v3f_2.set(vertices.get(i + 2).x, vertices.get(i + 2).y, 0);
line = new Line(v3f_0, v3f_1);
g = new Geometry("", line);
g.setMaterial(mat);
node.attachChild(g);
line = new Line(v3f_1, v3f_2);
g = new Geometry("", line);
g.setMaterial(mat);
node.attachChild(g);