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PostProcessing: fix lens distortion shader for HLSL

This commit is contained in:
Tillmann Karras 2021-07-18 22:48:13 +01:00
parent 6e7698a354
commit 2344624b08
1 changed files with 5 additions and 5 deletions
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10
Data/Sys/Shaders/lens_distortion.glsl
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@ -63,7 +63,7 @@ void main()
}
// convert coordinates to NDC space
float2 fragPos = (GetCoordinates() - 0.5f - vec2(offsetAdd, 0.0f)) * 2.0f;
float2 fragPos = (GetCoordinates() - 0.5f - float2(offsetAdd, 0.0f)) * 2.0f;
// Calculate the source location "radius" (distance from the centre of the viewport)
float destR = length(fragPos);
@ -72,16 +72,16 @@ void main()
float srcR = destR * sizeAdjust + ( ka * pow(destR, 2.0) + kb * pow(destR, 4.0));
// Calculate the source vector (radial)
vec2 correctedRadial = normalize(fragPos) * srcR;
float2 correctedRadial = normalize(fragPos) * srcR;
// fix aspect ratio
vec2 widenedRadial = correctedRadial * vec2(aspectAdjustment, 1.0f);
float2 widenedRadial = correctedRadial * float2(aspectAdjustment, 1.0f);
// Transform the coordinates (from [-1,1]^2 to [0, 1]^2)
vec2 uv = (widenedRadial/2.0f) + vec2(0.5f) + vec2(offsetAdd, 0.0f);
float2 uv = (widenedRadial/2.0f) + float2(0.5f, 0.5f) + float2(offsetAdd, 0.0f);
// Sample the texture at the source location
if(clamp(uv, 0.0, 1.0) != uv)
if(any(clamp(uv, 0.0, 1.0) != uv))
{
// black if beyond bounds
SetOutput(float4(0.0, 0.0, 0.0, 0.0));