Sketcher B-SplineDurchInterpolationErstellen
Sketcher CreateBSplineByInterpolation |
Menu location |
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Sketch → Sketcher geometries → Interpolate B-spline |
Workbenches |
Sketcher |
Default shortcut |
G B I |
Introduced in version |
0.21 |
See also |
Sketcher Periodic B-spline |
Beschreibung
This tool creates a B-spline curve passing through given points. See this page for more info about B-splines.
Usage
- Press the B-spline by knots button.
- Create a series of points by clicking in the 3D view. While the command is active, the created points are connected with straight lines.
- Optionally press M before terminating the input to define the multiplicity of the knot at the last defined point (note that this may not always be respected, see limitations for details).
- Optionally press Backspace before terminating the input to delete the last created control point.
- Right-click to terminate the input and generate the curve.
- Depending on preferences, the tool may remain active to trace a new curve. Right-click again to exit the command.
Notes
Limitations
- The resultant curve is no different than a (non-uniform) B-spline defined through control points. So all related limitations apply. See Sketcher CreateBSpline.
- The B-splines created are always cubic (i.e. with degree 3).
- The defined multiplicity may not always be respected:
- For a periodic spline, the first knot (coincident with last) always has a multiplicity of 2.
- For a non-periodic spline, the first and last knots always have a multiplicity of 4.
- If the points just before and just after have multiplicities >=3, the piece between these two is fully continuous, and this (middle) point will only be constrained with point-on-object. If a knot is needed, consider using the insert knot tool.
Sketcher
(FIXME)
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- Skizzenbeschränkungen
- Geometrische Beschränkungen Koinzidenz erzwingen, Punkt auf Objekt festlegen, Vertikal, Horizontal, Parallel, Orthogonal, Tangente, Gleichheit, Symmetrisch, Constrain Block
- Dimensional constraints Sperren, Horizontaler Abstand, Vertikaler Abstand, Distanz festlegen, Radius festlegen, Winkel festlegen, Snell's Law, Umschalten auf steuernde Bemaßung,
- Sketcher tools Select solver DOFs, Close Shape, Connect Edges, Select Constraints, Select Origin, Select Vertical Axis, Select Horizontal Axis, Select Redundant Constraints, Select Conflicting Constraints, Select Elements Associated with constraints, Show/Hide internal geometry, Symmetry, Clone, Copy, Move, Rectangular Array, Delete All Geometry, Delete All Constraints
- Sketcher B-spline tools Show/Hide B-spline degree, Show/Hide B-spline control polygon, Show/Hide B-spline curvature comb, Show/Hide B-spline knot multiplicity, Convert Geometry to B-spline, Increase degree, Increase knot multiplicity, Decrease knot multiplicity
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