added cast_half, cast_half2, cast_half3, cast_half4 macros to avoid

errors on the use of mediump when doing casts on GLES2

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@11271 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/shader_glsl.h b/shader_glsl.h
index d4ce8a1535b91109e69b331736d63394f263d6e4..5d6672bfa927f74fbf8b737b26950daa6a45b055 100644 (file)
--- a/shader_glsl.h
+++ b/shader_glsl.h
@@ -86,11 +86,19 @@
 "//# define myhalf2 half2\n"
 "//# define myhalf3 half3\n"
 "//# define myhalf4 half4\n"
+"//# define cast_myhalf half\n"
+"//# define cast_myhalf2 half2\n"
+"//# define cast_myhalf3 half3\n"
+"//# define cast_myhalf4 half4\n"
 "//#else\n"
 "# define myhalf mediump float\n"
 "# define myhalf2 mediump vec2\n"
 "# define myhalf3 mediump vec3\n"
 "# define myhalf4 mediump vec4\n"
+"# define cast_myhalf float\n"
+"# define cast_myhalf2 vec2\n"
+"# define cast_myhalf3 vec3\n"
+"# define cast_myhalf4 vec4\n"
 "//#endif\n"
 "\n"
 "#ifdef VERTEX_SHADER\n"
@@ -420,9 +428,9 @@
 "      #ifdef USENORMALMAPSCROLLBLEND\n"
 "              vec3 normal = dp_texture2D(Texture_Normal, (TexCoord + vec2(0.08, 0.08)*ClientTime*NormalmapScrollBlend.x*0.5)*NormalmapScrollBlend.y).rgb - vec3(1.0);\n"
 "              normal += dp_texture2D(Texture_Normal, (TexCoord + vec2(-0.06, -0.09)*ClientTime*NormalmapScrollBlend.x)*NormalmapScrollBlend.y*0.75).rgb;\n"
-"              vec2 ScreenTexCoord = SafeScreenTexCoord + vec3(normalize(myhalf3(normal))).xy * DistortScaleRefractReflect.xy;\n"
+"              vec2 ScreenTexCoord = SafeScreenTexCoord + vec3(normalize(cast_myhalf3(normal))).xy * DistortScaleRefractReflect.xy;\n"
 "      #else\n"
-"              vec2 ScreenTexCoord = SafeScreenTexCoord + vec3(normalize(myhalf3(dp_texture2D(Texture_Normal, TexCoord)) - myhalf3(0.5))).xy * DistortScaleRefractReflect.xy;\n"
+"              vec2 ScreenTexCoord = SafeScreenTexCoord + vec3(normalize(cast_myhalf3(dp_texture2D(Texture_Normal, TexCoord)) - cast_myhalf3(0.5))).xy * DistortScaleRefractReflect.xy;\n"
 "      #endif\n"
 "      // FIXME temporary hack to detect the case that the reflection\n"
 "      // gets blackened at edges due to leaving the area that contains actual\n"
@@ -649,14 +657,14 @@
 "#ifdef USEFOGHEIGHTTEXTURE\n"
 "      vec4 fogheightpixel = dp_texture2D(Texture_FogHeightTexture, vec2(1,1) + vec2(FogPlaneVertexDist, FogPlaneViewDist) * (-2.0 * FogHeightFade));\n"
 "      fogfrac = fogheightpixel.a;\n"
-"      return mix(fogheightpixel.rgb * fc, surfacecolor.rgb, dp_texture2D(Texture_FogMask, myhalf2(length(EyeVectorModelSpace)*fogfrac*FogRangeRecip, 0.0)).r);\n"
+"      return mix(fogheightpixel.rgb * fc, surfacecolor.rgb, dp_texture2D(Texture_FogMask, cast_myhalf2(length(EyeVectorModelSpace)*fogfrac*FogRangeRecip, 0.0)).r);\n"
 "#else\n"
 "# ifdef USEFOGOUTSIDE\n"
 "      fogfrac = min(0.0, FogPlaneVertexDist) / (FogPlaneVertexDist - FogPlaneViewDist) * min(1.0, min(0.0, FogPlaneVertexDist) * FogHeightFade);\n"
 "# else\n"
 "      fogfrac = FogPlaneViewDist / (FogPlaneViewDist - max(0.0, FogPlaneVertexDist)) * min(1.0, (min(0.0, FogPlaneVertexDist) + FogPlaneViewDist) * FogHeightFade);\n"
 "# endif\n"
-"      return mix(fc, surfacecolor.rgb, dp_texture2D(Texture_FogMask, myhalf2(length(EyeVectorModelSpace)*fogfrac*FogRangeRecip, 0.0)).r);\n"
+"      return mix(fc, surfacecolor.rgb, dp_texture2D(Texture_FogMask, cast_myhalf2(length(EyeVectorModelSpace)*fogfrac*FogRangeRecip, 0.0)).r);\n"
 "#endif\n"
 "}\n"
 "#endif\n"
@@ -944,26 +952,26 @@
 "      position.xy = ModelViewPosition.xy * (position.z / ModelViewPosition.z);\n"
 "      // decode viewspace pixel normal\n"
 "      myhalf4 normalmap = dp_texture2D(Texture_ScreenNormalMap, ScreenTexCoord);\n"
-"      myhalf3 surfacenormal = normalize(normalmap.rgb - myhalf3(0.5,0.5,0.5));\n"
+"      myhalf3 surfacenormal = normalize(normalmap.rgb - cast_myhalf3(0.5,0.5,0.5));\n"
 "      // surfacenormal = pixel normal in viewspace\n"
 "      // LightVector = pixel to light in viewspace\n"
 "      // CubeVector = position in lightspace\n"
 "      // eyevector = pixel to view in viewspace\n"
 "      vec3 CubeVector = vec3(ViewToLight * vec4(position,1));\n"
-"      myhalf fade = myhalf(dp_texture2D(Texture_Attenuation, vec2(length(CubeVector), 0.0)));\n"
+"      myhalf fade = cast_myhalf(dp_texture2D(Texture_Attenuation, vec2(length(CubeVector), 0.0)));\n"
 "#ifdef USEDIFFUSE\n"
 "      // calculate diffuse shading\n"
-"      myhalf3 lightnormal = myhalf3(normalize(LightPosition - position));\n"
-"      myhalf diffuse = myhalf(max(float(dot(surfacenormal, lightnormal)), 0.0));\n"
+"      myhalf3 lightnormal = cast_myhalf3(normalize(LightPosition - position));\n"
+"      myhalf diffuse = cast_myhalf(max(float(dot(surfacenormal, lightnormal)), 0.0));\n"
 "#endif\n"
 "#ifdef USESPECULAR\n"
 "      // calculate directional shading\n"
 "      vec3 eyevector = position * -1.0;\n"
 "#  ifdef USEEXACTSPECULARMATH\n"
-"      myhalf specular = pow(myhalf(max(float(dot(reflect(lightnormal, surfacenormal), normalize(eyevector)))*-1.0, 0.0)), SpecularPower * normalmap.a);\n"
+"      myhalf specular = pow(cast_myhalf(max(float(dot(reflect(lightnormal, surfacenormal), normalize(eyevector)))*-1.0, 0.0)), SpecularPower * normalmap.a);\n"
 "#  else\n"
-"      myhalf3 specularnormal = normalize(lightnormal + myhalf3(normalize(eyevector)));\n"
-"      myhalf specular = pow(myhalf(max(float(dot(surfacenormal, specularnormal)), 0.0)), SpecularPower * normalmap.a);\n"
+"      myhalf3 specularnormal = normalize(lightnormal + cast_myhalf3(normalize(eyevector)));\n"
+"      myhalf specular = pow(cast_myhalf(max(float(dot(surfacenormal, specularnormal)), 0.0)), SpecularPower * normalmap.a);\n"
 "#  endif\n"
 "#endif\n"
 "\n"
@@ -1160,44 +1168,44 @@
 "#endif\n"
 "\n"
 "      // combine the diffuse textures (base, pants, shirt)\n"
-"      myhalf4 color = myhalf4(offsetMappedTexture2D(Texture_Color));\n"
+"      myhalf4 color = cast_myhalf4(offsetMappedTexture2D(Texture_Color));\n"
 "#ifdef USEALPHAKILL\n"
 "      if (color.a < 0.5)\n"
 "              discard;\n"
 "#endif\n"
 "      color.a *= Alpha;\n"
 "#ifdef USECOLORMAPPING\n"
-"      color.rgb += myhalf3(offsetMappedTexture2D(Texture_Pants)) * Color_Pants + myhalf3(offsetMappedTexture2D(Texture_Shirt)) * Color_Shirt;\n"
+"      color.rgb += cast_myhalf3(offsetMappedTexture2D(Texture_Pants)) * Color_Pants + cast_myhalf3(offsetMappedTexture2D(Texture_Shirt)) * Color_Shirt;\n"
 "#endif\n"
 "#ifdef USEVERTEXTEXTUREBLEND\n"
 "#ifdef USEBOTHALPHAS\n"
-"      myhalf4 color2 = myhalf4(dp_texture2D(Texture_SecondaryColor, TexCoord2));\n"
-"      myhalf terrainblend = clamp(myhalf(VertexColor.a) * color.a, myhalf(1.0 - color2.a), myhalf(1.0));\n"
+"      myhalf4 color2 = cast_myhalf4(dp_texture2D(Texture_SecondaryColor, TexCoord2));\n"
+"      myhalf terrainblend = clamp(cast_myhalf(VertexColor.a) * color.a, cast_myhalf(1.0 - color2.a), cast_myhalf(1.0));\n"
 "      color.rgb = mix(color2.rgb, color.rgb, terrainblend);\n"
 "#else\n"
-"      myhalf terrainblend = clamp(myhalf(VertexColor.a) * color.a * 2.0 - 0.5, myhalf(0.0), myhalf(1.0));\n"
-"      //myhalf terrainblend = min(myhalf(VertexColor.a) * color.a * 2.0, myhalf(1.0));\n"
-"      //myhalf terrainblend = myhalf(VertexColor.a) * color.a > 0.5;\n"
-"      color.rgb = mix(myhalf3(dp_texture2D(Texture_SecondaryColor, TexCoord2)), color.rgb, terrainblend);\n"
+"      myhalf terrainblend = clamp(cast_myhalf(VertexColor.a) * color.a * 2.0 - 0.5, cast_myhalf(0.0), cast_myhalf(1.0));\n"
+"      //myhalf terrainblend = min(cast_myhalf(VertexColor.a) * color.a * 2.0, cast_myhalf(1.0));\n"
+"      //myhalf terrainblend = cast_myhalf(VertexColor.a) * color.a > 0.5;\n"
+"      color.rgb = mix(cast_myhalf3(dp_texture2D(Texture_SecondaryColor, TexCoord2)), color.rgb, terrainblend);\n"
 "#endif\n"
 "      color.a = 1.0;\n"
-"      //color = mix(myhalf4(1, 0, 0, 1), color, terrainblend);\n"
+"      //color = mix(cast_myhalf4(1, 0, 0, 1), color, terrainblend);\n"
 "#endif\n"
 "\n"
 "      // get the surface normal\n"
 "#ifdef USEVERTEXTEXTUREBLEND\n"
-"      myhalf3 surfacenormal = normalize(mix(myhalf3(dp_texture2D(Texture_SecondaryNormal, TexCoord2)), myhalf3(offsetMappedTexture2D(Texture_Normal)), terrainblend) - myhalf3(0.5, 0.5, 0.5));\n"
+"      myhalf3 surfacenormal = normalize(mix(cast_myhalf3(dp_texture2D(Texture_SecondaryNormal, TexCoord2)), cast_myhalf3(offsetMappedTexture2D(Texture_Normal)), terrainblend) - cast_myhalf3(0.5, 0.5, 0.5));\n"
 "#else\n"
-"      myhalf3 surfacenormal = normalize(myhalf3(offsetMappedTexture2D(Texture_Normal)) - myhalf3(0.5, 0.5, 0.5));\n"
+"      myhalf3 surfacenormal = normalize(cast_myhalf3(offsetMappedTexture2D(Texture_Normal)) - cast_myhalf3(0.5, 0.5, 0.5));\n"
 "#endif\n"
 "\n"
 "      // get the material colors\n"
 "      myhalf3 diffusetex = color.rgb;\n"
 "#if defined(USESPECULAR) || defined(USEDEFERREDLIGHTMAP)\n"
 "# ifdef USEVERTEXTEXTUREBLEND\n"
-"      myhalf4 glosstex = mix(myhalf4(dp_texture2D(Texture_SecondaryGloss, TexCoord2)), myhalf4(offsetMappedTexture2D(Texture_Gloss)), terrainblend);\n"
+"      myhalf4 glosstex = mix(cast_myhalf4(dp_texture2D(Texture_SecondaryGloss, TexCoord2)), cast_myhalf4(offsetMappedTexture2D(Texture_Gloss)), terrainblend);\n"
 "# else\n"
-"      myhalf4 glosstex = myhalf4(offsetMappedTexture2D(Texture_Gloss));\n"
+"      myhalf4 glosstex = cast_myhalf4(offsetMappedTexture2D(Texture_Gloss));\n"
 "# endif\n"
 "#endif\n"
 "\n"
@@ -1205,7 +1213,7 @@
 "      vec3 TangentReflectVector = reflect(-EyeVectorFogDepth.xyz, surfacenormal);\n"
 "      vec3 ModelReflectVector = TangentReflectVector.x * VectorS.xyz + TangentReflectVector.y * VectorT.xyz + TangentReflectVector.z * VectorR.xyz;\n"
 "      vec3 ReflectCubeTexCoord = vec3(ModelToReflectCube * vec4(ModelReflectVector, 0));\n"
-"      diffusetex += myhalf3(offsetMappedTexture2D(Texture_ReflectMask)) * myhalf3(dp_textureCube(Texture_ReflectCube, ReflectCubeTexCoord));\n"
+"      diffusetex += cast_myhalf3(offsetMappedTexture2D(Texture_ReflectMask)) * cast_myhalf3(dp_textureCube(Texture_ReflectCube, ReflectCubeTexCoord));\n"
 "#endif\n"
 "\n"
 "\n"
@@ -1214,15 +1222,15 @@
 "#ifdef MODE_LIGHTSOURCE\n"
 "      // light source\n"
 "#ifdef USEDIFFUSE\n"
-"      myhalf3 lightnormal = myhalf3(normalize(LightVector));\n"
-"      myhalf diffuse = myhalf(max(float(dot(surfacenormal, lightnormal)), 0.0));\n"
+"      myhalf3 lightnormal = cast_myhalf3(normalize(LightVector));\n"
+"      myhalf diffuse = cast_myhalf(max(float(dot(surfacenormal, lightnormal)), 0.0));\n"
 "      color.rgb = diffusetex * (Color_Ambient + diffuse * Color_Diffuse);\n"
 "#ifdef USESPECULAR\n"
 "#ifdef USEEXACTSPECULARMATH\n"
-"      myhalf specular = pow(myhalf(max(float(dot(reflect(lightnormal, surfacenormal), normalize(EyeVectorFogDepth.xyz)))*-1.0, 0.0)), SpecularPower * glosstex.a);\n"
+"      myhalf specular = pow(cast_myhalf(max(float(dot(reflect(lightnormal, surfacenormal), normalize(EyeVectorFogDepth.xyz)))*-1.0, 0.0)), SpecularPower * glosstex.a);\n"
 "#else\n"
-"      myhalf3 specularnormal = normalize(lightnormal + myhalf3(normalize(EyeVectorFogDepth.xyz)));\n"
-"      myhalf specular = pow(myhalf(max(float(dot(surfacenormal, specularnormal)), 0.0)), SpecularPower * glosstex.a);\n"
+"      myhalf3 specularnormal = normalize(lightnormal + cast_myhalf3(normalize(EyeVectorFogDepth.xyz)));\n"
+"      myhalf specular = pow(cast_myhalf(max(float(dot(surfacenormal, specularnormal)), 0.0)), SpecularPower * glosstex.a);\n"
 "#endif\n"
 "      color.rgb += glosstex.rgb * (specular * Color_Specular);\n"
 "#endif\n"
@@ -1230,12 +1238,12 @@
 "      color.rgb = diffusetex * Color_Ambient;\n"
 "#endif\n"
 "      color.rgb *= LightColor;\n"
-"      color.rgb *= myhalf(dp_texture2D(Texture_Attenuation, vec2(length(CubeVector), 0.0)));\n"
+"      color.rgb *= cast_myhalf(dp_texture2D(Texture_Attenuation, vec2(length(CubeVector), 0.0)));\n"
 "#if defined(USESHADOWMAP2D)\n"
 "      color.rgb *= ShadowMapCompare(CubeVector);\n"
 "#endif\n"
 "# ifdef USECUBEFILTER\n"
-"      color.rgb *= myhalf3(dp_textureCube(Texture_Cube, CubeVector));\n"
+"      color.rgb *= cast_myhalf3(dp_textureCube(Texture_Cube, CubeVector));\n"
 "# endif\n"
 "#endif // MODE_LIGHTSOURCE\n"
 "\n"
@@ -1245,20 +1253,20 @@
 "#ifdef MODE_LIGHTDIRECTION\n"
 "      #define SHADING\n"
 "      #ifdef USEDIFFUSE\n"
-"              myhalf3 lightnormal = myhalf3(normalize(LightVector));\n"
+"              myhalf3 lightnormal = cast_myhalf3(normalize(LightVector));\n"
 "      #endif\n"
 "      #define lightcolor LightColor\n"
 "#endif // MODE_LIGHTDIRECTION\n"
 "#ifdef MODE_LIGHTDIRECTIONMAP_MODELSPACE\n"
 "   #define SHADING\n"
 "      // deluxemap lightmapping using light vectors in modelspace (q3map2 -light -deluxe)\n"
-"      myhalf3 lightnormal_modelspace = myhalf3(dp_texture2D(Texture_Deluxemap, TexCoordSurfaceLightmap.zw)) * 2.0 + myhalf3(-1.0, -1.0, -1.0);\n"
-"      myhalf3 lightcolor = myhalf3(dp_texture2D(Texture_Lightmap, TexCoordSurfaceLightmap.zw));\n"
+"      myhalf3 lightnormal_modelspace = cast_myhalf3(dp_texture2D(Texture_Deluxemap, TexCoordSurfaceLightmap.zw)) * 2.0 + cast_myhalf3(-1.0, -1.0, -1.0);\n"
+"      myhalf3 lightcolor = cast_myhalf3(dp_texture2D(Texture_Lightmap, TexCoordSurfaceLightmap.zw));\n"
 "      // convert modelspace light vector to tangentspace\n"
 "      myhalf3 lightnormal;\n"
-"      lightnormal.x = dot(lightnormal_modelspace, myhalf3(VectorS));\n"
-"      lightnormal.y = dot(lightnormal_modelspace, myhalf3(VectorT));\n"
-"      lightnormal.z = dot(lightnormal_modelspace, myhalf3(VectorR));\n"
+"      lightnormal.x = dot(lightnormal_modelspace, cast_myhalf3(VectorS));\n"
+"      lightnormal.y = dot(lightnormal_modelspace, cast_myhalf3(VectorT));\n"
+"      lightnormal.z = dot(lightnormal_modelspace, cast_myhalf3(VectorR));\n"
 "      lightnormal = normalize(lightnormal); // VectorS/T/R are not always perfectly normalized, and EXACTSPECULARMATH is very picky about this\n"
 "      // calculate directional shading (and undoing the existing angle attenuation on the lightmap by the division)\n"
 "      // note that q3map2 is too stupid to calculate proper surface normals when q3map_nonplanar\n"
@@ -1274,33 +1282,33 @@
 "#ifdef MODE_LIGHTDIRECTIONMAP_TANGENTSPACE\n"
 "   #define SHADING\n"
 "      // deluxemap lightmapping using light vectors in tangentspace (hmap2 -light)\n"
-"      myhalf3 lightnormal = myhalf3(dp_texture2D(Texture_Deluxemap, TexCoordSurfaceLightmap.zw)) * 2.0 + myhalf3(-1.0, -1.0, -1.0);\n"
-"      myhalf3 lightcolor = myhalf3(dp_texture2D(Texture_Lightmap, TexCoordSurfaceLightmap.zw));\n"
+"      myhalf3 lightnormal = cast_myhalf3(dp_texture2D(Texture_Deluxemap, TexCoordSurfaceLightmap.zw)) * 2.0 + cast_myhalf3(-1.0, -1.0, -1.0);\n"
+"      myhalf3 lightcolor = cast_myhalf3(dp_texture2D(Texture_Lightmap, TexCoordSurfaceLightmap.zw));\n"
 "#endif\n"
 "#if defined(MODE_LIGHTDIRECTIONMAP_FORCED_LIGHTMAP) || defined(MODE_LIGHTDIRECTIONMAP_FORCED_VERTEXCOLOR)\n"
 "      #define SHADING\n"
 "      // forced deluxemap on lightmapped/vertexlit surfaces\n"
-"      myhalf3 lightnormal = myhalf3(0.0, 0.0, 1.0);\n"
+"      myhalf3 lightnormal = cast_myhalf3(0.0, 0.0, 1.0);\n"
 "   #ifdef USELIGHTMAP\n"
-"              myhalf3 lightcolor = myhalf3(dp_texture2D(Texture_Lightmap, TexCoordSurfaceLightmap.zw));\n"
+"              myhalf3 lightcolor = cast_myhalf3(dp_texture2D(Texture_Lightmap, TexCoordSurfaceLightmap.zw));\n"
 "   #else\n"
-"              myhalf3 lightcolor = myhalf3(VertexColor.rgb);\n"
+"              myhalf3 lightcolor = cast_myhalf3(VertexColor.rgb);\n"
 "   #endif\n"
 "#endif\n"
 "#ifdef MODE_FAKELIGHT\n"
 "      #define SHADING\n"
-"      myhalf3 lightnormal = myhalf3(normalize(EyeVectorFogDepth.xyz));\n"
-"      myhalf3 lightcolor = myhalf3(1.0);\n"
+"      myhalf3 lightnormal = cast_myhalf3(normalize(EyeVectorFogDepth.xyz));\n"
+"      myhalf3 lightcolor = cast_myhalf3(1.0);\n"
 "#endif // MODE_FAKELIGHT\n"
 "\n"
 "\n"
 "\n"
 "\n"
 "#ifdef MODE_LIGHTMAP\n"
-"      color.rgb = diffusetex * (Color_Ambient + myhalf3(dp_texture2D(Texture_Lightmap, TexCoordSurfaceLightmap.zw)) * Color_Diffuse);\n"
+"      color.rgb = diffusetex * (Color_Ambient + cast_myhalf3(dp_texture2D(Texture_Lightmap, TexCoordSurfaceLightmap.zw)) * Color_Diffuse);\n"
 "#endif // MODE_LIGHTMAP\n"
 "#ifdef MODE_VERTEXCOLOR\n"
-"      color.rgb = diffusetex * (Color_Ambient + myhalf3(VertexColor.rgb) * Color_Diffuse);\n"
+"      color.rgb = diffusetex * (Color_Ambient + cast_myhalf3(VertexColor.rgb) * Color_Diffuse);\n"
 "#endif // MODE_VERTEXCOLOR\n"
 "#ifdef MODE_FLATCOLOR\n"
 "      color.rgb = diffusetex * Color_Ambient;\n"
@@ -1311,13 +1319,13 @@
 "\n"
 "#ifdef SHADING\n"
 "# ifdef USEDIFFUSE\n"
-"      myhalf diffuse = myhalf(max(float(dot(surfacenormal, lightnormal)), 0.0));\n"
+"      myhalf diffuse = cast_myhalf(max(float(dot(surfacenormal, lightnormal)), 0.0));\n"
 "#  ifdef USESPECULAR\n"
 "#   ifdef USEEXACTSPECULARMATH\n"
-"      myhalf specular = pow(myhalf(max(float(dot(reflect(lightnormal, surfacenormal), normalize(EyeVectorFogDepth.xyz)))*-1.0, 0.0)), SpecularPower * glosstex.a);\n"
+"      myhalf specular = pow(cast_myhalf(max(float(dot(reflect(lightnormal, surfacenormal), normalize(EyeVectorFogDepth.xyz)))*-1.0, 0.0)), SpecularPower * glosstex.a);\n"
 "#   else\n"
-"      myhalf3 specularnormal = normalize(lightnormal + myhalf3(normalize(EyeVectorFogDepth.xyz)));\n"
-"      myhalf specular = pow(myhalf(max(float(dot(surfacenormal, specularnormal)), 0.0)), SpecularPower * glosstex.a);\n"
+"      myhalf3 specularnormal = normalize(lightnormal + cast_myhalf3(normalize(EyeVectorFogDepth.xyz)));\n"
+"      myhalf specular = pow(cast_myhalf(max(float(dot(surfacenormal, specularnormal)), 0.0)), SpecularPower * glosstex.a);\n"
 "#   endif\n"
 "      color.rgb = diffusetex * Color_Ambient + (diffusetex * Color_Diffuse * diffuse + glosstex.rgb * Color_Specular * specular) * lightcolor;\n"
 "#  else\n"
@@ -1334,40 +1342,40 @@
 "\n"
 "#ifdef USEDEFERREDLIGHTMAP\n"
 "      vec2 ScreenTexCoord = gl_FragCoord.xy * PixelToScreenTexCoord;\n"
-"      color.rgb += diffusetex * myhalf3(dp_texture2D(Texture_ScreenDiffuse, ScreenTexCoord)) * DeferredMod_Diffuse;\n"
-"      color.rgb += glosstex.rgb * myhalf3(dp_texture2D(Texture_ScreenSpecular, ScreenTexCoord)) * DeferredMod_Specular;\n"
+"      color.rgb += diffusetex * cast_myhalf3(dp_texture2D(Texture_ScreenDiffuse, ScreenTexCoord)) * DeferredMod_Diffuse;\n"
+"      color.rgb += glosstex.rgb * cast_myhalf3(dp_texture2D(Texture_ScreenSpecular, ScreenTexCoord)) * DeferredMod_Specular;\n"
 "#endif\n"
 "\n"
 "#ifdef USEBOUNCEGRID\n"
 "#ifdef USEBOUNCEGRIDDIRECTIONAL\n"
-"//    myhalf4 bouncegrid_coeff1 = myhalf4(dp_texture3D(Texture_BounceGrid, BounceGridTexCoord                        ));\n"
-"//    myhalf4 bouncegrid_coeff2 = myhalf4(dp_texture3D(Texture_BounceGrid, BounceGridTexCoord + vec3(0.0, 0.0, 0.125))) * 2.0 + myhalf4(-1.0, -1.0, -1.0, -1.0);\n"
-"      myhalf4 bouncegrid_coeff3 = myhalf4(dp_texture3D(Texture_BounceGrid, BounceGridTexCoord + vec3(0.0, 0.0, 0.250)));\n"
-"      myhalf4 bouncegrid_coeff4 = myhalf4(dp_texture3D(Texture_BounceGrid, BounceGridTexCoord + vec3(0.0, 0.0, 0.375)));\n"
-"      myhalf4 bouncegrid_coeff5 = myhalf4(dp_texture3D(Texture_BounceGrid, BounceGridTexCoord + vec3(0.0, 0.0, 0.500)));\n"
-"      myhalf4 bouncegrid_coeff6 = myhalf4(dp_texture3D(Texture_BounceGrid, BounceGridTexCoord + vec3(0.0, 0.0, 0.625)));\n"
-"      myhalf4 bouncegrid_coeff7 = myhalf4(dp_texture3D(Texture_BounceGrid, BounceGridTexCoord + vec3(0.0, 0.0, 0.750)));\n"
-"      myhalf4 bouncegrid_coeff8 = myhalf4(dp_texture3D(Texture_BounceGrid, BounceGridTexCoord + vec3(0.0, 0.0, 0.875)));\n"
+"//    myhalf4 bouncegrid_coeff1 = cast_myhalf4(dp_texture3D(Texture_BounceGrid, BounceGridTexCoord                        ));\n"
+"//    myhalf4 bouncegrid_coeff2 = cast_myhalf4(dp_texture3D(Texture_BounceGrid, BounceGridTexCoord + vec3(0.0, 0.0, 0.125))) * 2.0 + cast_myhalf4(-1.0, -1.0, -1.0, -1.0);\n"
+"      myhalf4 bouncegrid_coeff3 = cast_myhalf4(dp_texture3D(Texture_BounceGrid, BounceGridTexCoord + vec3(0.0, 0.0, 0.250)));\n"
+"      myhalf4 bouncegrid_coeff4 = cast_myhalf4(dp_texture3D(Texture_BounceGrid, BounceGridTexCoord + vec3(0.0, 0.0, 0.375)));\n"
+"      myhalf4 bouncegrid_coeff5 = cast_myhalf4(dp_texture3D(Texture_BounceGrid, BounceGridTexCoord + vec3(0.0, 0.0, 0.500)));\n"
+"      myhalf4 bouncegrid_coeff6 = cast_myhalf4(dp_texture3D(Texture_BounceGrid, BounceGridTexCoord + vec3(0.0, 0.0, 0.625)));\n"
+"      myhalf4 bouncegrid_coeff7 = cast_myhalf4(dp_texture3D(Texture_BounceGrid, BounceGridTexCoord + vec3(0.0, 0.0, 0.750)));\n"
+"      myhalf4 bouncegrid_coeff8 = cast_myhalf4(dp_texture3D(Texture_BounceGrid, BounceGridTexCoord + vec3(0.0, 0.0, 0.875)));\n"
 "      myhalf3 bouncegrid_dir = normalize(mat3(BounceGridMatrix) * (surfacenormal.x * VectorS.xyz + surfacenormal.y * VectorT.xyz + surfacenormal.z * VectorR.xyz));\n"
-"      myhalf3 bouncegrid_dirp = max(myhalf3(0.0, 0.0, 0.0), bouncegrid_dir);\n"
-"      myhalf3 bouncegrid_dirn = max(myhalf3(0.0, 0.0, 0.0), -bouncegrid_dir);\n"
-"//    bouncegrid_dirp  = bouncegrid_dirn = myhalf3(1.0,1.0,1.0);\n"
-"      myhalf3 bouncegrid_light = myhalf3(\n"
+"      myhalf3 bouncegrid_dirp = max(cast_myhalf3(0.0, 0.0, 0.0), bouncegrid_dir);\n"
+"      myhalf3 bouncegrid_dirn = max(cast_myhalf3(0.0, 0.0, 0.0), -bouncegrid_dir);\n"
+"//    bouncegrid_dirp  = bouncegrid_dirn = cast_myhalf3(1.0,1.0,1.0);\n"
+"      myhalf3 bouncegrid_light = cast_myhalf3(\n"
 "              dot(bouncegrid_coeff3.xyz, bouncegrid_dirp) + dot(bouncegrid_coeff6.xyz, bouncegrid_dirn),\n"
 "              dot(bouncegrid_coeff4.xyz, bouncegrid_dirp) + dot(bouncegrid_coeff7.xyz, bouncegrid_dirn),\n"
 "              dot(bouncegrid_coeff5.xyz, bouncegrid_dirp) + dot(bouncegrid_coeff8.xyz, bouncegrid_dirn));\n"
 "      color.rgb += diffusetex * bouncegrid_light * BounceGridIntensity;\n"
 "//    color.rgb = bouncegrid_dir.rgb * 0.5 + vec3(0.5, 0.5, 0.5);\n"
 "#else\n"
-"      color.rgb += diffusetex * myhalf3(dp_texture3D(Texture_BounceGrid, BounceGridTexCoord)) * BounceGridIntensity;\n"
+"      color.rgb += diffusetex * cast_myhalf3(dp_texture3D(Texture_BounceGrid, BounceGridTexCoord)) * BounceGridIntensity;\n"
 "#endif\n"
 "#endif\n"
 "\n"
 "#ifdef USEGLOW\n"
 "#ifdef USEVERTEXTEXTUREBLEND\n"
-"      color.rgb += mix(myhalf3(dp_texture2D(Texture_SecondaryGlow, TexCoord2)), myhalf3(offsetMappedTexture2D(Texture_Glow)), terrainblend) * Color_Glow;\n"
+"      color.rgb += mix(cast_myhalf3(dp_texture2D(Texture_SecondaryGlow, TexCoord2)), cast_myhalf3(offsetMappedTexture2D(Texture_Glow)), terrainblend) * Color_Glow;\n"
 "#else\n"
-"      color.rgb += myhalf3(offsetMappedTexture2D(Texture_Glow)) * Color_Glow;\n"
+"      color.rgb += cast_myhalf3(offsetMappedTexture2D(Texture_Glow)) * Color_Glow;\n"
 "#endif\n"
 "#endif\n"
 "\n"
@@ -1378,7 +1386,7 @@
 "      // reflection must come last because it already contains exactly the correct fog (the reflection render preserves camera distance from the plane, it only flips the side) and ContrastBoost/SceneBrightness\n"
 "#ifdef USEREFLECTION\n"
 "      vec4 ScreenScaleRefractReflectIW = ScreenScaleRefractReflect * (1.0 / ModelViewProjectionPosition.w);\n"
-"      //vec4 ScreenTexCoord = (ModelViewProjectionPosition.xyxy + normalize(myhalf3(offsetMappedTexture2D(Texture_Normal)) - myhalf3(0.5)).xyxy * DistortScaleRefractReflect * 100) * ScreenScaleRefractReflectIW + ScreenCenterRefractReflect;\n"
+"      //vec4 ScreenTexCoord = (ModelViewProjectionPosition.xyxy + normalize(cast_myhalf3(offsetMappedTexture2D(Texture_Normal)) - cast_myhalf3(0.5)).xyxy * DistortScaleRefractReflect * 100) * ScreenScaleRefractReflectIW + ScreenCenterRefractReflect;\n"
 "      vec2 SafeScreenTexCoord = ModelViewProjectionPosition.xy * ScreenScaleRefractReflectIW.zw + ScreenCenterRefractReflect.zw;\n"
 "      #ifdef USENORMALMAPSCROLLBLEND\n"
 "# ifdef USEOFFSETMAPPING\n"
@@ -1387,9 +1395,9 @@
 "              vec3 normal = dp_texture2D(Texture_Normal, (TexCoord + vec2(0.08, 0.08)*ClientTime*NormalmapScrollBlend.x*0.5)*NormalmapScrollBlend.y).rgb - vec3(1.0);\n"
 "# endif\n"
 "              normal += dp_texture2D(Texture_Normal, (TexCoord + vec2(-0.06, -0.09)*ClientTime*NormalmapScrollBlend.x)*NormalmapScrollBlend.y*0.75).rgb;\n"
-"              vec2 ScreenTexCoord = SafeScreenTexCoord + vec3(normalize(myhalf3(normal))).xy * DistortScaleRefractReflect.zw;\n"
+"              vec2 ScreenTexCoord = SafeScreenTexCoord + vec3(normalize(cast_myhalf3(normal))).xy * DistortScaleRefractReflect.zw;\n"
 "      #else\n"
-"              vec2 ScreenTexCoord = SafeScreenTexCoord + vec3(normalize(myhalf3(offsetMappedTexture2D(Texture_Normal)) - myhalf3(0.5))).xy * DistortScaleRefractReflect.zw;\n"
+"              vec2 ScreenTexCoord = SafeScreenTexCoord + vec3(normalize(cast_myhalf3(offsetMappedTexture2D(Texture_Normal)) - cast_myhalf3(0.5))).xy * DistortScaleRefractReflect.zw;\n"
 "      #endif\n"
 "      // FIXME temporary hack to detect the case that the reflection\n"
 "      // gets blackened at edges due to leaving the area that contains actual\n"
@@ -1401,7 +1409,7 @@
 "      f      *= min(1.0, length(dp_texture2D(Texture_Reflection, ScreenTexCoord + vec2(-0.01, 0.01)).rgb) / 0.05);\n"
 "      f      *= min(1.0, length(dp_texture2D(Texture_Reflection, ScreenTexCoord + vec2(-0.01, -0.01)).rgb) / 0.05);\n"
 "      ScreenTexCoord = mix(SafeScreenTexCoord, ScreenTexCoord, f);\n"
-"      color.rgb = mix(color.rgb, myhalf3(dp_texture2D(Texture_Reflection, ScreenTexCoord)) * ReflectColor.rgb, ReflectColor.a);\n"
+"      color.rgb = mix(color.rgb, cast_myhalf3(dp_texture2D(Texture_Reflection, ScreenTexCoord)) * ReflectColor.rgb, ReflectColor.a);\n"
 "#endif\n"
 "\n"
 "      dp_FragColor = vec4(color);\n"