Problem with body mass

Mikel
Posts: 54
Joined: Sat Aug 14, 2010 8:59 am

Problem with body mass

Postby Mikel » Mon Feb 13, 2012 11:07 am

Hello how are you?
I have a problem with the mass of a body.
The scene is a beach, I have a field that will make the beach and a boat to be dragged by the waves.
I apply to the field and rigid body motion -> No.
In the boat I apply rigid body motion and -> Yes, that's the problem, the boat flies.
I've put a Daemon Gravity, I touched the mass properties of Rigid Body and the boat still does not make the logical move from being washed away.
What could be?
thanks


Anaxarchos
Posts: 843
Joined: Wed Mar 19, 2008 4:21 pm
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Problem with body mass

Postby Anaxarchos » Mon Feb 13, 2012 12:02 pm

I also found it to be tough to make boats swim, it was nice if there was a formula one could use in order to determine the ideal mass. If your boat happens to be a multibody, maybve this is a little help for you:

http://fkfx.wordpress.com/2011/09/22/realflow-rigid-bodies-caronte-getting-an-objects-mass-value/
www.fk-fx.com

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bitSeq
Posts: 1044
Joined: Thu Jul 10, 2008 9:48 am
Location: UK - Stuart Armiger
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Problem with body mass

Postby bitSeq » Mon Feb 13, 2012 12:13 pm

There is a way to obtain a nearly optimal mass for an object to reach equilibrium in a fluid.

If you add a realwave to the scene and then you will notice at the bottom of the rigid body Realwave settings there is a balanced mass button, click that and rf will work out the mass required to be balanced with the fluids. Bear in mind that this probably uses a standard model to compute the weight, probably a liquid density of 1000 and gravity 9.8.

I have noticed that this can sometimes be buggy and not work until you have moved the object, realwave or changed the mass manually before hand.

Hope that helps.

Mikel
Posts: 54
Joined: Sat Aug 14, 2010 8:59 am

Problem with body mass

Postby Mikel » Mon Feb 13, 2012 12:23 pm

Ok thank you very much for your help
A greeting


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