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Macer_D
Newbie

Joined: 25/04/2026
Location: United Kingdom
Posts: 5

Posted: 05:42pm 26 Apr 2026

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Hi all, I am using my recently acquired CMM2 to create a paint program for the 12-bit graphics mode - currently am just trying to draw things to the screen. I have run into the problem of moving objects leaving behind undesired trails, and it seems that the cls function is too slow to be called every frame - Things don't render properly when I do it. What would be the best way to go about writing to and clearing from the screen? Thanks for your time.

PhenixRising
Guru

Joined: 07/11/2023
Location: United Kingdom
Posts: 1880

Posted: 08:50pm 26 Apr 2026

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Two possibilities: GETSCANLINE and the other is the "int" option of the MODE command.

It's all in the manual.

LeoNicolas

Guru

Joined: 07/10/2020
Location: Canada
Posts: 572

Posted: 03:41am 27 Apr 2026

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Hi

If you have a limited number of things to move, you can use sprites. I use a lot of them on my game port Knightmare

Another option is using multiple buffers and blit to copy data across them, and rerender only the areas of the screen that were updated, instead of using CLS and rendering the entire screen again.

hhtg1968
Senior Member

Joined: 25/05/2023
Location: Germany
Posts: 184

Posted: 11:51am 27 Apr 2026

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a few weeks or months ago i posted a similar problem by my paint programm. i try to find my question i sent here to the forum.
i think the idea with sprites is a good idea. more to come...

hhtg1968
Senior Member

Joined: 25/05/2023
Location: Germany
Posts: 184

Posted: 11:59am 27 Apr 2026

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hmm. i cannot find my earlier posts...

i asked dico4now and matherp.

i send my source code here and a link to show the problems...

then link to youtube:

movies to show the problems...

the code:

hg.bas.zip

yours heinrich

hhtg1968
Senior Member

Joined: 25/05/2023
Location: Germany
Posts: 184

Posted: 12:00pm 27 Apr 2026

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by the way:

ist there a system to find old posts?

BarryH

Newbie

Joined: 05/01/2025
Location: Australia
Posts: 34

Posted: 12:08pm 27 Apr 2026

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@hhtg1968
To easily find your own posts, go to the MEMBERS link at the top of the page, find your username, and all your posts are listed there.

BarryH

hhtg1968
Senior Member

Joined: 25/05/2023
Location: Germany
Posts: 184

Posted: 12:12pm 27 Apr 2026

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@BarryH: many thanks. that is so easy...

a link to one of my earlier posts...:

earlier posts...

phil99

Guru

Joined: 11/02/2018
Location: Australia
Posts: 3188

Posted: 12:18pm 27 Apr 2026

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paint programm thread
Found using your username and "paint programm" with the normal search button.

hhtg1968
Senior Member

Joined: 25/05/2023
Location: Germany
Posts: 184

Posted: 01:45pm 27 Apr 2026

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@phil99:

cause of using the hint from BarryH i got it.

in earlier tries of searching i do not use my username and therefore to much results...

thank you.

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