Sketcher ConstrainSymmetric/cs: Difference between revisions

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


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{{GuiCommand/cs
{{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=[[Constraint Parallel/cs|Vazba rovnoběžnosti]]}}
|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>
</div>

==Description==


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<span id="Usage"></span>
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====Postup====
====Postup====
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See also: [[Sketcher_Workbench#Drawing_aids|Drawing aids]].
[[File:SymmetricConstraint1.png|256px]]


===[[Sketcher_Workbench#Continue_modes|Continue mode]]===
Select two points (vertexes) in the sketch and a line in the sketch. The selected points and the line will be dark green.


# Make sure there is no selection.
[[File:SymmetricConstraint2.png|256px]]
# There are several ways to invoke the tool:
#* Press the {{Button|[[Image:Sketcher_ConstrainSymmetric.svg|16px]] [[Sketcher_ConstrainSymmetric|Constrain symmetric]]}} button.
#* Select the {{MenuCommand|Sketch → Sketcher constraints → [[Image:Sketcher_ConstrainSymmetric.svg|16px]] Constrain symmetric}} option from the menu.
#* {{Version|1.0}}: Right-click in the [[3D_view|3D view]] and select the {{MenuCommand|Constrain → [[Image:Sketcher_ConstrainSymmetric.svg|16px]] Constrain symmetric}} option from the context menu.
#* Use the keyboard shortcut: {{KEY|S}}.
# The cursor changes to a cross with the tool icon.
# Do one of the following:
#* Select two points and a symmetry point (in that order).
#* Select two points and a symmetry line (idem).
#* Select a point, a symmetry line and another point (idem).
#* Select a line and a symmetry point (idem).
# A constraint is added.
# Optionally keep creating constraints.
# To finish, right-click or press {{KEY|Esc}}, or start another geometry or constraint creation tool.


===Run-once mode===
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.


# Do one of the following:
This will apply the constraint to the selected items.
#* Select two points and a symmetry point (in that order).
#* Select two points and a symmetry line (in any order).
#* Select a line and a symmetry point (idem).
# Invoke the tool as explained above, or with the following additional option:
#* {{Version|1.0}}: Right-click in the [[3D_view|3D view]] and select the {{MenuCommand|[[Image:Sketcher_ConstrainSymmetric.svg|16px]] Constrain symmetric}} option from the context menu.
# A constraint is added.


== Scripting ==
[[File:SymmetricConstraint3.png|256px]]


Two points and a symmetry line:
{{Emphasis|Note:}} 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.


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


Two points and a symmetry point:
{{Docnav|[[Sketcher_ConstrainEqual|Equal Length]]|[[Sketcher_ConstrainBlock|Constrain Block]]|[[Sketcher_Workbench|Sketcher]]|IconL=Constraint_EqualLength.png|IconC=Workbench_Sketcher.svg|IconR=Sketcher_ConstrainBlock.png}}


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

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

Revision as of 15:03, 23 April 2024

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.

See also: Drawing aids.

Continue mode

  1. Make sure there is no selection.
  2. There are several ways to invoke the tool:
    • Press the Constrain symmetric button.
    • Select the Sketch → Sketcher constraints → Constrain symmetric option from the menu.
    • introduced in version 1.0: Right-click in the 3D view and select the Constrain → Constrain symmetric option from the context menu.
    • Use the keyboard shortcut: S.
  3. The cursor changes to a cross with the tool icon.
  4. Do one of the following:
    • Select two points and a symmetry point (in that order).
    • Select two points and a symmetry line (idem).
    • Select a point, a symmetry line and another point (idem).
    • Select a line and a symmetry point (idem).
  5. A constraint is added.
  6. Optionally keep creating constraints.
  7. To finish, right-click or press Esc, or start another geometry or constraint creation tool.

Run-once mode

  1. Do one of the following:
    • Select two points and a symmetry point (in that order).
    • Select two points and a symmetry line (in any order).
    • Select a line and a symmetry point (idem).
  2. Invoke the tool as explained above, or with the following additional option:
  3. A constraint is added.

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.