Message-ID: <19981124121217.3615.qmail@hotmail.com>
X-Originating-IP: [195.44.9.66]
From: "a j" <aj664 AT hotmail DOT com>
To: djgpp AT delorie DOT com
Subject: RE: More help with Allegro (mouse on border)
MIME-Version: 1.0
Content-Type: text/plain
Date: Tue, 24 Nov 1998 04:12:17 PST
Reply-To: djgpp AT delorie DOT com

>> I'm using DJGPP & Allegro and am currently trying to code a puzzle
>> game.  The main screen is comprised of a 9x9 sprite grid.  I have a
>> way to access all of the coordinates, but I'm still wondering how to
>> get the program to check when the cursor is at a border of the 
screen.
>
>int OnBorder(int x_mouse, int y_mouse)
>{
>	if(x_mouse == 0)		return 1;	/* Left Border   */
>	if(x_mouse == SCREEN_W)	return 2;	/* Right Border  */
>	if(y_mouse == 0)		return 3;	/* Top Border    */
>	if(y_mouse == SCREEN_H)	return 4;	/* Bottom Border */
>	return 0;
>}


this code will not work as SCREEN_W  is one more than the mouse will
go to.

 

>
>This is one easy way of doing it. If the function returns 0, then no 
border
>is touched by the mouse. If 1, then left border, 2 then right border 
etc.
>
>This is a very simple method and there are far more elegant ways of 
doing
>it.
>
>James Arthur - jaa AT arfa DOT clara DOT net
>http://www.arfa.clara.net/james/
>ICQ#15054819
>
>


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