#version 430 core

layout (location = 0) out vec4 color;
layout(origin_upper_left, pixel_center_integer) in vec4 gl_FragCoord;

in vec4 particleColor;

uniform uint pixelWidth;

void main(void)
{
	color = vec4(particleColor.xyz, 1.0f);
	/*
	color.r *= ((mod(gl_FragCoord.x, 8) != 0) && (mod(gl_FragCoord.y, 8) != 0) && (mod(gl_FragCoord.x, 8) != 1) && (mod(gl_FragCoord.y, 8) != 1))? 0 : 1;
	color.g *= ((mod(gl_FragCoord.x, 8) != 2) && (mod(gl_FragCoord.y, 8) != 2) && (mod(gl_FragCoord.x, 8) != 3) && (mod(gl_FragCoord.y, 8) != 3))? 0 : 1;
	color.b *= ((mod(gl_FragCoord.x, 8) != 4) && (mod(gl_FragCoord.y, 8) != 4) && (mod(gl_FragCoord.x, 8) != 5) && (mod(gl_FragCoord.y, 8) != 5))? 0 : 1;
	*/
	float mx = mod(roundEven(gl_FragCoord.x), 4 * pixelWidth);
	float my = mod(roundEven(gl_FragCoord.y), 4 * pixelWidth);

	color.r *= ((mx < pixelWidth) && (my < pixelWidth * 3)) ? 0.8 : 0.3;
	color.g *= ((mx > pixelWidth && mx < pixelWidth * 2) && (my < pixelWidth * 3)) ? 1 : 0.4;
	color.b *= ((mx > pixelWidth * 2 && mx < pixelWidth * 3) && (my < pixelWidth * 3)) ? 1 : 0.4;
}