first part of fog changes: no longer use a complex glsl equation; modify the table...

[xonotic/darkplaces.git] / gl_rmain.c

diff --git a/gl_rmain.c b/gl_rmain.c
index 280cedfb0fcc215253d26655dceaf8b1f26e795c..bd002566bcbb9253aee75fb0d8659bcb7da513c9 100644 (file)
--- a/gl_rmain.c
+++ b/gl_rmain.c
@@ -248,12 +248,12 @@ void FOG_clear(void)
        }
        r_refdef.fog_density = r_refdef.fog_red = r_refdef.fog_green = r_refdef.fog_blue = 0.0f;
        r_refdef.fog_start = 0;
-       r_refdef.fog_end = 1000000000;
+       r_refdef.fog_alpha = 1;
 }
 
 float FogForDistance(vec_t dist)
 {
-       unsigned int fogmasktableindex = (unsigned int)(bound(0, dist - r_refdef.fog_start, r_refdef.fog_end - r_refdef.fog_start) * r_refdef.fogmasktabledistmultiplier);
+       unsigned int fogmasktableindex = (unsigned int)(dist * r_refdef.fogmasktabledistmultiplier);
        return r_refdef.fogmasktable[min(fogmasktableindex, FOGMASKTABLEWIDTH - 1)];
 }
 
@@ -610,8 +610,6 @@ static const char *builtinshaderstring =
 "uniform float OffsetMapping_Scale;\n"
 "uniform float OffsetMapping_Bias;\n"
 "uniform float FogRangeRecip;\n"
-"uniform float FogStart;\n"
-"uniform float FogLength;\n"
 "\n"
 "uniform myhalf AmbientScale;\n"
 "uniform myhalf DiffuseScale;\n"
@@ -863,8 +861,7 @@ static const char *builtinshaderstring =
 "\n"
 "#ifdef USEFOG\n"
 "      // apply fog\n"
-"      color.rgb = mix(FogColor, color.rgb, myhalf(texture2D(Texture_FogMask, myhvec2(max(0.0, min(length(EyeVectorModelSpace) - FogStart, FogLength))*FogRangeRecip, 0.0))));\n"
-//"      color.rgb = mix(FogColor, color.rgb, myhalf(texture2D(Texture_FogMask, myhvec2(length(EyeVectorModelSpace)*FogRangeRecip, 0.0))));\n"
+"      color.rgb = mix(FogColor, color.rgb, myhalf(texture2D(Texture_FogMask, myhvec2(length(EyeVectorModelSpace)*FogRangeRecip, 0.0))));\n"
 "#endif\n"
 "\n"
 "      gl_FragColor = vec4(color);\n"
@@ -959,8 +956,6 @@ typedef struct r_glsl_permutation_s
        int loc_Color_Pants;
        int loc_Color_Shirt;
        int loc_FogRangeRecip;
-       int loc_FogStart;
-       int loc_FogLength;
        int loc_AmbientScale;
        int loc_DiffuseScale;
        int loc_SpecularScale;
@@ -1092,8 +1087,6 @@ static void R_GLSL_CompilePermutation(const char *filename, int permutation, int
                p->loc_Color_Pants         = qglGetUniformLocationARB(p->program, "Color_Pants");
                p->loc_Color_Shirt         = qglGetUniformLocationARB(p->program, "Color_Shirt");
                p->loc_FogRangeRecip       = qglGetUniformLocationARB(p->program, "FogRangeRecip");
-               p->loc_FogStart            = qglGetUniformLocationARB(p->program, "FogStart");
-               p->loc_FogLength           = qglGetUniformLocationARB(p->program, "FogLength");
                p->loc_AmbientScale        = qglGetUniformLocationARB(p->program, "AmbientScale");
                p->loc_DiffuseScale        = qglGetUniformLocationARB(p->program, "DiffuseScale");
                p->loc_SpecularPower       = qglGetUniformLocationARB(p->program, "SpecularPower");
@@ -1424,8 +1417,6 @@ int R_SetupSurfaceShader(const vec3_t lightcolorbase, qboolean modellighting, fl
                        qglUniform3fARB(r_glsl_permutation->loc_Color_Shirt, 0, 0, 0);
        }
        if (r_glsl_permutation->loc_FogRangeRecip >= 0) qglUniform1fARB(r_glsl_permutation->loc_FogRangeRecip, r_refdef.fograngerecip);
-       if (r_glsl_permutation->loc_FogStart >= 0) qglUniform1fARB(r_glsl_permutation->loc_FogStart, r_refdef.fog_start);
-       if (r_glsl_permutation->loc_FogLength >= 0) qglUniform1fARB(r_glsl_permutation->loc_FogLength, r_refdef.fog_end - r_refdef.fog_start);
        if (r_glsl_permutation->loc_SpecularPower >= 0) qglUniform1fARB(r_glsl_permutation->loc_SpecularPower, rsurface.texture->specularpower);
        if (r_glsl_permutation->loc_OffsetMapping_Scale >= 0) qglUniform1fARB(r_glsl_permutation->loc_OffsetMapping_Scale, r_glsl_offsetmapping_scale.value);
        if (r_glsl_permutation->loc_DistortScaleRefractReflect >= 0) qglUniform4fARB(r_glsl_permutation->loc_DistortScaleRefractReflect, r_water_refractdistort.value * rsurface.texture->refractfactor, r_water_refractdistort.value * rsurface.texture->refractfactor, r_water_reflectdistort.value * rsurface.texture->reflectfactor, r_water_reflectdistort.value * rsurface.texture->reflectfactor);
@@ -3256,12 +3247,8 @@ void R_UpdateVariables(void)
                }
        }
 
-       if (r_refdef.fog_start >= r_refdef.fog_end || r_refdef.fog_start < 0)
-       {
-               r_refdef.fog_start = 0;
-               r_refdef.fog_end = 1000000000;
-               // TODO update fog cvars here too
-       }
+       r_refdef.fog_alpha = min(1, r_refdef.fog_alpha);
+       r_refdef.fog_start = max(0, r_refdef.fog_start);
 
        R_UpdateFogColor();