.maxs, maxs[0] + 1, maxs[1] + 1, maxs[2] + 1);
1196 Collision_ValidateBrush(&boxbrush->brush);
1199 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)
1201 colboxbrushf_t boxbrush, thisbrush_start, thisbrush_end;
1202 vec3_t startmins, startmaxs, endmins, endmaxs;
1204 // create brushes for the collision
1205 VectorAdd(start, mins, startmins);
1206 VectorAdd(start, maxs, startmaxs);
1207 VectorAdd(end, mins, endmins);
1208 VectorAdd(end, maxs, endmaxs);
1209 Collision_BrushForBox(&boxbrush, cmins, cmaxs, supercontents, q3surfaceflags, texture);
1210 Collision_BrushForBox(&thisbrush_start, startmins, startmaxs, 0, 0, NULL);
1211 Collision_BrushForBox(&thisbrush_end, endmins, endmaxs, 0, 0, NULL);
1213 memset(trace, 0, sizeof(trace_t));
1214 trace->hitsupercontentsmask = hitsupercontentsmask;
1215 trace->fraction = 1;
1216 trace->realfraction = 1;
1217 trace->allsolid = true;
1218 Collision_TraceBrushBrushFloat(trace, &thisbrush_start.brush, &thisbrush_end.brush, &boxbrush.brush, &boxbrush.brush);
1221 //pseudocode for detecting line/sphere overlap without calculating an impact point
1222 //linesphereorigin = sphereorigin - linestart;linediff = lineend - linestart;linespherefrac = DotProduct(linesphereorigin, linediff) / DotProduct(linediff, linediff);return VectorLength2(linesphereorigin - bound(0, linespherefrac, 1) * linediff) >= sphereradius*sphereradius;
1224 // LordHavoc: currently unused, but tested
1225 // note: this can be used for tracing a moving sphere vs a stationary sphere,
1226 // by simply adding the moving sphere's radius to the sphereradius parameter,
1227 // all the results are correct (impactpoint, impactnormal, and fraction)
1228 float Collision_ClipTrace_Line_Sphere(double *linestart, double *lineend, double *sphereorigin, double sphereradius, double *impactpoint, double *impactnormal)
1230 double dir[3], scale, v[3], deviationdist, impactdist, linelength;
1231 // make sure the impactpoint and impactnormal are valid even if there is
1233 VectorCopy(lineend, impactpoint);
1234 VectorClear(impactnormal);
1235 // calculate line direction
1236 VectorSubtract(lineend, linestart, dir);
1237 // normalize direction
1238 linelength = VectorLength(dir);
1241 scale = 1.0 / linelength;
1242 VectorScale(dir, scale, dir);
1244 // this dotproduct calculates the distance along the line at which the
1245 // sphere origin is (nearest point to the sphere origin on the line)
1246 impactdist = DotProduct(sphereorigin, dir) - DotProduct(linestart, dir);
1247 // calculate point on line at that distance, and subtract the
1248 // sphereorigin from it, so we have a vector to measure for the distance
1249 // of the line from the sphereorigin (deviation, how off-center it is)
1250 VectorMA(linestart, impactdist, dir, v);
1251 VectorSubtract(v, sphereorigin, v);
1252 deviationdist = VectorLength2(v);
1253 // if outside the radius, it's a miss for sure
1254 // (we do this comparison using squared radius to avoid a sqrt)
1255 if (deviationdist > sphereradius*sphereradius)
1256 return 1; // miss (off to the side)
1257 // nudge back to find the correct impact distance
1258 impactdist -= sphereradius - deviationdist/sphereradius;
1259 if (impactdist >= linelength)
1260 return 1; // miss (not close enough)
1262 return 1; // miss (linestart is past or inside sphere)
1263 // calculate new impactpoint
1264 VectorMA(linestart, impactdist, dir, impactpoint);
1265 // calculate impactnormal (surface normal at point of impact)
1266 VectorSubtract(impactpoint, sphereorigin, impactnormal);
1267 // normalize impactnormal
1268 VectorNormalize(impactnormal);
1269 // return fraction of movement distance
1270 return impactdist / linelength;
1273 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, texture_t *texture)
1277 float d1, d2, d, f, impact[3], edgenormal[3], faceplanenormal[3], faceplanedist, faceplanenormallength2, edge01[3], edge21[3], edge02[3];
1279 // this function executes:
1280 // 32 ops when line starts behind triangle
1281 // 38 ops when line ends infront of triangle
1282 // 43 ops when line fraction is already closer than this triangle
1283 // 72 ops when line is outside edge 01
1284 // 92 ops when line is outside edge 21
1285 // 115 ops when line is outside edge 02
1286 // 123 ops when line impacts triangle and updates trace results
1288 // this code is designed for clockwise triangles, conversion to
1289 // counterclockwise would require swapping some things around...
1290 // it is easier to simply swap the point0 and point2 parameters to this
1291 // function when calling it than it is to rewire the internals.
1293 // calculate the faceplanenormal of the triangle, this represents the front side
1295 VectorSubtract(point0, point1, edge01);
1296 VectorSubtract(point2, point1, edge21);
1297 CrossProduct(edge01, edge21, faceplanenormal);
1298 // there's no point in processing a degenerate triangle (GIGO - Garbage In, Garbage Out)
1300 faceplanenormallength2 = DotProduct(faceplanenormal, faceplanenormal);
1301 if (faceplanenormallength2 < 0.0001f)
1303 // calculate the distance
1305 faceplanedist = DotProduct(point0, faceplanenormal);
1307 // if start point is on the back side there is no collision
1308 // (we don't care about traces going through the triangle the wrong way)
1310 // calculate the start distance
1312 d1 = DotProduct(faceplanenormal, linestart);
1313 if (d1 <= faceplanedist)
1316 // calculate the end distance
1318 d2 = DotProduct(faceplanenormal, lineend);
1319 // if both are in front, there is no collision
1320 if (d2 >= faceplanedist)
1323 // from here on we know d1 is >= 0 and d2 is < 0
1324 // this means the line starts infront and ends behind, passing through it
1326 // calculate the recipricol of the distance delta,
1327 // so we can use it multiple times cheaply (instead of division)
1329 d = 1.0f / (d1 - d2);
1330 // calculate the impact fraction by taking the start distance (> 0)
1331 // and subtracting the face plane distance (this is the distance of the
1332 // triangle along that same normal)
1333 // then multiply by the recipricol distance delta
1335 f = (d1 - faceplanedist) * d;
1336 // skip out if this impact is further away than previous ones
1338 if (f > trace->realfraction)
1340 // calculate the perfect impact point for classification of insidedness
1342 impact[0] = linestart[0] + f * (lineend[0] - linestart[0]);
1343 impact[1] = linestart[1] + f * (lineend[1] - linestart[1]);
1344 impact[2] = linestart[2] + f * (lineend[2] - linestart[2]);
1346 // calculate the edge normal and reject if impact is outside triangle
1347 // (an edge normal faces away from the triangle, to get the desired normal
1348 // a crossproduct with the faceplanenormal is used, and because of the way
1349 // the insidedness comparison is written it does not need to be normalized)
1351 // first use the two edges from the triangle plane math
1352 // the other edge only gets calculated if the point survives that long
1355 CrossProduct(edge01, faceplanenormal, edgenormal);
1356 if (DotProduct(impact, edgenormal) > DotProduct(point1, edgenormal))
1360 CrossProduct(faceplanenormal, edge21, edgenormal);
1361 if (DotProduct(impact, edgenormal) > DotProduct(point2, edgenormal))
1365 VectorSubtract(point0, point2, edge02);
1366 CrossProduct(faceplanenormal, edge02, edgenormal);
1367 if (DotProduct(impact, edgenormal) > DotProduct(point0, edgenormal))
1372 // store the new trace fraction
1373 trace->realfraction = f;
1375 // calculate a nudged fraction to keep it out of the surface
1376 // (the main fraction remains perfect)
1377 trace->fraction = f - collision_impactnudge.value * d;
1379 if (collision_prefernudgedfraction.integer)
1380 trace->realfraction = trace->fraction;
1382 // store the new trace plane (because collisions only happen from
1383 // the front this is always simply the triangle normal, never flipped)
1384 d = 1.0 / sqrt(faceplanenormallength2);
1385 VectorScale(faceplanenormal, d, trace->plane.normal);
1386 trace->plane.dist = faceplanedist * d;
1388 trace->hitsupercontents = supercontents;
1389 trace->hitq3surfaceflags = q3surfaceflags;
1390 trace->hittexture = texture;
1392 float d1, d2, d, f, fnudged, impact[3], edgenormal[3], faceplanenormal[3], faceplanedist, edge[3];
1394 // this code is designed for clockwise triangles, conversion to
1395 // counterclockwise would require swapping some things around...
1396 // it is easier to simply swap the point0 and point2 parameters to this
1397 // function when calling it than it is to rewire the internals.
1399 // calculate the unnormalized faceplanenormal of the triangle,
1400 // this represents the front side
1401 TriangleNormal(point0, point1, point2, faceplanenormal);
1402 // there's no point in processing a degenerate triangle
1403 // (GIGO - Garbage In, Garbage Out)
1404 if (DotProduct(faceplanenormal, faceplanenormal) < 0.0001f)
1406 // calculate the unnormalized distance
1407 faceplanedist = DotProduct(point0, faceplanenormal);
1409 // calculate the unnormalized start distance
1410 d1 = DotProduct(faceplanenormal, linestart) - faceplanedist;
1411 // if start point is on the back side there is no collision
1412 // (we don't care about traces going through the triangle the wrong way)
1416 // calculate the unnormalized end distance
1417 d2 = DotProduct(faceplanenormal, lineend) - faceplanedist;
1418 // if both are in front, there is no collision
1422 // from here on we know d1 is >= 0 and d2 is < 0
1423 // this means the line starts infront and ends behind, passing through it
1425 // calculate the recipricol of the distance delta,
1426 // so we can use it multiple times cheaply (instead of division)
1427 d = 1.0f / (d1 - d2);
1428 // calculate the impact fraction by taking the start distance (> 0)
1429 // and subtracting the face plane distance (this is the distance of the
1430 // triangle along that same normal)
1431 // then multiply by the recipricol distance delta
1433 // skip out if this impact is further away than previous ones
1434 if (f > trace->realfraction)
1436 // calculate the perfect impact point for classification of insidedness
1437 impact[0] = linestart[0] + f * (lineend[0] - linestart[0]);
1438 impact[1] = linestart[1] + f * (lineend[1] - linestart[1]);
1439 impact[2] = linestart[2] + f * (lineend[2] - linestart[2]);
1441 // calculate the edge normal and reject if impact is outside triangle
1442 // (an edge normal faces away from the triangle, to get the desired normal
1443 // a crossproduct with the faceplanenormal is used, and because of the way
1444 // the insidedness comparison is written it does not need to be normalized)
1446 VectorSubtract(point2, point0, edge);
1447 CrossProduct(edge, faceplanenormal, edgenormal);
1448 if (DotProduct(impact, edgenormal) > DotProduct(point0, edgenormal))
1451 VectorSubtract(point0, point1, edge);
1452 CrossProduct(edge, faceplanenormal, edgenormal);
1453 if (DotProduct(impact, edgenormal) > DotProduct(point1, edgenormal))
1456 VectorSubtract(point1, point2, edge);
1457 CrossProduct(edge, faceplanenormal, edgenormal);
1458 if (DotProduct(impact, edgenormal) > DotProduct(point2, edgenormal))
1461 // store the new trace fraction
1462 trace->realfraction = bound(0, f, 1);
1464 // store the new trace plane (because collisions only happen from
1465 // the front this is always simply the triangle normal, never flipped)
1466 VectorNormalize(faceplanenormal);
1467 VectorCopy(faceplanenormal, trace->plane.normal);
1468 trace->plane.dist = DotProduct(point0, faceplanenormal);
1470 // calculate the normalized start and end distances
1471 d1 = DotProduct(trace->plane.normal, linestart) - trace->plane.dist;
1472 d2 = DotProduct(trace->plane.normal, lineend) - trace->plane.dist;
1474 // calculate a nudged fraction to keep it out of the surface
1475 // (the main fraction remains perfect)
1476 fnudged = (d1 - collision_impactnudge.value) / (d1 - d2);
1477 trace->fraction = bound(0, fnudged, 1);
1479 // store the new trace endpos
1480 // not needed, it's calculated later when the trace is finished
1481 //trace->endpos[0] = linestart[0] + fnudged * (lineend[0] - linestart[0]);
1482 //trace->endpos[1] = linestart[1] + fnudged * (lineend[1] - linestart[1]);
1483 //trace->endpos[2] = linestart[2] + fnudged * (lineend[2] - linestart[2]);
1484 trace->hitsupercontents = supercontents;
1485 trace->hitq3surfaceflags = q3surfaceflags;
1486 trace->hittexture = texture;
1490 typedef struct colbspnode_s
1493 struct colbspnode_s *children[2];
1494 // the node is reallocated or split if max is reached
1497 colbrushf_t **colbrushflist;
1500 //colbrushd_t **colbrushdlist;
1504 typedef struct colbsp_s
1507 colbspnode_t *nodes;
1511 colbsp_t *Collision_CreateCollisionBSP(mempool_t *mempool)
1514 bsp = (colbsp_t *)Mem_Alloc(mempool, sizeof(colbsp_t));
1515 bsp->mempool = mempool;
1516 bsp->nodes = (colbspnode_t *)Mem_Alloc(bsp->mempool, sizeof(colbspnode_t));
1520 void Collision_FreeCollisionBSPNode(colbspnode_t *node)
1522 if (node->children[0])
1523 Collision_FreeCollisionBSPNode(node->children[0]);
1524 if (node->children[1])
1525 Collision_FreeCollisionBSPNode(node->children[1]);
1526 while (--node->numcolbrushf)
1527 Mem_Free(node->colbrushflist[node->numcolbrushf]);
1528 //while (--node->numcolbrushd)
1529 // Mem_Free(node->colbrushdlist[node->numcolbrushd]);
1533 void Collision_FreeCollisionBSP(colbsp_t *bsp)
1535 Collision_FreeCollisionBSPNode(bsp->nodes);
1539 void Collision_BoundingBoxOfBrushTraceSegment(const colbrushf_t *start, const colbrushf_t *end, vec3_t mins, vec3_t maxs, float startfrac, float endfrac)
1542 colpointf_t *ps, *pe;
1543 float tempstart[3], tempend[3];
1544 VectorLerp(start->points[0].v, startfrac, end->points[0].v, mins);
1545 VectorCopy(mins, maxs);
1546 for (i = 0, ps = start->points, pe = end->points;i < start->numpoints;i++, ps++, pe++)
1548 VectorLerp(ps->v, startfrac, pe->v, tempstart);
1549 VectorLerp(ps->v, endfrac, pe->v, tempend);
1550 mins[0] = min(mins[0], min(tempstart[0], tempend[0]));
1551 mins[1] = min(mins[1], min(tempstart[1], tempend[1]));
1552 mins[2] = min(mins[2], min(tempstart[2], tempend[2]));
1553 maxs[0] = min(maxs[0], min(tempstart[0], tempend[0]));
1554 maxs[1] = min(maxs[1], min(tempstart[1], tempend[1]));
1555 maxs[2] = min(maxs[2], min(tempstart[2], tempend[2]));
1565 //===========================================
1567 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 start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int hitsupercontentsmask)
1569 float starttransformed[3], endtransformed[3];
1571 memset(trace, 0, sizeof(*trace));
1572 trace->fraction = trace->realfraction = 1;
1574 Matrix4x4_Transform(inversematrix, start, starttransformed);
1575 Matrix4x4_Transform(inversematrix, end, endtransformed);
1576 #if COLLISIONPARANOID >= 3
1577 Con_Printf("trans(%f %f %f -> %f %f %f, %f %f %f -> %f %f %f)", start[0], start[1], start[2], starttransformed[0], starttransformed[1], starttransformed[2], end[0], end[1], end[2], endtransformed[0], endtransformed[1], endtransformed[2]);
1580 if (model && model->TraceBox)
1581 model->TraceBox(model, frameblend, skeleton, trace, starttransformed, mins, maxs, endtransformed, hitsupercontentsmask);
1583 Collision_ClipTrace_Box(trace, bodymins, bodymaxs, starttransformed, mins, maxs, endtransformed, hitsupercontentsmask, bodysupercontents, 0, NULL);
1584 trace->fraction = bound(0, trace->fraction, 1);
1585 trace->realfraction = bound(0, trace->realfraction, 1);
1587 VectorLerp(start, trace->fraction, end, trace->endpos);
1589 // NOTE: this relies on plane.dist being directly after plane.normal
1590 Matrix4x4_TransformPositivePlane(matrix, trace->plane.normal[0], trace->plane.normal[1], trace->plane.normal[2], trace->plane.dist, trace->plane.normal);
1593 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)
1595 memset(trace, 0, sizeof(*trace));
1596 trace->fraction = trace->realfraction = 1;
1597 if (model && model->TraceBox)
1598 model->TraceBox(model, NULL, NULL, trace, start, mins, maxs, end, hitsupercontents);
1599 trace->fraction = bound(0, trace->fraction, 1);
1600 trace->realfraction = bound(0, trace->realfraction, 1);
1601 VectorLerp(start, trace->fraction, end, trace->endpos);
1604 void Collision_ClipLineToGenericEntity(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 start, const vec3_t end, int hitsupercontentsmask)
1606 float starttransformed[3], endtransformed[3];
1608 memset(trace, 0, sizeof(*trace));
1609 trace->fraction = trace->realfraction = 1;
1611 Matrix4x4_Transform(inversematrix, start, starttransformed);
1612 Matrix4x4_Transform(inversematrix, end, endtransformed);
1613 #if COLLISIONPARANOID >= 3
1614 Con_Printf("trans(%f %f %f -> %f %f %f, %f %f %f -> %f %f %f)", start[0], start[1], start[2], starttransformed[0], starttransformed[1], starttransformed[2], end[0], end[1], end[2], endtransformed[0], endtransformed[1], endtransformed[2]);
1617 if (model && model->TraceLine)
1618 model->TraceLine(model, frameblend, skeleton, trace, starttransformed, endtransformed, hitsupercontentsmask);
1620 Collision_ClipTrace_Box(trace, bodymins, bodymaxs, starttransformed, vec3_origin, vec3_origin, endtransformed, hitsupercontentsmask, bodysupercontents, 0, NULL);
1621 trace->fraction = bound(0, trace->fraction, 1);
1622 trace->realfraction = bound(0, trace->realfraction, 1);
1624 VectorLerp(start, trace->fraction, end, trace->endpos);
1626 // NOTE: this relies on plane.dist being directly after plane.normal
1627 Matrix4x4_TransformPositivePlane(matrix, trace->plane.normal[0], trace->plane.normal[1], trace->plane.normal[2], trace->plane.dist, trace->plane.normal);
1630 void Collision_ClipLineToWorld(trace_t *trace, dp_model_t *model, const vec3_t start, const vec3_t end, int hitsupercontents)
1632 memset(trace, 0, sizeof(*trace));
1633 trace->fraction = trace->realfraction = 1;
1634 if (model && model->TraceLine)
1635 model->TraceLine(model, NULL, NULL, trace, start, end, hitsupercontents);
1636 trace->fraction = bound(0, trace->fraction, 1);
1637 trace->realfraction = bound(0, trace->realfraction, 1);
1638 VectorLerp(start, trace->fraction, end, trace->endpos);
1641 void Collision_ClipPointToGenericEntity(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 start, int hitsupercontentsmask)
1643 float starttransformed[3];
1645 memset(trace, 0, sizeof(*trace));
1646 trace->fraction = trace->realfraction = 1;
1648 Matrix4x4_Transform(inversematrix, start, starttransformed);
1649 #if COLLISIONPARANOID >= 3
1650 Con_Printf("trans(%f %f %f -> %f %f %f)", start[0], start[1], start[2], starttransformed[0], starttransformed[1], starttransformed[2]);
1653 if (model && model->TracePoint)
1654 model->TracePoint(model, NULL, NULL, trace, starttransformed, hitsupercontentsmask);
1656 Collision_ClipTrace_Point(trace, bodymins, bodymaxs, starttransformed, hitsupercontentsmask, bodysupercontents, 0, NULL);
1658 VectorCopy(start, trace->endpos);
1660 // NOTE: this relies on plane.dist being directly after plane.normal
1661 Matrix4x4_TransformPositivePlane(matrix, trace->plane.normal[0], trace->plane.normal[1], trace->plane.normal[2], trace->plane.dist, trace->plane.normal);
1664 void Collision_ClipPointToWorld(trace_t *trace, dp_model_t *model, const vec3_t start, int hitsupercontents)
1666 memset(trace, 0, sizeof(*trace));
1667 trace->fraction = trace->realfraction = 1;
1668 if (model && model->TracePoint)
1669 model->TracePoint(model, NULL, NULL, trace, start, hitsupercontents);
1670 VectorCopy(start, trace->endpos);
1673 void Collision_CombineTraces(trace_t *cliptrace, const trace_t *trace, void *touch, qboolean isbmodel)
1675 // take the 'best' answers from the new trace and combine with existing data
1676 if (trace->allsolid)
1677 cliptrace->allsolid = true;
1678 if (trace->startsolid)
1681 cliptrace->bmodelstartsolid = true;
1682 cliptrace->startsolid = true;
1683 if (cliptrace->realfraction == 1)
1684 cliptrace->ent = touch;
1685 if (cliptrace->startdepth > trace->startdepth)
1687 cliptrace->startdepth = trace->startdepth;
1688 VectorCopy(trace->startdepthnormal, cliptrace->startdepthnormal);
1691 // don't set this except on the world, because it can easily confuse
1692 // monsters underwater if there's a bmodel involved in the trace
1693 // (inopen && inwater is how they check water visibility)
1694 //if (trace->inopen)
1695 // cliptrace->inopen = true;
1697 cliptrace->inwater = true;
1698 if ((trace->realfraction <= cliptrace->realfraction) && (VectorLength2(trace->plane.normal) > 0))
1700 cliptrace->fraction = trace->fraction;
1701 cliptrace->realfraction = trace->realfraction;
1702 VectorCopy(trace->endpos, cliptrace->endpos);
1703 cliptrace->plane = trace->plane;
1704 cliptrace->ent = touch;
1705 cliptrace->hitsupercontents = trace->hitsupercontents;
1706 cliptrace->hitq3surfaceflags = trace->hitq3surfaceflags;
1707 cliptrace->hittexture = trace->hittexture;
1709 cliptrace->startsupercontents |= trace->startsupercontents;
1712 void Collision_ShortenTrace(trace_t *trace, float shorten_factor, const vec3_t end)
1714 // now undo our moving end 1 qu farther...
1715 trace->fraction = bound(trace->fraction, trace->fraction / shorten_factor - 1e-6, 1); // we subtract 1e-6 to guard for roundoff errors
1716 trace->realfraction = bound(trace->realfraction, trace->realfraction / shorten_factor - 1e-6, 1); // we subtract 1e-6 to guard for roundoff errors
1717 if(trace->fraction >= 1) // trace would NOT hit if not expanded!
1719 trace->fraction = 1;
1720 trace->realfraction = 1;
1721 VectorCopy(end, trace->endpos);
1722 memset(&trace->plane, 0, sizeof(trace->plane));
1724 trace->hitsupercontentsmask = 0;
1725 trace->hitsupercontents = 0;
1726 trace->hitq3surfaceflags = 0;
1727 trace->hittexture = NULL;