Orthographic Proj + PolarView

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2 total messages Started by Dan S Reznik Mon, 25 Jan 1993 23:42

#130

Author: Dan S Reznik
Date: Mon, 25 Jan 1993 23:42

14 lines
850 bytes

I am having difficulties making anything appear on the screen when I
combine ortho() with polarview(). if instead of ortho() I use
perspective() everything works fine. Specifically, I am trying to view
a cubical array of voxel centered around (0,0,0). For that I do

   ortho(-A, A, -A, A, -A, A); /* A is bigger than the volume's radius */

and then

   perspective(...);

what's wrong ?

Dan

Re: Orthographic Proj + PolarView

#135

Author: Terran Boylan
Date: Tue, 26 Jan 1993 01:34

15 lines
1306 bytes

In article <REZNIK.93Jan25154256@robios2.me.wisc.edu>, reznik@robios.me.wisc.edu (Dan S Reznik) writes:
> I am having difficulties making anything appear on the screen when I
> combine ortho() with polarview(). if instead of ortho() I use
> perspective() everything works fine. Specifically, I am trying to view
> a cubical array of voxel centered around (0,0,0). For that I do
> 
>    ortho(-A, A, -A, A, -A, A); /* A is bigger than the volume's radius */
                         ^^^^^
You need to swap these two.  Yeah, I lost a good 4-5 hours one night on this one.
Read the man page for an explanation.

---
Terran J. Boylan, Sr. Artist/Programmer | "It's better to have loved
Engineering Animation, Inc.,  Ames, IA  | and lost than just to have
(515) 296-9908 / (515) 296-7934 (> 5PM) | lost." -- Dorky Dog

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