Difference between revisions of "Sketcher BSplineComb"

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# Select a B-spline
 
# Select a B-spline
 
# Either use the toolbar button {{Button|[[File:Sketcher_BSplineComb.svg|16px]] [[Sketcher_BSplineComb|Show/hide B-spline curvature comb]]}} or use the menu {{MenuCommand|Sketch → Sketcher B-spline tools → Show/Hide B-spline curvature comb}}.
 
# Either use the toolbar button {{Button|[[File:Sketcher_BSplineComb.svg|16px]] [[Sketcher_BSplineComb|Show/hide B-spline curvature comb]]}} or use the menu {{MenuCommand|Sketch → Sketcher B-spline tools → Show/Hide B-spline curvature comb}}.
 
==Options== <!--T:13-->
 
 
==Limitations== <!--T:14-->
 
 
==Scripting== <!--T:15-->
 
  
 
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Revision as of 02:13, 8 March 2021

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Sketcher BSplineComb.svg Sketcher BSplineComb

Menu location
Sketch → Sketcher B-spline tools → Show/Hide B-spline curvature comb
Workbenches
Sketcher
Default shortcut
None
Introduced in version
0.17
See also
Sketcher Create B-spline

Description

Shows or hides the display of the Curvature Comb of a B-spline curve (see B-spline).

The curvature comb indicates the curvature (value of the second-order derivative) of the B-spline at every position. The higher the curvature at a position, the more is the the comb away from the curve. For positive curvatures ("turn to the right"), the comb is at the other side of the curve than for negative curvatures.

Sketcher BSplineCurvatureShow.png

B-spline with a saddle point at its mid position - the curvature comb there is zero.

Usage

  1. Select a B-spline
  2. Either use the toolbar button Sketcher BSplineComb.svg Show/hide B-spline curvature comb or use the menu Sketch → Sketcher B-spline tools → Show/Hide B-spline curvature comb.