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Fixed Curvature zoom

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- fixed curvature zoom to fit the screen size in any aspect ratio
This commit is contained in:
ImJezze 2015-05-10 15:05:19 +02:00
parent 871900fe1e
commit 3f3647eeef
1 changed files with 14 additions and 8 deletions
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22
hlsl/post.fx
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@ -145,7 +145,7 @@ float nextPowerOfTwo(float n)
return pow(2, floor(log2(n) / log2(2)) + 1);
}
// stackoverflow.com/questions/5149544/can-i-generate-a-random-number-inside-a-pixel-shader/
// www.stackoverflow.com/questions/5149544/can-i-generate-a-random-number-inside-a-pixel-shader/
float random(float2 seed)
{
// irrationals for pseudo randomness
@ -154,7 +154,7 @@ float random(float2 seed)
return frac(cos(dot(seed, i)) * 123456.0f);
}
// dinodini.wordpress.com/2010/04/05/normalized-tunable-sigmoid-functions/
// www.dinodini.wordpress.com/2010/04/05/normalized-tunable-sigmoid-functions/
float normalizedSigmoid(float n, float k)
{
// valid for n and k in range of -1.0 and 1.0
@ -251,14 +251,20 @@ float4 ps_main(PS_INPUT Input) : COLOR
float2 HalfRect = SourceRect * 0.5f;
// Screen Curvature
float2 CurvatureUnitCoord = Input.TexCoord * (UsedArea * 2.0f) - 1.0f;
float2 CurvatureUnitCoord =
Input.TexCoord
* UsedArea * 2.0f -
1.0f;
float2 CurvatureCurve =
CurvatureUnitCoord
* CurvatureAmount * 0.25f
* pow(length(CurvatureUnitCoord), 2.0f)
/ pow(length(UsedArea), 2.0f);
// todo: zoom is only full screen fitting for 10:7 source ratio
float2 CurvatureZoom = 1.0f - (CurvatureAmount * 0.25f) * (UsedArea * 0.5f);
* pow(length(CurvatureUnitCoord), 2.0f)
/ pow(length(UsedArea), 2.0f)
* CurvatureAmount * 0.25f; // reduced curvature
float2 CurvatureZoom =
1.0f -
UsedArea * 2.0f
/ pow(length(UsedArea), 2.0f)
* CurvatureAmount * 0.25f; // reduced curvature
float2 ScreenCoord = Input.ScreenCoord / ScreenDims;
ScreenCoord -= HalfRect;