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
Lines: 15
Message-ID: <6daprg$scc@freenet-news.carleton.ca>
References: <6d8rsg$gc4$1 AT o DOT online DOT no>
Reply-To: ao950 AT FreeNet DOT Carleton DOT CA (Paul Derbyshire)
NNTP-Posting-Host: freenet3.carleton.ca
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Precedence: bulk



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.)


--
    .*.  Friendship, companionship, love, and having fun are the reasons for
 -()  <  life. All else; sex, money, fame, etc.; are just to get/express these.
    `*'  Send any and all mail with attachments to the hotmail address please.
Paul Derbyshire ao950 AT freenet DOT carleton DOT ca pgd73 AT hotmail DOT com