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How to rig a 4-wheel steering system?
Ive seen this done wih xPresso, but I’m not clear on how to annimate the two front wheels of my car in tandem as you would in a real car. What can you guys offer in the way of advice and/or tutorials?
Michael Munkittrick
Gainesville, Florida USA -
1 Reply
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You want to setup a hierarchy with some nulls, then link them to a couple of custom UI sliders through a range mapper.
At the simplest, create a custom UI slider. Create 2 xtra nulls. Add one wheel inside each of these Xtra nulls. Create a dummy null called “Control” and add an Xpresso tag to it. Drag the wheel Nulls and the dummy null objects insode this Xpresso window. On the Dummy null go to the output port under USER and select the slider you made. Link this to the H Rotation of the nulls that the wheels are inside of. So now the slider should control the heading of the 2 wheels while still letting them rotate freely “inside” of the parent null.
The rest is cleanup. Like using a range mapper so you can set your slider to percent and set the range mapper to limit 0 – 100% on the slider to the 2 extremes of the rotation values of the wheel nulls. So the slider has the same lock to lock that a real car would have. Repeat the process for the other wheels and the steering wheel inside.
Chris Smith
https://www.sugarfilmproduction.com
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