]> de.git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - model_brush.c
added mod_collision_bih_childrengrouping cvar (default 16), this
[xonotic/darkplaces.git] / model_brush.c
index e58ba5c4f23b776276ee9eb102cb7bea1268ff2a..71c55bcccc7eed2ac3b0c4e2b3a543cfda68fd4b 100644 (file)
@@ -52,6 +52,7 @@ cvar_t mod_q3shader_default_polygonoffset = {0, "mod_q3shader_default_polygonoff
 
 cvar_t mod_q1bsp_polygoncollisions = {0, "mod_q1bsp_polygoncollisions", "0", "disables use of precomputed cliphulls and instead collides with polygons (uses Bounding Interval Hierarchy optimizations)"};
 cvar_t mod_collision_bih = {0, "mod_collision_bih", "1", "enables use of generated Bounding Interval Hierarchy tree instead of compiled bsp tree in collision code"};
+cvar_t mod_collision_bih_childrengrouping = {0, "mod_collision_bih_childrengrouping", "16", "this setting prevents excessive recursion depth in the BIH tree by building a shallow tree"};
 cvar_t mod_recalculatenodeboxes = {0, "mod_recalculatenodeboxes", "1", "enables use of generated node bounding boxes based on BSP tree portal reconstruction, rather than the node boxes supplied by the map compiler"};
 
 static texture_t mod_q1bsp_texture_solid;
@@ -87,6 +88,7 @@ void Mod_BrushInit(void)
        Cvar_RegisterVariable(&mod_q3shader_default_polygonoffset);
        Cvar_RegisterVariable(&mod_q1bsp_polygoncollisions);
        Cvar_RegisterVariable(&mod_collision_bih);
+       Cvar_RegisterVariable(&mod_collision_bih_childrengrouping);
        Cvar_RegisterVariable(&mod_recalculatenodeboxes);
 
        memset(&mod_q1bsp_texture_solid, 0, sizeof(mod_q1bsp_texture_solid));
@@ -1293,6 +1295,188 @@ void Mod_Q1BSP_LightPoint(dp_model_t *model, const vec3_t p, vec3_t ambientcolor
        Mod_Q1BSP_LightPoint_RecursiveBSPNode(model, ambientcolor, diffusecolor, diffusenormal, model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode, p[0], p[1], p[2] + 0.125, p[2] - 65536);
 }
 
+static const texture_t *Mod_Q1BSP_TraceLineAgainstSurfacesFindTextureOnNode(RecursiveHullCheckTraceInfo_t *t, const dp_model_t *model, const mnode_t *node, double mid[3])
+{
+       int i;
+       int j;
+       int k;
+       const msurface_t *surface;
+       float normal[3];
+       float v0[3];
+       float v1[3];
+       float edgedir[3];
+       float edgenormal[3];
+       float p[4];
+       float midf;
+       float t1;
+       float t2;
+       VectorCopy(mid, p);
+       p[3] = 1;
+       surface = model->data_surfaces + node->firstsurface;
+       for (i = 0;i < node->numsurfaces;i++, surface++)
+       {
+               // skip surfaces whose bounding box does not include the point
+//             if (!BoxesOverlap(mid, mid, surface->mins, surface->maxs))
+//                     continue;
+               // skip faces with contents we don't care about
+               if (!(t->trace->hitsupercontentsmask & surface->texture->supercontents))
+                       continue;
+               // get the surface normal - since it is flat we know any vertex normal will suffice
+               VectorCopy(model->surfmesh.data_normal3f + 3 * surface->num_firstvertex, normal);
+               // skip backfaces
+               if (DotProduct(t->dist, normal) > 0)
+                       continue;
+               // iterate edges and see if the point is outside one of them
+               for (j = 0, k = surface->num_vertices - 1;j < surface->num_vertices;k = j, j++)
+               {
+                       VectorCopy(model->surfmesh.data_vertex3f + 3 * (surface->num_firstvertex + k), v0);
+                       VectorCopy(model->surfmesh.data_vertex3f + 3 * (surface->num_firstvertex + j), v1);
+                       VectorSubtract(v0, v1, edgedir);
+                       CrossProduct(edgedir, normal, edgenormal);
+                       if (DotProduct(edgenormal, p) > DotProduct(edgenormal, v0))
+                               break;
+               }
+               // if the point is outside one of the edges, it is not within the surface
+               if (j < surface->num_vertices)
+                       continue;
+
+               // we hit a surface, this is the impact point...
+               VectorCopy(normal, t->trace->plane.normal);
+               t->trace->plane.dist = DotProduct(normal, p);
+
+               // calculate the true fraction
+               t1 = DotProduct(t->start, t->trace->plane.normal) - t->trace->plane.dist;
+               t2 = DotProduct(t->end, t->trace->plane.normal) - t->trace->plane.dist;
+               midf = t1 / (t1 - t2);
+               t->trace->realfraction = midf;
+
+               // calculate the return fraction which is nudged off the surface a bit
+               midf = (t1 - DIST_EPSILON) / (t1 - t2);
+               t->trace->fraction = bound(0, midf, 1);
+
+               if (collision_prefernudgedfraction.integer)
+                       t->trace->realfraction = t->trace->fraction;
+
+               t->trace->hittexture = surface->texture->currentframe;
+               t->trace->hitq3surfaceflags = t->trace->hittexture->surfaceflags;
+               t->trace->hitsupercontents = t->trace->hittexture->supercontents;
+               return surface->texture->currentframe;
+       }
+       return NULL;
+}
+
+static int Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(RecursiveHullCheckTraceInfo_t *t, const dp_model_t *model, const mnode_t *node, const double p1[3], const double p2[3])
+{
+       const mplane_t *plane;
+       double t1, t2;
+       int side;
+       double midf, mid[3];
+       const mleaf_t *leaf;
+
+       while (node->plane)
+       {
+               plane = node->plane;
+               if (plane->type < 3)
+               {
+                       t1 = p1[plane->type] - plane->dist;
+                       t2 = p2[plane->type] - plane->dist;
+               }
+               else
+               {
+                       t1 = DotProduct (plane->normal, p1) - plane->dist;
+                       t2 = DotProduct (plane->normal, p2) - plane->dist;
+               }
+               if (t1 < 0)
+               {
+                       if (t2 < 0)
+                       {
+                               node = node->children[1];
+                               continue;
+                       }
+                       side = 1;
+               }
+               else
+               {
+                       if (t2 >= 0)
+                       {
+                               node = node->children[0];
+                               continue;
+                       }
+                       side = 0;
+               }
+
+               // the line intersects, find intersection point
+               // LordHavoc: this uses the original trace for maximum accuracy
+               if (plane->type < 3)
+               {
+                       t1 = t->start[plane->type] - plane->dist;
+                       t2 = t->end[plane->type] - plane->dist;
+               }
+               else
+               {
+                       t1 = DotProduct (plane->normal, t->start) - plane->dist;
+                       t2 = DotProduct (plane->normal, t->end) - plane->dist;
+               }
+       
+               midf = t1 / (t1 - t2);
+               VectorMA(t->start, midf, t->dist, mid);
+
+               // recurse both sides, front side first, return if we hit a surface
+               if (Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(t, model, node->children[side], p1, mid) == HULLCHECKSTATE_DONE)
+                       return HULLCHECKSTATE_DONE;
+
+               // test each surface on the node
+               Mod_Q1BSP_TraceLineAgainstSurfacesFindTextureOnNode(t, model, node, mid);
+               if (t->trace->hittexture)
+                       return HULLCHECKSTATE_DONE;
+
+               // recurse back side
+               return Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(t, model, node->children[side ^ 1], mid, p2);
+       }
+       leaf = (const mleaf_t *)node;
+       side = Mod_Q1BSP_SuperContentsFromNativeContents(NULL, leaf->contents);
+       if (!t->trace->startfound)
+       {
+               t->trace->startfound = true;
+               t->trace->startsupercontents |= side;
+       }
+       if (side & SUPERCONTENTS_LIQUIDSMASK)
+               t->trace->inwater = true;
+       if (side == 0)
+               t->trace->inopen = true;
+       if (side & t->trace->hitsupercontentsmask)
+       {
+               // if the first leaf is solid, set startsolid
+               if (t->trace->allsolid)
+                       t->trace->startsolid = true;
+               return HULLCHECKSTATE_SOLID;
+       }
+       else
+       {
+               t->trace->allsolid = false;
+               return HULLCHECKSTATE_EMPTY;
+       }
+}
+
+static void Mod_Q1BSP_TraceLineAgainstSurfaces(struct model_s *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask)
+{
+       RecursiveHullCheckTraceInfo_t rhc;
+
+       memset(&rhc, 0, sizeof(rhc));
+       memset(trace, 0, sizeof(trace_t));
+       rhc.trace = trace;
+       rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
+       rhc.trace->fraction = 1;
+       rhc.trace->realfraction = 1;
+       rhc.trace->allsolid = true;
+       rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
+       VectorCopy(start, rhc.start);
+       VectorCopy(end, rhc.end);
+       VectorSubtract(rhc.end, rhc.start, rhc.dist);
+       Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(&rhc, model, model->brush.data_nodes + rhc.hull->firstclipnode, rhc.start, rhc.end);
+       VectorMA(rhc.start, rhc.trace->fraction, rhc.dist, rhc.trace->endpos);
+}
+
 static void Mod_Q1BSP_DecompressVis(const unsigned char *in, const unsigned char *inend, unsigned char *out, unsigned char *outend)
 {
        int c;
@@ -3449,6 +3633,8 @@ static int Mod_Q1BSP_CreateShadowMesh(dp_model_t *mod)
        return numshadowmeshtriangles;
 }
 
+void Mod_CollisionBIH_TraceLineAgainstSurfaces(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask);
+
 void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
 {
        int i, j, k;
@@ -3506,9 +3692,10 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
 
        mod->soundfromcenter = true;
        mod->TraceBox = Mod_Q1BSP_TraceBox;
-       mod->TraceLine = Mod_Q1BSP_TraceLine;
+       mod->TraceLine = Mod_Q1BSP_TraceLineAgainstSurfaces; // LordHavoc: use the surface-hitting version of TraceLine in all cases
        mod->TracePoint = Mod_Q1BSP_TracePoint;
        mod->PointSuperContents = Mod_Q1BSP_PointSuperContents;
+       mod->TraceLineAgainstSurfaces = Mod_Q1BSP_TraceLineAgainstSurfaces;
        mod->brush.TraceLineOfSight = Mod_Q1BSP_TraceLineOfSight;
        mod->brush.SuperContentsFromNativeContents = Mod_Q1BSP_SuperContentsFromNativeContents;
        mod->brush.NativeContentsFromSuperContents = Mod_Q1BSP_NativeContentsFromSuperContents;
@@ -3770,6 +3957,7 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
                        mod->TraceLine = Mod_CollisionBIH_TraceLine;
                        mod->TraceBox = Mod_CollisionBIH_TraceBox;
                        mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
+                       mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLineAgainstSurfaces;
                }
 
                // generate VBOs and other shared data before cloning submodels
@@ -5628,14 +5816,26 @@ static void Mod_Q3BSP_LoadPVS(lump_t *l)
 static void Mod_Q3BSP_LightPoint(dp_model_t *model, const vec3_t p, vec3_t ambientcolor, vec3_t diffusecolor, vec3_t diffusenormal)
 {
        int i, j, k, index[3];
-       float transformed[3], blend1, blend2, blend, stylescale;
+       float transformed[3], blend1, blend2, blend, stylescale = 1;
        q3dlightgrid_t *a, *s;
 
        // scale lighting by lightstyle[0] so that darkmode in dpmod works properly
-       if (vid.renderpath == RENDERPATH_GL20)
+       switch(vid.renderpath)
+       {
+       case RENDERPATH_GL20:
+       case RENDERPATH_D3D9:
+       case RENDERPATH_D3D10:
+       case RENDERPATH_D3D11:
+       case RENDERPATH_SOFT:
+       case RENDERPATH_GLES2:
+               // LordHavoc: FIXME: is this true?
                stylescale = 1; // added while render
-       else
+               break;
+       case RENDERPATH_GL11:
+       case RENDERPATH_GL13:
                stylescale = r_refdef.scene.rtlightstylevalue[0];
+               break;
+       }
 
        if (!model->brushq3.num_lightgrid)
        {
@@ -5780,6 +5980,31 @@ static void Mod_CollisionBIH_TracePoint_RecursiveBIHNode(trace_t *trace, dp_mode
        while (nodenum >= 0)
        {
                node = model->collision_bih.nodes + nodenum;
+               if (node->type == BIH_UNORDERED)
+               {
+                       for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
+                       {
+                               leaf = model->collision_bih.leafs + node->children[axis];
+#if 1
+                               if (!BoxesOverlap(point, point, leaf->mins, leaf->maxs))
+                                       continue;
+#endif
+                               switch(leaf->type)
+                               {
+                               case BIH_BRUSH:
+                                       brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
+                                       Collision_TracePointBrushFloat(trace, point, brush);
+                                       break;
+                               case BIH_COLLISIONTRIANGLE:
+                                       // collision triangle - skipped because they have no volume
+                                       break;
+                               case BIH_RENDERTRIANGLE:
+                                       // render triangle - skipped because they have no volume
+                                       break;
+                               }
+                       }
+                       return;
+               }
                axis = node->type - BIH_SPLITX;
                if (point[axis] <= node->backmax)
                {
@@ -5795,6 +6020,10 @@ static void Mod_CollisionBIH_TracePoint_RecursiveBIHNode(trace_t *trace, dp_mode
        if (!model->collision_bih.leafs)
                return;
        leaf = model->collision_bih.leafs + (-1-nodenum);
+#if 1
+       if (!BoxesOverlap(point, point, leaf->mins, leaf->maxs))
+               return;
+#endif
        switch(leaf->type)
        {
        case BIH_BRUSH:
@@ -5810,7 +6039,7 @@ static void Mod_CollisionBIH_TracePoint_RecursiveBIHNode(trace_t *trace, dp_mode
        }
 }
 
-static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model_t *model, int nodenum, const vec3_t start, const vec3_t end, const vec3_t linestart, const vec3_t lineend)
+static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model_t *model, bih_t *bih, int nodenum, const vec3_t start, const vec3_t end, const vec3_t linestart, const vec3_t lineend)
 {
        const bih_leaf_t *leaf;
        const bih_node_t *node;
@@ -5839,17 +6068,48 @@ static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model
        segmentmaxs[2] = max(start[2], end[2]);
        while (nodenum >= 0)
        {
-               node = model->collision_bih.nodes + nodenum;
+               node = bih->nodes + nodenum;
 #if 0
                if (!BoxesOverlap(segmentmins, segmentmaxs, node->mins, node->maxs))
                        return;
 #endif
+               if (node->type == BIH_UNORDERED)
+               {
+                       for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
+                       {
+                               leaf = model->collision_bih.leafs + node->children[axis];
+#if 1
+                               if (!BoxesOverlap(segmentmins, segmentmaxs, leaf->mins, leaf->maxs))
+                                       continue;
+#endif
+                               switch(leaf->type)
+                               {
+                               case BIH_BRUSH:
+                                       brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
+                                       Collision_TraceLineBrushFloat(trace, linestart, lineend, brush, brush);
+                                       break;
+                               case BIH_COLLISIONTRIANGLE:
+                                       if (!mod_q3bsp_curves_collisions.integer)
+                                               continue;
+                                       e = model->brush.data_collisionelement3i + 3*leaf->itemindex;
+                                       texture = model->data_textures + leaf->textureindex;
+                                       Collision_TraceLineTriangleFloat(trace, linestart, lineend, model->brush.data_collisionvertex3f + e[0] * 3, model->brush.data_collisionvertex3f + e[1] * 3, model->brush.data_collisionvertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
+                                       break;
+                               case BIH_RENDERTRIANGLE:
+                                       e = model->surfmesh.data_element3i + 3*leaf->itemindex;
+                                       texture = model->data_textures + leaf->textureindex;
+                                       Collision_TraceLineTriangleFloat(trace, linestart, lineend, model->surfmesh.data_vertex3f + e[0] * 3, model->surfmesh.data_vertex3f + e[1] * 3, model->surfmesh.data_vertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
+                                       break;
+                               }
+                       }
+                       return;
+               }
                axis = node->type - BIH_SPLITX;
 #if 0
                if (segmentmins[axis] <= node->backmax)
                {
                        if (segmentmaxs[axis] >= node->frontmin)
-                               Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
+                               Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, bih, node->front, start, end, linestart, lineend);
                        nodenum = node->back;
                }
                else if (segmentmaxs[axis] >= node->frontmin)
@@ -5874,7 +6134,7 @@ static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model
                if (sideflags & 12)
                {
                        if ((sideflags & 3) != 3)
-                               Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
+                               Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, bih, node->front, start, end, linestart, lineend);
                        nodenum = node->back;
                }
                else if ((sideflags & 3) != 3)
@@ -5921,7 +6181,7 @@ static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model
                        return; // line falls in gap between children
                case 4:
                        // start end start END
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
+                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, bih, node->front, start, end, linestart, lineend);
 #ifdef BIHLINECLIP
                        backfrac = backdist1 / (backdist1 - backdist2);
                        VectorLerp(start, backfrac, end, newend); end = newend;
@@ -5939,7 +6199,7 @@ static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model
 #ifdef BIHLINECLIP
                        frontfrac = frontdist1 / (frontdist1 - frontdist2);
                        VectorLerp(start, frontfrac, end, clipped);
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, clipped, end, linestart, lineend);
+                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, bih, node->front, clipped, end, linestart, lineend);
                        backfrac = backdist1 / (backdist1 - backdist2);
                        VectorLerp(start, backfrac, end, newend); end = newend;
                        segmentmins[0] = min(start[0], end[0]);
@@ -5949,7 +6209,7 @@ static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model
                        segmentmaxs[1] = max(start[1], end[1]);
                        segmentmaxs[2] = max(start[2], end[2]);
 #else
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
+                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, bih, node->front, start, end, linestart, lineend);
 #endif
                        nodenum = node->back;
                        break;
@@ -5958,7 +6218,7 @@ static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model
 #ifdef BIHLINECLIP
                        frontfrac = frontdist1 / (frontdist1 - frontdist2);
                        VectorLerp(start, frontfrac, end, clipped);
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, clipped, linestart, lineend);
+                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, bih, node->front, start, clipped, linestart, lineend);
                        backfrac = backdist1 / (backdist1 - backdist2);
                        VectorLerp(start, backfrac, end, newend); end = newend;
                        segmentmins[0] = min(start[0], end[0]);
@@ -5968,7 +6228,7 @@ static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model
                        segmentmaxs[1] = max(start[1], end[1]);
                        segmentmaxs[2] = max(start[2], end[2]);
 #else
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
+                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, bih, node->front, start, end, linestart, lineend);
 #endif
                        nodenum = node->back;
                        break;
@@ -5988,7 +6248,7 @@ static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model
                        break;
                case 8:
                        // start end START end
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
+                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, bih, node->front, start, end, linestart, lineend);
 #ifdef BIHLINECLIP
                        backfrac = backdist1 / (backdist1 - backdist2);
                        VectorLerp(start, backfrac, end, newstart); start = newstart;
@@ -6006,7 +6266,7 @@ static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model
 #ifdef BIHLINECLIP
                        frontfrac = frontdist1 / (frontdist1 - frontdist2);
                        VectorLerp(start, frontfrac, end, clipped);
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, clipped, end, linestart, lineend);
+                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, bih, node->front, clipped, end, linestart, lineend);
                        backfrac = backdist1 / (backdist1 - backdist2);
                        VectorLerp(start, backfrac, end, newstart); start = newstart;
                        segmentmins[0] = min(start[0], end[0]);
@@ -6016,7 +6276,7 @@ static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model
                        segmentmaxs[1] = max(start[1], end[1]);
                        segmentmaxs[2] = max(start[2], end[2]);
 #else
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
+                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, bih, node->front, start, end, linestart, lineend);
 #endif
                        nodenum = node->back;
                        break;
@@ -6025,7 +6285,7 @@ static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model
 #ifdef BIHLINECLIP
                        frontfrac = frontdist1 / (frontdist1 - frontdist2);
                        VectorLerp(start, frontfrac, end, clipped);
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, clipped, linestart, lineend);
+                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, bih, node->front, start, clipped, linestart, lineend);
                        backfrac = backdist1 / (backdist1 - backdist2);
                        VectorLerp(start, backfrac, end, newstart); start = newstart;
                        segmentmins[0] = min(start[0], end[0]);
@@ -6035,7 +6295,7 @@ static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model
                        segmentmaxs[1] = max(start[1], end[1]);
                        segmentmaxs[2] = max(start[2], end[2]);
 #else
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
+                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, bih, node->front, start, end, linestart, lineend);
 #endif
                        nodenum = node->back;
                        break;
@@ -6055,7 +6315,7 @@ static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model
                        break;
                case 12:
                        // start end start end
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
+                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, bih, node->front, start, end, linestart, lineend);
                        nodenum = node->back;
                        break;
                case 13:
@@ -6063,9 +6323,9 @@ static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model
 #ifdef BIHLINECLIP
                        frontfrac = frontdist1 / (frontdist1 - frontdist2);
                        VectorLerp(start, frontfrac, end, clipped);
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, clipped, end, linestart, lineend);
+                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, bih, node->front, clipped, end, linestart, lineend);
 #else
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
+                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, bih, node->front, start, end, linestart, lineend);
 #endif
                        nodenum = node->back;
                        break;
@@ -6074,9 +6334,9 @@ static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model
 #ifdef BIHLINECLIP
                        frontfrac = frontdist1 / (frontdist1 - frontdist2);
                        VectorLerp(start, frontfrac, end, clipped);
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, clipped, linestart, lineend);
+                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, bih, node->front, start, clipped, linestart, lineend);
 #else
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
+                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, bih, node->front, start, end, linestart, lineend);
 #endif
                        nodenum = node->back;
                        break;
@@ -6088,9 +6348,9 @@ static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model
 #endif
 #endif
        }
-       if (!model->collision_bih.leafs)
+       if (!bih->leafs)
                return;
-       leaf = model->collision_bih.leafs + (-1-nodenum);
+       leaf = bih->leafs + (-1-nodenum);
 #if 1
        if (!BoxesOverlap(segmentmins, segmentmaxs, leaf->mins, leaf->maxs))
                return;
@@ -6127,6 +6387,37 @@ static void Mod_CollisionBIH_TraceBrush_RecursiveBIHNode(trace_t *trace, dp_mode
        while (nodenum >= 0)
        {
                node = model->collision_bih.nodes + nodenum;
+               if (node->type == BIH_UNORDERED)
+               {
+                       for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
+                       {
+                               leaf = model->collision_bih.leafs + node->children[axis];
+#if 1
+                               if (!BoxesOverlap(segmentmins, segmentmaxs, leaf->mins, leaf->maxs))
+                                       continue;
+#endif
+                               switch(leaf->type)
+                               {
+                               case BIH_BRUSH:
+                                       brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
+                                       Collision_TraceBrushBrushFloat(trace, thisbrush_start, thisbrush_end, brush, brush);
+                                       break;
+                               case BIH_COLLISIONTRIANGLE:
+                                       if (!mod_q3bsp_curves_collisions.integer)
+                                               continue;
+                                       e = model->brush.data_collisionelement3i + 3*leaf->itemindex;
+                                       texture = model->data_textures + leaf->textureindex;
+                                       Collision_TraceBrushTriangleFloat(trace, thisbrush_start, thisbrush_end, model->brush.data_collisionvertex3f + e[0] * 3, model->brush.data_collisionvertex3f + e[1] * 3, model->brush.data_collisionvertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
+                                       break;
+                               case BIH_RENDERTRIANGLE:
+                                       e = model->surfmesh.data_element3i + 3*leaf->itemindex;
+                                       texture = model->data_textures + leaf->textureindex;
+                                       Collision_TraceBrushTriangleFloat(trace, thisbrush_start, thisbrush_end, model->surfmesh.data_vertex3f + e[0] * 3, model->surfmesh.data_vertex3f + e[1] * 3, model->surfmesh.data_vertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
+                                       break;
+                               }
+                       }
+                       return;
+               }
                axis = node->type - BIH_SPLITX;
 #if 1
                if (!BoxesOverlap(segmentmins, segmentmaxs, node->mins, node->maxs))
@@ -6197,7 +6488,7 @@ void Mod_CollisionBIH_TraceLine(dp_model_t *model, const frameblend_t *frameblen
        trace->fraction = 1;
        trace->realfraction = 1;
        trace->hitsupercontentsmask = hitsupercontentsmask;
-       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, model->collision_bih.rootnode, start, end, start, end);
+       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, &model->collision_bih, model->collision_bih.rootnode, start, end, start, end);
 }
 
 void Mod_CollisionBIH_TraceBox(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t boxmins, const vec3_t boxmaxs, const vec3_t end, int hitsupercontentsmask)
@@ -6572,7 +6863,7 @@ static void Mod_Q3BSP_TraceLine(dp_model_t *model, const frameblend_t *frameblen
        segmentmaxs[1] = max(start[1], end[1]) + 1;
        segmentmaxs[2] = max(start[2], end[2]) + 1;
        if (mod_collision_bih.integer)
-               Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, model->collision_bih.rootnode, start, end, start, end);
+               Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, &model->collision_bih, model->collision_bih.rootnode, start, end, start, end);
        else if (model->brush.submodel)
        {
                for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
@@ -6722,6 +7013,16 @@ static int Mod_Q3BSP_PointSuperContents(struct model_s *model, int frame, const
        return supercontents;
 }
 
+void Mod_CollisionBIH_TraceLineAgainstSurfaces(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask)
+{
+       memset(trace, 0, sizeof(*trace));
+       trace->fraction = 1;
+       trace->realfraction = 1;
+       trace->hitsupercontentsmask = hitsupercontentsmask;
+       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, &model->render_bih, model->render_bih.rootnode, start, end, start, end);
+}
+
+
 bih_t *Mod_MakeCollisionBIH(dp_model_t *model, qboolean userendersurfaces, bih_t *out)
 {
        int j;
@@ -6842,7 +7143,7 @@ bih_t *Mod_MakeCollisionBIH(dp_model_t *model, qboolean userendersurfaces, bih_t
        temp_leafsortscratch = temp_leafsort + bihnumleafs;
 
        // now build it
-       BIH_Build(out, bihnumleafs, bihleafs, bihmaxnodes, bihnodes, temp_leafsort, temp_leafsortscratch);
+       BIH_Build(out, bihnumleafs, bihleafs, bihmaxnodes, bihnodes, temp_leafsort, temp_leafsortscratch, mod_collision_bih_childrengrouping.integer);
 
        // we're done with the temporary data
        Mem_Free(temp_leafsort);
@@ -6956,6 +7257,7 @@ void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        mod->TraceLine = Mod_Q3BSP_TraceLine;
        mod->TracePoint = Mod_Q3BSP_TracePoint;
        mod->PointSuperContents = Mod_Q3BSP_PointSuperContents;
+       mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
        mod->brush.TraceLineOfSight = Mod_Q3BSP_TraceLineOfSight;
        mod->brush.SuperContentsFromNativeContents = Mod_Q3BSP_SuperContentsFromNativeContents;
        mod->brush.NativeContentsFromSuperContents = Mod_Q3BSP_NativeContentsFromSuperContents;
@@ -7254,6 +7556,7 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        loadmodel->TraceBrush = Mod_CollisionBIH_TraceBrush;
        loadmodel->TraceLine = Mod_CollisionBIH_TraceLine;
        loadmodel->TracePoint = Mod_CollisionBIH_TracePoint_Mesh;
+       loadmodel->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
        loadmodel->PointSuperContents = Mod_CollisionBIH_PointSuperContents_Mesh;
        loadmodel->brush.TraceLineOfSight = NULL;
        loadmodel->brush.SuperContentsFromNativeContents = NULL;
@@ -8244,6 +8547,7 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        loadmodel->TraceLine = Mod_OBJ_TraceLine;
        loadmodel->TracePoint = Mod_OBJ_TracePoint;
        loadmodel->PointSuperContents = Mod_OBJ_PointSuperContents;
+       loadmodel->TraceLineAgainstSurfaces = Mod_OBJ_TraceLineAgainstSurfaces;
        loadmodel->brush.TraceLineOfSight = Mod_OBJ_TraceLineOfSight;
        loadmodel->brush.SuperContentsFromNativeContents = Mod_OBJ_SuperContentsFromNativeContents;
        loadmodel->brush.NativeContentsFromSuperContents = Mod_OBJ_NativeContentsFromSuperContents;