Add points into myCanvas3D (Java3D)

[Flex]

I have a canvas3d in Java3D, and I want to add some point.
I try to to this.

private void drawPoints() {
PointArray pti = new PointArray(2,Po intArray.COORDI NATES);
Shape3D shape = new Shape3D();
shape.removeAll Geometries();
BranchGroup ptiGroup = new BranchGroup();

pti.setCoordina te(0, new Point3d(3, 5, 23));
pti.setCoordina te(1, new Point3d(0, 5, 7));

shape.addGeomet ry(pti);
ptiGroup.addChi ld(shape);
ptiGroup.compil e();
universe.addBra nchGraph(ptiGro up);
}

But I don't see nothing. Why ?

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FleX