conwaylife.cg

struct output{
	float4 color : COLOR;
};

output main(float2 position : POSITION, float2 texCoord : TEXCOORD, uniform float sze, uniform sampler2D lastTex, uniform float var1)
{
	output OUT;
	float d = 1.0 / sze;
	float4 lastCol = tex2D(lastTex, texCoord);
	int upCount =   floor(tex2D(lastTex, float2(texCoord.x - d, texCoord.y - d)).b) +
				 floor( tex2D(lastTex, float2(texCoord.x, texCoord.y - d)).b) +
				  floor(tex2D(lastTex, float2(texCoord.x + d, texCoord.y - d)).b) +
				  floor(tex2D(lastTex, float2(texCoord.x - d, texCoord.y)).b) +
				  floor(tex2D(lastTex, float2(texCoord.x + d, texCoord.y)).b) +
				  floor(tex2D(lastTex, float2(texCoord.x - d, texCoord.y + d)).b) +
				  floor(tex2D(lastTex, float2(texCoord.x, texCoord.y + d)).b) +
				  floor(tex2D(lastTex, float2(texCoord.x + d, texCoord.y + d)).b);
	if((upCount == 2 && lastCol.b == 1.0) || upCount == 3){
		OUT.color = float4(texCoord.x, texCoord.y, 1, 1);
//		OUT.color = floatr4(1, 1, 1, 1);
	}
	else{
		OUT.color = float4(0, 0, 0, 1);
	}
	return OUT;
}