/*
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.
*/


attribute vec4 gtf_Color;
attribute vec4 gtf_Vertex;
uniform mat4 gtf_ModelViewProjectionMatrix;
varying vec4 color;

void main (void)
{
	mat3 m1 = mat3(gtf_Color.rgb, gtf_Color.rgb, gtf_Color.rgb);
	mat3 m2 = mat3(1.0, 0.5, 0.5, 0.5, 1.0, 0.5, 0.5, 0.5, 1.0);
	mat3 m3 = mat3(0.0);
	vec3 result = vec3(0.0, 0.0, 0.0);

	m3[0][0] = m1[0][0] * m2[0][0];
	m3[0][1] = m1[0][1] * m2[0][1];
	m3[0][2] = m1[0][2] * m2[0][2];

	m3[1][0] = m1[1][0] * m2[1][0];
	m3[1][1] = m1[1][1] * m2[1][1];
	m3[1][2] = m1[1][2] * m2[1][2];

	m3[2][0] = m1[2][0] * m2[2][0];
	m3[2][1] = m1[2][1] * m2[2][1];
	m3[2][2] = m1[2][2] * m2[2][2];

	result[0] += m3[0][0];
	result[0] += m3[0][1];
	result[0] += m3[0][2];

	result[1] += m3[1][0];
	result[1] += m3[1][1];
	result[1] += m3[1][2];

	result[2] += m3[2][0];
	result[2] += m3[2][1];
	result[2] += m3[2][2];

	color = vec4(result / 2.0, 1.0);
	gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex;
}