34 lines
559 B
Plaintext
34 lines
559 B
Plaintext
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Shader "Hidden/IsNaN"
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{
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Properties
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{
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_A ("_A", 2D) = "white" {}
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}
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SubShader
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{
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Pass
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{
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CGPROGRAM
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#include "UnityCG.cginc"
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#include "Preview.cginc"
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#pragma vertex vert_img
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#pragma fragment frag
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sampler2D _A;
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bool4 IsNaN( float4 x )
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{
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const float zero = float4( 0.0f, 0.0f, 0.0f, 0.0f );
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return !( x < zero || x > zero || x == zero );
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}
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float4 frag(v2f_img i) : SV_Target
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{
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// for some reason, isnan() wasn't working in preview shaders
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return IsNaN( tex2D(_A, i.uv) ) ? 1 : 0;
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}
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ENDCG
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}
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}
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}
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