Sketcher "Ограничение симметричности"

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This page is a translated version of the page Sketcher ConstrainSymmetric and the translation is 21% complete.
Outdated translations are marked like this.

Ограничение симметричности

Системное название
Sketcher_ConstrainSymmetric
Расположение в меню
Sketch → Ограничения эскиза → Ограничение симметричности
Верстаки
Sketcher
Быстрые клавиши
S
Представлено в версии
-
См. также
Ограничение параллельности

Описание

Ограничение симметричности требует от двух выделенных точек быть симметричными относительно данной линии, то есть от обеих точек требуется лежать на нормали к линии через обе точки на одинаковом расстоянии от линии. Альтернативно, она может наложить ограничение на две точки быть симметричными относительно третьей.

Применение

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.

Notes

  • The arrows of this constraint show the color of the dimensional constraints.

Программирование

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.