uniform mat4 projMat;
uniform mat4 spriteMat;
uniform vec2 texSizeInv;
attribute vec2 position;
attribute vec2 texCoord;
varying vec2 v_texCoord;
void main()
{
gl_Position = projMat * spriteMat * vec4(position, 0, 1);
v_texCoord = texCoord * texSizeInv;
}