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Newcomers DBPro Corner / how to rotate a sprite?

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squids
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Posted: 11th Jun 2003 13:11
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Hey,

I cant quite ge this right. Any ideas on how I can rotate a sprite 360 degrees over a 1 second lapse(roughly). That make any sense?

Thank you,
Ash.
.Arf..
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IanM
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Posted: 11th Jun 2003 13:18
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Assuming a sync rate of 60, you could use something like this:

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squids
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Posted: 11th Jun 2003 13:25
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How was that so easy for you, lol. Thanks

I spent a while trying to get it to rotate,.. I suck,!

Just wondering,. The sprite I am rotating is a rectangle (pong paddle basically).. How would I go about making it rotate from its center and not its like top left coords. Any Ideas?

Cheers,
Ash.

.Arf..
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IanM
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Posted: 11th Jun 2003 13:28
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Just use the OFFSET SPRITE command to move it's positioning/rotation point to its centre.

OFFSET SPRITE 1, SPRITE WIDTH(1)/2, SPRITE HEIGHT(1)/2
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squids
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Posted: 11th Jun 2003 13:43 Edited at: 11th Jun 2003 13:45
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Ah, okay.

Thank you, that has totally solved my problem however one very final question. When using this:


It works fine, but now I am having a blue screen problem after it has rotated >.< it flashes to a blue screen after it has rotated the sprite.

Ive tried CLS sync and set current bitmap all over it but, you guessed it I cant make it work without flashing to the blue screen Any idea what I could try ?

Does that make sense?
Soz,
Ash.

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IanM
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Posted: 11th Jun 2003 13:49
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Download and have a read of a tutorial specifically for this problem.

http://www.darkbasicpro.com/tutorials.php - It's tutorial 10 you need to look at. That will give you several methods of dealing with this, and you can pick the most appropriate one.
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squids
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Posted: 11th Jun 2003 14:00
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couldnt quite get anything to work,. but hey,. I got it down to a real quick blue flick,. better than nothing,. Thanks a lot for the help.

Ash.

.Arf..
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IanM
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Posted: 11th Jun 2003 14:04
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Another 'quick' method I've used is to set the backdrop colour:

COLOR BACKDROP rgb(0,0,0)

I either use that, or switch off the backsave option on the sprites.
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squids
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Posted: 11th Jun 2003 14:06 Edited at: 11th Jun 2003 14:07
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Ill have a play with it all, cheers dude.

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