From:	cybpunk AT geocities DOT com (John G)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Tutorial?
Date:	Fri, 12 Mar 1999 06:49:19 GMT
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Thanks,

Actually shortly after posting this ? I ran across that very same
tutorial.  Go figure.  Unfortunately now I am having a problem
compiling my C++ program with 2 classes.  It quits with a whole bunch
of errors similar to this:
c:/djgpp/tmp\cccylwsa(.text 0x28d): pong.cpp: undefined refrence to
'Player::update(bool)'

I included the header files and all so this is really confusing me.
Any thoughts, I would love to hear
TIA
-John

On Fri, 12 Mar 1999 12:14:20 -0800, Edward Hill
<edward_hill AT gec DOT nospam DOT com> wrote:

>John G wrote:
>: 
>: Hello all,
>: 
>: Could someone point me to a good tutorial on implementing dirty
>: rectangles.  I have been trying to think about this, and the only way
>: I could think to do it is to have a tons of conditionals at each place
>: where something is draw to the buffer to check for which rectangle
>: should be set to dirty by testing ranges for x1, rect.x1, x2 and so
>: on).  Is this really what you have to do.  I would think it would
>: actually slow down the program not speed it up.
>
>
>www.perplexed.com/GPMega/

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