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Poser - OFFICIAL F.A.Q (Last Updated: 2024 Nov 13 11:02 am)



Subject: Animation Confusion


gddesign ( ) posted Thu, 31 July 2003 at 6:44 PM ยท edited Tue, 12 November 2024 at 3:02 AM

Poser 4 - trying to animate a girl riding a bicycle. The bicycle has morphable pedals, crank, and handlebars. Do I parent the feet to the pedals or vise versa? Do I parent the hands to the handlebars or vise versa? At the moment if I turn the crank, the whole girl's body revolves. Help please.


MegaJar ( ) posted Thu, 31 July 2003 at 7:09 PM

Well, I don't think it's even POSSIBLE to parent a figure's hands to something -- they're permanently parented to the figure's forearms. Likewise, the feet are permanently parented to the shins. So you'd need to do it the other way -- parent the pedals to the feet, and the handlebars to the hands. :-) Although, I'm not sure you'd really need to parent the handlebars to anything. I mean, do the handlebars or the rider's hands really MOVE that much when riding a bike?


ockham ( ) posted Thu, 31 July 2003 at 7:15 PM

You can probably parent the hands to the handlebars without any problem. In theory you should be able to parent each foot to a pedal. But it sounds like the pedals are not "counter-rotating" properly. In other words, they are just turning rigidly with the crank. The best solution to this problem would be an ERC "master-slave" within the bicycle, so that the pedals would always move negatively to the crank. If you can't do that, you should manually force the pedals to go opposite the crank so that they will remain in the same position with respect to the universe. At the frame where the crank is at 0 degrees, see where the pedals are; then go to the frame where the crank is at 180 degrees and turn the pedals backward so they are still the same. Then move forward until the crank is 360, and continue turning the pedals so that they are back to original position. (This approach is probably better than trying to figure the degrees on paper, because the two pedals may have opposite values.)

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raven ( ) posted Thu, 31 July 2003 at 10:53 PM

To parent hands to something, turn IK on for the arms. The hands can now be parented and moved by moving the object they are parented to. If IK is on for the legs, then you should be able to parent the feet to the pedals/crank so that they follow the crank rotation. As an aside, Jim Burton has a race type bicycle at DAZ (Premier section) set up so you conform the people to the bike, and the fett follow the pedals.



gddesign ( ) posted Sun, 03 August 2003 at 7:13 AM

Thanks everyone! Got it sorted out now.


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