Sketcher ConstrainSymmetric

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Equal Constraint
Block Constraint
Sketcher

Sketcher ConstrainSymmetric

Menu location
Sketch → Constraints → Symmetric Constraint
Workbenches
Sketcher
Default shortcut
S
Introduced in version
-
See also
None

Description

The Sketcher ConstrainSymmetric tool constrains two points to be symmetrical around a line or axis, or around a third point.

Usage

See also: Drawing aids.

Continue mode

  1. Make sure there is no selection.
  2. There are several ways to invoke the tool:
    • Press the Symmetric Constraint button.
    • Select the Sketch → Constraints → Symmetric Constraint option from the menu.
    • introduced in 1.0: Right-click in the 3D View and select the Constrain → Symmetric Constraint 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 described above, or with one of the following additional options:
    • introduced in 1.0: Right-click in the 3D View and select the Symmetric Constraint option from the context menu.
    • Right-click in the Elements section of the Sketcher Dialog and select the Symmetric Constraint option from the context menu.
  3. A constraint is added.

Notes

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.


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