From 580716bef69be76807662633323bf6599803795e Mon Sep 17 00:00:00 2001 From: Robin Date: Mon, 13 Sep 2021 22:51:55 -0700 Subject: [PATCH] Correct case for file. Signed-off-by: Robin Signed-off-by: rbarrand --- .../Features/PostProcessing/KelvinToRGB.azsli | 75 ------------------- 1 file changed, 75 deletions(-) delete mode 100644 Gems/Atom/Feature/Common/Assets/ShaderLib/3rdParty/Features/PostProcessing/KelvinToRGB.azsli diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/3rdParty/Features/PostProcessing/KelvinToRGB.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/3rdParty/Features/PostProcessing/KelvinToRGB.azsli deleted file mode 100644 index aa57f0f4a1..0000000000 --- a/Gems/Atom/Feature/Common/Assets/ShaderLib/3rdParty/Features/PostProcessing/KelvinToRGB.azsli +++ /dev/null @@ -1,75 +0,0 @@ -/* - * Copyright (c) Contributors to the Open 3D Engine Project. - * For complete copyright and license terms please see the LICENSE at the root of this distribution. - * - * SPDX-License-Identifier: (Apache-2.0 OR MIT) AND Creative Commons 3.0 - * - */ - -// Ref: https://www.shadertoy.com/view/lsSXW1 -// ported by Renaud Bédard (@renaudbedard) from original code from Tanner Helland -// http://www.tannerhelland.com/4435/convert-temperature-rgb-algorithm-code/ - -// color space functions translated from HLSL versions on Chilli Ant (by Ian Taylor) -// http://www.chilliant.com/rgb2hsv.html - -// licensed and released under Creative Commons 3.0 Attribution -// https://creativecommons.org/licenses/by/3.0/ - -float3 HueToRgb(float hue) -{ - return saturate(float3(abs(hue * 6.0f - 3.0f) - 1.0f, - 2.0f - abs(hue * 6.0f - 2.0f), - 2.0f - abs(hue * 6.0f - 4.0f))); -} - -float3 RgbToHcv(float3 rgb) -{ - // Based on work by Sam Hocevar and Emil Persson - const float4 p = (rgb.g < rgb.b) ? float4(rgb.bg, -1.0f, 2.0f/3.0f) : float4(rgb.gb, 0.0f, -1.0f/3.0f); - const float4 q1 = (rgb.r < p.x) ? float4(p.xyw, rgb.r) : float4(rgb.r, p.yzx); - const float c = q1.x - min(q1.w, q1.y); - const float h = abs((q1.w - q1.y) / (6.0f * c + 0.000001f ) + q1.z); - return float3(h, c, q1.x); -} - -float3 RgbToHsl(float3 rgb) -{ - rgb.xyz = max(rgb.xyz, 0.000001f); - const float3 hcv = RgbToHcv(rgb); - const float L = hcv.z - hcv.y * 0.5f; - const float S = hcv.y / (1.0f - abs(L * 2.0f - 1.0f) + 0.000001f); - return float3(hcv.x, S, L); -} - -float3 HslToRgb(float3 hsl) -{ - const float3 rgb = HueToRgb(hsl.x); - const float c = (1.0f - abs(2.0f * hsl.z - 1.0f)) * hsl.y; - return (rgb - 0.5f) * c + hsl.z; -} - -// Color temperature -float3 KelvinToRgb(float kelvin) -{ - float3 ret; - kelvin = clamp(kelvin, 1000.0f, 40000.0f) / 100.0f; - if(kelvin <= 66.0f) - { - ret.r = 1.0f; - ret.g = saturate(0.39008157876901960784f * log(kelvin) - 0.63184144378862745098f); - } - else - { - float t = max(kelvin - 60.0f, 0.0f); - ret.r = saturate(1.29293618606274509804f * pow(t, -0.1332047592f)); - ret.g = saturate(1.12989086089529411765f * pow(t, -0.0755148492f)); - } - if(kelvin >= 66.0f) - ret.b = 1.0f; - else if(kelvin < 19.0f) - ret.b = 0.0f; - else - ret.b = saturate(0.54320678911019607843f * log(kelvin - 10.0f) - 1.19625408914f); - return ret; -}