> In "hardware", I think you may be able to use 2 appropriately > oriented parallel ModelClip planes to achieve the effect. This would > produce a ring actually, but if the distance between the clip planes is > small enough it will look like a line contour. Haven't tried it, > but looks like it would work.
I tried that for creating 2D profiles from terrain shaped hydrogeological layers. I created two parallel ModelClip planes with a small distance between them, cutting my 3D scene. The problem is, that your 3D shapes have no "thickness". So after cutting the 3D scene and moving your viewplatform for achieving the 2D-view, you would not see a proper circle, because when you look directly along the normal of your cutting plane you can not see that part of the circle, because it is "thin". The outline will have a perspective effect. I can not explain that very well. The last picture on my homepage shows a profile of some hydrogeological layers, created with that approach. You can not say for sure if you are really seeing the entire profile. http://www.ipf.uni-karlsruhe.de/Personen/hilbring/hilbring.html Desiree > > > >On Wed, 9 Oct 2002 07:50:48 -0700, Scholl, Ed <[EMAIL PROTECTED]> wrote: > > >Hello- > >Can anyone give me some pointers to draw the 2D outline obtained from the > >intersection of a cutting plane with my 3D world? i.e. if I specify a > >cutting plane that intersects with a sphere, I want to display the resulting > >circle. > > > >-Ed > > > > ========================================================================== > >To unsubscribe, send email to [EMAIL PROTECTED] and include in the body > >of the message "signoff JAVA3D-INTEREST". For general help, send email to > >[EMAIL PROTECTED] and include in the body of the message "help". > > =========================================================================== > To unsubscribe, send email to [EMAIL PROTECTED] and include in the body > of the message "signoff JAVA3D-INTEREST". For general help, send email to > [EMAIL PROTECTED] and include in the body of the message "help". > =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
