[Raytrace] rotation, special aperture ,ellipse, BUG, with OSLO LT ? (fwd)

[Jasmin Gauvin]

---------- Forwarded message ----------
Date: Wed, 5 Mar 2003 13:47:33 +0100 (MET)
From: Jasmin Gauvin <gauvin@ifh.de>
To: dcs@sinopt.com
Subject: Problem, BUG ?


	Hi, i am designing a simple system of our science
facility with your nice software and a library working on
matametica.

	I have presently since 2 WEEK! a big problem to only
plot a simple ELLIPSE.

	I WANT to use it in a way looking like the plank
telescope if you want.

	THE PROLEM IS THE FELLOWING:

	first
		i put a finite distance object.
	second
		i draw a ellipse (don't work too much with a ellipse too).

	thrid
		i rotate 90 deg (like tla=90) the ellipse.

	RESULT:

	I.it's seem impossible to get a good looking DRAW
and it's is absolutly necessary to put a really large aperture
number like 500.

 	II.when i compute manually the foci and move the source
to it i never have get (up to now !) the second foci !


i feel quite bad because it's the only a test before moving
to the real problem.

so please if you can send me a answer or BETTER a file with
a parabolla or ellipse showing the seccond focci i think it
the better understand what going on.

regard,

        jasmin gauvin

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