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Re: How to change the 3D visual angel? [message #59685]

Mon, 07 April 2008 11:11

rtowler
Messages: 28
Registered: June 2006

Junior Member

On Apr 5, 7:53 am, FOX <20thfox...@gmail.com> wrote:
> I use IDLgrVolume to plot volume data
> but there is something wrong with the visual angel, no matter how i
> rotate the model, the angel it's not good. i want to output the volume
> as xvolume or ivolume's default visualization.
> anything more than model rotate?

Yes, the dark angel of IDL object graphics is at work here ;)

This is a simple case of understanding OpenGL transformations which,
because we expect things to move on the screen as they do in life,
aren't intuitive. This is why I wrote an object graphics camera class
which you should take a look at:

http://www.acoustics.washington.edu/~towler/RHTgrCamera.html

For simplicities sake, I recommend starting with camera__define.zip
located at the bottom of the page. Using my camera class you'll be
able to manipulate your volume more intuitively. If you wish to
ultimately view the volume in iTools (I couldn't really tell from your
email), you can modify the camera code to output the transformation
matrix used to create the view you are interested in and then apply
that to your model before passing it to the iTool.

-Rick

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[Message index]

		Re: How to change the 3D visual angel? By: rtowler on Mon, 07 April 2008 11:11
		Re: How to change the 3D visual angel? By: Magic.Zhou on Sun, 06 April 2008 05:31
		Re: How to change the 3D visual angel? By: David Fanning on Sat, 05 April 2008 09:54
		Re: How to change the 3D visual angel? By: d.poreh on Sat, 05 April 2008 09:20
		Re: How to change the 3D visual angel? By: fox on Sat, 05 April 2008 09:14
		Re: How to change the 3D visual angel? By: David Fanning on Sat, 05 April 2008 08:14
		Re: How to change the 3D visual angel? By: fox on Mon, 21 April 2008 02:27

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