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Rigging a train on a curve has it's problems. The cars have a fixed length and the tighter the radius of the curve, the more the car will cut corners. So a fixed offset will be too long.

My current solution is a bit convoluted:

choo choo

  • I make empties track the main path.
  • I control a helper curve with hooks so the helper curve fits the main path reasonably well. The more empties, the better.
  • I use a Spline IK Constraint for the bones.

I do that because I cannot seem to move the IK constraint up or down the curve.

Is there a simpler way? I could do it with Python and iterations, but I wonder whether there's an inbuilt method I have overlooked.

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  • $\begingroup$ What about this method? youtube.com/watch?v=OM9Nso_ncEk $\endgroup$
    – Crantisz
    Commented Mar 30, 2018 at 8:07
  • $\begingroup$ @Crantisz No idea. It's not an answer and I have 64kbit internet, so any attempt to watch it from here is futile. $\endgroup$ Commented Mar 30, 2018 at 8:15

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You may wish to consult the following Web page. https://blenderartists.org/t/train-follows-track-whats-the-right-combo-of-constraints/531763 (2023-09.at)

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    $\begingroup$ While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes. - From Review $\endgroup$
    – Harry McKenzie
    Commented Sep 13, 2023 at 3:26

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