mirror of https://github.com/axmolengine/axmol.git
63 lines
1.9 KiB
GLSL
63 lines
1.9 KiB
GLSL
/****************************************************************************
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Copyright (c) 2016 Chukong Technologies Inc.
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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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 THE
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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 FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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const char* layer_radialGradient_frag = R"(
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#ifdef GL_ES
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precision highp float;
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#endif
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uniform vec4 u_startColor;
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uniform vec4 u_endColor;
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uniform vec2 u_center;
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uniform float u_radius;
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uniform float u_expand;
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#ifdef GL_ES
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varying lowp vec4 v_position;
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#else
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varying vec4 v_position;
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#endif
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void main()
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{
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float d = distance(v_position.xy, u_center) / u_radius;
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if (d <= 1.0)
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{
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if (d <= u_expand)
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{
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gl_FragColor = u_startColor;
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}
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else
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{
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gl_FragColor = mix(u_startColor, u_endColor, (d - u_expand) / (1.0 - u_expand));
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}
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}
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else
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{
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gl_FragColor = vec4(0.0, 0.0, 0.0, 0.0);
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}
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}
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)";
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