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2D All the way! / sprite bug putting sprites on a background

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codewarrior
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Joined: 29th Apr 2003
Location: United States
Posted: 29th Apr 2003 21:48
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I am new to DB but not new to Basic...I've seen others post problems with sprite bugs and I think the one I found is a DB version problem. I got the book "Beginners guide to DB programming" and this is a code snippet from the book trying to put an F15 sprite on top of a background. The way the code is now it loads my F15 image with transparency for black pixels but the background fails to load, it gives me a blue background instead...it acts this way in DBPro but I tried it in a DB1 demo and the code works correctly. Anybody seen a workaround for this??
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IanM
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Location: In my moon base
Posted: 30th Apr 2003 00:19
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Yep. Use BACKDROP OFF, or use COLOR BACKDROP to set it to the colour of your choice.

It's one of the known differences - DBPro uses 3D acceleration to draw sprites.
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CloseToPerfect
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Joined: 20th Dec 2002
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Posted: 30th Apr 2003 03:21
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All I do to get rid of the blue screen is use
Set Sprite sprite#,0,1
For some reason if I use Backdrop Off my fps drop by 50 fps or more, in a game I'm working on just using sprites and 2d in 800x600 I get 105 fps with out using the backdrop off and I get 57 when I use backdrop off. weird isn't it? You'ld think it would speed up not using the backdrop. Anyway after I set the first sprite like 'Set Sprite 1,0,1' the blue screen goes away.


CTP

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Richard Davey
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Posted: 30th Apr 2003 05:14
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codewarrior - there is a tutorial dedicated to solving this problem in DBPro available from this site.

Cheers,

Rich

"Gentlemen, we are about to short-circuit the Universe!"
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codewarrior
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Posted: 30th Apr 2003 08:41
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Rich,
Which Tutorial is it?? I have 1 thru 11 downloaded...thanks in advance...
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Richard Davey
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Posted: 30th Apr 2003 14:34
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Time to read number 10 again then

Cheers,

Rich

"Gentlemen, we are about to short-circuit the Universe!"
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