]> git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - gl_rmain.c
r_shadow_deferred now checks for r_shadow_gloss 0 and does not use the
[xonotic/darkplaces.git] / gl_rmain.c
index a4467e58a57f1809ccbc320602893d7bf9cf214b..d5e82c56a515cdeac5e44212e3d5fe056b321f26 100644 (file)
@@ -115,6 +115,7 @@ cvar_t r_polygonoffset_submodel_offset = {0, "r_polygonoffset_submodel_offset",
 cvar_t r_polygonoffset_decals_factor = {0, "r_polygonoffset_decals_factor", "0", "biases depth values of decals to prevent z-fighting artifacts"};
 cvar_t r_polygonoffset_decals_offset = {0, "r_polygonoffset_decals_offset", "-14", "biases depth values of decals to prevent z-fighting artifacts"};
 cvar_t r_fog_exp2 = {0, "r_fog_exp2", "0", "uses GL_EXP2 fog (as in Nehahra) rather than realistic GL_EXP fog"};
+cvar_t r_fog_clear = {0, "r_fog_clear", "1", "clears renderbuffer with fog color before render starts"};
 cvar_t r_drawfog = {CVAR_SAVE, "r_drawfog", "1", "allows one to disable fog rendering"};
 cvar_t r_transparentdepthmasking = {CVAR_SAVE, "r_transparentdepthmasking", "0", "enables depth writes on transparent meshes whose materially is normally opaque, this prevents seeing the inside of a transparent mesh"};
 
@@ -142,7 +143,9 @@ static cvar_t r_glsl = {CVAR_READONLY, "r_glsl", "1", "indicates whether the Ope
 
 cvar_t r_glsl_deluxemapping = {CVAR_SAVE, "r_glsl_deluxemapping", "1", "use per pixel lighting on deluxemap-compiled q3bsp maps (or a value of 2 forces deluxemap shading even without deluxemaps)"};
 cvar_t r_glsl_offsetmapping = {CVAR_SAVE, "r_glsl_offsetmapping", "0", "offset mapping effect (also known as parallax mapping or virtual displacement mapping)"};
+cvar_t r_glsl_offsetmapping_steps = {CVAR_SAVE, "r_glsl_offsetmapping_steps", "2", "offset mapping steps (note: too high values may be not supported by your GPU)"};
 cvar_t r_glsl_offsetmapping_reliefmapping = {CVAR_SAVE, "r_glsl_offsetmapping_reliefmapping", "0", "relief mapping effect (higher quality)"};
+cvar_t r_glsl_offsetmapping_reliefmapping_steps = {CVAR_SAVE, "r_glsl_offsetmapping_reliefmapping_steps", "10", "relief mapping steps (note: too high values may be not supported by your GPU)"};
 cvar_t r_glsl_offsetmapping_scale = {CVAR_SAVE, "r_glsl_offsetmapping_scale", "0.04", "how deep the offset mapping effect is"};
 cvar_t r_glsl_postprocess = {CVAR_SAVE, "r_glsl_postprocess", "0", "use a GLSL postprocessing shader"};
 cvar_t r_glsl_postprocess_uservec1 = {CVAR_SAVE, "r_glsl_postprocess_uservec1", "0 0 0 0", "a 4-component vector to pass as uservec1 to the postprocessing shader (only useful if default.glsl has been customized)"};
@@ -204,6 +207,8 @@ cvar_t r_overheadsprites_scaley = {CVAR_SAVE, "r_overheadsprites_scaley", "1", "
 cvar_t r_glsl_saturation = {CVAR_SAVE, "r_glsl_saturation", "1", "saturation multiplier (only working in glsl!)"};
 cvar_t r_glsl_saturation_redcompensate = {CVAR_SAVE, "r_glsl_saturation_redcompensate", "0", "a 'vampire sight' addition to desaturation effect, does compensation for red color, r_glsl_restart is required"};
 
+cvar_t r_glsl_vertextextureblend_usebothalphas = {CVAR_SAVE, "r_glsl_vertextextureblend_usebothalphas", "0", "use both alpha layers on vertex blended surfaces, each alpha layer sets amount of 'blend leak' on another layer."};
+
 cvar_t r_framedatasize = {CVAR_SAVE, "r_framedatasize", "0.5", "size of renderer data cache used during one frame (for skeletal animation caching, light processing, etc)"};
 
 extern cvar_t v_glslgamma;
@@ -654,6 +659,7 @@ shaderpermutationinfo_t shaderpermutationinfo[SHADERPERMUTATION_COUNT] =
        {"#define USEREFLECTCUBE\n", " reflectcube"},
        {"#define USENORMALMAPSCROLLBLEND\n", " normalmapscrollblend"},
        {"#define USEBOUNCEGRID\n", " bouncegrid"},
+       {"#define USEBOUNCEGRIDDIRECTIONAL\n", " bouncegriddirectional"},
 };
 
 // NOTE: MUST MATCH ORDER OF SHADERMODE_* ENUMS!
@@ -795,7 +801,7 @@ typedef struct r_glsl_permutation_s
        int loc_LightColor;
        int loc_LightDir;
        int loc_LightPosition;
-       int loc_OffsetMapping_Scale;
+       int loc_OffsetMapping_ScaleSteps;
        int loc_PixelSize;
        int loc_ReflectColor;
        int loc_ReflectFactor;
@@ -841,9 +847,10 @@ enum
        SHADERSTATICPARM_POSTPROCESS_USERVEC1 = 2, ///< postprocess uservec1 is enabled
        SHADERSTATICPARM_POSTPROCESS_USERVEC2 = 3, ///< postprocess uservec2 is enabled
        SHADERSTATICPARM_POSTPROCESS_USERVEC3 = 4, ///< postprocess uservec3 is enabled
-       SHADERSTATICPARM_POSTPROCESS_USERVEC4 = 5  ///< postprocess uservec4 is enabled
+       SHADERSTATICPARM_POSTPROCESS_USERVEC4 = 5,  ///< postprocess uservec4 is enabled
+       SHADERSTATICPARM_VERTEXTEXTUREBLEND_USEBOTHALPHAS = 6 // use both alpha layers while blending materials, allows more advanced microblending
 };
-#define SHADERSTATICPARMS_COUNT 6
+#define SHADERSTATICPARMS_COUNT 7
 
 static const char *shaderstaticparmstrings_list[SHADERSTATICPARMS_COUNT];
 static int shaderstaticparms_count = 0;
@@ -859,6 +866,8 @@ qboolean R_CompileShader_CheckStaticParms(void)
        // detect all
        if (r_glsl_saturation_redcompensate.integer)
                R_COMPILESHADER_STATICPARM_ENABLE(SHADERSTATICPARM_SATURATION_REDCOMPENSATE);
+       if (r_glsl_vertextextureblend_usebothalphas.integer)
+               R_COMPILESHADER_STATICPARM_ENABLE(SHADERSTATICPARM_VERTEXTEXTUREBLEND_USEBOTHALPHAS);
        if (r_shadow_glossexact.integer)
                R_COMPILESHADER_STATICPARM_ENABLE(SHADERSTATICPARM_EXACTSPECULARMATH);
        if (r_glsl_postprocess.integer)
@@ -891,6 +900,7 @@ void R_CompileShader_AddStaticParms(unsigned int mode, unsigned int permutation)
        R_COMPILESHADER_STATICPARM_EMIT(SHADERSTATICPARM_POSTPROCESS_USERVEC2, "USERVEC2");
        R_COMPILESHADER_STATICPARM_EMIT(SHADERSTATICPARM_POSTPROCESS_USERVEC3, "USERVEC3");
        R_COMPILESHADER_STATICPARM_EMIT(SHADERSTATICPARM_POSTPROCESS_USERVEC4, "USERVEC4");
+       R_COMPILESHADER_STATICPARM_EMIT(SHADERSTATICPARM_VERTEXTEXTUREBLEND_USEBOTHALPHAS, "USEBOTHALPHAS");
 }
 
 /// information about each possible shader permutation
@@ -986,6 +996,9 @@ static void R_GLSL_CompilePermutation(r_glsl_permutation_t *p, unsigned int mode
                vertstrings_list[vertstrings_count++] = "#version 130\n";
                geomstrings_list[geomstrings_count++] = "#version 130\n";
                fragstrings_list[fragstrings_count++] = "#version 130\n";
+               vertstrings_list[vertstrings_count++] = "#define GLSL130\n";
+               geomstrings_list[geomstrings_count++] = "#define GLSL130\n";
+               fragstrings_list[fragstrings_count++] = "#define GLSL130\n";
        }
 
        // the first pretext is which type of shader to compile as
@@ -1105,7 +1118,7 @@ static void R_GLSL_CompilePermutation(r_glsl_permutation_t *p, unsigned int mode
                p->loc_LightColor                 = qglGetUniformLocation(p->program, "LightColor");
                p->loc_LightDir                   = qglGetUniformLocation(p->program, "LightDir");
                p->loc_LightPosition              = qglGetUniformLocation(p->program, "LightPosition");
-               p->loc_OffsetMapping_Scale        = qglGetUniformLocation(p->program, "OffsetMapping_Scale");
+               p->loc_OffsetMapping_ScaleSteps   = qglGetUniformLocation(p->program, "OffsetMapping_ScaleSteps");
                p->loc_PixelSize                  = qglGetUniformLocation(p->program, "PixelSize");
                p->loc_ReflectColor               = qglGetUniformLocation(p->program, "ReflectColor");
                p->loc_ReflectFactor              = qglGetUniformLocation(p->program, "ReflectFactor");
@@ -1322,7 +1335,7 @@ typedef enum D3DPSREGISTER_e
        D3DPSREGISTER_LightColor = 21,
        D3DPSREGISTER_LightDir = 22, // unused
        D3DPSREGISTER_LightPosition = 23,
-       D3DPSREGISTER_OffsetMapping_Scale = 24,
+       D3DPSREGISTER_OffsetMapping_ScaleSteps = 24,
        D3DPSREGISTER_PixelSize = 25,
        D3DPSREGISTER_ReflectColor = 26,
        D3DPSREGISTER_ReflectFactor = 27,
@@ -2059,14 +2072,14 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
        r_waterstate_waterplane_t *waterplane = (r_waterstate_waterplane_t *)surfacewaterplane;
        if (rsurface.texture->currentmaterialflags & MATERIALFLAG_ALPHATEST)
                permutation |= SHADERPERMUTATION_ALPHAKILL;
+       if (rsurface.texture->r_water_waterscroll[0] && rsurface.texture->r_water_waterscroll[1])
+               permutation |= SHADERPERMUTATION_NORMALMAPSCROLLBLEND; // todo: make generic
        if (rsurfacepass == RSURFPASS_BACKGROUND)
        {
                // distorted background
                if (rsurface.texture->currentmaterialflags & MATERIALFLAG_WATERSHADER)
                {
                        mode = SHADERMODE_WATER;
-                       if (rsurface.texture->r_water_waterscroll[0] && rsurface.texture->r_water_waterscroll[1])
-                               permutation |= SHADERPERMUTATION_NORMALMAPSCROLLBLEND;
                        if((r_wateralpha.value < 1) && (rsurface.texture->currentmaterialflags & MATERIALFLAG_WATERALPHA))
                        {
                                // this is the right thing to do for wateralpha
@@ -2259,7 +2272,11 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
                if (rsurface.texture->reflectmasktexture)
                        permutation |= SHADERPERMUTATION_REFLECTCUBE;
                if (r_shadow_bouncegridtexture)
+               {
                        permutation |= SHADERPERMUTATION_BOUNCEGRID;
+                       if (r_shadow_bouncegriddirectional)
+                               permutation |= SHADERPERMUTATION_BOUNCEGRIDDIRECTIONAL;
+               }
                GL_BlendFunc(rsurface.texture->currentlayers[0].blendfunc1, rsurface.texture->currentlayers[0].blendfunc2);
                blendfuncflags = R_BlendFuncFlags(rsurface.texture->currentlayers[0].blendfunc1, rsurface.texture->currentlayers[0].blendfunc2);
        }
@@ -2307,7 +2324,11 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
                if (rsurface.texture->reflectmasktexture)
                        permutation |= SHADERPERMUTATION_REFLECTCUBE;
                if (r_shadow_bouncegridtexture)
+               {
                        permutation |= SHADERPERMUTATION_BOUNCEGRID;
+                       if (r_shadow_bouncegriddirectional)
+                               permutation |= SHADERPERMUTATION_BOUNCEGRIDDIRECTIONAL;
+               }
                GL_BlendFunc(rsurface.texture->currentlayers[0].blendfunc1, rsurface.texture->currentlayers[0].blendfunc2);
                blendfuncflags = R_BlendFuncFlags(rsurface.texture->currentlayers[0].blendfunc1, rsurface.texture->currentlayers[0].blendfunc2);
        }
@@ -2391,7 +2412,11 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
                        mode = SHADERMODE_VERTEXCOLOR;
                }
                if (r_shadow_bouncegridtexture)
+               {
                        permutation |= SHADERPERMUTATION_BOUNCEGRID;
+                       if (r_shadow_bouncegriddirectional)
+                               permutation |= SHADERPERMUTATION_BOUNCEGRIDDIRECTIONAL;
+               }
                GL_BlendFunc(rsurface.texture->currentlayers[0].blendfunc1, rsurface.texture->currentlayers[0].blendfunc2);
                blendfuncflags = R_BlendFuncFlags(rsurface.texture->currentlayers[0].blendfunc1, rsurface.texture->currentlayers[0].blendfunc2);
        }
@@ -2496,7 +2521,7 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
                hlslPSSetParameter1f(D3DPSREGISTER_FogPlaneViewDist, rsurface.fogplaneviewdist);
                hlslPSSetParameter1f(D3DPSREGISTER_FogRangeRecip, rsurface.fograngerecip);
                hlslPSSetParameter1f(D3DPSREGISTER_FogHeightFade, rsurface.fogheightfade);
-               hlslPSSetParameter1f(D3DPSREGISTER_OffsetMapping_Scale, r_glsl_offsetmapping_scale.value);
+               hlslPSSetParameter3f(D3DPSREGISTER_OffsetMapping_ScaleSteps, r_glsl_offsetmapping_scale.value, max(1, (permutation & SHADERPERMUTATION_OFFSETMAPPING_RELIEFMAPPING) ? r_glsl_offsetmapping_reliefmapping_steps.integer : r_glsl_offsetmapping_steps.integer), 1.0 / max(1, (permutation & SHADERPERMUTATION_OFFSETMAPPING_RELIEFMAPPING) ? r_glsl_offsetmapping_reliefmapping_steps.integer : r_glsl_offsetmapping_steps.integer));
                hlslPSSetParameter2f(D3DPSREGISTER_ScreenToDepth, r_refdef.view.viewport.screentodepth[0], r_refdef.view.viewport.screentodepth[1]);
                hlslPSSetParameter2f(D3DPSREGISTER_PixelToScreenTexCoord, 1.0f/vid.width, 1.0/vid.height);
 
@@ -2651,11 +2676,11 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
                if (r_glsl_permutation->loc_FogPlaneViewDist >= 0) qglUniform1f(r_glsl_permutation->loc_FogPlaneViewDist, rsurface.fogplaneviewdist);
                if (r_glsl_permutation->loc_FogRangeRecip >= 0) qglUniform1f(r_glsl_permutation->loc_FogRangeRecip, rsurface.fograngerecip);
                if (r_glsl_permutation->loc_FogHeightFade >= 0) qglUniform1f(r_glsl_permutation->loc_FogHeightFade, rsurface.fogheightfade);
-               if (r_glsl_permutation->loc_OffsetMapping_Scale >= 0) qglUniform1f(r_glsl_permutation->loc_OffsetMapping_Scale, r_glsl_offsetmapping_scale.value*rsurface.texture->offsetscale);
+               if (r_glsl_permutation->loc_OffsetMapping_ScaleSteps >= 0) qglUniform3f(r_glsl_permutation->loc_OffsetMapping_ScaleSteps, r_glsl_offsetmapping_scale.value*rsurface.texture->offsetscale, max(1, (permutation & SHADERPERMUTATION_OFFSETMAPPING_RELIEFMAPPING) ? r_glsl_offsetmapping_reliefmapping_steps.integer : r_glsl_offsetmapping_steps.integer), 1.0 / max(1, (permutation & SHADERPERMUTATION_OFFSETMAPPING_RELIEFMAPPING) ? r_glsl_offsetmapping_reliefmapping_steps.integer : r_glsl_offsetmapping_steps.integer));
                if (r_glsl_permutation->loc_ScreenToDepth >= 0) qglUniform2f(r_glsl_permutation->loc_ScreenToDepth, r_refdef.view.viewport.screentodepth[0], r_refdef.view.viewport.screentodepth[1]);
                if (r_glsl_permutation->loc_PixelToScreenTexCoord >= 0) qglUniform2f(r_glsl_permutation->loc_PixelToScreenTexCoord, 1.0f/vid.width, 1.0f/vid.height);
                if (r_glsl_permutation->loc_BounceGridMatrix >= 0) {Matrix4x4_Concat(&tempmatrix, &r_shadow_bouncegridmatrix, &rsurface.matrix);Matrix4x4_ToArrayFloatGL(&tempmatrix, m16f);qglUniformMatrix4fv(r_glsl_permutation->loc_BounceGridMatrix, 1, false, m16f);}
-               if (r_glsl_permutation->loc_BounceGridIntensity >= 0) qglUniform1f(r_glsl_permutation->loc_BounceGridIntensity, r_shadow_bouncegridintensity);
+               if (r_glsl_permutation->loc_BounceGridIntensity >= 0) qglUniform1f(r_glsl_permutation->loc_BounceGridIntensity, r_shadow_bouncegridintensity*r_refdef.view.colorscale);
 
                if (r_glsl_permutation->tex_Texture_First           >= 0) R_Mesh_TexBind(r_glsl_permutation->tex_Texture_First            , r_texture_white                                     );
                if (r_glsl_permutation->tex_Texture_Second          >= 0) R_Mesh_TexBind(r_glsl_permutation->tex_Texture_Second           , r_texture_white                                     );
@@ -2790,7 +2815,7 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
                DPSOFTRAST_Uniform1f(DPSOFTRAST_UNIFORM_FogPlaneViewDist, rsurface.fogplaneviewdist);
                DPSOFTRAST_Uniform1f(DPSOFTRAST_UNIFORM_FogRangeRecip, rsurface.fograngerecip);
                DPSOFTRAST_Uniform1f(DPSOFTRAST_UNIFORM_FogHeightFade, rsurface.fogheightfade);
-               DPSOFTRAST_Uniform1f(DPSOFTRAST_UNIFORM_OffsetMapping_Scale, r_glsl_offsetmapping_scale.value*rsurface.texture->offsetscale);
+               DPSOFTRAST_Uniform3f(DPSOFTRAST_UNIFORM_OffsetMapping_ScaleSteps, r_glsl_offsetmapping_scale.value*rsurface.texture->offsetscale, max(1, (permutation & SHADERPERMUTATION_OFFSETMAPPING_RELIEFMAPPING) ? r_glsl_offsetmapping_reliefmapping_steps.integer : r_glsl_offsetmapping_steps.integer), 1.0 / max(1, (permutation & SHADERPERMUTATION_OFFSETMAPPING_RELIEFMAPPING) ? r_glsl_offsetmapping_reliefmapping_steps.integer : r_glsl_offsetmapping_steps.integer));
                DPSOFTRAST_Uniform2f(DPSOFTRAST_UNIFORM_ScreenToDepth, r_refdef.view.viewport.screentodepth[0], r_refdef.view.viewport.screentodepth[1]);
                DPSOFTRAST_Uniform2f(DPSOFTRAST_UNIFORM_PixelToScreenTexCoord, 1.0f/vid.width, 1.0f/vid.height);
 
@@ -2863,7 +2888,7 @@ void R_SetupShader_DeferredLight(const rtlight_t *rtlight)
                permutation |= SHADERPERMUTATION_CUBEFILTER;
        if (diffusescale > 0)
                permutation |= SHADERPERMUTATION_DIFFUSE;
-       if (specularscale > 0)
+       if (specularscale > 0 && r_shadow_gloss.integer > 0)
                permutation |= SHADERPERMUTATION_SPECULAR | SHADERPERMUTATION_DIFFUSE;
        if (r_shadow_usingshadowmap2d)
        {
@@ -3842,6 +3867,9 @@ void gl_main_start(void)
        r_qwskincache = NULL;
        r_qwskincache_size = 0;
 
+       // due to caching of texture_t references, the collision cache must be reset
+       Collision_Cache_Reset(true);
+
        // set up r_skinframe loading system for textures
        memset(&r_skinframe, 0, sizeof(r_skinframe));
        r_skinframe.loadsequence = 1;
@@ -4051,6 +4079,7 @@ void GL_Main_Init(void)
        Cvar_RegisterVariable(&r_polygonoffset_decals_factor);
        Cvar_RegisterVariable(&r_polygonoffset_decals_offset);
        Cvar_RegisterVariable(&r_fog_exp2);
+       Cvar_RegisterVariable(&r_fog_clear);
        Cvar_RegisterVariable(&r_drawfog);
        Cvar_RegisterVariable(&r_transparentdepthmasking);
        Cvar_RegisterVariable(&r_texture_dds_load);
@@ -4065,7 +4094,9 @@ void GL_Main_Init(void)
        Cvar_RegisterVariable(&r_glsl);
        Cvar_RegisterVariable(&r_glsl_deluxemapping);
        Cvar_RegisterVariable(&r_glsl_offsetmapping);
+       Cvar_RegisterVariable(&r_glsl_offsetmapping_steps);
        Cvar_RegisterVariable(&r_glsl_offsetmapping_reliefmapping);
+       Cvar_RegisterVariable(&r_glsl_offsetmapping_reliefmapping_steps);
        Cvar_RegisterVariable(&r_glsl_offsetmapping_scale);
        Cvar_RegisterVariable(&r_glsl_postprocess);
        Cvar_RegisterVariable(&r_glsl_postprocess_uservec1);
@@ -4110,6 +4141,7 @@ void GL_Main_Init(void)
        Cvar_RegisterVariable(&r_test);
        Cvar_RegisterVariable(&r_glsl_saturation);
        Cvar_RegisterVariable(&r_glsl_saturation_redcompensate);
+       Cvar_RegisterVariable(&r_glsl_vertextextureblend_usebothalphas);
        Cvar_RegisterVariable(&r_framedatasize);
        if (gamemode == GAME_NEHAHRA || gamemode == GAME_TENEBRAE)
                Cvar_SetValue("r_fullbrights", 0);
@@ -4582,7 +4614,7 @@ static void R_View_UpdateEntityLighting (void)
                        {
                                if (ent->model->sprite.sprnum_type == SPR_OVERHEAD) // apply offset for overhead sprites
                                        org[2] = org[2] + r_overheadsprites_pushback.value;
-                               R_CompleteLightPoint(ent->modellight_ambient, ent->modellight_diffuse, tempdiffusenormal, org, LP_LIGHTMAP | LP_RTWORLD | LP_DYNLIGHT);
+                               R_LightPoint(ent->modellight_ambient, org, LP_LIGHTMAP | LP_RTWORLD | LP_DYNLIGHT);
                        }
                        else
                                R_CompleteLightPoint(ent->modellight_ambient, ent->modellight_diffuse, tempdiffusenormal, org, LP_LIGHTMAP);
@@ -9174,6 +9206,12 @@ static void RSurf_DrawBatch_GL11_MakeFogColor(float r, float g, float b, float a
        float f;
        const float *v;
        float *c;
+
+       // fake shading
+       rsurface.passcolor4f = (float *)R_FrameData_Alloc(rsurface.batchnumvertices * sizeof(float[4]));
+       rsurface.passcolor4f_vertexbuffer = 0;
+       rsurface.passcolor4f_bufferoffset = 0;
+
        for (i = 0, v = rsurface.batchvertex3f + rsurface.batchfirstvertex * 3, c = rsurface.passcolor4f + rsurface.batchfirstvertex * 4;i < rsurface.batchnumvertices;i++, v += 3, c += 4)
        {
                f = 1 - RSurf_FogVertex(v);
@@ -10265,11 +10303,23 @@ static void R_DecalSystem_SplatTriangle(decalsystem_t *decalsystem, float r, flo
        vertex3f = rsurface.modelvertex3f;
        normal3f = rsurface.modelnormal3f;
 
-       for (cornerindex = 0;cornerindex < 3;cornerindex++)
+       if (normal3f)
        {
-               index = 3*e[cornerindex];
-               VectorMA(vertex3f + index, cl_decals_bias.value, normal3f + index, v[cornerindex]);
+               for (cornerindex = 0;cornerindex < 3;cornerindex++)
+               {
+                       index = 3*e[cornerindex];
+                       VectorMA(vertex3f + index, cl_decals_bias.value, normal3f + index, v[cornerindex]);
+               }
        }
+       else
+       {
+               for (cornerindex = 0;cornerindex < 3;cornerindex++)
+               {
+                       index = 3*e[cornerindex];
+                       VectorCopy(vertex3f + index, v[cornerindex]);
+               }
+       }
+
        // cull backfaces
        //TriangleNormal(v[0], v[1], v[2], normal);
        //if (DotProduct(normal, localnormal) < 0.0f)