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Newcomers DBPro Corner / Slow expansion

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Todeswalzer
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Joined: 13th Apr 2010
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Posted: 28th Apr 2010 12:25
Ok this might be bloody obvious but for some reason something that seems this simple is stumping me, all i want to do is make it so when an object say a sphere comes into contact with say... a box, i want the sphere to expand slowly, now i figured something like this would work :-

bit it seems i was wrong, the sphere just expands instantly and i want it to be a gradual thing, I tried using Step but anything lower than 1 doesn't do anything and 1 just leads to instant resize. This seems to me like such a simple thing but i just can't get my head around it and it's making me feel kinda dumb. Any ideas?
IanM
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Posted: 28th Apr 2010 15:42
You are expanding the sphere in your for/next loop, but not displaying it. The simple fix is to put a SYNC in the loop too. Of course, this will result in nothing else happening until that loop is complete.

BTW, why test for collision again within the loop?

Todeswalzer
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Posted: 28th Apr 2010 15:59
Yeah i realised that i had that duplicated line in there right after i posted it

not quite sure what you mean by putting a SYNC in the loop, do you mean just put the SYNC command alone into the beggining of the loop?
IanM
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Posted: 28th Apr 2010 16:05


TDK
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Posted: 28th Apr 2010 17:23
To expand a little on what Ian said - and for the benefit of those reading that didn't already know:

Using Sync On tells DB that you want to be in charge of screen updates. This includes moving and scaling objects.

You do this with the Sync command and until you issue it, you won't see any changes you make in your program.

In your code, you only had one Sync at the end of the main Do..Loop and that's when DB updated the screen - after the Scale Object loop had finished (and the sphere has been scaled to the maximum size).

TDK

Todeswalzer
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Posted: 29th Apr 2010 00:47
Ta much, works wonders thanks

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