75 lines
1.8 KiB
Text
75 lines
1.8 KiB
Text
Shader "CrispyPin/gol"
|
|
{
|
|
Properties
|
|
{
|
|
_LastFrame ("Texture", 2D) = "white" {}
|
|
}
|
|
SubShader
|
|
{
|
|
Tags { "RenderType"="Opaque" }
|
|
LOD 100
|
|
|
|
Pass
|
|
{
|
|
CGPROGRAM
|
|
#pragma vertex vert
|
|
#pragma fragment frag
|
|
|
|
#include "UnityCG.cginc"
|
|
|
|
struct appdata
|
|
{
|
|
float4 vertex : POSITION;
|
|
float2 uv : TEXCOORD0;
|
|
};
|
|
|
|
struct v2f
|
|
{
|
|
float2 uv : TEXCOORD0;
|
|
float4 vertex : SV_POSITION;
|
|
};
|
|
|
|
sampler2D _LastFrame;
|
|
|
|
v2f vert (appdata v)
|
|
{
|
|
v2f o;
|
|
o.vertex = UnityObjectToClipPos(v.vertex);
|
|
o.uv = v.uv;
|
|
return o;
|
|
}
|
|
|
|
int state(half2 uv, half x, half y){
|
|
return tex2D(_LastFrame, uv + half2(x, y)).r > 0;
|
|
}
|
|
|
|
fixed4 frag (v2f i) : SV_Target
|
|
{
|
|
const half d = 1.0/256.0;
|
|
|
|
int count = state(i.uv, -d, -d)+
|
|
state(i.uv, 0, -d)+
|
|
state(i.uv, d, -d)+
|
|
state(i.uv, -d, 0)+
|
|
state(i.uv, d, 0)+
|
|
state(i.uv, -d, d)+
|
|
state(i.uv, 0, d)+
|
|
state(i.uv, d, d);
|
|
half this = tex2D(_LastFrame, i.uv).r;
|
|
half state;
|
|
|
|
if (this.r > 0){
|
|
state = count > 1 && count < 4;
|
|
// col = count > 0 && count < 6; // mazetric
|
|
}
|
|
else {
|
|
state = count == 3;
|
|
}
|
|
|
|
float4 col = float4(i.uv * state, 0.5 * state, 1);
|
|
return col;
|
|
}
|
|
ENDCG
|
|
}
|
|
}
|
|
}
|