Sketcher ConstrainDistance: Difference between revisions
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The [[Image:Sketcher_ConstrainDistance.svg|24px]] [[Sketcher_ConstrainDistance|Sketcher ConstrainDistance]] tool |
The [[Image:Sketcher_ConstrainDistance.svg|24px]] [[Sketcher_ConstrainDistance|Sketcher ConstrainDistance]] tool fixes the length of a line, the distance between two points, the perpendicular distance between a point and a line; or, {{Version|0.21}}, the distance between the edges of two circles or arcs, or between the edge of a circle or arc and a line; or, {{Version|1.0}}, the length of an arc. |
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fixes the length of a line, the distance between two points, the perpendicular distance between a point and a line; or, {{Version|0.21}}, the distance between the edges of two circles or arcs, or between the edge of a circle or arc and a line; or, {{Version|1.0}}, the length of an arc. |
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Latest revision as of 16:42, 29 April 2024
Sketcher ConstrainDistance |
Menu location |
---|
Sketch → Sketcher constraints → Constrain distance |
Workbenches |
Sketcher |
Default shortcut |
K D |
Introduced in version |
- |
See also |
Sketcher ConstrainDistanceX, Sketcher ConstrainDistanceY |
Description
The Sketcher ConstrainDistance tool fixes the length of a line, the distance between two points, the perpendicular distance between a point and a line; or, introduced in version 0.21, the distance between the edges of two circles or arcs, or between the edge of a circle or arc and a line; or, introduced in version 1.0, the length of an arc.
Usage
See also: Drawing aids.
Continue mode
- Make sure there is no selection.
- There are several ways to invoke the tool:
- introduced in version 1.0: If the Dimensioning constraints preference is set to
Single tool
(default): press the down arrow to the right of the button and select the Constrain distance option from the dropdown. - If this preference has a different value (and in version 0.21 and below): press the Constrain distance button.
- Select the Sketch → Sketcher constraints → Constrain distance option from the menu.
- introduced in version 1.0: Right-click in the 3D view and select the Dimension → Constrain distance option from the context menu.
- Use the keyboard shortcut K then D.
- introduced in version 1.0: If the Dimensioning constraints preference is set to
- The cursor changes to a cross with the tool icon.
- Do one of the following:
- Select a single line.
- Select two points.
- Select a point and a line (in that order).
- If a driving dimensional constraint is created, depending on the preferences, a dialog opens to edit its value.
- A constraint is added.
- Optionally keep creating constraints.
- To finish, right-click or press Esc, or start another geometry or constraint creation tool
Run-once mode
- Do one of the following:
- Select a single line.
- Select two points.
- Select a point and a line (in any order).
- Select the edges of two circles or arcs.
- Select the edge of a circle or arc and a line (idem).
- introduced in version 1.0: Select the edge of a single arc.
- Invoke the tool as explained above.
- Optionally edit the constraint value.
- A constraint is added.
Notes
- If applicable please consider using Horizontal distance or Vertical distance constraints instead. They are more efficient.
Scripting
Distance from origin:
Sketch.addConstraint(Sketcher.Constraint('Distance', Edge, PointOfEdge, -1, 1, App.Units.Quantity('123.0 mm')))
Distance between two vertices:
Sketch.addConstraint(Sketcher.Constraint('Distance', Edge1, PointOfEdge1, Edge2, PointOfEdge2, App.Units.Quantity('123.0 mm')))
Length of line (the GUI allows selecting the edge itself, but it is just a shorthand for using the two extremities of the same line):
Sketch.addConstraint(Sketcher.Constraint('Distance', Line, 1, Line, 2, App.Units.Quantity('123.0 mm')))
Distance from point (Edge, PointOfEdge
) to perpendicular point on line (Line
):
Sketch.addConstraint(Sketcher.Constraint('Distance', Edge, PointOfEdge, Line, 0, App.Units.Quantity('123.0 mm')))
Distance between the edges of two circles:
Sketch.addConstraint(Sketcher.Constraint('Distance', Circle1, 0, Circle2, 0, App.Units.Quantity('123.0 mm')))
The Sketcher scripting page explains the values which can be used for Edge
, Edge1
, Edge2
, PointOfEdge
, PointOfEdge1
, PointOfEdge2
, Line
, Circle1
and Circle2
, and contains further examples on how to create constraints from Python scripts.
- 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
- Getting started
- Installation: Download, Windows, Linux, Mac, Additional components, Docker, AppImage, Ubuntu Snap
- Basics: About FreeCAD, Interface, Mouse navigation, Selection methods, Object name, Preferences, Workbenches, Document structure, Properties, Help FreeCAD, Donate
- Help: Tutorials, Video tutorials
- Workbenches: Std Base, Assembly, BIM, CAM, Draft, FEM, Inspection, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Surface, TechDraw, Test Framework
- Hubs: User hub, Power users hub, Developer hub