Curves Approximate

Curves Approximate
Menu location
Curves → Approximate
Workbenches
Curves
Default shortcut
None
Introduced in version
-
See also
None

Description

The Curves Approximate tool approximates points to NURBS curve or surface.

Usage

1. Select one or more objects that contain at least two vertices each.
2. There are several ways to invoke the tool:
   • Press the Approximate button.
   • Select the Curves → Approximate option from the menu.
3. An Approximation_Curve object is created for each selected object.
4. Optionally edit the values in the Property editor to choose a different approximation method and parametrization type and also adjust the related properties (see Properties below).

Properties

See also: Property editor.

An Approximation_Curve object is derived from a Part Feature object and inherits all its properties. It also has the following additional properties:

Data

Approximate

• DataPoint Object (Link): Object containing the points to approximate.

General

• DataApprox Tolerance (Float): Approximation tolerance.
• DataClamp Ends Tolerance (Bool): Clamps endpoints.
• DataClosed (Bool): Forces a closed curve.
• DataContinuity (Enumeration): Desired continuity on the curve.
• DataDegree Max (Integer): Maximum degree of the curve.
• Data Degree Min (Integer): Minimum degree of the curve.
• DataMethod (Enumeration): Approximation method.
  • Parametrization (default): ...
  • Smoothing Algorithm: ...

Parameters

• DataCurvature Weight (FloatConstraint): Weight of curve curvature for smoothing algorithm.
• DataLength Weight (FloatConstraint): Weight of curve length for smoothing algorithm.
• Data Parametrization (Enumeration): Parametrization type.
  • ChordLength (default): ...
  • Centripetal: ...
  • Uniform: ...
  • Curvilinear: ...
• DataTorsion Weight (FloatConstraint): Weight of curve torsion for smoothing algorithm.

Range

• DataFirst Index (Integer): Index of first point.
• DataLast Index (Integer): Index of last point (-1 to ignore).
• DataStart Offset (Integer): For closed curves, allows to choose the location of the join point.