Justin Marshall
53 lines
1.7 KiB
C++
53 lines
1.7 KiB
C++
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// Store fog and frame fraction value
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float fogVal = fragment.texcoord0.z;
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float frameFrac = fragment.texcoord1.z;
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#ifdef PARTICLE_FP_ALT
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// Remove trans-atlas coordinate mapping if we're using atlas coords
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half2 texcoord0 = ( fragment.texcoord0.xy - $transAtlasScaleBiasInv.zw ) * $transAtlasScaleBiasInv.xy;
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half2 texcoord1 = ( fragment.texcoord1.xy - $transAtlasScaleBiasInv.zw ) * $transAtlasScaleBiasInv.xy;
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#else
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// Simple copy texture coordinates from vertex program output
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half2 texcoord0 = fragment.texcoord0.xy;
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half2 texcoord1 = fragment.texcoord1.xy;
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#endif
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// Sample extra parameters if needed
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#if defined( PARTICLE_FP_MASK_LUT ) || defined( PARTICLE_FP_MOD_TEXCOORD )
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half2 texcoord2;
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texcoord2.x = dot4( fragment.texcoord2.xy, $sMatrix );
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texcoord2.y = dot4( fragment.texcoord2.xy, $tMatrix );
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half4 parm = tex2D( $textureMap, texcoord2 );
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#endif
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// Offset texture coordinates
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#ifdef PARTICLE_FP_MOD_TEXCOORD
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half2 offset = parm.xy * _half2( 2.0 ) - _half2( 1.0 );
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offset *= _half2( $distortionScale.x );
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texcoord0 += offset;
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texcoord1 += offset;
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#endif
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// Sample color from either transMap1 or transMap depending on wheter we're running alternative particle program or not
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#ifdef PARTICLE_FP_ALT
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half4 color = ComputeAnimCrossFadeColor( $transMap1, texcoord0, texcoord1, frameFrac );
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#else
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half4 color = ComputeAnimCrossFadeColor( $transMap, texcoord0, texcoord1, frameFrac );
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#endif
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#ifdef PARTICLE_FP_MASK_LUT
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half3 coordLUT = max( min( color.xyz * _half3( parm.z ), _half3( 1.0 - 0.015625 ) ), _half3( 0.015625 ) );
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color.x = tex2D( $transMap2, half2( coordLUT.x, 0.5 ) ).x;
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color.y = tex2D( $transMap2, half2( coordLUT.y, 0.5 ) ).y;
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color.z = tex2D( $transMap2, half2( coordLUT.z, 0.5 ) ).z;
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#endif
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