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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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