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/*
Copyright (c) 2019 The Khronos Group Inc.
Use of this source code is governed by an MIT-style license that can be
found in the LICENSE.txt file.
*/
#ifdef GL_ES
precision mediump float;
#endif
varying vec4 color;
void main (void)
{
const float M_PI = 3.14159265358979323846;
// Both are unit vectors
float v1 = (color.g * 2.0) - 1.0;
float v2 = (color.b * 2.0) - 1.0;
if(dot(v1, v2) >= 0.0) v1 *= -1.0;
gl_FragColor = vec4((v1 + 1.0) / 2.0, 0.0, 0.0, 1.0);
}
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