From: Martin Ambuhl <mambuhl AT earthlink DOT net>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Trig
Date: Sat, 01 May 1999 12:39:42 -0400
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Paradox wrote:
> 
> How do I use Trig to determine the reverse slope of an object traveling at n
> degrees? And vise versia?
> 
> Paradox

Since you are using gcc, <math.h> will provide M_PI, as long as you are not
compiling in ANSI mode.  This allows you to convert an angle from degrees into
radian measure:

#define radians(a) )(a)*(M_PI/180.))

The slope (dy/dx) is just tan(radians(angle)).

This is extremely simple math and should be learned before attempting such
programming.  

-- 
Martin Ambuhl (mambuhl AT earthlink DOT net)
Note: mambuhl AT tiac DOT net will soon be inactive