Sketcher ConstrainCoincident/es: Difference between revisions

From FreeCAD Documentation
(Updating to match new version of source page)
(Updating to match new version of source page)
Line 1: Line 1:
<languages/>
<languages/>
{{Docnav|[[Sketcher_ToggleConstruction|Construction Mode]]|[[Sketcher ConstrainPointOnObject|Point On Object]]|[[Sketcher_Workbench|Sketcher]]|IconL=Sketcher_ToggleConstruction.png|IconC=Workbench_Sketcher.svg|IconR=Constraint_PointOnObject.png}}

{{GuiCommand/es
{{GuiCommand/es
|Icon=Constraint PointOnPoint.svg
|Icon=Constraint PointOnPoint.svg
Line 86: Line 88:
[[Category:Sketcher/es]]
[[Category:Sketcher/es]]
</div>
</div>

{{clear}}
{{clear}}

Revision as of 10:06, 11 March 2019

Restricción de coincidencia

Ubicación en el Menú
Sketch → Restricciones de croquis → Restricción de coincidencia
Entornos de trabajo
Sketcher
Atajo de teclado por defecto
C
Introducido en versión
-
Ver también
Restricción de bloqueo, Punto en objeto

"Crea una restricción de coincidencia en los objetos seleccionados"

Descripción

Esta restricción permite hacer dos puntos coincidentes.

This constraint tool takes two points as its argument and serves to make the two points coincident. (Meaning to make them as-one-point).

In practical terms this constraint tool is useful when there is a break in a profile for example - where two lines end near each other and need to be joined - a coincident constraint on their end-points will close the gap.

Utilización

  1. Selecciona dos puntos.
  2. Selecciona la restricción 'Coincidencia' y los dos puntos pasarán a ser coincidentes.

NOTE: In order to make two points coincident, FreeCAD must necessarily move one, or both, of the original points.

Scripting

General scripting

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

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

where :

  • Sketch is a sketch object
  • LineFixed is the number of the line, that will not move by applying the constraint
  • PointOfLineFixed is the number of the vertex of the line LineFixed that has to fulfilled the constraint
  • LineMoving is the number of the line, that will move by applying the constraint
  • PointOfLineMoving is the number of the line LineMoving, that has to fulfilled the constraint

The main issue by using this function is to identify correctly the line number and the vertex number of the lines you want to process.

The next paragraph will explain you how to identify the numbering of a line and of a vertex of a line.

Identifying the numbering of a line

I have drawn three lines as shown in the following figure.

By moving the cursor of the mouse above the line you can see the line number at the bottom left of the FreeCAD windows, see next figure.

Unfortunately the numbering displayed on the FreeCAD windows start from 1 whereas the numbering of the line used to script start from 0: this means that you have to retrieve one each time you want to refer to a line.

Identifying the numbering of the vertices of a line

The vertices of one line can only have the value 1 or 2. (Don’t ask me, why the vertices numbering does not start from 0 …) The vertices are numbered according to their order of creation. To find out the order of their creation (If you have a lot of lines, you cannot remember which vertex you have created first), you just have to move the cursor of your mouse above the two vertices of one line, see following figure.

If you read e.g. 4 and 5, it means that the vertex 4 will be referenced by using the number 1 in the script command and the vertex 5 will be referenced by using the number 2 in the script command. Etc.

Example

Let us take the previous example of the three lines. The subsequent figure indicates the numbering of each line and their vertices according to the convention for scripting.

blue text = numbering of line, black text = numbering of vertices

The command

Sketch.addConstraint(Sketcher.Constraint('Coincident',1,2,2,1))

yields following result:

The command

Sketch.addConstraint(Sketcher.Constraint('Coincident',0,2,2,2))

yields following result: