/*
Matrix.rotate(new Vec(0,0,1), (float)(1*Math.PI/2)),
Matrix.rotate(new Vec(0,0,1), (float)(2*Math.PI/2)),
Matrix.rotate(new Vec(0,0,1), (float)(3*Math.PI/2)),
/*
Matrix.rotate(new Vec(0,0,1), (float)(1*Math.PI/2)),
Matrix.rotate(new Vec(0,0,1), (float)(2*Math.PI/2)),
Matrix.rotate(new Vec(0,0,1), (float)(3*Math.PI/2)),