1
2/*
3Copyright (c) 2019 The Khronos Group Inc.
4Use of this source code is governed by an MIT-style license that can be
5found in the LICENSE.txt file.
6*/
7
8
9attribute vec4 gtf_Vertex;
10attribute vec4 gtf_Color;
11uniform mat4 gtf_ModelViewProjectionMatrix;
12varying vec4 color;
13
14void main (void)
15{
16	const float M_PI = 3.14159265358979323846;
17	vec2 c = 4.0 * 2.0 * (gtf_Color.rg - 0.5);
18	color = vec4(atan(c) / M_PI + 0.5, 0.0, 1.0);
19	gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex;
20}
21