Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!rutgers!cmcl2!lanl!opus!mlandis From: mlandis@nmsu.edu (Marvin Landis) Newsgroups: comp.sys.amiga Subject: Re: sa4d Keywords: Sculpt Animate keyframe animation Message-ID: <330@opus.NMSU.EDU> Date: 25 Sep 89 17:16:09 GMT References: <0160.AA0160@sosaria> Reply-To: mlandis@opus.UUCP (Marvin Landis) Organization: New Mexico State University Lines: 38 In article <0160.AA0160@sosaria> Chris Brand (wizard@sosaria.UUCP) asks: > What is the easiest way to produce a proper looking free fall with > keyframe animation in Sculpt Animate 4D (or 3D)? You will need to use several keyframes for the ball to drop, and then again for the ball to rise. In the simple diagram below, I am assuming there is the same number of frames between each keyframe: o Position of the ball in keyframe 1 o Position in keyframe 5 (Maybe a little overlap with position in 1) o Position in keyframe 9 o Position in keyframe 13 o Position as it hits the ground in keyframe 17 --------------- As the diagram shows, just position the ball closer to its previous position when the ball is moving slowly at the top of its bounce, and farther from its previous position when its moving faster. Of course with keyframes you can squash and stretch the ball in appropriate positions to achieve the effect you desire. You might even be able to use the spline idea to help determine where the best positions are for the ball in each keyframe, just create the spline and use it as a "template" to manually position the ball in each key frame instead of letting SA do it automatically. As for the problem you are having with "Not enough memory" errors, if I recall correctly that is what happens if you are running Morerows on your system disk. If that is the case, get rid of morerows and see what happens Marvin Landis mlandis@nmsu.edu