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// Data for each pixel
struct PSInput
{
float4 position : SV_POSITION;
float4 color : COLOR;
float2 uv : TEXCOORD;
};
// Creates a gradient between four colors
float4 FourColorGradient(float4 color1, float4 color2, float4 color3, float4 color4, float2 uv)
{
return lerp(lerp(color1, color2, uv.y), lerp(color3, color4, uv.y), uv.x);
}
// Vertex shader
PSInput VSMain(float4 position : POSITION, float4 color : COLOR, float4 uv : TEXCOORD)
{
PSInput result;
result.position = position;
result.color = color;
result.uv = uv.xy;
return result;
}
/*
* Pixel Shader, entry point into this shader
*/
float4 PSMain(PSInput input) : SV_TARGET
{
const float4 _Color1 = float4(1,.5,.5,1);
const float4 _Color2 = float4(0.5,1,0,1);
const float4 _Color3 = float4(0,1,1,1);
const float4 _Color4 = float4(1,0,1,1);
float4 gradient = FourColorGradient(_Color1, _Color2, _Color3, _Color4, input.uv);
return input.color * gradient;
}
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