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Truck & Trailer rigging on constrained path

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Jaeson Jrakman
Truck & Trailer rigging on constrained path
on Jul 16, 2013 at 7:36:03 pm

I'm attempting to rig a semi-truck and trailer to a constrained path.

I experimented with the following instructions:

[QUOTE] I was just figuring how a normale trailer would work (and define its position/rotation). so what you need, is a dummy at the center of your middle axle of your trailers wheels (depending on how many axles, it's either the midle axle [uneven number of axles] or its between the axles [even number of axles]. call this AxlePivotDummy or something like that.

Then you need a dummy at the pin of your trailer where it is hooked up to your truck (which defines where its going and everything). call this one PinDummy (or propably somethimg more meaningfull.).

You link the PinDummy with your Truck (so it moves with the truck). Then you add a look at constraint from your AxlePivotDummy to the PinDummy. That drives your rotation of the Trailer.

And now you need some sort of PositionConstraint for the Truck that is driven by the PinDummy. Not sure how exactly that could work, but maybe you'll figure that one out ;)

sorry, that it's just half an answer, but maybe it'll point you in the right direction (or anyone else :D)

http://forums.cgsociety.org/archive/index.php/t-1043208.html [/QUOTE]

It seemed to work for me when I was using just two basic primitives. Here's the .max file:


However, when I tried to use the same method with the actual model, I can't seem to get it work. I must have screwed up part of the procedure or something. Here's the file for the complete model:


Any thoughts as to what I 'm doing wrong?

Any help would be greatly appreciated. Thanks in advance!

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Jaeson Jrakman
Re: Truck & Trailer rigging on constrained path
on Jul 16, 2013 at 9:54:37 pm

Here's the latest file that I've been working on. As you can see, I can't get the tail end of the trailer to follow the second dummy.


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