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Index › Programming Questions & Help › Programs › Simulating inertia (physics)
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Simulating inertia (physics)? (Read 589 times)
nickdatz
Simulating inertia (physics)?
Oct 24th, 2006, 4:32pm  
Hi friends,
I'd like to simulate inertia in processing. As an example, I'd like an object to move up/down when I move the mouse pointer, and when the mouse pointer stops, the object would keep on moving for a while until it stops. I've seen this kind of effect used for scrollbars and such on the web.

How can I do that? I'm just starting at working with processing.
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nickdatz
Re: Simulating inertia (physics)?
Reply #1 - Oct 25th, 2006, 4:49pm  
Just in case someone is interested, i found this example out there regarding a similar idea on a flash movie:

inertia=0.9;
k=0.1;

x = -object.x + mouse.x
y = -object.y + mouse.y

xp = xp*inertia+x*k;
yp = yp*inertia+y*k;

object.x = object.x + xp;
object.y = object.y + yp;
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