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/* <copyright>
Copyright (c) 2012, Motorola Mobility, Inc
All Rights Reserved.
BSD License.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name of Motorola Mobility nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
</copyright> */
#ifdef GL_ES
precision highp float;
#endif
uniform vec4 u_color1;
uniform vec4 u_color2;
uniform vec4 u_color3;
uniform vec4 u_color4;
uniform float u_colorStop1;
uniform float u_colorStop2;
uniform float u_colorStop3;
uniform float u_colorStop4;
uniform vec2 u_cos_sin_angle;
//uniform int u_colorCount; // currently using all 4
varying vec2 v_uv;
void main(void)
{
vec2 pt = vec2( v_uv.x - 0.5, v_uv.y - 0.5);
float t = sqrt( dot(pt, pt) );
vec4 color;
if (t < u_colorStop1)
color = u_color1;
else if (t < u_colorStop2)
{
float tLocal = (t - u_colorStop1)/(u_colorStop2 - u_colorStop1);
color = mix(u_color1,u_color2,tLocal);
}
else if (t < u_colorStop3)
{
float tLocal = (t - u_colorStop2)/(u_colorStop3 - u_colorStop2);
color = mix(u_color2,u_color3,tLocal);
}
else if (t < u_colorStop4)
{
float tLocal = (t - u_colorStop3)/(u_colorStop4 - u_colorStop3);
color = mix(u_color3,u_color4,tLocal);
}
else
color = u_color4;
gl_FragColor = color;
}
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