The Razorback – Part 5: Steering Mechanism Linkages

In this video we look more closely at the steering mechanism linkages. We start out by creating a few ball joints and linkages for the steering. We then work on the rigging of the linkages via some Xpresso and the Range Mapper node.

Covered in this video:

  • Creating some instanced geometry for the push rod ball joints (linkages) that connect the servo motors to the fork tubes.
  • Modeling the ends of the linkages where the ball and socket mechanism exists.
  • Adjusting the Phong smoothing tag and creating some low-poly geometry for the aforementioned parts.
  • Using a Target tag expression with an up vector to ensure that the push rods behave in a believable manner.
  • Using an Xpresso Range Mapper to adjust the travel of the push rods in a non linear fashion (In a very ad-hoc way).
  • District 9 & Firefall as inspiration for geometry at arbitrary angles.


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  1. Man you videos are great. I’m learning so much about modeling just looking at you doing it.

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