CompuServe Thread

#Cork-Screw animation

4 messages in this thread
#67497From: Holger van KollNov 21, 1993 9:54 AM
I saw an animation at a fair, in which there was shown a cork-screw with a square over it, moving from one side to the other. Within the square, you could see a part of the cork-screw rendered as wire-frame. The part of the cork-screw outside the square was rendered as phong. Does anybody know how to realize this effect?
#67501From: Nov 21, 1993 11:27 AM
Holger: That is an easy effect to create! Just render the entire cork-screw animation in wire-frame first, then use it as an background. Now create your box and give it a matt attribute and animate it wherever you want to see the background. Now render the entire animation again in phong, with the wire frame version as your background, and wherever the matt object is located you will see through it to the background! Greg Pyros
#67520From: Holger van KollNov 21, 1993 3:14 PM
Thanks a lot!!! Holger
#67575From: Don LandisNov 22, 1993 2:19 AM
I could do it in TOPAS one pass, I think, or in 3DS VP in two passes of rendering, once in wire frame, load as a bitmap background, then render phong. I've done this in VP many times to create a wireframe of objects to show "inner workings" of machinery. Kind of like X-ray vision effect. JUst remember to turn on alpha to get it to work.