Sketcher ConstrainPointOnObject

From FreeCAD Documentation
This page contains changes which are not marked for translation.
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 ConstrainPointOnObject

Menu location
Sketch → Sketcher constraints → Constrain point onto object
Workbenches
Sketcher
Default shortcut
O
Introduced in version
-
See also
Sketcher ConstrainCoincidentUnified, Sketcher ConstrainCoincident

Description

The Sketcher ConstrainPointOnObject tool fixes points on edges or axes. Lines are treated as infinite, and arcs are treated as full circles/ellipses.

introduced in version 0.22: This tool is replaced by the Sketcher ConstrainCoincidentUnified tool if the Unify Coincident and PointOnObject option is selected in the Sketcher Preferences.

Usage

See also: Drawing aids.

  1. Do one of the following (optional if the tool will run in continue mode):
    • Select a single point and a single edge (in any order).
    • Select several points and a single edge (idem).
    • Select a single point and several edges (idem).
  2. There are several ways to invoke the tool:
    • Press the Constrain point onto object button.
    • Select the Sketch → Sketcher constraints → Constrain point onto object option from the menu.
    • Use the keyboard shortcut: O.
  3. If the tool runs in continue mode:
    1. The cursor changes to a white cross with the tool icon.
    2. Optionally keep selecting elements. You can only select two elements at a time now.
    3. To finish, right-click or press Esc, or start a another constraints or geometries tool.

Scripting

The constraint can be created from macros and from the Python console by using the following command:

Sketch.addConstraint(Sketcher.Constraint('PointOnObject',LineMoving,PointOfLineMoving,LineFixed))

  • Sketch is a sketch object.
  • LineMoving is the number that designates the line, which contains the point that has to be moved onto the LineFixed (the line which is fixed).
  • PointOfLineMoving is the number of the vertex of line LineMoving, that has to be moved onto the LineFixed.
  • LinedFixed is the number of the line to be affixed onto the point PointOfLineMoving.

The Sketcher scripting page explains how to identify the numbers that designate lines and points.