Path: chuka.playstation.co.uk!news
From: "John Whitmore" <john@jwhit.demon.co.uk>
Newsgroups: scee.yaroze.programming.2d_graphics
Subject: 2 Questions - Same Game
Date: Mon, 19 Oct 1998 12:30:31 +0100
Organization: PlayStation Net Yaroze (SCEE)
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Hi,
    I was wondering if anyone out there could help me?  I am producing a 2D,
tile based game for my Final year University Project.  This is my first
question:

    When using GsBG (GsCELL,GsMAP) what is the most efficient way of
checking the value of the cell the PC character is 'standing' on?
I.E. how can I tell if a cell is walkable/non-walkable for collision
detection.  I also wish to use this technique for the collection of bonuses
within the level etc.

    Secondly a maths question, when moving my character around I wish to
store a vector (x,y) of the direction it is facing so a weapon can be fired
using this same vector.  how is best to calculate this vector so it can be
used in this situation?
I have tried using the rotational value of the sprite, as this is how I am
changing the visual appearance of the sprite on screen, but with no success.
        Thanks in advance,

                John