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88 lines
2.8 KiB
88 lines
2.8 KiB
/* |
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This file is part of Magnum. |
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Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš <mosra@centrum.cz> |
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Permission is hereby granted, free of charge, to any person obtaining a |
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copy of this software and associated documentation files (the "Software"), |
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to deal in the Software without restriction, including without limitation |
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the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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and/or sell copies of the Software, and to permit persons to whom the |
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Software is furnished to do so, subject to the following conditions: |
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The above copyright notice and this permission notice shall be included |
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in all copies or substantial portions of the Software. |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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DEALINGS IN THE SOFTWARE. |
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*/ |
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#ifndef NEW_GLSL |
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#define in varying |
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#define fragmentColor gl_FragColor |
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#endif |
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#ifndef RUNTIME_CONST |
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#define const |
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#endif |
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#ifndef EXPLICIT_UNIFORM_LOCATION |
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#define layout(arg) |
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#endif |
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#ifndef GL_ES |
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layout(location = 2) uniform vec4 color = vec4(1.0, 1.0, 1.0, 1.0); |
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#else |
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uniform lowp vec4 color; |
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#endif |
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#ifdef WIREFRAME_RENDERING |
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#ifndef GL_ES |
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layout(location = 3) uniform vec4 wireframeColor = vec4(0.0, 0.0, 0.0, 1.0); |
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layout(location = 4) uniform float wireframeWidth = 1.0; |
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layout(location = 5) uniform float smoothness = 2.0; |
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#else |
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uniform lowp vec4 wireframeColor; |
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uniform lowp float wireframeWidth; |
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uniform lowp float smoothness; |
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#endif |
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#ifndef NO_GEOMETRY_SHADER |
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noperspective in lowp vec3 dist; |
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#else |
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in lowp vec3 barycentric; |
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#endif |
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#endif |
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#ifdef NEW_GLSL |
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out vec4 fragmentColor; |
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#endif |
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#if defined(WIREFRAME_RENDERING) && defined(GL_ES) && __VERSION__ < 300 |
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#extension GL_OES_standard_derivatives : enable |
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#endif |
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void main() { |
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#ifdef WIREFRAME_RENDERING |
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#ifndef NO_GEOMETRY_SHADER |
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/* Distance to nearest side */ |
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const float nearest = min(min(dist.x, dist.y), dist.z); |
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/* Smooth step between face color and wireframe color based on distance */ |
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fragmentColor = mix(wireframeColor, color, smoothstep(wireframeWidth-smoothness, wireframeWidth+smoothness, nearest)); |
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#else |
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const lowp vec3 d = fwidth(barycentric); |
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const lowp vec3 factor = smoothstep(vec3(0.0), d*1.5, barycentric); |
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const lowp float nearest = min(min(factor.x, factor.y), factor.z); |
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fragmentColor = mix(wireframeColor, color, nearest); |
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#endif |
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#else |
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fragmentColor = color; |
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#endif |
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}
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