36 lines
1.4 KiB
HLSL
36 lines
1.4 KiB
HLSL
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#ifndef MATCAP
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#define MATCAP
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UNITY_DECLARE_TEX2D_NOSAMPLER(_Matcap);
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UNITY_DECLARE_TEX2D_NOSAMPLER(_MatcapMap); float4 _MatcapMap_ST;
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float4 _MatcapColor;
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float _MatcapStrength;
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float _ReplaceWithMatcap;
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float _MultiplyMatcap;
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float _AddMatcap;
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float3 matcap;
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float matcapMask;
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float2 getMatcapUV(float3 viewDirection, float3 normalDirection)
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{
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half3 worldViewUp = normalize(half3(0, 1, 0) - viewDirection * dot(viewDirection, half3(0, 1, 0)));
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half3 worldViewRight = normalize(cross(viewDirection, worldViewUp));
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half2 matcapUV = half2(dot(worldViewRight, normalDirection), dot(worldViewUp, normalDirection)) * 0.5 + 0.5;
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return matcapUV;
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}
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void calculateMatcap(float3 cameraToVert, float3 normal, float2 uv)
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{
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float2 matcapUV = getMatcapUV(cameraToVert, normal);
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matcap = UNITY_SAMPLE_TEX2D_SAMPLER(_Matcap, _MainTex, matcapUV) * _MatcapColor * _MatcapStrength;
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matcapMask = UNITY_SAMPLE_TEX2D_SAMPLER(_MatcapMap, _MainTex, TRANSFORM_TEX(uv, _MatcapMap));
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}
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void applyMatcap(inout float4 finalColor)
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{
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finalColor.rgb = lerp(finalColor, matcap, _ReplaceWithMatcap * matcapMask);
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finalColor.rgb *= lerp(1, matcap, _MultiplyMatcap * matcapMask);
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finalColor.rgb += matcap * _AddMatcap * matcapMask;
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}
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#endif
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