[JAVA3D] problem with ortagonal view

[A. Murat Tanyer]

Can anybody describe me how the ortho method in Transform3D class works. The method is:

public void ortho(double left,
                  double right,
                  double bottom,
                  double top,
                  double near,
                  double far)

But how can I calculate the values in the paranthesis? Are those values related with the BACK_CLIP_DISTANCE and FRONT_CLIP_DISTANCE?

I am trying to get the parallel projection view of my scene but
view.setProjectionPolicy(View.PARALLEL_PROJECTION);
method causes a problem. My scene comes to the location of eye so I cannot see my scene except the whole canvas is coverer by a single object.

Thanks