98 lines
3.7 KiB
Plaintext
98 lines
3.7 KiB
Plaintext
Shader "URP_Test/PostOutline_2"
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{
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Properties
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{
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_MainTex ("Texture", 2D) = "white" {}
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_SampleDistance ("SampleDistance", Float) = 0.01
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}
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SubShader
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{
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Tags
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{
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"RenderType"="Opaque"
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"RenderPipeline" = "UniversalPipeline"
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}
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Cull Off
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ZWrite Off
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ZTest Off
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Pass
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{
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Name "DrawEdge"
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// 轮廓
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HLSLPROGRAM
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#pragma vertex VERT
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#pragma fragment FRAG
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#pragma target 2.0
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#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
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CBUFFER_START(UnityPerMaterial)
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float4 _MainTex_TexelSize;
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float _SampleDistance;
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CBUFFER_END
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TEXTURE2D(_MainTex);
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SAMPLER(sampler_MainTex);
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struct a2v
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{
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float4 positionOS : POSITION;
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float2 uv0 : TEXCOORD;
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};
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struct v2f
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{
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float4 positionCS : SV_POSITION;
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float4 texcoord0 : TEXCOORD0;
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};
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v2f VERT(a2v i)
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{
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v2f o;
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o.positionCS = TransformObjectToHClip(i.positionOS.xyz);
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o.texcoord0 = float4(i.uv0, _SampleDistance * _MainTex_TexelSize.x, _SampleDistance * _MainTex_TexelSize.y);
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return o;
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}
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half4 FRAG(v2f i):SV_TARGET
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{
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half4 centerCol = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, i.texcoord0.xy);
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half offsetX = i.texcoord0.z;
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half offsetY = i.texcoord0.w;
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half4 leftCol = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, i.texcoord0.xy + float2(-offsetX, 0));
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half4 rightCol = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, i.texcoord0.xy + float2(offsetX, 0));
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half4 upCol = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, i.texcoord0.xy + float2(0, offsetY));
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half4 downCol = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, i.texcoord0.xy + float2(0, -offsetY));
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// // 左下角
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// half4 leftDownCol = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, i.texcoord0.xy + float2(-offsetX, -offsetY));
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// // 右下角
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// half4 rightDownCol = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, i.texcoord0.xy + float2(offsetX, -offsetY));
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// // 左上角
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// half4 leftUpCol = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, i.texcoord0.xy + float2(-offsetX, offsetY));
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// // 右上角
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// half4 rightUpCol = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, i.texcoord0.xy + float2(offsetX, offsetY));
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// 检测是否是边缘，保持 left -> right -> up -> down 的优先级
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half centerMask = 1.0h - step(0.5h, centerCol.a);
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half leftMask = centerMask * (1.0h - step(leftCol.a, 0.5h));
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half rightMask = centerMask * (1.0h - leftMask) * (1.0h - step(rightCol.a, 0.5h));
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half upMask = centerMask * (1.0h - leftMask) * (1.0h - rightMask) * (1.0h - step(upCol.a, 0.5h));
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half downMask = centerMask * (1.0h - leftMask) * (1.0h - rightMask) * (1.0h - upMask) * (1.0h - step(downCol.a, 0.5h));
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half3 edgeColor = leftCol.xyz * leftMask
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+ rightCol.xyz * rightMask
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+ upCol.xyz * upMask
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+ downCol.xyz * downMask;
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half edgeAlpha = saturate(leftMask + rightMask + upMask + downMask);
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return half4(edgeColor, edgeAlpha);
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}
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ENDHLSL
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}
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}
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}
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