Set Curve Normal Node
The Set Curve Normal controls the method used to calculate curve normals for every curve.
The node doesn't set the normals directly, those are calculated later as necessary. Combined with the tilt attribute value at each control point, this will define the final normals accessible with the 法线节点.
Internally this node adjusts the values of the
normal_mode attribute on each curve.
Standard geometry input, containing curves.
Whether or not to change the value on each curve.
The method for evaluation of the curve's normals
- Minumum Twist
The final normals are calculated to have the smallest twist around the curve tangent across the whole curve.
The final normals are calculated so that they is perpendicular to the Z axis and the tangent. If a series of points is vertical, the X axis is used