#version 100

precision mediump int;
precision mediump float;

uniform mat4 worldViewProj;
attribute vec4 vertex;
varying vec2 uv0;
varying vec2 uv1;
varying vec4 pos;

void main()
{
	// Use standardise transform, so work accord with render system specific (RS depth, requires texture flipping, etc)
    gl_Position = worldViewProj * vertex;

    // The input positions adjusted by texel offsets, so clean up inaccuracies
	vec2 inPos = sign(vertex.xy);

    // Convert to image-space
    uv0 = (vec2(inPos.x, -inPos.y) + 1.0) * 0.5;
    uv1 = inPos.xy;
}