mirror of https://github.com/axmolengine/axmol.git
58 lines
1.9 KiB
GLSL
58 lines
1.9 KiB
GLSL
|
/****************************************************************************
|
||
|
|
Copyright (c) 2017 Chukong Technologies Inc.
|
||
|
|
|
||
|
|
http://www.cocos2d-x.org
|
||
|
|
|
||
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||
|
|
of this software and associated documentation files (the "Software"), to deal
|
||
|
|
in the Software without restriction, including without limitation the rights
|
||
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||
|
|
copies of the Software, and to permit persons to whom the Software is
|
||
|
|
furnished to do so, subject to the following conditions:
|
||
|
|
|
||
|
|
The above copyright notice and this permission notice shall be included in
|
||
|
|
all copies or substantial portions of the Software.
|
||
|
|
|
||
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||
|
|
THE SOFTWARE.
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
const char* ccShader_LayerRadialGradient_frag = R"(
|
||
|
|
|
||
|
|
uniform vec4 u_startColor;
|
||
|
|
uniform vec4 u_endColor;
|
||
|
|
uniform vec2 u_center;
|
||
|
|
uniform float u_radius;
|
||
|
|
uniform float u_expand;
|
||
|
|
|
||
|
|
#ifdef GL_ES
|
||
|
|
varying lowp vec4 v_position;
|
||
|
|
#else
|
||
|
|
varying vec4 v_position;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
void main()
|
||
|
|
{
|
||
|
|
float d = distance(v_position.xy, u_center) / u_radius;
|
||
|
|
if (d <= 1.0)
|
||
|
|
{
|
||
|
|
if (d <= u_expand)
|
||
|
|
{
|
||
|
|
gl_FragColor = u_startColor;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
gl_FragColor = mix(u_startColor, u_endColor, (d - u_expand) / (1.0 - u_expand));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
gl_FragColor = vec4(0.0, 0.0, 0.0, 0.0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
)";
|