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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;
vec2 floor_ref(vec2 x)
{
if(x[0] >= 0.0)
x[0] = float(int(x[0]));
else
x[0] = float(int(x[0]) - 1);
if(x[1] >= 0.0)
x[1] = float(int(x[1]));
else
x[1] = float(int(x[1]) - 1);
return x;
}
void main (void)
{
vec2 c = 10.0 * 2.0 * (color.rg - 0.5);
gl_FragColor = vec4((floor_ref(c) + 10.0) / 20.0, 0.0, 1.0);
}
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