Correct case for file.

Signed-off-by: Robin <rbarrand@amazon.com> Signed-off-by: rbarrand <rbarrand@amazon.com>
2021-09-13 22:51:55 -07:00
parent 22dd71739f
commit 580716bef6
1 changed files with 0 additions and 75 deletions
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-/*
- * 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;
-}