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I have found the setup to imitate the curve modifier with geometry nodes. And sofar it works great. I have however one problem. The curve modifier keeps "looping" the object around the curve, while the geo nodes setup stops at the beginning/end of the curve. enter image description here

I have currently no idea how I can work around that in the geo nodes setup. Here is the node setup. enter image description here I appreciate any help/ideas in which direction to go.

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    $\begingroup$ Normal · Tangent will always yield zero. You want cross product there instead to produce a 3rd axis. Other than that you want you want to use wrapping (Math node: Wrap or modulo) to wrap the negative x into positive length. $\endgroup$
    – Markus von Broady
    Commented Jul 24 at 7:55
  • $\begingroup$ The Wrap mode never caught my eye, I will definetly remember it in the future, thank you for this useful tip! $\endgroup$
    – STRGnine
    Commented Jul 25 at 18:40

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(Using Blender 4.2.0)

The length of the object to wrap is greater than the length of the curve, and its X coordinate does not start at 0. Consequently, the object is truncated. One approach is to sample the curve by Factor instead of Length. The X coordinate of the object to wrap is normalized between 0 and 1 using a Map Range node. Bounds of X are recovered from an Attribute Statics node.

GN Graph

Resources:

(Blender 4.2.0+)

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    $\begingroup$ Side note: to keep the aspect ratio of the object to wrap, its Z coordinate should be scaled by the length of the curve divided by the length of the object to wrap. $\endgroup$
    – StefLAncien
    Commented Jul 24 at 20:57
  • $\begingroup$ This is it! Thank you!!! How did you hid the unconnected outputs of the Separate XYZ node :)? $\endgroup$
    – STRGnine
    Commented Jul 25 at 18:39
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    $\begingroup$ To hide unconnected sockets, use ctrl+h after selecting a node. $\endgroup$
    – StefLAncien
    Commented Jul 25 at 19:19
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Thank you guys!!! I added a wrap math node as suggested by Markus von Broadly to the setup from StefLancien and achieved the wanted result. Now I can continue wrapping the geometry around the curve beyond the 1 range. enter image description here

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