Sketcher ConstrainSymmetric/cs: Difference between revisions

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<languages/>
{{GuiCommand|Name=Constraint Symmetric|Workbenches=[[Sketcher Workbench|Náčrt]], [[PartDesign Workbench|Návrh dílu]]|MenuLocation=Sketch → Sketcher constraints → Constrain symmetrical|SeeAlso=[[Constraint Parallel|Vazba rovnoběžnosti]]}}


{{Docnav
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====Description====
|[[Sketcher_ConstrainEqual|Equal]]
The symmetrical constraint constrains two selected points to be symmetrical around a given line, i.e., both selected points are constrained to lie on a normal to the line through both points and are constrained to be equidistant from the line. Alternatively it can constrain two points to be symmetric with respect to a third one.
|[[Sketcher_ConstrainBlock|Block]]
|[[Sketcher_Workbench|Sketcher]]
|IconL=Sketcher_ConstrainEqual.svg
|IconR=Sketcher_ConstrainBlock.svg
|IconC=Workbench_Sketcher.svg
}}


<div class="mw-translate-fuzzy">
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====Operation====
{{GuiCommand/cs
|Name=Constraint Symmetric
|Name/cs=Constraint Symmetric
|Workbenches=[[Sketcher Workbench/cs|Náčrt]], [[PartDesign Workbench/cs|Návrh dílu]]
|MenuLocation=Sketch → Sketcher constraints → Constrain symmetrical
|SeeAlso=[[Sketcher_ConstrainParallel/cs|Vazba rovnoběžnosti]]
}}
</div>

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==Description==

<div class="mw-translate-fuzzy">
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====Popis====
Vazba souměrnosti zajistí, že dva vybrané body jsou souměrné podle zadané přímky, např. oba vybrané body budou ležet na kolmici k přímce procházející oběma body a budou stejně vzdálené od přímky. Případně oba body mohou být souměrně uloženy ke třetímu bodu.
</div>

<div class="mw-translate-fuzzy">
====Postup====
[[File:SymmetricConstraint1.png|256px]]<br /><br />
[[File:SymmetricConstraint1.png|256px]]<br /><br />
Vyberte v náčrtu dva body (vrcholy) a přímku. Vybrané body a přímka změní barvu na tmavězelenou.<br /><br />
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Select two points (vertexes) in the sketch and a line in the sketch. The selected points and the line will be dark green.<br /><br />
[[File:SymmetricConstraint2.png|256px]]<br /><br />
[[File:SymmetricConstraint2.png|256px]]<br /><br />
Click on the SymmetricalConstraint icon [[File:Constraint_Symmetric.png|16px]] in the Sketcher toolbar or select the Constrain Symmetrical menu item from the Sketcher Constraints sub menu of the Sketcher (or Part Design) menu item.
Klikněte na ikonu Vazba souměrnosti [[File:Constraint_Symmetric.png|16px]] v nástrojovém pruhu Náčrtu nebo vyberte položku Vazba souměrnosti ze submenu Vazba souměrnosti z menu Náčrtu (nebo Návrh dílu).
This will apply the constraint to the selected items.<br /><br />
Tím aplikujete vazbu na vybrané položky.<br /><br />
[[File:SymmetricConstraint3.png|256px]]<br /><br />
[[File:SymmetricConstraint3.png|256px]]<br /><br />
Toto je geometrické vazba a nemá žádné parametry.
This is a geometric constraint and has no editable parameters.
</div>


[[File:SymmetricConstraint1.png|500px]]
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<languages/>

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Select two points (vertexes) in the sketch and a line in the sketch. The selected points and the line will be dark green.

[[File:SymmetricConstraint2.png|500px]]

Click on {{Button|[[File:Sketcher_ConstrainSymmetric.svg|16px]] [[Sketcher_ConstrainSymmetric|Constrain symmetric]]}} or select the Constrain Symmetrical menu item from the Sketcher Constraints sub menu of the Sketcher (or Part Design) menu item.

This will apply the constraint to the selected items.

[[File:SymmetricConstraint3.png|500px]]

{{Emphasis|Note:}} Before Version 0.19 (see fix [https://github.com/FreeCAD/FreeCAD/pull/3746]), if you want to define a symmetry constraint with respect to a point, the order of the selection is important, depending on if you select the tool at the beginning or at the end.
* If you click the tool first: select the first point, then the symmetry reference point, and finally the second point.
* If you click the tool last: select the first point, then the second point, and finally the symmetry reference point.

See the tracker [https://freecadweb.org/tracker/view.php?id=4144 issue #4144], and [https://forum.freecadweb.org/viewtopic.php?f=3&t=39611 forum thread].

== Scripting ==

Two points and a symmetry line:

{{Code|code=Sketch.addConstraint(Sketcher.Constraint('Symmetric', Line1, PointOfLine1, Line2, PointOfLine2, SymmetryLine))}}

Two points and a symmetry point:

{{Code|code=Sketch.addConstraint(Sketcher.Constraint('Symmetric', Line1, PointOfLine1, Line2, PointOfLine2, LineS, PointOfLineS))}}

A line and a symmetry point (In the GUI one can select a line and a point, but it uses internally the same form as above, with the two extremities of the same line):

{{Code|code=Sketch.addConstraint(Sketcher.Constraint('Symmetric', Line, 1, Line, 2, LineS, PointOfLineS))}}

The [[Sketcher_scripting|Sketcher scripting]] page explains the values which can be used for {{incode|Line1}}, {{incode|Line2}}, {{incode|LineS}}, {{incode|Line}}, {{incode|PointOfLine1}}, {{incode|PointOfLine2}} and {{incode|PointOfLineS}}, and contains further examples on how to create constraints from Python scripts.


{{Docnav
|[[Sketcher_ConstrainEqual|Equal]]
|[[Sketcher_ConstrainBlock|Block]]
|[[Sketcher_Workbench|Sketcher]]
|IconL=Sketcher_ConstrainEqual.svg
|IconR=Sketcher_ConstrainBlock.svg
|IconC=Workbench_Sketcher.svg
}}

{{Sketcher_Tools_navi{{#translation:}}}}
{{Userdocnavi{{#translation:}}}}

Revision as of 18:13, 20 March 2022

Other languages:

Constraint Symmetric

Umístění Menu
Sketch → Sketcher constraints → Constrain symmetrical
Pracovní stoly
Náčrt, Návrh dílu
Výchozí zástupce
Nikdo
Představen ve verzi
-
Viz také
Vazba rovnoběžnosti

Description

Popis

Vazba souměrnosti zajistí, že dva vybrané body jsou souměrné podle zadané přímky, např. oba vybrané body budou ležet na kolmici k přímce procházející oběma body a budou stejně vzdálené od přímky. Případně oba body mohou být souměrně uloženy ke třetímu bodu.

Postup



Vyberte v náčrtu dva body (vrcholy) a přímku. Vybrané body a přímka změní barvu na tmavězelenou.



Klikněte na ikonu Vazba souměrnosti v nástrojovém pruhu Náčrtu nebo vyberte položku Vazba souměrnosti ze submenu Vazba souměrnosti z menu Náčrtu (nebo Návrh dílu). Tím aplikujete vazbu na vybrané položky.



Toto je geometrické vazba a nemá žádné parametry.

Select two points (vertexes) in the sketch and a line in the sketch. The selected points and the line will be dark green.

Click on Constrain symmetric or select the Constrain Symmetrical menu item from the Sketcher Constraints sub menu of the Sketcher (or Part Design) menu item.

This will apply the constraint to the selected items.

Note: Before Version 0.19 (see fix [1]), if you want to define a symmetry constraint with respect to a point, the order of the selection is important, depending on if you select the tool at the beginning or at the end.

  • If you click the tool first: select the first point, then the symmetry reference point, and finally the second point.
  • If you click the tool last: select the first point, then the second point, and finally the symmetry reference point.

See the tracker issue #4144, and forum thread.

Scripting

Two points and a symmetry line: 

Sketch.addConstraint(Sketcher.Constraint('Symmetric', Line1, PointOfLine1, Line2, PointOfLine2, SymmetryLine))

Two points and a symmetry point: 

Sketch.addConstraint(Sketcher.Constraint('Symmetric', Line1, PointOfLine1, Line2, PointOfLine2, LineS, PointOfLineS))

A line and a symmetry point (In the GUI one can select a line and a point, but it uses internally the same form as above, with the two extremities of the same line): 

Sketch.addConstraint(Sketcher.Constraint('Symmetric', Line, 1, Line, 2, LineS, PointOfLineS))

The Sketcher scripting page explains the values which can be used for Line1, Line2, LineS, Line, PointOfLine1, PointOfLine2 and PointOfLineS, and contains further examples on how to create constraints from Python scripts.


Sketcher
User documentation
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