ChangeUV

/*
All credit for this code goes to cgaudino. I just rewrote his function in js and made some minor changes.
Don't forget to change the scale:Vector2 values to match your spritesheet. Ideally it should be passed on the function arguments.
*/

function ChangeUV(plane:GameObject, offset:Vector2)
{
    //Modify quad uvs
    var spriteMesh:Mesh = plane.GetComponent(MeshFilter).mesh;
    var scale:Vector2 = Vector2(0.125, 0.25);
    var uvs:Vector2[] = new Vector2[4];
    uvs[0].x = offset.x;
    uvs[0].y = offset.y - scale.y;
    uvs[1].x = offset.x + scale.x;
    uvs[1].y = offset.y;
    uvs[2].x = offset.x + scale.x;
    uvs[2].y = offset.y - scale.y;
    uvs[3].x = offset.x;
    uvs[3].y = offset.y;

    spriteMesh.uv = uvs;
}