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Cow Update: The Vehicle Rig

In this tutorial, I show you how to build an expression-based vehicle rig that automatically calculates the rotation of its wheels based on the movement of the vehicle chassis. This is a great technique for animating anything with a wheel in it. Check it out!

If you’re looking for the expression code to add to your personal library, here it is:

d=width;
pi=Math.PI;
circ=d*pi;
rot=360/circ;
movex=thisComp.layer(“body”).transform.position[0];
scaler=thisComp.layer(“body”).transform.scale[0]/100;
rot*movex/scaler

Be sure to rename your vehicle chassis layer to “body” so that the expression works. Or, simply change the the two bits of code in the expression to match your parent layer’s name. Enjoy!

 

  1. Hey
    thanx for the tutorial one of the coolest expression i”ve seen
    very usefull
    thanx

  2. Thank you sooooooo much for these excellent tutorials ;o)
    The Vehicle Rig, The Droste Effect, Analyzing Motion are warm and beautiful presentations.
    But I am frustrated. I cannot see the Cube series. When I am on the CC site, those 4 flv won’t charge… I see Video Loading… but it sticks there… I have raised the issue on CC as have others… but their response has not helped. I can see most of the tutorials on CC. Once in a while, there are those I cannot see.
    And missing out on your heartwarming, brain nourishing presentations that titillate my imagination… you understand why I am frustrated.
    Would you be so kind and tell me how I can download these tutorials please ? I was able to download the tutorial exercise files from CC.
    Thank you, merci beaucoup
    sara

  3. Sara –

    Thanks for bringing this to my attention. I’ll see what I can do about getting the tutorials updated – Currently, they’re in quicktime format whereas the others your mentioned are in flash.

    Thanks for the feedback.

    Hartwarmingly brainnourishing… Ha; that may have just made my day!

    Carl

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