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31 lines
547 B
31 lines
547 B
Shader "Hidden/VertexTangentNode"
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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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#pragma vertex vert_img
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#pragma fragment frag
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#include "UnityCG.cginc"
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float4 frag( v2f_img i ) : SV_Target
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{
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float2 tp = 2 * i.uv - 1;
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float tr = sqrt( dot(tp,tp) );
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tr = saturate( tr );
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//if ( tr < 1 ) {
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float2 tuvs;
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float f = ( 1 - sqrt( 1 - tr ) ) / tr;
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float3 tangent = normalize(float3( (1-f)*2, tp.y*0.01, tp.x ));
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return float4((tangent), 1);
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//}
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//else {
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// return 0;
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//}
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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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