]> git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - model_brush.c
fixed surface traceline code, bouncegrid looks a lot better now
[xonotic/darkplaces.git] / model_brush.c
index 0a68d6051a9aa02e4cf92358f032487f15390afa..7a16f6d7f6942cfc1b82000d5a92efdbb3f93b81 100644 (file)
@@ -27,6 +27,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 
 //cvar_t r_subdivide_size = {CVAR_SAVE, "r_subdivide_size", "128", "how large water polygons should be (smaller values produce more polygons which give better warping effects)"};
+cvar_t mod_bsp_portalize = {0, "mod_bsp_portalize", "1", "enables portal generation from BSP tree (may take several seconds per map), used by r_drawportals, r_useportalculling, r_shadow_realtime_world_compileportalculling, sv_cullentities_portal"};
 cvar_t r_novis = {0, "r_novis", "0", "draws whole level, see also sv_cullentities_pvs 0"};
 cvar_t r_nosurftextures = {0, "r_nosurftextures", "0", "pretends there was no texture lump found in the q1bsp/hlbsp loading (useful for debugging this rare case)"};
 cvar_t r_subdivisions_tolerance = {0, "r_subdivisions_tolerance", "4", "maximum error tolerance on curve subdivision for rendering purposes (in other words, the curves will be given as many polygons as necessary to represent curves at this quality)"};
@@ -62,6 +63,7 @@ static texture_t mod_q1bsp_texture_water;
 void Mod_BrushInit(void)
 {
 //     Cvar_RegisterVariable(&r_subdivide_size);
+       Cvar_RegisterVariable(&mod_bsp_portalize);
        Cvar_RegisterVariable(&r_novis);
        Cvar_RegisterVariable(&r_nosurftextures);
        Cvar_RegisterVariable(&r_subdivisions_tolerance);
@@ -1291,6 +1293,190 @@ 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;
+       int axis = node->plane->type;
+       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++)
+       {
+               if (axis < 3)
+               {
+                       if (mid[axis] < surface->mins[axis] || mid[axis] > surface->maxs[axis])
+                               continue;
+               }
+               else
+               {
+                       if (!BoxesOverlap(mid, mid, surface->mins, surface->maxs))
+                               continue;
+               }
+               if (!(t->trace->hitsupercontentsmask & surface->texture->supercontents))
+                       continue;
+               VectorCopy(model->surfmesh.data_normal3f + 3 * surface->num_firstvertex, normal);
+               //VectorCopy(node->plane->normal, normal);
+               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 (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;
@@ -2343,8 +2529,8 @@ static void Mod_Q1BSP_LoadFaces(lump_t *l)
                }
 
                // compile additional data about the surface geometry
-               Mod_BuildNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, loadmodel->surfmesh.data_vertex3f, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle), loadmodel->surfmesh.data_normal3f, true);
-               Mod_BuildTextureVectorsFromNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle), loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, true);
+               Mod_BuildNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, loadmodel->surfmesh.data_vertex3f, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle), loadmodel->surfmesh.data_normal3f, r_smoothnormals_areaweighting.integer != 0);
+               Mod_BuildTextureVectorsFromNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle), loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
                BoxFromPoints(surface->mins, surface->maxs, surface->num_vertices, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex));
 
                // generate surface extents information
@@ -2563,6 +2749,8 @@ static void Mod_Q1BSP_LoadNodes(lump_t *l)
        if (l->filelen % sizeof(*in))
                Host_Error("Mod_Q1BSP_LoadNodes: funny lump size in %s",loadmodel->name);
        count = l->filelen / sizeof(*in);
+       if (count == 0)
+               Host_Error("Mod_Q1BSP_LoadNodes: missing BSP tree in %s",loadmodel->name);
        out = (mnode_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
 
        loadmodel->brush.data_nodes = out;
@@ -3438,13 +3626,15 @@ static int Mod_Q1BSP_CreateShadowMesh(dp_model_t *mod)
        for (j = 0, surface = mod->data_surfaces;j < mod->num_surfaces;j++, surface++)
                if (surface->num_triangles > 0)
                        Mod_ShadowMesh_AddMesh(mod->mempool, mod->brush.shadowmesh, NULL, NULL, NULL, mod->surfmesh.data_vertex3f, NULL, NULL, NULL, NULL, surface->num_triangles, (mod->surfmesh.data_element3i + 3 * surface->num_firsttriangle));
-       mod->brush.shadowmesh = Mod_ShadowMesh_Finish(mod->mempool, mod->brush.shadowmesh, false, true, false);
-       if (mod->brush.shadowmesh)
+       mod->brush.shadowmesh = Mod_ShadowMesh_Finish(mod->mempool, mod->brush.shadowmesh, false, r_enableshadowvolumes.integer != 0, false);
+       if (mod->brush.shadowmesh && mod->brush.shadowmesh->neighbor3i)
                Mod_BuildTriangleNeighbors(mod->brush.shadowmesh->neighbor3i, mod->brush.shadowmesh->element3i, mod->brush.shadowmesh->numtriangles);
 
        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;
@@ -3502,9 +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;
@@ -3573,7 +3764,8 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        mod->brushq1.num_compressedpvs = 0;
 
        Mod_Q1BSP_MakeHull0();
-       Mod_Q1BSP_MakePortals();
+       if (mod_bsp_portalize.integer)
+               Mod_Q1BSP_MakePortals();
 
        mod->numframes = 2;             // regular and alternate animation
        mod->numskins = 1;
@@ -3755,16 +3947,18 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
                }
                //mod->brushq1.num_visleafs = bm->visleafs;
 
+               // build a Bounding Interval Hierarchy for culling triangles in light rendering
+               Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
+
                if (mod_q1bsp_polygoncollisions.integer)
                {
-                       Mod_MakeCollisionBIH(mod, true, &mod->collision_bih);
+                       mod->collision_bih = mod->render_bih;
                        // point traces and contents checks still use the bsp tree
                        mod->TraceLine = Mod_CollisionBIH_TraceLine;
                        mod->TraceBox = Mod_CollisionBIH_TraceBox;
                        mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
+                       mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLineAgainstSurfaces;
                }
-               else
-                       Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
 
                // generate VBOs and other shared data before cloning submodels
                if (i == 0)
@@ -5319,13 +5513,20 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                if(out->num_vertices && out->num_triangles)
                        continue;
                if(out->num_vertices == 0)
-                       Con_Printf("Mod_Q3BSP_LoadFaces: surface %d has no vertices, ignoring\n", i);
-               if(out->num_triangles == 0)
-                       Con_Printf("Mod_Q3BSP_LoadFaces: surface %d has no triangles, ignoring\n", i);
+               {
+                       Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s) has no vertices, ignoring\n", i, out->texture ? out->texture->name : "(none)");
+                       if(out->num_triangles == 0)
+                               Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s) has no triangles, ignoring\n", i, out->texture ? out->texture->name : "(none)");
+               }
+               else if(out->num_triangles == 0)
+                       Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s, near %f %f %f) has no triangles, ignoring\n", i, out->texture ? out->texture->name : "(none)",
+                                       (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[0 * 3 + 0],
+                                       (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[1 * 3 + 0],
+                                       (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[2 * 3 + 0]);
        }
 
        // for per pixel lighting
-       Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, true);
+       Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
 
        // generate ushort elements array if possible
        if (loadmodel->surfmesh.data_element3s)
@@ -5488,6 +5689,8 @@ static void Mod_Q3BSP_LoadNodes(lump_t *l)
        if (l->filelen % sizeof(*in))
                Host_Error("Mod_Q3BSP_LoadNodes: funny lump size in %s",loadmodel->name);
        count = l->filelen / sizeof(*in);
+       if (count == 0)
+               Host_Error("Mod_Q3BSP_LoadNodes: missing BSP tree in %s",loadmodel->name);
        out = (mnode_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
 
        loadmodel->brush.data_nodes = out;
@@ -5613,14 +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)
        {
@@ -5795,7 +6010,7 @@ 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;
@@ -5824,7 +6039,7 @@ 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;
@@ -5834,7 +6049,7 @@ static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model
                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)
@@ -5859,7 +6074,7 @@ 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)
@@ -5906,7 +6121,7 @@ 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;
@@ -5924,7 +6139,7 @@ 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]);
@@ -5934,7 +6149,7 @@ 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;
@@ -5943,7 +6158,7 @@ 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]);
@@ -5953,7 +6168,7 @@ 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;
@@ -5973,7 +6188,7 @@ 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;
@@ -5991,7 +6206,7 @@ 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]);
@@ -6001,7 +6216,7 @@ 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;
@@ -6010,7 +6225,7 @@ 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]);
@@ -6020,7 +6235,7 @@ 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;
@@ -6040,7 +6255,7 @@ 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:
@@ -6048,9 +6263,9 @@ 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;
@@ -6059,9 +6274,9 @@ 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;
@@ -6073,9 +6288,9 @@ 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;
@@ -6182,7 +6397,7 @@ 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)
@@ -6557,7 +6772,7 @@ 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++)
@@ -6707,6 +6922,16 @@ 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;
@@ -6941,6 +7166,7 @@ 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_TraceLineAgainstSurfaces;
        mod->brush.TraceLineOfSight = Mod_Q3BSP_TraceLineOfSight;
        mod->brush.SuperContentsFromNativeContents = Mod_Q3BSP_SuperContentsFromNativeContents;
        mod->brush.NativeContentsFromSuperContents = Mod_Q3BSP_NativeContentsFromSuperContents;
@@ -7032,7 +7258,8 @@ void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        loadmodel->brush.numsubmodels = loadmodel->brushq3.num_models;
 
        // the MakePortals code works fine on the q3bsp data as well
-       Mod_Q1BSP_MakePortals();
+       if (mod_bsp_portalize.integer)
+               Mod_Q1BSP_MakePortals();
 
        // FIXME: shader alpha should replace r_wateralpha support in q3bsp
        loadmodel->brush.supportwateralpha = true;
@@ -7238,6 +7465,7 @@ 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_TraceLineAgainstSurfaces;
        loadmodel->PointSuperContents = Mod_CollisionBIH_PointSuperContents_Mesh;
        loadmodel->brush.TraceLineOfSight = NULL;
        loadmodel->brush.SuperContentsFromNativeContents = NULL;
@@ -7567,13 +7795,14 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        // allocate storage for final mesh data
        loadmodel->num_textures = numtextures * loadmodel->numskins;
        loadmodel->num_texturesperskin = numtextures;
-       data = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * sizeof(int) + loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t) + numtriangles * sizeof(int[3]) + (numvertices <= 65536 ? numtriangles * sizeof(unsigned short[3]) : 0) + numvertices * sizeof(float[14]) + loadmodel->brush.numsubmodels * sizeof(dp_model_t *));
+       data = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * sizeof(int) + loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t) + numtriangles * sizeof(int[3]) + (numvertices <= 65536 ? numtriangles * sizeof(unsigned short[3]) : 0) + (r_enableshadowvolumes.integer ? numtriangles * sizeof(int[3]) : 0) + numvertices * sizeof(float[14]) + loadmodel->brush.numsubmodels * sizeof(dp_model_t *));
        loadmodel->brush.submodels = (dp_model_t **)data;data += loadmodel->brush.numsubmodels * sizeof(dp_model_t *);
        loadmodel->sortedmodelsurfaces = (int *)data;data += loadmodel->num_surfaces * sizeof(int);
        loadmodel->data_textures = (texture_t *)data;data += loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t);
        loadmodel->surfmesh.num_vertices = numvertices;
        loadmodel->surfmesh.num_triangles = numtriangles;
-       loadmodel->surfmesh.data_neighbor3i = (int *)data;data += numtriangles * sizeof(int[3]);
+       if (r_enableshadowvolumes.integer)
+               loadmodel->surfmesh.data_neighbor3i = (int *)data;data += numtriangles * sizeof(int[3]);
        loadmodel->surfmesh.data_vertex3f = (float *)data;data += numvertices * sizeof(float[3]);
        loadmodel->surfmesh.data_svector3f = (float *)data;data += numvertices * sizeof(float[3]);
        loadmodel->surfmesh.data_tvector3f = (float *)data;data += numvertices * sizeof(float[3]);
@@ -7617,9 +7846,10 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        Mod_ValidateElements(loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.num_triangles, 0, loadmodel->surfmesh.num_vertices, __FILE__, __LINE__);
        // generate normals if the file did not have them
        if (!VectorLength2(loadmodel->surfmesh.data_normal3f))
-               Mod_BuildNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_normal3f, true);
-       Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, true);
-       Mod_BuildTriangleNeighbors(loadmodel->surfmesh.data_neighbor3i, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.num_triangles);
+               Mod_BuildNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_normal3f, r_smoothnormals_areaweighting.integer != 0);
+       Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
+       if (loadmodel->surfmesh.data_neighbor3i)
+               Mod_BuildTriangleNeighbors(loadmodel->surfmesh.data_neighbor3i, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.num_triangles);
 
        // if this is a worldmodel and has no BSP tree, create a fake one for the purpose
        loadmodel->brush.num_visleafs = 1;
@@ -8226,6 +8456,7 @@ 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;
@@ -8519,14 +8750,15 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
 
        loadmodel->num_surfaces = 1;
        loadmodel->nummodelsurfaces = loadmodel->num_surfaces;
-       data = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * sizeof(msurface_t) + loadmodel->num_surfaces * sizeof(int) + loadmodel->numframes * sizeof(animscene_t) + loadmodel->numframes * sizeof(float[6]) + loadmodel->surfmesh.num_triangles * sizeof(int[3]) + loadmodel->surfmesh.num_triangles * sizeof(int[3]));
+       data = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * sizeof(msurface_t) + loadmodel->num_surfaces * sizeof(int) + loadmodel->numframes * sizeof(animscene_t) + loadmodel->numframes * sizeof(float[6]) + loadmodel->surfmesh.num_triangles * sizeof(int[3]) + (r_enableshadowvolume.integer ? loadmodel->surfmesh.num_triangles * sizeof(int[3]) : 0));
        loadmodel->data_surfaces = (msurface_t *)data;data += loadmodel->num_surfaces * sizeof(msurface_t);
        loadmodel->sortedmodelsurfaces = (int *)data;data += loadmodel->num_surfaces * sizeof(int);
        loadmodel->sortedmodelsurfaces[0] = 0;
        loadmodel->animscenes = (animscene_t *)data;data += loadmodel->numframes * sizeof(animscene_t);
        loadmodel->surfmesh.data_morphmd2framesize6f = (float *)data;data += loadmodel->numframes * sizeof(float[6]);
        loadmodel->surfmesh.data_element3i = (int *)data;data += loadmodel->surfmesh.num_triangles * sizeof(int[3]);
-       loadmodel->surfmesh.data_neighbor3i = (int *)data;data += loadmodel->surfmesh.num_triangles * sizeof(int[3]);
+       if (r_enableshadowvolumes.integer)
+               loadmodel->surfmesh.data_neighbor3i = (int *)data;data += loadmodel->surfmesh.num_triangles * sizeof(int[3]);
 
        loadmodel->synctype = ST_RAND;
 
@@ -8668,7 +8900,8 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        Mem_Free(vertremap);
 
        Mod_MakeSortedSurfaces(loadmodel);
-       Mod_BuildTriangleNeighbors(loadmodel->surfmesh.data_neighbor3i, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.num_triangles);
+       if (loadmodel->surfmesh.data_neighbor3i)
+               Mod_BuildTriangleNeighbors(loadmodel->surfmesh.data_neighbor3i, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.num_triangles);
        Mod_Alias_CalculateBoundingBox();
        Mod_Alias_MorphMesh_CompileFrames();