int ret;
mplane_t *plane;
double t1, t2;
- //double frac;
- //double mid[3];
// variables that need to be stored on the stack when recursing
dclipnode_t *node;
// used if start and end are the same
static void RecursiveHullCheckPoint (RecursiveHullCheckTraceInfo_t *t, int num)
{
+ // If you can read this, you understand BSP trees
while (num >= 0)
num = t->hull->clipnodes[num].children[((t->hull->planes[t->hull->clipnodes[num].planenum].type < 3) ? (t->start[t->hull->planes[t->hull->clipnodes[num].planenum].type]) : (DotProduct(t->hull->planes[t->hull->clipnodes[num].planenum].normal, t->start))) < t->hull->planes[t->hull->clipnodes[num].planenum].dist];
VectorCopy(endd, rhc.end);
VectorCopy(rhc.end, rhc.trace->endpos);
VectorSubtract(rhc.end, rhc.start, rhc.dist);
- if (DotProduct(rhc.dist, rhc.dist) > 0.00001)
+ if (rhc.dist[0] || rhc.dist[1] || rhc.dist[2])
RecursiveHullCheck (&rhc, rhc.hull->firstclipnode, 0, 1, rhc.start, rhc.end);
else
RecursiveHullCheckPoint (&rhc, rhc.hull->firstclipnode);
+ if (rhc.trace->fraction < 0 || rhc.trace->fraction > 1) Con_Printf("fraction out of bounds %f %s:%d\n", rhc.trace->fraction, __FILE__, __LINE__);
// if we hit, unrotate endpos and normal, and store the entity we hit
if (rhc.trace->fraction != 1)
VectorSubtract(end, offset, rhc.end);
VectorCopy(rhc.end, rhc.trace->endpos);
VectorSubtract(rhc.end, rhc.start, rhc.dist);
- if (DotProduct(rhc.dist, rhc.dist) > 0.00001)
+ if (rhc.dist[0] || rhc.dist[1] || rhc.dist[2])
RecursiveHullCheck (&rhc, rhc.hull->firstclipnode, 0, 1, rhc.start, rhc.end);
else
RecursiveHullCheckPoint (&rhc, rhc.hull->firstclipnode);
+ if (rhc.trace->fraction < 0 || rhc.trace->fraction > 1) Con_Printf("fraction out of bounds %f %s:%d\n", rhc.trace->fraction, __FILE__, __LINE__);
// if we hit, store the entity we hit
if (rhc.trace->fraction != 1)
rhc.trace->ent = (void *) cent;
}
}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+void Collision_PrintBrushAsQHull(colbrushf_t *brush, const char *name)
+{
+ int i;
+ Con_Printf("3 %s\n%i\n", name, brush->numpoints);
+ for (i = 0;i < brush->numpoints;i++)
+ Con_Printf("%g %g %g\n", brush->points[i].v[0], brush->points[i].v[1], brush->points[i].v[2]);
+ // FIXME: optimize!
+ Con_Printf("4\n%i\n", brush->numplanes);
+ for (i = 0;i < brush->numplanes;i++)
+ Con_Printf("%g %g %g %g\n", brush->planes[i].normal[0], brush->planes[i].normal[1], brush->planes[i].normal[2], brush->planes[i].dist);
+}
+
+
+colbrushf_t *Collision_AllocBrushFloat(mempool_t *mempool, int numpoints, int numplanes)
+{
+ colbrushf_t *brush;
+ brush = Mem_Alloc(mempool, sizeof(colbrushf_t) + sizeof(colpointf_t) * numpoints + sizeof(colplanef_t) * numplanes);
+ brush->numpoints = numpoints;
+ brush->numplanes = numplanes;
+ brush->planes = (void *)(brush + 1);
+ brush->points = (void *)(brush->planes + brush->numplanes);
+ return brush;
+}
+
+void Collision_CalcPlanesForPolygonBrushFloat(colbrushf_t *brush)
+{
+ int i;
+ float edge0[3], edge1[3], normal[3], dist, bestdist;
+ colpointf_t *p, *p2;
+
+ // choose best surface normal for polygon's plane
+ bestdist = 0;
+ for (i = 0, p = brush->points + 1;i < brush->numpoints - 2;i++, p++)
+ {
+ VectorSubtract(p[-1].v, p[0].v, edge0);
+ VectorSubtract(p[1].v, p[0].v, edge1);
+ CrossProduct(edge0, edge1, normal);
+ dist = DotProduct(normal, normal);
+ if (i == 0 || bestdist < dist)
+ {
+ bestdist = dist;
+ VectorCopy(normal, brush->planes->normal);
+ }
+ }
+
+ 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);
+ }
+
+#if 1
+ // validity check - will be disabled later
+ for (i = 0;i < brush->numplanes;i++)
+ {
+ int j;
+ for (j = 0, p = brush->points;j < brush->numpoints;j++, p++)
+ if (DotProduct(p->v, brush->planes[i].normal) > brush->planes[i].dist + (1.0 / 32.0))
+ Con_Printf("Error in brush plane generation, plane %i\n", i);
+ }
+#endif
+}
+
+colbrushf_t *Collision_AllocBrushFromPermanentPolygonFloat(mempool_t *mempool, int numpoints, float *points)
+{
+ colbrushf_t *brush;
+ brush = Mem_Alloc(mempool, sizeof(colbrushf_t) + sizeof(colplanef_t) * (numpoints + 2));
+ brush->numpoints = numpoints;
+ brush->numplanes = numpoints + 2;
+ brush->planes = (void *)(brush + 1);
+ brush->points = (colpointf_t *)points;
+ return brush;
+}
+
+float nearestplanedist_float(const float *normal, const colpointf_t *points, int numpoints)
+{
+ float dist, bestdist;
+ bestdist = DotProduct(points->v, normal);
+ points++;
+ while(--numpoints)
+ {
+ dist = DotProduct(points->v, normal);
+ if (bestdist > dist)
+ bestdist = dist;
+ points++;
+ }
+ return bestdist;
+}
+
+float furthestplanedist_float(const float *normal, const colpointf_t *points, int numpoints)
+{
+ float dist, bestdist;
+ bestdist = DotProduct(points->v, normal);
+ points++;
+ while(--numpoints)
+ {
+ dist = DotProduct(points->v, normal);
+ if (bestdist < dist)
+ bestdist = dist;
+ points++;
+ }
+ return bestdist;
+}
+
+#define COLLISIONEPSILON (1.0f / 32.0f)
+#define COLLISIONEPSILON2 0//(1.0f / 32.0f)
+
+// NOTE: start and end of each brush pair must have same numplanes/numpoints
+float Collision_TraceBrushBrushFloat(const colbrushf_t *thisbrush_start, const colbrushf_t *thisbrush_end, const colbrushf_t *thatbrush_start, const colbrushf_t *thatbrush_end, float *impactnormal, int *startsolid, int *allsolid)
+{
+ int nplane, nplane2, fstartsolid, fendsolid;
+ float enterfrac, leavefrac, d1, d2, f, newimpactnormal[3];
+ const colplanef_t *startplane, *endplane;
+
+ enterfrac = -1;
+ leavefrac = 1;
+ fstartsolid = true;
+ fendsolid = true;
+
+ for (nplane = 0;nplane < thatbrush_start->numplanes + thisbrush_start->numplanes;nplane++)
+ {
+ nplane2 = nplane;
+ if (nplane2 >= thatbrush_start->numplanes)
+ {
+ nplane2 -= thatbrush_start->numplanes;
+ startplane = thisbrush_start->planes + nplane2;
+ endplane = thisbrush_end->planes + nplane2;
+ }
+ else
+ {
+ startplane = thatbrush_start->planes + nplane2;
+ endplane = thatbrush_end->planes + nplane2;
+ }
+ d1 = nearestplanedist_float(startplane->normal, thisbrush_start->points, thisbrush_start->numpoints) - furthestplanedist_float(startplane->normal, thatbrush_start->points, thatbrush_start->numpoints);
+ d2 = nearestplanedist_float(endplane->normal, thisbrush_end->points, thisbrush_end->numpoints) - furthestplanedist_float(endplane->normal, thatbrush_end->points, thatbrush_end->numpoints) - COLLISIONEPSILON2;
+ //Con_Printf("%c%i: d1 = %f, d2 = %f, d1 / (d1 - d2) = %f\n", nplane2 != nplane ? 'b' : 'a', nplane2, d1, d2, d1 / (d1 - d2));
+
+ f = d1 - d2;
+ if (f >= 0)
+ {
+ // moving into brush
+ if (d2 > 0)
+ return 1;
+ if (d1 < 0)
+ continue;
+ // enter
+ fstartsolid = false;
+ f = (d1 - COLLISIONEPSILON) / f;
+ f = bound(0, f, 1);
+ if (enterfrac < f)
+ {
+ enterfrac = f;
+ VectorBlend(startplane->normal, endplane->normal, enterfrac, newimpactnormal);
+ }
+ }
+ else if (f < 0)
+ {
+ // moving out of brush
+ if (d1 > 0)
+ return 1;
+ if (d2 < 0)
+ continue;
+ // leave
+ fendsolid = false;
+ f = (d1 + COLLISIONEPSILON) / f;
+ f = bound(0, f, 1);
+ if (leavefrac > f)
+ leavefrac = f;
+ }
+ }
+
+ if (fstartsolid)
+ {
+ if (startsolid)
+ *startsolid = true;
+ if (fendsolid && allsolid)
+ *allsolid = true;
+ }
+
+ // LordHavoc: we need an epsilon nudge here because for a point trace the
+ // penetrating line segment is normally zero length if this brush was
+ // generated from a polygon (infinitely thin), and could even be slightly
+ // positive or negative due to rounding errors in that case.
+ if (enterfrac > -1 && enterfrac < 1 && enterfrac - (1.0f / 1024.0f) <= leavefrac)
+ {
+ //if (enterfrac < (1.0f / 1024.0f))
+ // enterfrac = 0;
+ enterfrac = bound(0, enterfrac, 1);
+ VectorCopy(newimpactnormal, impactnormal);
+ return enterfrac;
+ }
+ return 1;
+}
+
+static colplanef_t polyf_planes[256 + 2];
+static colbrushf_t polyf_brush;
+
+float Collision_TraceBrushPolygonFloat(const colbrushf_t *thisbrush_start, const colbrushf_t *thisbrush_end, int numpoints, const float *points, float *impactnormal, int *startsolid, int *allsolid)
+{
+ if (numpoints > 256)
+ {
+ Con_Printf("Polygon with more than 256 points not supported yet (fixme!)\n");
+ return 1;
+ }
+ polyf_brush.numpoints = numpoints;
+ polyf_brush.numplanes = numpoints + 2;
+ polyf_brush.points = (colpointf_t *)points;
+ polyf_brush.planes = polyf_planes;
+ Collision_CalcPlanesForPolygonBrushFloat(&polyf_brush);
+ //Collision_PrintBrushAsQHull(&polyf_brush, "polyf_brush");
+ return Collision_TraceBrushBrushFloat(thisbrush_start, thisbrush_end, &polyf_brush, &polyf_brush, impactnormal, startsolid, allsolid);
+}
+
+static colpointf_t polyf_pointsstart[256], polyf_pointsend[256];
+static colplanef_t polyf_planesstart[256 + 2], polyf_planesend[256 + 2];
+static colbrushf_t polyf_brushstart, polyf_brushend;
+
+float Collision_TraceBrushPolygonTransformFloat(const colbrushf_t *thisbrush_start, const colbrushf_t *thisbrush_end, int numpoints, const float *points, float *impactnormal, const matrix4x4_t *polygonmatrixstart, const matrix4x4_t *polygonmatrixend, int *startsolid, int *allsolid)
+{
+ int i;
+ if (numpoints > 256)
+ {
+ Con_Printf("Polygon with more than 256 points not supported yet (fixme!)\n");
+ return 1;
+ }
+ polyf_brushstart.numpoints = numpoints;
+ polyf_brushstart.numplanes = numpoints + 2;
+ polyf_brushstart.points = polyf_pointsstart;//(colpointf_t *)points;
+ polyf_brushstart.planes = polyf_planesstart;
+ for (i = 0;i < numpoints;i++)
+ Matrix4x4_Transform(polygonmatrixstart, points + i * 3, polyf_brushstart.points[i].v);
+ polyf_brushend.numpoints = numpoints;
+ polyf_brushend.numplanes = numpoints + 2;
+ polyf_brushend.points = polyf_pointsend;//(colpointf_t *)points;
+ polyf_brushend.planes = polyf_planesend;
+ for (i = 0;i < numpoints;i++)
+ Matrix4x4_Transform(polygonmatrixend, points + i * 3, polyf_brushend.points[i].v);
+ Collision_CalcPlanesForPolygonBrushFloat(&polyf_brushstart);
+ Collision_CalcPlanesForPolygonBrushFloat(&polyf_brushend);
+
+ //Collision_PrintBrushAsQHull(&polyf_brushstart, "polyf_brushstart");
+ //Collision_PrintBrushAsQHull(&polyf_brushend, "polyf_brushend");
+
+ return Collision_TraceBrushBrushFloat(thisbrush_start, thisbrush_end, &polyf_brushstart, &polyf_brushend, impactnormal, startsolid, allsolid);
+}
+
+colbrushd_t *Collision_AllocBrushDouble(mempool_t *mempool, int numpoints, int numplanes)
+{
+ colbrushd_t *brush;
+ brush = Mem_Alloc(mempool, sizeof(colbrushd_t) + sizeof(colpointd_t) * numpoints + sizeof(colplaned_t) * numplanes);
+ brush->numpoints = numpoints;
+ brush->numplanes = numplanes;
+ brush->planes = (void *)(brush + 1);
+ brush->points = (void *)(brush->planes + brush->numplanes);
+ return brush;
+}
+
+void Collision_CalcPlanesForPolygonBrushDouble(colbrushd_t *brush)
+{
+ int i;
+ double edge0[3], edge1[3], normal[3], dist, bestdist;
+ colpointd_t *p, *p2;
+
+ // choose best surface normal for polygon's plane
+ bestdist = 0;
+ for (i = 2, p = brush->points + 2;i < brush->numpoints;i++, p++)
+ {
+ VectorSubtract(p[-1].v, p[0].v, edge0);
+ VectorSubtract(p[1].v, p[0].v, edge1);
+ CrossProduct(edge0, edge1, normal);
+ dist = DotProduct(normal, normal);
+ if (i == 2 || bestdist < dist)
+ {
+ bestdist = dist;
+ VectorCopy(normal, brush->planes->normal);
+ }
+ }
+
+ 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 + 2;i < brush->numpoints;i++, p = p2, p2++)
+ {
+ VectorSubtract(p->v, p2->v, edge0);
+ CrossProduct(edge0, brush->planes->normal, brush->planes[i].normal);
+ VectorNormalize(brush->planes[i].normal);
+ brush->planes[i].dist = DotProduct(p->v, brush->planes[i].normal);
+ }
+
+#if 1
+ // validity check - will be disabled later
+ for (i = 0;i < brush->numplanes;i++)
+ {
+ int j;
+ for (j = 0, p = brush->points;j < brush->numpoints;j++, p++)
+ if (DotProduct(p->v, brush->planes[i].normal) > brush->planes[i].dist + (1.0 / 32.0))
+ Con_Printf("Error in brush plane generation, plane %i\n");
+ }
+#endif
+}
+
+colbrushd_t *Collision_AllocBrushFromPermanentPolygonDouble(mempool_t *mempool, int numpoints, double *points)
+{
+ colbrushd_t *brush;
+ brush = Mem_Alloc(mempool, sizeof(colbrushd_t) + sizeof(colplaned_t) * (numpoints + 2));
+ brush->numpoints = numpoints;
+ brush->numplanes = numpoints + 2;
+ brush->planes = (void *)(brush + 1);
+ brush->points = (colpointd_t *)points;
+ return brush;
+}
+
+
+double nearestplanedist_double(const double *normal, const colpointd_t *points, int numpoints)
+{
+ double dist, bestdist;
+ bestdist = DotProduct(points->v, normal);
+ points++;
+ while(--numpoints)
+ {
+ dist = DotProduct(points->v, normal);
+ if (bestdist > dist)
+ bestdist = dist;
+ points++;
+ }
+ return bestdist;
+}
+
+double furthestplanedist_double(const double *normal, const colpointd_t *points, int numpoints)
+{
+ double dist, bestdist;
+ bestdist = DotProduct(points->v, normal);
+ points++;
+ while(--numpoints)
+ {
+ dist = DotProduct(points->v, normal);
+ if (bestdist < dist)
+ bestdist = dist;
+ points++;
+ }
+ return bestdist;
+}
+
+// NOTE: start and end of each brush pair must have same numplanes/numpoints
+double Collision_TraceBrushBrushDouble(const colbrushd_t *thisbrush_start, const colbrushd_t *thisbrush_end, const colbrushd_t *thatbrush_start, const colbrushd_t *thatbrush_end, double *impactnormal)
+{
+ int nplane;
+ double enterfrac, leavefrac, d1, d2, f, newimpactnormal[3];
+ const colplaned_t *startplane, *endplane;
+
+ enterfrac = -1;
+ leavefrac = 1;
+
+ for (nplane = 0;nplane < thatbrush_start->numplanes;nplane++)
+ {
+ startplane = thatbrush_start->planes + nplane;
+ endplane = thatbrush_end->planes + nplane;
+ d1 = nearestplanedist_double(startplane->normal, thisbrush_start->points, thisbrush_start->numpoints) - furthestplanedist_double(startplane->normal, thatbrush_start->points, thatbrush_start->numpoints);
+ d2 = nearestplanedist_double(endplane->normal, thisbrush_end->points, thisbrush_start->numpoints) - furthestplanedist_double(endplane->normal, thatbrush_end->points, thatbrush_start->numpoints) - (1.0 / 32.0);
+
+ f = d1 - d2;
+ if (f >= 0)
+ {
+ // moving into brush
+ if (d2 > 0)
+ return 1;
+ if (d1 < 0)
+ continue;
+ // enter
+ f = d1 / f;
+ if (enterfrac < f)
+ {
+ enterfrac = f;
+ VectorSubtract(endplane->normal, startplane->normal, newimpactnormal);
+ VectorMA(startplane->normal, enterfrac, impactnormal, newimpactnormal);
+ }
+ }
+ else
+ {
+ // moving out of brush
+ if (d1 > 0)
+ return 1;
+ if (d2 < 0)
+ continue;
+ // leave
+ f = d1 / f;
+ if (leavefrac > f)
+ leavefrac = f;
+ }
+ }
+
+ for (nplane = 0;nplane < thisbrush_start->numplanes;nplane++)
+ {
+ startplane = thisbrush_start->planes + nplane;
+ endplane = thisbrush_end->planes + nplane;
+ d1 = nearestplanedist_double(startplane->normal, thisbrush_start->points, thisbrush_start->numpoints) - furthestplanedist_double(startplane->normal, thatbrush_start->points, thatbrush_start->numpoints);
+ d2 = nearestplanedist_double(endplane->normal, thisbrush_end->points, thisbrush_start->numpoints) - furthestplanedist_double(endplane->normal, thatbrush_end->points, thatbrush_start->numpoints) - (1.0 / 32.0);
+
+ f = d1 - d2;
+ if (f >= 0)
+ {
+ // moving into brush
+ if (d2 > 0)
+ return 1;
+ if (d1 < 0)
+ continue;
+ // enter
+ f = d1 / f;
+ if (enterfrac < f)
+ {
+ enterfrac = f;
+ VectorSubtract(endplane->normal, startplane->normal, newimpactnormal);
+ VectorMA(startplane->normal, enterfrac, impactnormal, newimpactnormal);
+ }
+ }
+ else
+ {
+ // moving out of brush
+ if (d1 > 0)
+ return 1;
+ if (d2 < 0)
+ continue;
+ // leave
+ f = d1 / f;
+ if (leavefrac > f)
+ leavefrac = f;
+ }
+ }
+
+ // LordHavoc: we need an epsilon nudge here because for a point trace the
+ // penetrating line segment is normally zero length if this brush was
+ // generated from a polygon (infinitely thin), and could even be slightly
+ // positive or negative due to rounding errors in that case.
+ enterfrac -= (1.0 / 16384.0);
+ if (leavefrac - enterfrac >= 0 && enterfrac > -1)
+ {
+ VectorCopy(newimpactnormal, impactnormal);
+ enterfrac = bound(0, enterfrac, 1);
+ return enterfrac;
+ }
+ return 1;
+}
+
+static colplaned_t polyd_planes[256 + 2];
+static colbrushd_t polyd_brush;
+double Collision_TraceBrushPolygonDouble(const colbrushd_t *thisbrush_start, const colbrushd_t *thisbrush_end, int numpoints, const double *points, double *impactnormal)
+{
+ if (numpoints > 256)
+ {
+ Con_Printf("Polygon with more than 256 points not supported yet (fixme!)\n");
+ return 1;
+ }
+ polyd_brush.numpoints = numpoints;
+ polyd_brush.numplanes = numpoints + 2;
+ polyd_brush.points = (colpointd_t *)points;
+ polyd_brush.planes = polyd_planes;
+ Collision_CalcPlanesForPolygonBrushDouble(&polyd_brush);
+ return Collision_TraceBrushBrushDouble(thisbrush_start, thisbrush_end, &polyd_brush, &polyd_brush, impactnormal);
+}
+
+
+
+
+typedef struct colbrushbmodelinfo_s
+{
+ model_t *model;
+ const matrix4x4_t *modelmatrixstart;
+ const matrix4x4_t *modelmatrixend;
+ const colbrushf_t *thisbrush_start;
+ const colbrushf_t *thisbrush_end;
+ float impactnormal[3];
+ float tempimpactnormal[3];
+ float fraction;
+ int startsolid;
+ int allsolid;
+}
+colbrushbmodelinfo_t;
+
+static int colframecount = 1;
+
+void Collision_RecursiveTraceBrushNode(colbrushbmodelinfo_t *info, mnode_t *node)
+{
+ if (node->contents)
+ {
+ // collide with surfaces marked by this leaf
+ int i, *mark;
+ float result;
+ mleaf_t *leaf = (mleaf_t *)node;
+ msurface_t *surf;
+ for (i = 0, mark = leaf->firstmarksurface;i < leaf->nummarksurfaces;i++, mark++)
+ {
+ surf = info->model->surfaces + *mark;
+ // don't check a surface twice
+ if (surf->colframe != colframecount)
+ {
+ surf->colframe = colframecount;
+ if (surf->flags & SURF_SOLIDCLIP)
+ {
+ result = Collision_TraceBrushPolygonFloat(info->thisbrush_start, info->thisbrush_end, surf->poly_numverts, surf->poly_verts, info->tempimpactnormal, &info->startsolid, &info->allsolid);
+ //result = Collision_TraceBrushPolygonTransformFloat(info->thisbrush_start, info->thisbrush_end, surf->poly_numverts, surf->poly_verts, info->tempimpactnormal, info->modelmatrixstart, info->modelmatrixend, &info->startsolid, &info->allsolid);
+ if (info->fraction > result)
+ {
+ info->fraction = result;
+ // use the surface's plane instead of the actual
+ // collision plane because the actual collision plane
+ // might be to the side (on a seam between polygons)
+ // or something, we want objects to bounce off the
+ // front...
+ //if (surf->flags & SURF_PLANEBACK)
+ // VectorNegate(surf->plane->normal, info->impactnormal);
+ //else
+ // VectorCopy(surf->plane->normal, info->impactnormal);
+ VectorCopy(info->tempimpactnormal, info->impactnormal);
+ }
+ }
+ }
+ }
+ }
+ else
+ {
+ // recurse down node sides
+ int i, bits;
+ float dist1, dist2;
+ colpointf_t *ps, *pe;
+ bits = 0;
+ // FIXME? if TraceBrushPolygonTransform were to be made usable, the
+ // node planes would need to be transformed too
+ dist1 = node->plane->dist - (1.0f / 8.0f);
+ dist2 = node->plane->dist + (1.0f / 8.0f);
+ for (i = 0, ps = info->thisbrush_start->points, pe = info->thisbrush_end->points;i < info->thisbrush_start->numpoints;i++, ps++, pe++)
+ {
+ if (!(bits & 1) && (DotProduct(ps->v, node->plane->normal) > dist1 || DotProduct(pe->v, node->plane->normal) > dist1))
+ bits |= 1;
+ if (!(bits & 2) && (DotProduct(ps->v, node->plane->normal) < dist2 || DotProduct(pe->v, node->plane->normal) < dist2))
+ bits |= 2;
+ }
+ if (bits & 1)
+ Collision_RecursiveTraceBrushNode(info, node->children[0]);
+ if (bits & 2)
+ Collision_RecursiveTraceBrushNode(info, node->children[1]);
+ }
+}
+
+float Collision_TraceBrushBModel(const colbrushf_t *thisbrush_start, const colbrushf_t *thisbrush_end, model_t *model, float *impactnormal, int *startsolid, int *allsolid)
+{
+ colbrushbmodelinfo_t info;
+ colframecount++;
+ info.model = model;
+ info.thisbrush_start = thisbrush_start;
+ info.thisbrush_end = thisbrush_end;
+ info.fraction = 1;
+ info.startsolid = false;
+ info.allsolid = false;
+ Collision_RecursiveTraceBrushNode(&info, model->nodes + model->hulls[0].firstclipnode);
+ if (info.fraction < 1)
+ VectorCopy(info.impactnormal, impactnormal);
+ if (startsolid)
+ *startsolid = info.startsolid;
+ if (allsolid)
+ *allsolid = info.allsolid;
+ return info.fraction;
+}
+
+float Collision_TraceBrushBModelTransform(const colbrushf_t *thisbrush_start, const colbrushf_t *thisbrush_end, model_t *model, float *impactnormal, const matrix4x4_t *modelmatrixstart, const matrix4x4_t *modelmatrixend, int *startsolid, int *allsolid)
+{
+ colbrushbmodelinfo_t info;
+ colframecount++;
+ info.model = model;
+ info.modelmatrixstart = modelmatrixstart;
+ info.modelmatrixend = modelmatrixend;
+ info.thisbrush_start = thisbrush_start;
+ info.thisbrush_end = thisbrush_end;
+ info.fraction = 1;
+ info.startsolid = false;
+ info.allsolid = false;
+ Collision_RecursiveTraceBrushNode(&info, model->nodes);
+ if (info.fraction < 1)
+ VectorCopy(info.impactnormal, impactnormal);
+ if (startsolid)
+ *startsolid = info.startsolid;
+ if (allsolid)
+ *allsolid = info.allsolid;
+ return info.fraction;
+}
+
+
+
+#define MAX_BRUSHFORBOX 16
+static int brushforbox_index = 0;
+static colpointf_t brushforbox_point[MAX_BRUSHFORBOX*8];
+static colplanef_t brushforbox_plane[MAX_BRUSHFORBOX*6];
+static colbrushf_t brushforbox_brush[MAX_BRUSHFORBOX];
+
+void Collision_InitBrushForBox(void)
+{
+ int i;
+ for (i = 0;i < MAX_BRUSHFORBOX;i++)
+ {
+ brushforbox_brush[i].numpoints = 8;
+ brushforbox_brush[i].numplanes = 6;
+ brushforbox_brush[i].points = brushforbox_point + i * 8;
+ brushforbox_brush[i].planes = brushforbox_plane + i * 6;
+ }
+}
+
+colbrushf_t *Collision_BrushForBox(const matrix4x4_t *matrix, const vec3_t mins, const vec3_t maxs)
+{
+ int i;
+ vec3_t v;
+ colbrushf_t *brush;
+ if (brushforbox_brush[0].numpoints == 0)
+ Collision_InitBrushForBox();
+ brush = brushforbox_brush + ((brushforbox_index++) % MAX_BRUSHFORBOX);
+ // FIXME: optimize
+ for (i = 0;i < 8;i++)
+ {
+ v[0] = i & 1 ? maxs[0] : mins[0];
+ v[1] = i & 2 ? maxs[1] : mins[1];
+ v[2] = i & 4 ? maxs[2] : mins[2];
+ Matrix4x4_Transform(matrix, v, brush->points[i].v);
+ }
+ // FIXME: optimize!
+ for (i = 0;i < 6;i++)
+ {
+ VectorClear(v);
+ v[i >> 1] = i & 1 ? 1 : -1;
+ Matrix4x4_Transform3x3(matrix, v, brush->planes[i].normal);
+ VectorNormalize(brush->planes[i].normal);
+ brush->planes[i].dist = furthestplanedist_float(brush->planes[i].normal, brush->points, brush->numpoints);
+ }
+ return brush;
+}
+
+void Collision_PolygonClipTrace (trace_t *trace, const void *cent, model_t *cmodel, const vec3_t corigin, const vec3_t cangles, const vec3_t cmins, const vec3_t cmaxs, const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end)
+{
+ vec3_t impactnormal;
+ //vec3_t mins2, maxs2;
+ matrix4x4_t cmatrix, cimatrix, startmatrix, endmatrix;
+ matrix4x4_t mstartmatrix, mendmatrix, identitymatrix;
+ colbrushf_t *thisbrush_start, *thisbrush_end, *cbrush;
+
+ Matrix4x4_CreateFromQuakeEntity(&cmatrix, corigin[0], corigin[1], corigin[2], cangles[0], cangles[1], cangles[2], 1);
+ Matrix4x4_Invert_Simple(&cimatrix, &cmatrix);
+ Matrix4x4_CreateTranslate(&startmatrix, start[0], start[1], start[2]);
+ Matrix4x4_CreateTranslate(&endmatrix, end[0], end[1], end[2]);
+
+ Matrix4x4_CreateIdentity(&identitymatrix);
+ Matrix4x4_Concat(&mstartmatrix, &cimatrix, &startmatrix);
+ Matrix4x4_Concat(&mendmatrix, &cimatrix, &endmatrix);
+ thisbrush_start = Collision_BrushForBox(&mstartmatrix, mins, maxs);
+ //mins2[0] = mins[0] - 0.0625;mins2[1] = mins[1] - 0.0625;mins2[2] = mins[2] - 0.0625;
+ //maxs2[0] = maxs[0] + 0.0625;maxs2[1] = maxs[1] + 0.0625;maxs2[2] = maxs[2] + 0.0625;
+ thisbrush_end = Collision_BrushForBox(&mendmatrix, mins, maxs);
+
+ //Collision_PrintBrushAsQHull(thisbrush_start, "thisbrush_start");
+ //Collision_PrintBrushAsQHull(thisbrush_end, "thisbrush_end");
+ memset (trace, 0, sizeof(trace_t));
+ if (cmodel && cmodel->type == mod_brush)
+ {
+ // brush model
+ trace->fraction = Collision_TraceBrushBModel(thisbrush_start, thisbrush_end, cmodel, impactnormal, &trace->startsolid, &trace->allsolid);
+ //trace->fraction = Collision_TraceBrushBModelTransform(thisbrush_start, thisbrush_end, cmodel, trace->plane.normal, &cmatrix, &cmatrix, &trace->startsolid, &trace->allsolid);
+ }
+ else
+ {
+ // bounding box
+ cbrush = Collision_BrushForBox(&identitymatrix, cmins, cmaxs);
+ trace->fraction = Collision_TraceBrushBrushFloat(thisbrush_start, thisbrush_end, cbrush, cbrush, impactnormal, &trace->startsolid, &trace->allsolid);
+ //cbrush = Collision_BrushForBox(&cmatrix, cmins, cmaxs);
+ //trace->fraction = Collision_TraceBrushBrushFloat(thisbrush_start, thisbrush_end, cbrush, cbrush, trace->plane.normal, &trace->startsolid, &trace->allsolid);
+ }
+
+ if (trace->fraction < 0 || trace->fraction > 1)
+ Con_Printf("fraction out of bounds %f %s:%d\n", trace->fraction, __FILE__, __LINE__);
+
+ if (trace->fraction < 1)
+ {
+ trace->ent = (void *) cent;
+ VectorBlend(start, end, trace->fraction, trace->endpos);
+ Matrix4x4_Transform(&cmatrix, impactnormal, trace->plane.normal);
+ VectorNormalize(trace->plane.normal);
+ //Con_Printf("fraction %f normal %f %f %f\n", trace->fraction, trace->plane.normal[0], trace->plane.normal[1], trace->plane.normal[2]);
+ }
+ else
+ VectorCopy(end, trace->endpos);
+}
+
projects / xonotic / darkplaces.git / blobdiff