Sketcher BSplineComb: Difference between revisions

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<!--T:10-->
{{Docnav
|[[Sketcher_BSplinePolygon|Show/hide B-spline control polygon]]
|[[Sketcher_BSplineKnotMultiplicity|Show/hide B-spline knot multiplicity]]
|[[Sketcher_Workbench|Sketcher]]
|IconL=Sketcher_BSplinePolygon.svg
|IconR=Sketcher_BSplineKnotMultiplicity.svg
|IconC=Workbench_Sketcher.svg
}}

<!--T:1-->
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{{GuiCommand
{{GuiCommand
|Name=Sketcher BSplineComb
|Name=Sketcher BSplineComb
|MenuLocation=Sketch → Sketcher visual → Show/hide B-spline information layerShow/hide B-spline curvature comb
|Workbenches=[[Sketcher Workbench|Sketcher]]
|Workbenches=[[Sketcher_Workbench|Sketcher]]
|MenuLocation=Sketch → Sketcher B-spline toolsshow/hide B-spline Curvature Comb
|Version=0.17
|Version=0.17
|SeeAlso=[[Sketcher CompCreateBSpline|Create B-spline]]
|SeeAlso=[[Sketcher_CreateBSpline|Sketcher CreateBSpline]]
}}
}}


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<!--T:9-->
The [[Image:Sketcher_BSplineComb.svg|24px]] [[Sketcher_BSplineComb|Sketcher BSplineComb]] tool shows or hides the [[B-Splines|B-spline]] curvature comb in all sketches.
Shows or hides the display of the Curvature Comb of a B-spline curve (see [https://en.wikipedia.org/wiki/B-spline B-spline]).

<!--T:16-->
The curvature comb indicates the curvature (value of the second-order derivative) along a B-spline. The higher the curvature, the longer the comb's teeth are. Where a B-spline curves to the right the comb is on its left side and vice versa.


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[[File:sketcher_BSplineCurvatureShow.png]] '''<-->''' [[File:sketcher_BSplineCurvatureHide.png]]
[[File:sketcher_BSplineCurvatureShow.png]]
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{{Caption|B-spline with a saddle point at its midpoint, the curvature comb is zero there.}}


==How to use== <!--T:5-->
==Usage== <!--T:19-->

# Select a B-spline and apply.
<!--T:5-->
# There are several ways to invoke the tool:
#* Press the {{Button|[[Image:Sketcher_BSplineComb.svg|16px]] [[Sketcher_BSplineComb|Show/hide B-spline curvature comb]]}} button.
#* Select the {{MenuCommand|Sketch → Sketcher visual → Show/hide B-spline information layer → [[Image:Sketcher_BSplineComb.svg|16px]] Show/hide B-spline curvature comb}} option from the menu.




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<!--T:8-->
{{Docnav
[[Category:Sketcher]]
|[[Sketcher_BSplinePolygon|Show/hide B-spline control polygon]]
|[[Sketcher_BSplineKnotMultiplicity|Show/hide B-spline knot multiplicity]]
|[[Sketcher_Workbench|Sketcher]]
|IconL=Sketcher_BSplinePolygon.svg
|IconR=Sketcher_BSplineKnotMultiplicity.svg
|IconC=Workbench_Sketcher.svg
}}

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</translate>
{{Sketcher_Tools_navi{{#translation:}}}}
{{clear}}
{{Userdocnavi{{#translation:}}}}

Latest revision as of 08:56, 23 April 2024

Sketcher BSplineComb

Menu location
Sketch → Sketcher visual → Show/hide B-spline information layer → Show/hide B-spline curvature comb
Workbenches
Sketcher
Default shortcut
None
Introduced in version
0.17
See also
Sketcher CreateBSpline

Description

The Sketcher BSplineComb tool shows or hides the B-spline curvature comb in all sketches.

The curvature comb indicates the curvature (value of the second-order derivative) along a B-spline. The higher the curvature, the longer the comb's teeth are. Where a B-spline curves to the right the comb is on its left side and vice versa.

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

Usage

  1. There are several ways to invoke the tool:
    • Press the Show/hide B-spline curvature comb button.
    • Select the Sketch → Sketcher visual → Show/hide B-spline information layer → Show/hide B-spline curvature comb option from the menu.