58 lines
1.7 KiB
Plaintext
58 lines
1.7 KiB
Plaintext
Shader "AD/uvTutorial"
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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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}
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SubShader
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{
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Tags{
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"RenderPipeline"="UniversalRenderPipeline"
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"RenderType"="Transparent"
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"IgnoreProjector"="True"
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"Queue"="Transparent"
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}
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Pass
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{
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Blend SrcAlpha OneMinusSrcAlpha
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ZWrite off
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Cull off
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HLSLPROGRAM
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#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
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#pragma vertex vert
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#pragma fragment frag
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struct Attributes{
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float4 positionOS : POSITION;
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float2 uv : TEXCOORD0;
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};
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struct Varings{
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float4 positionCS : SV_POSITION;
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float2 uv : TEXCOORD0;
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};
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float _fragSize;
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float _frageCenter;
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Varings vert(Attributes input){
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Varings o;
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o.positionCS = TransformObjectToHClip(input.positionOS);
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o.uv = input.uv;
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return o;
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}
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half4 frag(Varings input) : SV_TARGET{
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float2 uv = input.uv * 10;
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float2 derivative = fwidth(uv);
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uv = frac(uv);
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uv = abs(uv - 0.5);
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uv = uv / derivative; //这里开始进行因子缩放，d越大，uv越小，更有可能有“正alpha值”
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float min_value = min(uv.x, uv.y);
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half alpha = 1.0 - min(min_value, 1.0); //实际的线框是靠近x,y轴的，
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//远离x, y轴的uv值大，min后等于1，取反等于0
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return half4(1.0, 0.0, 0.0, alpha);
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}
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ENDHLSL
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}
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}
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} |