From: "Evangelo Karagiannis" <[EMAIL PROTECTED]>
Sent: Friday, July 13, 2001 5:43 AM
> Hi.
> I am an aerospace student at RMIT University(Australia). I am
trying to draw
> the orbital path of an asteroid on the Canvas3D object.
The really cool way for an aerospace student to do this problem
would be to put the sun and animated asteroid on a J3D scene
graph, integrate the orbital equations, plug the results into
the TransformGroups, log the sequential positions of the
asteroid (saving them into a Geometry trace), and finally
attaching the trace to your scene graph.
Such an approach permits interactivity (change initial or
interim conditions, e.g.), addition of other constructions
(displays of angular momentum, e.g.), and collisions with the
Earth. The work you do building such a simple orbital model
would be directly applicable to pretty decent approximations of
other cool stuff like satellite launch, rendezvous, and docking.
A very few years ago, a person could get a Ph.D. or a critical
slot on a moon mission for solving the docking equations. Now
you can do it in a couple of lines (pages?) of Java code.
You asked :-)
Cheers,
Fred Klingener
Brock Engineering
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