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|
|
| 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.
Unlike the Curves Interpolate tool, which aims to generate a curve passing through all points, it aims to create a smoother curve by passing within a specified approximation distance of the points.
Usage
- Select one or more objects that contain at least two vertices each.
- There are several ways to invoke the tool:
- Press the Approximate button.
- Select the Curves → Approximate option from the menu.
- Press the
- An Approximation_Curve object is created for each selected object.
- 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.
This page is retrieved from https://wiki.freecad.org/Curves_Approximate