gistfile1.js

var texelMap = {
    0: 3,
    1: 1,
    2: 0,
    3: 2
};


for( fi = 0; faceVerts = uvMat[fi++]; ) {
    for( vi = 0; vi < faceVerts.length; vi++ ) {

        var pos = mesh.localToWorld(
            mesh.geometry.vertices[ texelMap[ vi ] ].clone()
        ).multiplyScalar( tiling ).sub( mesh.position.clone().multiplyScalar( 2 * tiling ) );

        faceVerts[ vi ] = new THREE.Vector2(
            pos.x, pos.y
        );
    }
}