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Old 05-10-2006, 09:09 PM   #1
mr pix.
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Default RIGID DYNAMICS QUESTION?

RIGID DYNAMICS QUESTION?

Im experimenting with rigid body dynamics and in my scene i have a few objects on a shelf, such as a ball and couple of cylinders for paint tins.

I also have an arm that swings around and knocks them of. Trouble is, the arm obviously has a couple of joints rigged to it and it wont knock over the objects?


ANy ideas?
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Old 05-10-2006, 09:28 PM   #2
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so when you enable the rigid body solver the hand just passes through the objects?
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Old 05-10-2006, 10:13 PM   #3
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when u say enable it. wot do u mean?

I went to Soft/Rigid dynamics > create active rigid body for all obejcts including the arm.

I had gravity connected to the objects, but ..yes the arm just passes through. What am i missing do you think?
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Old 05-10-2006, 10:46 PM   #4
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you need to enable the rigid body solver... found under the 'solver' tab in the dynamics menu... use the help files to learn to set it up
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Old 06-10-2006, 02:39 AM   #5
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Thnks


But from wot i have read, using keyframing and dynamics in tandem is pretty difficult.

ive been able to using active body's before but as i have an rigged arm, i will be keyframing,...its proving pretty tricky

cheers
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Old 06-10-2006, 11:01 AM   #6
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Key framings with dynamics is easy enough, try using the set passive and active keys.
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Old 06-10-2006, 10:58 PM   #7
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OOOhhh got ya. Thank you so much.



so if i want to key frame my arm swinging through the objects to make them fall off, where would i start? Could you explain the basics?



cheers

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Old 16-10-2006, 07:36 AM   #8
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Set a passive key for the arm at frame 0 (say) then move the arm to intersect the object you want to hit, set another passive key. then go one frame more than set an active key, thats about the basics of it.
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Old 16-10-2006, 09:06 AM   #9
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Thanks gster but i did that and i dont know what to key frame, the joint or the geometry.

I detached the geometry (my arm) to ensure it has a passive rigid body connected, then i re-attached.

I then set a passive key at frame 1 and 48 making the arm move. But it doesnt even move.

Its so much easier without joints and skeletons involved but i dont know how to do it with skeletons.

Im creating a short where one of my characters is clumsy and knocks eveything over, thats why i need to learn how to combine keyframing joints with rigid body dynamics.


THANX, KEEP IT COMING!
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