Part Offset2D/fr



Part 2D Offset génère un profil parallèle au profil d'origine, à une distance définie de celui-ci. Il est également possible de d'agrandir/réduire une face plane de la même façon.

Le profil / la face doit être plan. il peux y avoir plusieurs profils dans un objet, sans être nécessairement coplanaire.

Utilisation

 * 1) sélectionner un objet a décaler
 * 2) cliquer sur la commande Part Offset2D
 * 3) définir la valeur de décalage dans le panneau des taches, puis valider.

Un objet 2D Offset paramétrique est crée. les object originaux sont basculés en mode de rendu filaire.

Propriétés

 * : liens vers la forme d'origine


 * Valeurs d'agrandissement de la face/profil. Si négatif la dimension de la face/profile est réduite.


 * ("Pipe" or "Skin"): Définie le traitement des profils non fermés. Si "Pipe" est selectionné, le profile est décaler comme une contour fermé extrêmement petit. Si "Skin" est sélectionné, un profil ouvert est créé.




 * ("Arc", "Tangent", "Intersection"): Défini le traitement des coin. avec "Arc", les segment décalés sont joint par des cercles, dont le centre est le sommet d'origine. "Tangent" n'est pas supporté pour OCC7.0.0. "Intersection": les segment sont agrandis jusqu'a ce qu'ils se croisent.




 * ("false", "true"): sets if multiple wires are treated collectively or independently. If "false", wires are offset independently, intersections between resulting wires are ignored. If "true", the wires are offset in collective manner.



Only wires within a compound are coupled. For example, if the structure is like compound(wire1, wire2, compound(wire3, wire4)), wire1 and wire2 will be treated collectively, but independently from wire3 and wire4. Likewise, wire3 and wire4 are treated collectively, but independently of wire1+wire2.

Also, in collective mode, directions of wires are important, and influence direction of offset. This is in tight relationship with how holes in faces are treated.

Wires being treated collectively must be coplanar. Wires being offset independently don't have to be coplanar.


 * ("false", "true"): if "true", the space between original wire/face and the offset is filled with a face.



Known issues

 * Using the tool can crash FreeCAD (see next point). On Windows, these crashes are converted to exceptions and don't generally cause FreeCAD to close; on other OS'es it is not the case. So, it is advised to save project before attempting to use the tool.


 * Enlarging faces with circular holes by an amount large enough to cause holes to close up, a crash occurs (OCC 7.0.0). The problem seems to be specific to circles; other shapes seem to close out properly.


 * when offsetting circles that have non-zero Placement, the result is placed wrongly. (OCC 7.0.0)


 * when offsetting circles, sometimes they are offset in unexpected direction (e.g. inward instead of outward). (OCC 7.0.0)


 * Fill="true" doesn't work when collectively offsetting open wires in "Skin" mode


 * "Tangent" join mode doesn't work (OCC 7.0.0)


 * Offsetting wires made of single line segment is not supported (because line segment doesn't define a plane). Single line segments cannot participate in collective offset either.

Scripting
The tool can by used in macros and from the python console by using the following function:

2D offset is also available as a method of Part.Shape. Example:

Version
The tool was introduced in FreeCAD v0.17.8350. Most of non-default modes will only work with OCC 7.0.0 or later.