Sketcher BSplineComb: Difference between revisions

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The [[Image:Sketcher_BSplineComb.svg|24px]] [[Sketcher_BSplineComb|Sketcher BSplineComb]] tool shows or hides the B-spline curvature comb in all sketches. See [[B-Splines|this page]] for more information about B-splines.
The [[Image:Sketcher_BSplineComb.svg|24px]] [[Sketcher_BSplineComb|Sketcher BSplineComb]] tool shows or hides the [[B-Splines|B-spline]] curvature comb in all sketches.


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The curvature comb indicates the curvature (value of the second-order derivative) of a B-spline. The higher the curvature, the longer its teeth are at that position. Where a B-spline curves to the right the comb is on its left side and vice versa.
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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{{Caption|B-spline with a saddle point at its middle, the curvature comb is zero there.}}
{{Caption|B-spline with a saddle point at its midpoint, the curvature comb is zero there.}}


==Usage== <!--T:19-->
==Usage== <!--T:19-->

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.