80 lines
1.9 KiB
Text
80 lines
1.9 KiB
Text
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Shader "CrispyPin/gol"
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{
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Properties
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{
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_LastFrame ("Texture", 2D) = "white" {}
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}
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SubShader
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{
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Tags { "RenderType"="Opaque" }
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LOD 100
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Pass
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{
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#include "UnityCG.cginc"
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struct appdata
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{
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float4 vertex : POSITION;
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float2 uv : TEXCOORD0;
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};
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struct v2f
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{
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float2 uv : TEXCOORD0;
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float4 vertex : SV_POSITION;
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};
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sampler2D _LastFrame;
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v2f vert (appdata v)
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{
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v2f o;
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o.vertex = UnityObjectToClipPos(v.vertex);
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o.uv = v.uv;
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return o;
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}
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int state(float2 uv, float x,float y){
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return tex2D(_LastFrame, uv + float2(x, y)).r > 0;
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}
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fixed4 frag (v2f i) : SV_Target
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{
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const float d = 1.0/256.0;
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int count = state(i.uv, -d, -d)+
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state(i.uv, 0, -d)+
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state(i.uv, d, -d)+
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state(i.uv, -d, 0)+
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state(i.uv, d, 0)+
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state(i.uv, -d, d)+
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state(i.uv, 0, d)+
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state(i.uv, d, d);
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float4 this =tex2D(_LastFrame, i.uv);
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float state;
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if (this.r > 0){
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state = count > 1 && count < 4;
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// col = count > 0 && count < 6; // mazetric
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}
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else {
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state = count == 3;
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}
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float4 col = float4(i.uv, 0.5, 1);
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col *= state;
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col.a = 1;
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return col;
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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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