Mesh > Mesh Curves > Mesh Extract Theoretical Intersection

Creates theoretical intersection curves on a mesh that can later be used for surface development.

Can also create feature curves approximations.

Mesh Extract Theoretical Intersection Control

Theoretical Intersection Curve: Turn on this option to calculate the theoretical intersection curve.

If using the curve method, this option must be on, as this is the only curve calculated.

See To extract a theoretical curve from a mesh (curve method).
Feature Curve Approximation: Turn on this option to create the approximation feature curve. It is visible as a degree 1 curve when you exit the tool.

This only applies when using the points method.

See To extract a theoretical curve and feature curve approximation from a mesh (point method).
Show Curvature Evaluation: Turn on this option (default) to shade the mesh with Curvature Diagnostic Shading when it is selected.
Tangent line distance: Radius of the tube that defines the region where the curve(s) are built.

Tangent lines are displayed at the intersection of the tube with the mesh after the theoretical intersection curve is first calculated.
Sampling factor over tangent line: This value multiplies the Tangent line distance to specify the maximum distance from the outside of the tube that is included in the calculations.

Ensure that this distance covers mostly flat regions, and does not include other sharp features.

Control Options

Auto Recalc.: When this option is turned on, the curves are recalculated automatically when a value is changed in the option window, without the need to click the Recalc button.