#version 100

precision mediump int;
precision mediump float;

varying vec2 texCoord;

attribute vec4 vertex;

void main()                    
{
	vec2 inPos = sign(vertex.xy);
	gl_Position = vec4(inPos.xy, 0.0, 1.0);

	vec2 uv = (vec2(inPos.x, -inPos.y) + 1.0)*0.5;
	texCoord = uv;
	/*
	const float size = 0.01;
	texCoord[1] = uv + vec2(0.0, 1.0)*size;
	texCoord[2] = uv + vec2(0.0, 2.0)*size;
	texCoord[3] = uv + vec2(0.0, -1.0)*size;
	texCoord[4] = uv + vec2(0.0, -2.0)*size;
	*/
}