Sketcher ConstrainSymmetric: Difference between revisions
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The [[Image:Sketcher_ConstrainSymmetric.svg|24px]] [[Sketcher_ConstrainSymmetric|Sketcher ConstrainSymmetric]] |
The [[Image:Sketcher_ConstrainSymmetric.svg|24px]] [[Sketcher_ConstrainSymmetric|Sketcher ConstrainSymmetric]] tool constrains two points to be symmetrical around a line or around a third point. |
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==Usage== <!--T:3--> |
==Usage== <!--T:3--> |
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See also: [[Sketcher_Workbench#Drawing_aids|Drawing aids]]. |
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[[File:SymmetricConstraint1.png|500px]] |
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# Do one of the following (optional if the tool will run in [[Sketcher_Workbench#Continue_modes|continue mode]]): |
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Select two points |
#* Select two points and a symmetry point (in that order). |
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#* Select two points and a symmetry line (in any order). |
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#* Select a line and a symmetry point (idem). |
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[[File:SymmetricConstraint2.png|500px]] |
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# If the tool runs in [[Sketcher_Workbench#Continue_modes|continue mode]]: |
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## The cursor changes to a white cross with the tool icon. |
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## Optionally keep selecting elements: |
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##* Select two points and a symmetry point (in that order). |
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##* Select two points and a symmetry line (idem). |
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##* Select a point, a symmetry line and another point (idem). |
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This will apply the constraint to the selected items. |
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##* Select a line and a symmetry point (idem). |
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## To finish, right-click or press {{KEY|Esc}}, or start a another constraints or geometries tool. |
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[[File:SymmetricConstraint3.png|500px]] |
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{{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. |
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* If you click the tool first: select the first point, then the symmetry reference point, and finally the second point. |
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* If you click the tool last: select the first point, then the second point, and finally the symmetry reference point. |
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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]. |
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== Scripting == <!--T:18--> |
== Scripting == <!--T:18--> |
Revision as of 15:41, 1 March 2024
This documentation is a work in progress. Please don't mark it as translatable since it will change in the next hours and days.
Sketcher ConstrainSymmetric |
Menu location |
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Sketch → Sketcher constraints → Constrain symmetrical |
Workbenches |
Sketcher |
Default shortcut |
S |
Introduced in version |
- |
See also |
Sketcher Constraint Parallel |
Description
The Sketcher ConstrainSymmetric tool constrains two points to be symmetrical around a line or around a third point.
Usage
See also: Drawing aids.
- Do one of the following (optional if the tool will run in continue mode):
- 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).
- There are several ways to invoke the tool:
- Press the Constrain symmetrical button.
- Select the Sketch → Sketcher constraints → Constrain symmetrical option from the menu.
- introduced in version 0.22: Right-click in the 3D view and select the Constrain → Constrain symmetrical option from the context menu.
- Use the keyboard shortcut: S.
- If the tool runs in continue mode:
- The cursor changes to a white cross with the tool icon.
- Optionally keep selecting elements:
- 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).
- To finish, right-click or press Esc, or start a another constraints or geometries tool.
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
- General: Create sketch, Edit sketch, Map sketch to face, Reorient sketch, Validate sketch, Merge sketches, Mirror sketch, Leave sketch, View sketch, View section, Toggle grid, Toggle snap, Configure rendering order, Stop operation
- Sketcher geometries: Point, Line, Arc, Arc by 3 points, Circle, Circle by 3 points, Ellipse, Ellipse by 3 points, Arc of ellipse, Arc of hyperbola, Arc of parabola, B-spline by control points, Periodic B-spline by control points, B-spline by knots, Periodic B-spline by knots, Polyline, Rectangle, Centered rectangle, Rounded rectangle, Triangle, Square, Pentagon, Hexagon, Heptagon, Octagon, Regular polygon, Slot, Fillet, Corner-preserving fillet, Trim, Extend, Split, External geometry, Carbon copy, Toggle construction geometry
- Sketcher constraints:
- Geometric constraints: Coincident, Point on object, Vertical, Horizontal, Parallel, Perpendicular, Tangent, Equal, Symmetric, Block
- Dimensional constraints: Lock, Horizontal distance, Vertical distance, Distance, Radius or weight, Diameter, Auto radius/diameter, Angle, Refraction (Snell's law)
- Constraint tools: Toggle driving/reference constraint, Activate/deactivate constraint
- Sketcher tools: Select unconstrained DoF, Select associated constraints, Select associated geometry, Select redundant constraints, Select conflicting constraints, Show/hide internal geometry, Select origin, Select horizontal axis, Select vertical axis, Symmetry, Clone, Copy, Move, Rectangular array, Remove axes alignment, Delete all geometry, Delete all constraints
- Sketcher B-spline tools: Show/hide B-spline degree, Show/hide B-spline control polygon, Show/hide B-spline curvature comb, Show/hide B-spline knot multiplicity, Show/hide B-spline control point weight, Convert geometry to B-spline, Increase B-spline degree, Decrease B-spline degree, Increase knot multiplicity, Decrease knot multiplicity, Insert knot, Join curves
- Sketcher virtual space: Switch virtual space
- Additional: Sketcher Dialog, Preferences, Sketcher scripting
User documentation
- Getting started
- Installation: Download, Windows, Linux, Mac, Additional components, Docker, AppImage, Ubuntu Snap
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