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// 1px dilate
Shader "Hidden/ftFarSphereDilate"
{
Properties
{
}
SubShader
{
// No culling or depth
Cull Off ZWrite Off ZTest Always
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
struct v2f
{
float4 vertex : SV_POSITION;
float2 uv : TEXCOORD0;
};
v2f vert (uint id : SV_VertexID)
{
v2f o;
float4 pos[6];
pos[0] = float4(-1, -1, 0.5, 1);
pos[1] = float4(-1, 1, 0.5, 1);
pos[2] = float4(1, 1, 0.5, 1);
pos[3] = float4(1, 1, 0.5, 1);
pos[4] = float4(1, -1, 0.5, 1);
pos[5] = float4(-1, -1, 0.5, 1);
o.vertex = pos[id];
o.uv = o.vertex.xy * 0.5f + 0.5f;
o.uv.y = 1.0f - o.uv.y;
return o;
}
sampler2D _MainTex;
float _InvCubeSize;
float4 frag (v2f i) : SV_Target
{
float4 c = tex2Dlod(_MainTex, float4(i.uv,0,0));
if (c.a > 0) return c;
int dilate = 1;
for(int y=-dilate; y<=dilate; y++)
{
for(int x=-dilate; x<=dilate; x++)
{
float4 c2 = tex2Dlod(_MainTex, float4(i.uv + float2(x,y) * _InvCubeSize,0,0));
if (c2.a > 0) c = c2;
}
}
return c;
}
ENDCG
}
}
}
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