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DarkBASIC Discussion / bouncing ball

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HomerS
10
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Joined: 8th Apr 2007
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Posted: 22nd Oct 2014 21:18
Hi all,

How is life in the classic dark basic?

I made some code for a random bouncing ball.

+ Code Snippet

It looks like it flickers. Is there something to do about that?

With div studio (old basic program) i could use a double buffer. I don't know if that is possible in dbc (i can't find it in the help-files)?

Greetings!

Toedeledoki
Latch
11
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Joined: 23rd Jul 2006
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Posted: 23rd Oct 2014 01:25 Edited at: 23rd Oct 2014 08:36
I don't believe what you are seeing is a flicker but more likely a slow enough refresh rate on your monitor that you can see the ball's last position fading out after it's new position is drawn. You are using a sprite so it's not subject to the cls command. The faster the ball, the easier it is to see the last and current positions at the same time. I've noticed this effect more with LCD/LED type monitors than the old CRT monitors.

Double buffer? Well there are settings in the setup.ini that has some control over the 2d drawing; but you can also use an offscreen bitmap to draw what you want then transfer it to bitmap 0 (creating your own drawing buffer).

for example:

+ Code Snippet

Enjoy your day.

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