From:	ao950 AT FreeNet DOT Carleton DOT CA (Paul Derbyshire)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: converting grades speed ???
Date:	1 Mar 1998 04:57:20 GMT
Organization:	The National Capital FreeNet
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Reply-To:	ao950 AT FreeNet DOT Carleton DOT CA (Paul Derbyshire)
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

BTW if you wish to use the angle measure in grads, there are 400 in a
circle so you'd use cos(angle*pi/200). For degrees you'd use
cos(angle*pi/180). You might want to precalculate pi/200 or pi/180 instead
of redoing this division every time, for speed's sake. (GCC's optimizer
would probably CSE it out and do it once for each cos/sin pair, but this
allows the division to be done once per run of the program.)


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Paul Derbyshire ao950 AT freenet DOT carleton DOT ca pgd73 AT hotmail DOT com

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