#version 150

in vec4 vertColor;
in vec2 vertTexCoord;

out vec4 fragColor;
uniform vec4 color1;
uniform vec4 color2;
uniform float patternSize;

void main() {
	float colorMix = ((step(patternSize / 2, mod(vertTexCoord.x, patternSize)) * 2 - 1) * (step(patternSize / 2, mod(vertTexCoord.y, patternSize)) * 2 - 1) + 1) / 2;
	fragColor = vertColor * (color1 * (1.0 - colorMix) + color2 * colorMix);
}