Re: [cc65] tgi_sprite and friends

From: Karri Kaksonen <>
Date: 2012-11-07 05:55:39
On 11/06/2012 10:52 PM, Ullrich von Bassewitz wrote:
> On the C64, the
> mouse driver uses the first slot for the mouse pointer sprite if the default
> mouse pointer routines are used. Who do you think should manage these slots?
> Is this task up to the TGI kernel? How does this work on the Lynx?

The Lynx has no operating system and no desktop. It can only run one 
application and everything is up to the programmer.

> Then there is the action point. While I think it's a good concept, it's rather
> uncommon in the CBM world. And of no real use with the exception of mouse
> cursors.

I fail to see the difference between drawing a bitmap and drawing a 
sprite. All graphics should be drawn somewhere. I assume that even in 
CBM world you may draw the paddles and the ball. Something like 
draw_paddle(x, y) defines where to draw the graphics.

How is it in the CBM world? Do you draw a bitmap at all? If you have 
some code for drawing a bitmap you also choose to  start from a corner 
of the bitmap. Top left? Bottom left? That is your action point!


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Received on Wed Nov 7 05:55:57 2012

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