this.shared = shared;
this._csg_plane = Plane.createFromPoints(
vertices.get(0).pos,
vertices.get(1).pos,
vertices.get(2).pos);
<BUG>this.plane = eu.mihosoft.vvecmath.Plane.fromPoints(
vertices.get(0).pos,
vertices.get(1).pos,
vertices.get(2).pos);</BUG>
validateAndInit(vertices);

this.shared = shared;
this._csg_plane = Plane.createFromPoints(
vertices.get(0).pos,
vertices.get(1).pos,
vertices.get(2).pos);
this.plane = eu.mihosoft.vvecmath.Plane.
fromPointAndNormal(centroid(), _csg_plane.normal);
validateAndInit(vertices);
