63 lines
1.8 KiB
HLSL
63 lines
1.8 KiB
HLSL
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// URP uses _half
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void CTIBillboardFragment_half (
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in float4 UV,
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in real2 BlendCv,
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in float4 ScreenPosRaw,
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out real3 o_Albedo,
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out real o_Alpha,
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out real3 o_NormalTS,
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out real o_Smoothness,
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out real o_Occlusion,
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out real o_Thickness
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) {
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real4 sampleA = SAMPLE_TEXTURE2D(_BaseMap, sampler_BaseMap, UV.xy);
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real4 n_sampleA = SAMPLE_TEXTURE2D(_BumpSpecMap, sampler_BumpSpecMap, UV.xy);
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real blend = saturate(1.0 - BlendCv.x);
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if (_BlendBB)
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{
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real4 sampleB = SAMPLE_TEXTURE2D(_BaseMap, sampler_BaseMap, UV.zw);
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real4 n_sampleB = SAMPLE_TEXTURE2D(_BumpSpecMap, sampler_BumpSpecMap, UV.zw);
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// Dither
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if (_BlendBBDithering)
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{
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float2 screenPos = floor( (ScreenPosRaw.xy / ScreenPosRaw.w) * _ScreenParams.xy);
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real alphaClip = InterleavedGradientNoise(float4(screenPos, ScreenPosRaw.zw), (real)0.0);
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// real alphaClip = GenerateHashedRandomFloat( asuint((int2)screenPos.xy) );
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real blend = BlendCv.x;
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blend = saturate( ((real)1.0 - blend - alphaClip) * (real)1000.0);
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}
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sampleA.a = sampleA.a * blend;
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sampleB.a = sampleB.a * (1.0 - blend);
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sampleA.rgb = sampleA.rgb * blend;
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sampleA.rgb += sampleB.rgb * (1.0 - blend);
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//n_sampleA = n_sampleA * blend + n_sampleB * (1.0 - blend); // Needs dithering!
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n_sampleA = lerp(n_sampleA, n_sampleB, sampleB.aaaa);
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sampleA.a += sampleB.a;
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}
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// Up is flipped!
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n_sampleA.g = 1.0 - n_sampleA.g;
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real3 normalTS = UnpackNormalAG(n_sampleA, _BumpScale);
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// Alpha Leak
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o_Occlusion = (sampleA.a <= _AlphaLeak) ? (real)1.0 : sampleA.a; // Eliminate alpha leaking into ao
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// Add Color Variation
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o_Albedo = lerp(sampleA.rgb, (sampleA.rgb + _HueVariation.rgb) * (real)0.5, (BlendCv.y * _HueVariation.a).xxx );
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o_Alpha = sampleA.a;
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o_NormalTS = normalTS;
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o_Smoothness = n_sampleA.b * _Smoothness;
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o_Thickness = n_sampleA.r * _ThicknessRemap;
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}
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