/// Amplitude of Grating
/// 0
/// 1
/// 1
float contrast : register(C1);
/// Phase of Grating
/// 0
/// 100
/// 100
float frequency: register(C2);
/// Phase of Grating
/// 0
/// 6.283184
/// 0
float phase: register(C3);
/// Orientation of Grating
/// 0
/// 6.283184
/// 0
float orientation: register(C4);
/// Width of envelope
/// 1
/// 1024
/// 32
float SizeH : register(C5);
/// Height of envelope
/// 1
/// 1024
/// 32
float SizeV : register(C6);
float rp(float2 uv)
{
const float2 Center = float2(0.5,0.5);
float2 dir = uv - Center; // vector from center to pixel
float dist = length(dir);
//dir /= dist;
return dist;
}
float4 main(float2 uv : TEXCOORD) : COLOR
{
float _x = sin(orientation)*uv[0]-cos(orientation)*uv[1];
float l = 0.5
+ contrast*0.5*cos(frequency*_x + phase);
float4 color = float4(l,l,l,1.0);
return color;
}