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DarkBASIC Professional Discussion / sync problem or programming error?

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Vandetta
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Posted: 10th May 2003 04:53
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Ok, attatched is the source for a program to interpolate two textures.

Now look where the sync is...why is nothing displayed on the screen? If I move the sync command and place it right after dot x,y or next x then the program works fine.
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Andy Igoe
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Posted: 10th May 2003 05:03
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You need another sync because your display is being double buffered, just duplicate the sync line.

Pneumatic Dryll
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Vandetta
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Posted: 10th May 2003 11:02
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whats double buffered?

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Nilrem
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Posted: 10th May 2003 17:40
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http://futuretech.mirror.vuurwerk.net/polygons.html Go there then scroll down to double buffered vs single buffered, that should help explain things.

I hear and I forget. I see and I remember. I do and I understand.
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Vandetta
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Posted: 11th May 2003 01:04
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That just confused me even more. It just talked about the advantages and disadvantages of double buffer but it didnt really say what it actually was.

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Andy Igoe
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Posted: 11th May 2003 01:09
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You don't really need to worry too much about what double buffering is as a DB programmer but for a really simple explanation i'll try - not technically accurate but covers the concept:

You draw to a screen in the background, and when it is ready you copy that to the front.

If you drew to the screen in the front and the monitor refreshed before you are finished you may get a half-drawn image.

Pneumatic Dryll
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