]> de.git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - model_shared.c
use dynamic eye position-centered bouncegrid when rendering in dynamic
[xonotic/darkplaces.git] / model_shared.c
index f5a4b4eac831436af99de877fe61c064d1faad72..52bf0ed84b874a4cef252ebce1aa15bda01ebcfe 100644 (file)
@@ -27,7 +27,9 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #include "r_shadow.h"
 #include "polygon.h"
 
+cvar_t r_enableshadowvolumes = {CVAR_SAVE, "r_enableshadowvolumes", "1", "Enables use of Stencil Shadow Volume shadowing methods, saves some memory if turned off"};
 cvar_t r_mipskins = {CVAR_SAVE, "r_mipskins", "0", "mipmaps model skins so they render faster in the distance and do not display noise artifacts, can cause discoloration of skins if they contain undesirable border colors"};
+cvar_t r_mipnormalmaps = {CVAR_SAVE, "r_mipnormalmaps", "1", "mipmaps normalmaps (turning it off looks sharper but may have aliasing)"};
 cvar_t mod_generatelightmaps_unitspersample = {CVAR_SAVE, "mod_generatelightmaps_unitspersample", "8", "lightmap resolution"};
 cvar_t mod_generatelightmaps_borderpixels = {CVAR_SAVE, "mod_generatelightmaps_borderpixels", "2", "extra space around polygons to prevent sampling artifacts"};
 cvar_t mod_generatelightmaps_texturesize = {CVAR_SAVE, "mod_generatelightmaps_texturesize", "1024", "size of lightmap textures"};
@@ -159,7 +161,9 @@ void Mod_Init (void)
        Mod_AliasInit();
        Mod_SpriteInit();
 
+       Cvar_RegisterVariable(&r_enableshadowvolumes);
        Cvar_RegisterVariable(&r_mipskins);
+       Cvar_RegisterVariable(&r_mipnormalmaps);
        Cvar_RegisterVariable(&mod_generatelightmaps_unitspersample);
        Cvar_RegisterVariable(&mod_generatelightmaps_borderpixels);
        Cvar_RegisterVariable(&mod_generatelightmaps_texturesize);
@@ -196,9 +200,9 @@ void Mod_UnloadModel (dp_model_t *mod)
        used = mod->used;
        if (mod->mempool)
        {
-               if (mod->surfmesh.vertexpositionbuffer)
-                       R_Mesh_DestroyMeshBuffer(mod->surfmesh.vertexpositionbuffer);
-               mod->surfmesh.vertexpositionbuffer = NULL;
+               if (mod->surfmesh.vertex3fbuffer)
+                       R_Mesh_DestroyMeshBuffer(mod->surfmesh.vertex3fbuffer);
+               mod->surfmesh.vertex3fbuffer = NULL;
                if (mod->surfmesh.vertexmeshbuffer)
                        R_Mesh_DestroyMeshBuffer(mod->surfmesh.vertexmeshbuffer);
                mod->surfmesh.vertexmeshbuffer = NULL;
@@ -1191,8 +1195,8 @@ static void Mod_ShadowMesh_CreateVBOs(shadowmesh_t *mesh, mempool_t *mempool)
                return;
 
        // build r_vertexmesh_t array
-       // (compressed interleaved array for faster rendering)
-       if (!mesh->vertexmesh && mesh->texcoord2f)
+       // (compressed interleaved array for D3D)
+       if (!mesh->vertexmesh && mesh->texcoord2f && vid.useinterleavedarrays)
        {
                int vertexindex;
                int numvertices = mesh->numverts;
@@ -1208,24 +1212,13 @@ static void Mod_ShadowMesh_CreateVBOs(shadowmesh_t *mesh, mempool_t *mempool)
                }
        }
 
-       // build r_vertexposition_t array
-       if (!mesh->vertexposition)
-       {
-               int vertexindex;
-               int numvertices = mesh->numverts;
-               r_vertexposition_t *vertexposition;
-               mesh->vertexposition = vertexposition = (r_vertexposition_t*)Mem_Alloc(loadmodel->mempool, numvertices * sizeof(*mesh->vertexposition));
-               for (vertexindex = 0;vertexindex < numvertices;vertexindex++, vertexposition++)
-                       VectorCopy(mesh->vertex3f + 3*vertexindex, vertexposition->vertex3f);
-       }
-
        // upload r_vertexmesh_t array as a buffer
        if (mesh->vertexmesh && !mesh->vertexmeshbuffer)
                mesh->vertexmeshbuffer = R_Mesh_CreateMeshBuffer(mesh->vertexmesh, mesh->numverts * sizeof(*mesh->vertexmesh), loadmodel->name, false, false, false);
 
-       // upload r_vertexposition_t array as a buffer
-       if (mesh->vertexposition && !mesh->vertexpositionbuffer)
-               mesh->vertexpositionbuffer = R_Mesh_CreateMeshBuffer(mesh->vertexposition, mesh->numverts * sizeof(*mesh->vertexposition), loadmodel->name, false, false, false);
+       // upload vertex3f array as a buffer
+       if (mesh->vertex3f && !mesh->vertex3fbuffer)
+               mesh->vertex3fbuffer = R_Mesh_CreateMeshBuffer(mesh->vertex3f, mesh->numverts * sizeof(float[3]), loadmodel->name, false, false, false);
 
        // upload short indices as a buffer
        if (mesh->element3s && !mesh->element3s_indexbuffer)
@@ -1240,7 +1233,7 @@ static void Mod_ShadowMesh_CreateVBOs(shadowmesh_t *mesh, mempool_t *mempool)
        // is this wise?  the texcoordtexture2f array is used with dynamic
        // vertex/svector/tvector/normal when rendering animated models, on the
        // other hand animated models don't use a lot of vertices anyway...
-       if (!mesh->vbo_vertexbuffer)
+       if (!mesh->vbo_vertexbuffer && !vid.useinterleavedarrays)
        {
                size_t size;
                unsigned char *mem;
@@ -1345,8 +1338,8 @@ void Mod_ShadowMesh_Free(shadowmesh_t *mesh)
        shadowmesh_t *nextmesh;
        for (;mesh;mesh = nextmesh)
        {
-               if (mesh->vertexpositionbuffer)
-                       R_Mesh_DestroyMeshBuffer(mesh->vertexpositionbuffer);
+               if (mesh->vertex3fbuffer)
+                       R_Mesh_DestroyMeshBuffer(mesh->vertex3fbuffer);
                if (mesh->vertexmeshbuffer)
                        R_Mesh_DestroyMeshBuffer(mesh->vertexmeshbuffer);
                if (mesh->element3i_indexbuffer)
@@ -1362,9 +1355,10 @@ void Mod_ShadowMesh_Free(shadowmesh_t *mesh)
 
 void Mod_CreateCollisionMesh(dp_model_t *mod)
 {
-       int k;
-       int numcollisionmeshtriangles;
-       const msurface_t *surface;
+       int k, numcollisionmeshtriangles;
+       qboolean usesinglecollisionmesh = false;
+       const msurface_t *surface = NULL;
+
        mempool_t *mempool = mod->mempool;
        if (!mempool && mod->brush.parentmodel)
                mempool = mod->brush.parentmodel->mempool;
@@ -1374,19 +1368,30 @@ void Mod_CreateCollisionMesh(dp_model_t *mod)
        for (k = 0;k < mod->nummodelsurfaces;k++)
        {
                surface = mod->data_surfaces + mod->firstmodelsurface + k;
+               if (!strcmp(surface->texture->name, "collision")) // found collision mesh
+               {
+                       usesinglecollisionmesh = true;
+                       numcollisionmeshtriangles = surface->num_triangles;
+                       break;
+               }
                if (!(surface->texture->supercontents & SUPERCONTENTS_SOLID))
                        continue;
                numcollisionmeshtriangles += surface->num_triangles;
        }
        mod->brush.collisionmesh = Mod_ShadowMesh_Begin(mempool, numcollisionmeshtriangles * 3, numcollisionmeshtriangles, NULL, NULL, NULL, false, false, true);
-       for (k = 0;k < mod->nummodelsurfaces;k++)
-       {
-               surface = mod->data_surfaces + mod->firstmodelsurface + k;
-               if (!(surface->texture->supercontents & SUPERCONTENTS_SOLID))
-                       continue;
+       if (usesinglecollisionmesh)
                Mod_ShadowMesh_AddMesh(mempool, mod->brush.collisionmesh, NULL, NULL, NULL, mod->surfmesh.data_vertex3f, NULL, NULL, NULL, NULL, surface->num_triangles, (mod->surfmesh.data_element3i + 3 * surface->num_firsttriangle));
+       else
+       {
+               for (k = 0;k < mod->nummodelsurfaces;k++)
+               {
+                       surface = mod->data_surfaces + mod->firstmodelsurface + k;
+                       if (!(surface->texture->supercontents & SUPERCONTENTS_SOLID))
+                               continue;
+                       Mod_ShadowMesh_AddMesh(mempool, mod->brush.collisionmesh, NULL, NULL, NULL, mod->surfmesh.data_vertex3f, NULL, NULL, NULL, NULL, surface->num_triangles, (mod->surfmesh.data_element3i + 3 * surface->num_firsttriangle));
+               }
        }
-       mod->brush.collisionmesh = Mod_ShadowMesh_Finish(mempool, mod->brush.collisionmesh, false, true, false);
+       mod->brush.collisionmesh = Mod_ShadowMesh_Finish(mempool, mod->brush.collisionmesh, false, false, false);
 }
 
 void Mod_GetTerrainVertex3fTexCoord2fFromBGRA(const unsigned char *imagepixels, int imagewidth, int imageheight, int ix, int iy, float *vertex3f, float *texcoord2f, matrix4x4_t *pixelstepmatrix, matrix4x4_t *pixeltexturestepmatrix)
@@ -1601,6 +1606,8 @@ static void Q3Shader_AddToHash (q3shaderinfo_t* shader)
 }
 
 extern cvar_t mod_q3shader_default_offsetmapping;
+extern cvar_t mod_q3shader_default_polygonoffset;
+extern cvar_t mod_q3shader_default_polygonfactor;
 void Mod_LoadQ3Shaders(void)
 {
        int j;
@@ -1691,6 +1698,8 @@ void Mod_LoadQ3Shaders(void)
                        shader.offsetscale = 1;
                        shader.specularscalemod = 1;
                        shader.specularpowermod = 1;
+                       shader.biaspolygonoffset = mod_q3shader_default_polygonoffset.value;
+                       shader.biaspolygonfactor = mod_q3shader_default_polygonfactor.value;
 
                        strlcpy(shader.name, com_token, sizeof(shader.name));
                        if (!COM_ParseToken_QuakeC(&text, false) || strcasecmp(com_token, "{"))
@@ -2091,6 +2100,18 @@ void Mod_LoadQ3Shaders(void)
                                        shader.textureflags |= Q3TEXTUREFLAG_NOPICMIP;
                                else if (!strcasecmp(parameter[0], "polygonoffset"))
                                        shader.textureflags |= Q3TEXTUREFLAG_POLYGONOFFSET;
+                               else if (!strcasecmp(parameter[0], "dppolygonoffset"))
+                               {
+                                       shader.textureflags |= Q3TEXTUREFLAG_POLYGONOFFSET;
+                                       if(numparameters >= 2)
+                                       {
+                                               shader.biaspolygonfactor = atof(parameter[1]);
+                                               if(numparameters >= 3)
+                                                       shader.biaspolygonoffset = atof(parameter[2]);
+                                               else
+                                                       shader.biaspolygonoffset = 0;
+                                       }
+                               }
                                else if (!strcasecmp(parameter[0], "dprefract") && numparameters >= 5)
                                {
                                        shader.textureflags |= Q3TEXTUREFLAG_REFRACTION;
@@ -2118,6 +2139,11 @@ void Mod_LoadQ3Shaders(void)
                                        Vector4Set(shader.reflectcolor4f, atof(parameter[8]), atof(parameter[9]), atof(parameter[10]), 1);
                                        shader.r_water_wateralpha = atof(parameter[11]);
                                }
+                               else if (!strcasecmp(parameter[0], "dpwaterscroll") && numparameters >= 3)
+                               {
+                                       shader.r_water_waterscroll[0] = 1/atof(parameter[1]);
+                                       shader.r_water_waterscroll[1] = 1/atof(parameter[2]);
+                               }
                                else if (!strcasecmp(parameter[0], "dpglossintensitymod") && numparameters >= 2)
                                {
                                        shader.specularscalemod = atof(parameter[1]);
@@ -2236,7 +2262,7 @@ q3shaderinfo_t *Mod_LookupQ3Shader(const char *name)
 qboolean Mod_LoadTextureFromQ3Shader(texture_t *texture, const char *name, qboolean warnmissing, qboolean fallback, int defaulttexflags)
 {
        int j;
-       int texflagsmask;
+       int texflagsmask, texflagsor;
        qboolean success = true;
        q3shaderinfo_t *shader;
        if (!name)
@@ -2249,6 +2275,11 @@ qboolean Mod_LoadTextureFromQ3Shader(texture_t *texture, const char *name, qbool
                texflagsmask &= ~TEXF_PICMIP;
        if(!(defaulttexflags & TEXF_COMPRESS))
                texflagsmask &= ~TEXF_COMPRESS;
+       texflagsor = 0;
+       if(defaulttexflags & TEXF_ISWORLD)
+               texflagsor |= TEXF_ISWORLD;
+       if(defaulttexflags & TEXF_ISSPRITE)
+               texflagsor |= TEXF_ISSPRITE;
        // unless later loaded from the shader
        texture->offsetmapping = (mod_q3shader_default_offsetmapping.value) ? OFFSETMAPPING_DEFAULT : OFFSETMAPPING_OFF;
        texture->offsetscale = 1;
@@ -2265,7 +2296,7 @@ qboolean Mod_LoadTextureFromQ3Shader(texture_t *texture, const char *name, qbool
                texture->surfaceparms = shader->surfaceparms;
 
                // allow disabling of picmip or compression by defaulttexflags
-               texture->textureflags = shader->textureflags & texflagsmask;
+               texture->textureflags = (shader->textureflags & texflagsmask) | texflagsor;
 
                if (shader->surfaceparms & Q3SURFACEPARM_SKY)
                {
@@ -2286,7 +2317,10 @@ qboolean Mod_LoadTextureFromQ3Shader(texture_t *texture, const char *name, qbool
                if (shader->textureflags & Q3TEXTUREFLAG_TWOSIDED)
                        texture->basematerialflags |= MATERIALFLAG_NOSHADOW | MATERIALFLAG_NOCULLFACE;
                if (shader->textureflags & Q3TEXTUREFLAG_POLYGONOFFSET)
-                       texture->biaspolygonoffset -= 2;
+               {
+                       texture->biaspolygonoffset += shader->biaspolygonoffset;
+                       texture->biaspolygonfactor += shader->biaspolygonfactor;
+               }
                if (shader->textureflags & Q3TEXTUREFLAG_REFRACTION)
                        texture->basematerialflags |= MATERIALFLAG_REFRACTION;
                if (shader->textureflags & Q3TEXTUREFLAG_REFLECTION)
@@ -2353,7 +2387,7 @@ nothing                GL_ZERO GL_ONE
                                {
                                        texture->skinframes[j] = NULL;
                                }
-                               else if (!(texture->skinframes[j] = R_SkinFrame_LoadExternal(primarylayer->texturename[j], primarylayer->texflags & texflagsmask, false)))
+                               else if (!(texture->skinframes[j] = R_SkinFrame_LoadExternal(primarylayer->texturename[j], (primarylayer->texflags & texflagsmask) | texflagsor, false)))
                                {
                                        Con_Printf("^1%s:^7 could not load texture ^3\"%s\"^7 (frame %i) for shader ^2\"%s\"\n", loadmodel->name, primarylayer->texturename[j], j, texture->name);
                                        texture->skinframes[j] = R_SkinFrame_LoadMissing();
@@ -2374,7 +2408,7 @@ nothing                GL_ZERO GL_ONE
                                {
                                        texture->skinframes[j] = NULL;
                                }
-                               else if (!(texture->backgroundskinframes[j] = R_SkinFrame_LoadExternal(backgroundlayer->texturename[j], backgroundlayer->texflags & texflagsmask, false)))
+                               else if (!(texture->backgroundskinframes[j] = R_SkinFrame_LoadExternal(backgroundlayer->texturename[j], (backgroundlayer->texflags & texflagsmask) | texflagsor, false)))
                                {
                                        Con_Printf("^1%s:^7 could not load texture ^3\"%s\"^7 (background frame %i) for shader ^2\"%s\"\n", loadmodel->name, backgroundlayer->texturename[j], j, texture->name);
                                        texture->backgroundskinframes[j] = R_SkinFrame_LoadMissing();
@@ -2393,6 +2427,7 @@ nothing                GL_ZERO GL_ONE
                texture->reflectfactor = shader->reflectfactor;
                Vector4Copy(shader->reflectcolor4f, texture->reflectcolor4f);
                texture->r_water_wateralpha = shader->r_water_wateralpha;
+               Vector2Copy(shader->r_water_waterscroll, texture->r_water_waterscroll);
                texture->offsetmapping = shader->offsetmapping;
                texture->offsetscale = shader->offsetscale;
                texture->specularscalemod = shader->specularscalemod;
@@ -2748,8 +2783,8 @@ void Mod_BuildVBOs(void)
        }
 
        // build r_vertexmesh_t array
-       // (compressed interleaved array for faster rendering)
-       if (!loadmodel->surfmesh.vertexmesh)
+       // (compressed interleaved array for D3D)
+       if (!loadmodel->surfmesh.vertexmesh && vid.useinterleavedarrays)
        {
                int vertexindex;
                int numvertices = loadmodel->surfmesh.num_vertices;
@@ -2769,24 +2804,13 @@ void Mod_BuildVBOs(void)
                }
        }
 
-       // build r_vertexposition_t array
-       if (!loadmodel->surfmesh.vertexposition)
-       {
-               int vertexindex;
-               int numvertices = loadmodel->surfmesh.num_vertices;
-               r_vertexposition_t *vertexposition;
-               loadmodel->surfmesh.vertexposition = vertexposition = (r_vertexposition_t*)Mem_Alloc(loadmodel->mempool, numvertices * sizeof(*loadmodel->surfmesh.vertexposition));
-               for (vertexindex = 0;vertexindex < numvertices;vertexindex++, vertexposition++)
-                       VectorCopy(loadmodel->surfmesh.data_vertex3f + 3*vertexindex, vertexposition->vertex3f);
-       }
-
        // upload r_vertexmesh_t array as a buffer
        if (loadmodel->surfmesh.vertexmesh && !loadmodel->surfmesh.vertexmeshbuffer)
                loadmodel->surfmesh.vertexmeshbuffer = R_Mesh_CreateMeshBuffer(loadmodel->surfmesh.vertexmesh, loadmodel->surfmesh.num_vertices * sizeof(*loadmodel->surfmesh.vertexmesh), loadmodel->name, false, false, false);
 
-       // upload r_vertexposition_t array as a buffer
-       if (loadmodel->surfmesh.vertexposition && !loadmodel->surfmesh.vertexpositionbuffer)
-               loadmodel->surfmesh.vertexpositionbuffer = R_Mesh_CreateMeshBuffer(loadmodel->surfmesh.vertexposition, loadmodel->surfmesh.num_vertices * sizeof(*loadmodel->surfmesh.vertexposition), loadmodel->name, false, false, false);
+       // upload vertex3f array as a buffer
+       if (loadmodel->surfmesh.data_vertex3f && !loadmodel->surfmesh.vertex3fbuffer)
+               loadmodel->surfmesh.vertex3fbuffer = R_Mesh_CreateMeshBuffer(loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.num_vertices * sizeof(float[3]), loadmodel->name, false, false, false);
 
        // upload short indices as a buffer
        if (loadmodel->surfmesh.data_element3s && !loadmodel->surfmesh.data_element3s_indexbuffer)
@@ -2802,7 +2826,7 @@ void Mod_BuildVBOs(void)
        // is this wise?  the texcoordtexture2f array is used with dynamic
        // vertex/svector/tvector/normal when rendering animated models, on the
        // other hand animated models don't use a lot of vertices anyway...
-       if (!loadmodel->surfmesh.vbo_vertexbuffer)
+       if (!loadmodel->surfmesh.vbo_vertexbuffer && !vid.useinterleavedarrays)
        {
                size_t size;
                unsigned char *mem;
@@ -2829,7 +2853,7 @@ void Mod_BuildVBOs(void)
 
 static void Mod_Decompile_OBJ(dp_model_t *model, const char *filename, const char *mtlfilename, const char *originalfilename)
 {
-       int vertexindex, surfaceindex, triangleindex, textureindex, countvertices = 0, countsurfaces = 0, countfaces = 0, counttextures = 0;
+       int submodelindex, vertexindex, surfaceindex, triangleindex, textureindex, countvertices = 0, countsurfaces = 0, countfaces = 0, counttextures = 0;
        int a, b, c;
        const char *texname;
        const int *e;
@@ -2841,6 +2865,7 @@ static void Mod_Decompile_OBJ(dp_model_t *model, const char *filename, const cha
        const msurface_t *surface;
        const int maxtextures = 256;
        char *texturenames = (char *) Z_Malloc(maxtextures * MAX_QPATH);
+       dp_model_t *submodel;
 
        // construct the mtllib file
        l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "# mtllib for %s exported by darkplaces engine\n", originalfilename);
@@ -2876,12 +2901,13 @@ static void Mod_Decompile_OBJ(dp_model_t *model, const char *filename, const cha
 
        // write the mtllib file
        FS_WriteFile(mtlfilename, outbuffer, outbufferpos);
-       outbufferpos = 0;
 
        // construct the obj file
+       outbufferpos = 0;
        l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "# model exported from %s by darkplaces engine\n# %i vertices, %i faces, %i surfaces\nmtllib %s\n", originalfilename, countvertices, countfaces, countsurfaces, mtlfilename);
        if (l > 0)
                outbufferpos += l;
+
        for (vertexindex = 0, v = model->surfmesh.data_vertex3f, vn = model->surfmesh.data_normal3f, vt = model->surfmesh.data_texcoordtexture2f;vertexindex < model->surfmesh.num_vertices;vertexindex++, v += 3, vn += 3, vt += 2)
        {
                if (outbufferpos >= outbuffermax >> 1)
@@ -2892,31 +2918,40 @@ static void Mod_Decompile_OBJ(dp_model_t *model, const char *filename, const cha
                        memcpy(outbuffer, oldbuffer, outbufferpos);
                        Z_Free(oldbuffer);
                }
-               l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "v %f %f %f\nvn %f %f %f\nvt %f %f\n", v[0], v[2], -v[1], vn[0], vn[2], -vn[1], vt[0], 1-vt[1]);
+               l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "v %f %f %f\nvn %f %f %f\nvt %f %f\n", v[0], v[2], v[1], vn[0], vn[2], vn[1], vt[0], 1-vt[1]);
                if (l > 0)
                        outbufferpos += l;
        }
-       for (surfaceindex = 0, surface = model->data_surfaces;surfaceindex < model->num_surfaces;surfaceindex++, surface++)
+
+       for (submodelindex = 0;submodelindex < max(1, model->brush.numsubmodels);submodelindex++)
        {
-               l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "usemtl %s\n", (surface->texture && surface->texture->name[0]) ? surface->texture->name : "default");
+               l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "o %i\n", submodelindex);
                if (l > 0)
                        outbufferpos += l;
-               for (triangleindex = 0, e = model->surfmesh.data_element3i + surface->num_firsttriangle * 3;triangleindex < surface->num_triangles;triangleindex++, e += 3)
+               submodel = model->brush.numsubmodels ? model->brush.submodels[submodelindex] : model;
+               for (surfaceindex = 0;surfaceindex < submodel->nummodelsurfaces;surfaceindex++)
                {
-                       if (outbufferpos >= outbuffermax >> 1)
-                       {
-                               outbuffermax *= 2;
-                               oldbuffer = outbuffer;
-                               outbuffer = (char *) Z_Malloc(outbuffermax);
-                               memcpy(outbuffer, oldbuffer, outbufferpos);
-                               Z_Free(oldbuffer);
-                       }
-                       a = e[0]+1;
-                       b = e[2]+1;
-                       c = e[1]+1;
-                       l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "f %i/%i/%i %i/%i/%i %i/%i/%i\n", a,a,a,b,b,b,c,c,c);
+                       surface = model->data_surfaces + submodel->sortedmodelsurfaces[surfaceindex];
+                       l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "usemtl %s\n", (surface->texture && surface->texture->name[0]) ? surface->texture->name : "default");
                        if (l > 0)
                                outbufferpos += l;
+                       for (triangleindex = 0, e = model->surfmesh.data_element3i + surface->num_firsttriangle * 3;triangleindex < surface->num_triangles;triangleindex++, e += 3)
+                       {
+                               if (outbufferpos >= outbuffermax >> 1)
+                               {
+                                       outbuffermax *= 2;
+                                       oldbuffer = outbuffer;
+                                       outbuffer = (char *) Z_Malloc(outbuffermax);
+                                       memcpy(outbuffer, oldbuffer, outbufferpos);
+                                       Z_Free(oldbuffer);
+                               }
+                               a = e[0]+1;
+                               b = e[1]+1;
+                               c = e[2]+1;
+                               l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "f %i/%i/%i %i/%i/%i %i/%i/%i\n", a,a,a,b,b,b,c,c,c);
+                               if (l > 0)
+                                       outbufferpos += l;
+                       }
                }
        }
 
@@ -3393,8 +3428,8 @@ static void Mod_GenerateLightmaps_LightPoint(dp_model_t *model, const vec3_t pos
                        continue;
                lightiradius = 1.0f / lightradius;
                dist = sqrt(dist2) * lightiradius;
-               intensity = dist < 1 ? ((1.0f - dist) * r_shadow_lightattenuationlinearscale.value / (r_shadow_lightattenuationdividebias.value + dist*dist)) : 0;
-               if (intensity <= 0)
+               intensity = (1.0f - dist) * r_shadow_lightattenuationlinearscale.value / (r_shadow_lightattenuationdividebias.value + dist*dist);
+               if (intensity <= 0.0f)
                        continue;
                if (model && model->TraceLine)
                {
@@ -3778,15 +3813,12 @@ static void Mod_GenerateLightmaps_UnweldTriangles(dp_model_t *model)
        if (model->surfmesh.num_vertices > 65536)
                model->surfmesh.data_element3s = NULL;
 
-       if (model->surfmesh.vertexposition)
-               Mem_Free(model->surfmesh.vertexposition);
-       model->surfmesh.vertexposition = NULL;
        if (model->surfmesh.vertexmesh)
                Mem_Free(model->surfmesh.vertexmesh);
        model->surfmesh.vertexmesh = NULL;
-       if (model->surfmesh.vertexpositionbuffer)
-               R_Mesh_DestroyMeshBuffer(model->surfmesh.vertexpositionbuffer);
-       model->surfmesh.vertexpositionbuffer = NULL;
+       if (model->surfmesh.vertex3fbuffer)
+               R_Mesh_DestroyMeshBuffer(model->surfmesh.vertex3fbuffer);
+       model->surfmesh.vertex3fbuffer = NULL;
        if (model->surfmesh.vertexmeshbuffer)
                R_Mesh_DestroyMeshBuffer(model->surfmesh.vertexmeshbuffer);
        model->surfmesh.vertexmeshbuffer = NULL;