Justin Marshall
54 lines
1.6 KiB
Plaintext
54 lines
1.6 KiB
Plaintext
{
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inherit skyDrawAndScroll
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parms {
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stageSort sortEmitOnly
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exposure exposure * skyGlarePreScale
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}
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state {
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blend GL_ONE GL_ONE
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depthmask
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twosided
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}
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hlsl_fp {
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float4 YCoCg = tex2D( $spare1Map, fragment.texcoord0.xy );
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// convert the diffuse from YCoCg to RGB
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half4 skyCol;
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YCoCg.z = ( YCoCg.z * 31.875 ) + 1.0; //z = z * 255.0/8.0 + 1.0
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YCoCg.z = 1.0 / YCoCg.z;
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YCoCg.xy *= YCoCg.z;
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skyCol.x = dot4( YCoCg, matrixCoCg1YtoRGB1X );
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skyCol.y = dot4( YCoCg, matrixCoCg1YtoRGB1Y );
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skyCol.z = dot4( YCoCg, matrixCoCg1YtoRGB1Z );
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skyCol.w = 1.0;
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skyCol *= $exposure;
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// fog distance is fog altitude / normalized Z component
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float dist = ( $skyFogCutoffHeight.x / normalize( fragment.texcoord3.xyz ).z ) * $fogScale.x; // combine fogScale with fogCutoffHeight?
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dist = saturate( exp2( -dist ));
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half3 final = skyCol.xyz;
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// add the scrolling second cloud layer
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half4 cloudCol = tex2D( $transMap, fragment.texcoord1.xy ) * $cloudScale;
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final += cloudCol.xyz * dist;
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// Apply additional additive pass
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half4 mask = tex2D( $fadeMap, fragment.texcoord2.xy );
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half4 cloudCol1 = tex2D( $transMap1, fragment.texcoord2.xy ) * $cloudScale1;
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#if 1 // cloud test for Justin
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final = lerp( final, cloudCol1.xyz, mask.x * dist );
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#else
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final += cloudCol1.xyz * mask.xyz * dist;
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#endif
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result.color0.xyz = final;
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// store fog factor in alpha so additive passes can be blended on
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//result.color0.w = dist;
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// make sure alpha is always 1.0 so the radiosity programs
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// don't think they are seeing back sides of surfaces
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result.color0.w = 1.0;
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}
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} |