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curve

Creates a curve by connecting nodes' transforms to curve CVs.

This modifier generates a curve where each control vertex (CV) is driven by the local transform of a specified node. It's commonly used for visual debugging or helper overlays in rigging.

Options​

  • nodes (node | list[node]): One or more nodes whose local matrices will drive the curve CVs.
  • parent (node): Optional parent for the curve. Defaults to the parent of the first node.
  • degree (int): Degree of the resulting NURBS curve (typically 1 for linear, 2 for quadratic and 3 for cubic).
  • name (str, optional): Custom name for the curve. Defaults to the formatted nice name of the node tag.

Example​

[mod]
helper:
  nodes:
    - spine::ctrls.0
    - spine::ctrls.1
    - spine::ctrls.2
  parent: spine::hooks.mid
  degree: 3
  name: spine_curve

This will create a cubic curve named spine_curve, parented under spine::hooks.mid, and driven by the transforms of the three spine controllers.