#version 450 core
out vec2 TexCoord;

void main()
{
    gl_Position.x = (float) (gl_VertexID / 2) * 4.0 -1.0;
    gl_Position.y = (float) (gl_VertexID % 2) * 4.0 -1.0;
    gl_Position.z = 0.0;
    gl_Position.w = 1.0;

    TexCoord.x = (float)(gl_VertexID / 2) * 2.0;
    TexCoord.y = 1.0 - (float)(gl_VertexID % 2) * 2.0;

}