Viewpoint Scaling
- To: mathgroup at smc.vnet.net
- Subject: [mg16671] Viewpoint Scaling
- From: "Naum Phleger" <naum at condor.physics.ucsb.edu>
- Date: Fri, 19 Mar 1999 12:54:17 -0500
- Organization: UCSB
- Sender: owner-wri-mathgroup at wolfram.com
I have received lots of help, but what I really want to know is the
algorithm that is used to scale the points in the ViewPoint option for 3D
graphics. Here is a simple example that illustrates the problem. Here are
the points that I want to view my globe from (in {x,y,z} form).
{1,0,0} {sqrt 2, sqrt 2,0} {1,0,0} {-sqrt 2,sqrt 2, 0} {-1,0,0}, ...
or in {r,theta,fi} form
{1,0,0} {1,0,pi/4} {1,0,pi/2} {1,0,3pi/4} {1,0,pi} ...
The problem I have is that with this list, the odd points give a smaller
image back, and it is of set because the box is oriented differently.
What I want to do is enter my view points in such a way that the only
difference between successive images is a rotation, no translation or
scaling. Where can I find the algorithm that Viewpoints uses? Thank you
for any help.
--
Naum Phleger
Gwinn Group: Naum's House:
University of California 6735 Trigo Rd. Apt. A
Santa Barbara, CA 93106 Isla Vista, CA 93117
Phone: (805) 893-8656 Phone: (805) 961-8282
naum at condor.physics.ucsb.edu