Comments on: Dynamics Demo http://3d-metropolis.com/art/dynamics-demo Digital Art, Writing, and more by Scott Drake Mon, 05 Mar 2012 20:00:27 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Scott http://3d-metropolis.com/art/dynamics-demo/comment-page-1#comment-23 Scott Tue, 27 Nov 2007 10:13:27 +0000 http://3d-metropolis.com/art/dynamics-demo#comment-23 Thanks Nathaniel! One of the capsules does fly out of the system here, but things were far worse while I was working with the dynamics system to get the motions down as they are shown. Old Max dynamics were a lot less kind than Havok. From memory, the arm's joints were each limited as much as possible, to make sure the IK solution had the arm moving in a very mechanical fashion. The vertical piston which telescopes and apprears to move the arm up and down took a bit of time to figure out, ultimately requiring a pivot at the base plus a dummy target for the upper shaft to follow that was fixed to the underside of the arm. The neat thing about this sort of mechanical apparatus is once you set the link hierarchy and joint limits it is pretty easy to animate, you just drag around a final target and watch all of the joints respond. Thanks Nathaniel!

One of the capsules does fly out of the system here, but things were far worse while I was working with the dynamics system to get the motions down as they are shown. Old Max dynamics were a lot less kind than Havok.

From memory, the arm’s joints were each limited as much as possible, to make sure the IK solution had the arm moving in a very mechanical fashion. The vertical piston which telescopes and apprears to move the arm up and down took a bit of time to figure out, ultimately requiring a pivot at the base plus a dummy target for the upper shaft to follow that was fixed to the underside of the arm.

The neat thing about this sort of mechanical apparatus is once you set the link hierarchy and joint limits it is pretty easy to animate, you just drag around a final target and watch all of the joints respond.

]]> By: Nathaniel http://3d-metropolis.com/art/dynamics-demo/comment-page-1#comment-22 Nathaniel Mon, 26 Nov 2007 18:48:04 +0000 http://3d-metropolis.com/art/dynamics-demo#comment-22 That's actually pretty cool. I never figured out the whole dynamics thing. I can totally see what you're talking about with the pills just wildly bouncing off out of control. Still, that's really impressive. Oh, what constraint did you apply to the hydraulic arm to get that one piece to only move in and out? I've got to admit, the kinematics on that arm is very well done too. Nice job all around. That’s actually pretty cool. I never figured out the whole dynamics thing. I can totally see what you’re talking about with the pills just wildly bouncing off out of control.

Still, that’s really impressive.

Oh, what constraint did you apply to the hydraulic arm to get that one piece to only move in and out? I’ve got to admit, the kinematics on that arm is very well done too. Nice job all around.

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