Path: utzoo!attcan!uunet!cbmvax!rutgers!psuvax1!julius.cs.uiuc.edu!usc!ucsd!hub.ucsb.edu!ucsbuxa!6600mage
From: 6600mage@ucsbuxa.ucsb.edu (Orion Wilson the Passable)
Newsgroups: comp.sys.amiga.tech
Subject: Integer sine calculations?
Keywords: assembly integer sine
Message-ID: <7336@hub.ucsb.edu>
Date: 21 Nov 90 18:57:00 GMT
Sender: news@hub.ucsb.edu
Distribution: comp
Lines: 29


	Ok.
ok ok ok ok.
	
	.. Have you seen these hacker demos where
the balls or whatever follow sinusoidal paths around
the screen? And where there are HUNDREDS of balls
all going very smoothly through what appear to be
complex hypo-cycloids and such?  
My question is how these paths are computed. The
number of objects and their speed incidates that
they aren't being done by floating-point techniques,
and i'm pretty sure the numbers are not
pre-calculated, so it seems that smooth curves like
the sin and cos can be done using integer (native
MC68000) arithmatic.
	
	Is this so? Does anybody out there know what
these algorythms are? Am i posting in the wrong
area? And why hasn't my mouse come home?

	For the answers to these questions and more,
	 please write me so i may learn.


--
6600mage@ucsbuxa.ucsb.edu        ##	These are
				 ##  Secrets of
###################################  Melodious Monk