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#include "utilities.effect"
uniform float4x4 ViewProj;
uniform texture2d image;
uniform float2 uv_size;
VertData mainTransform(VertData v_in)
{
v_in.pos = mul(float4(v_in.pos.xyz, 1.0), ViewProj);
return v_in;
}
float4 mainImage(VertData v_in) : TARGET
{
//float2 coord = max(v_in.uv * uv_size, float2(1.0, 1.0));
float2 coord = v_in.uv * uv_size;
float2 dx = coord + float2(1.0, 0.0);
float2 dxn = coord - float2(1.0, 0.0);
float2 dy = coord + float2(0.0, 1.0);
float2 dyn = coord - float2(0.0, 1.0);
float4 disp_x = image.Sample(textureSampler, dx / uv_size);
float4 disp_xn = image.Sample(textureSampler, dxn / uv_size);
float4 disp_y = image.Sample(textureSampler, dy / uv_size);
float4 disp_yn = image.Sample(textureSampler, dyn / uv_size);
float ddx = disp_x.r - disp_xn.r;
float ddy = disp_y.r - disp_yn.r;
return float4(20.0 * ddx, 20.0 * ddy, 0.0, 1.0);
}
technique Draw
{
pass
{
vertex_shader = mainTransform(v_in);
pixel_shader = mainImage(v_in);
}
}
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