Sketcher BSplineComb: Difference between revisions

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(Undo revision 1129069 by David69 (talk)"Or" options should not be numbered like this.)
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<languages/>
<languages/>
<translate>
<translate>

<!--T:10-->
<!--T:10-->
{{Docnav
{{Docnav
|[[Sketcher_BSplinePolygon|Show/Hide B-spline control polygon]]
|[[Sketcher_BSplinePolygon|Show/hide B-spline control polygon]]
|[[Sketcher_BSplineKnotMultiplicity|Show/Hide B-spline knot multiplicity]]
|[[Sketcher_BSplineKnotMultiplicity|Show/hide B-spline knot multiplicity]]
|[[Sketcher_Workbench|Sketcher]]
|[[Sketcher_Workbench|Sketcher]]
|IconL=Sketcher_BSplinePolygon.svg
|IconL=Sketcher_BSplinePolygon.svg
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{{GuiCommand
{{GuiCommand
|Name=Sketcher BSplineComb
|Name=Sketcher BSplineComb
|MenuLocation=Sketch → Sketcher B-spline tools → Show/Hide B-spline curvature comb
|MenuLocation=Sketch → Sketcher B-spline tools → Show/hide B-spline curvature comb
|Workbenches=[[Sketcher_Workbench|Sketcher]]
|Workbenches=[[Sketcher_Workbench|Sketcher]]
|Version=0.17
|Version=0.17
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Shows or hides the display of the Curvature Comb of a B-spline curve (see [https://en.wikipedia.org/wiki/B-spline B-spline]).
Shows or hides the display of the Curvature Comb of a B-spline (see [[B-Splines|this page]] for more info about B-splines).


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


==Usage== <!--T:5-->
==Usage== <!--T:19-->
# Within a pre-exisiting sketch, find and choose a B-spline who's Curvature Comb needs to be hidden or made visible.
# To invoke the command the [[Sketcher_BSplineComb|Sketcher BSplineComb]] do one of the following:
#* pressing the [[Image:Sketcher_BSplineComb.svg|24px]] icon in the Sketcher toolbar
#* invoking from the {{MenuCommand|Sketch → Sketcher B-spline tools → Show/Hide B-spline curvature comb}} in the Sketch dropdown menu.

==Options== <!--T:13-->


==Limitations== <!--T:14-->
<!--T:5-->
# 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 → [[File:Sketcher_BSplineComb.svg|16px]] Show/hide B-spline curvature comb}}.


==Scripting== <!--T:15-->


<!--T:8-->
<!--T:8-->
{{Docnav
{{Docnav
|[[Sketcher_BSplinePolygon|Show/Hide B-spline control polygon]]
|[[Sketcher_BSplinePolygon|Show/hide B-spline control polygon]]
|[[Sketcher_BSplineKnotMultiplicity|Show/Hide B-spline knot multiplicity]]
|[[Sketcher_BSplineKnotMultiplicity|Show/hide B-spline knot multiplicity]]
|[[Sketcher_Workbench|Sketcher]]
|[[Sketcher_Workbench|Sketcher]]
|IconL=Sketcher_BSplinePolygon.svg
|IconL=Sketcher_BSplinePolygon.svg
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</translate>
</translate>
{{Sketcher Tools navi{{#translation:}}}}
{{Sketcher_Tools_navi{{#translation:}}}}
{{Userdocnavi{{#translation:}}}}
{{Userdocnavi{{#translation:}}}}
{{clear}}

Revision as of 17:01, 14 April 2022

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 (see this page for more info about B-splines).

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.

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 Show/hide B-spline curvature comb or use the menu Sketch → Sketcher B-spline tools → Show/hide B-spline curvature comb.