From:	cwebb AT nospam DOT ctos DOT com (Christopher Webb)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Allegro and Asteroids
Date:	Fri, 13 Mar 1998 20:08:34 GMT
Organization:	SuperNet Inc. +1.303.285.0194 Denver Colorado
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Message-ID:	<350991b8.19264187@news-2.csn.net>
References:	<34F9F4B1 DOT 6CE0 AT home DOT com>
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

On Sun, 01 Mar 1998 15:52:17 -0800, Dan <dyoon AT home DOT com> wrote:

>         float radian_angle = (angle*180)/PI;

>the ship starts off with the front of the ship pointing north, so the
>ship's "angle" variable starts off at 90.  

>so if i just press the up arrow key from the
>start of the game, the ship should go up the screen?  instead it goes at
>some weird angle.
>

Your conversion looks backwards: if angle is degrees, then you need to
multiply by (radians/degrees) to convert it to radians.  Try

float radian_angle = angle * (PI/180);

Christopher Webb
cwebb at ctos.com

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