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