mirror of
https://github.com/OpenSpace/OpenSpace.git
synced 2026-05-24 13:28:55 -05:00
Emil Axelsson
d64a0df5f6
Web GUI from Klas Eskilson (three new modules: webgui, webbrowser and cefwebgui) Parallel connection refactorization Wormhole server added to the main repository Transfer function editor work from Cristoffer Särevall Update ghoul
95 lines
4.2 KiB
GLSL
95 lines
4.2 KiB
GLSL
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2018 *
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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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uniform float maxStepSize#{id} = 0.02;
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uniform sampler3D volumeTexture_#{id};
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uniform sampler1D transferFunction_#{id};
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uniform int gridType_#{id} = 0;
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uniform int nClips_#{id};
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uniform vec3 clipNormals_#{id}[8];
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uniform vec2 clipOffsets_#{id}[8];
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uniform float opacity_#{id} = 10.0;
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// Normalization factor x for radius r [0, 1].
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// value *= 1/(r^x)
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// only working for volumes given in spherical coordianates.
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// Applied after any linear value remapping.
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uniform float rNormalization_#{id} = 0.0;
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uniform float rUpperBound_#{id} = 1.0;
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void sample#{id}(vec3 samplePos, vec3 dir, inout vec3 accumulatedColor,
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inout vec3 accumulatedAlpha, inout float stepSize)
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{
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vec3 transformedPos = samplePos;
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if (gridType_#{id} == 1) {
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transformedPos = volume_cartesianToSpherical(samplePos);
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}
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float clipAlpha = 1.0;
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vec3 centerToPos = transformedPos - vec3(0.5);
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for (int i = 0; i < nClips_#{id} && i < 8; i++) {
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vec3 clipNormal = clipNormals_#{id}[i];
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float clipBegin = clipOffsets_#{id}[i].x;
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float clipEnd = clipBegin + clipOffsets_#{id}[i].y;
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clipAlpha *= smoothstep(clipBegin, clipEnd, dot(centerToPos, clipNormal));
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}
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clipAlpha *= 1.0 - smoothstep(rUpperBound_#{id} - 0.01, rUpperBound_#{id} + 0.01, transformedPos.x);
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if (clipAlpha > 0) {
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float val = texture(volumeTexture_#{id}, transformedPos).r;
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if (rNormalization_#{id} > 0 && gridType_#{id} == 1) {
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val *= pow(transformedPos.x, rNormalization_#{id});
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}
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vec4 color = texture(transferFunction_#{id}, val);
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vec3 backColor = color.rgb;
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vec3 backAlpha = color.aaa;
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backColor *= stepSize*opacity_#{id} * clipAlpha;
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backAlpha *= stepSize*opacity_#{id} * clipAlpha;
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backColor = clamp(backColor, 0.0, 1.0);
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backAlpha = clamp(backAlpha, 0.0, 1.0);
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vec3 oneMinusFrontAlpha = vec3(1.0) - accumulatedAlpha;
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accumulatedColor += oneMinusFrontAlpha * backColor;
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accumulatedAlpha += oneMinusFrontAlpha * backAlpha;
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}
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stepSize = maxStepSize#{id};
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}
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float stepSize#{id}(vec3 samplePos, vec3 dir) {
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return maxStepSize#{id};
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}
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