mirror of
https://github.com/OpenSpace/OpenSpace.git
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68 lines
3.3 KiB
GLSL
68 lines
3.3 KiB
GLSL
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2020 *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
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* software and associated documentation files (the "Software"), to deal in the Software *
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* without restriction, including without limitation the rights to use, copy, modify, *
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* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
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* permit persons to whom the Software is furnished to do so, subject to the following *
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* conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in all copies *
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* or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, *
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
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* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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****************************************************************************************/
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#version __CONTEXT__
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//layout(location = 1) out vec4 renderTableColor;
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out vec4 renderTableColor;
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uniform int psfMethod;
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uniform float p0Param;
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uniform float p1Param;
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uniform float p2Param;
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uniform float alphaConst;
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uniform float FWHM;
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uniform float betaConstant;
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in vec2 psfCoords;
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void main(void) {
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vec4 fullColor = vec4(0.0, 0.0, 0.0, 1.0);
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if (psfMethod == 0) {
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// PSF Functions from paper: Physically-Based Galre Effects for Digital
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// Images - Spencer, Shirley, Zimmerman and Greenberg.
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float theta = sqrt((psfCoords.y*psfCoords.y + psfCoords.x*psfCoords.x)) * 90.0;
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float f0 = 2.61E6 * exp(-pow(theta/alphaConst, 2.0));
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float f1 = 20.91/pow(theta + alphaConst, 3.0);
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float f2 = 72.37/pow(theta + alphaConst, 2.0);
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float psf_p = p0Param * f0 + p1Param * f1 + p2Param * f2;
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fullColor = vec4(psf_p);
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} else if (psfMethod == 1) {
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// Moffat
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float r = sqrt((psfCoords.y*psfCoords.y + psfCoords.x*psfCoords.x)) * 90.0;
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float alpha = FWHM / (2.f * sqrt(pow(2.f, 1.f/betaConstant) - 1));
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float moffat_psf = pow(1.f + (r/alpha)*(r/alpha), -betaConstant);
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fullColor = vec4(moffat_psf);
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}
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if (fullColor.a == 0) {
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discard;
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}
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renderTableColor = fullColor;
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}
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