Mesh to Part/de

Konvertieren von Bauteilobjekten in Netze
Die Konvertierung von übergeordneten Objekten wie Teilformen in einfachere Objekte wie Netze ist eine ziemlich einfache Operation, bei der alle Flächen eines Teilobjekts trianguliert werden. Das Ergebnis dieser Triangulation (Tesselierung) wird dann zum Aufbau eines Netzes verwendet: (nehmen wir an, unser Dokument enthält ein Teilobjekt)

Manchmal ist die Triangulation bestimmter Flächen, die OpenCascade anbietet, ziemlich hässlich. Wenn die Fläche einen rechteckigen Parameterraum hat und keine Löcher oder andere Beschnittkurven enthält, kannst Du auch selbst ein Netz erstellen:

Converting Meshes to Part objects
Converting Meshes to Part objects is an extremely important operation in CAD work, because very often you receive 3D data in mesh format from other people or outputted from other applications. Meshes are very practical to represent free-form geometry and big visual scenes, as it is very lightweight, but for CAD we generally prefer higher-level objects that carry much more information, such as the idea of solid, or faces made of curves instead of triangles.

Converting meshes to those higher-level objects (handled by the Part Module in FreeCAD) is not an easy operation. Meshes can be made of thousands of triangles (for example when generated by a 3D scanner), and having solids made of the same number of faces would be extremely heavy to manipulate. So you generally want to optimize the object when converting.

FreeCAD currently offers two methods to convert Meshes to Part objects. The first method is a simple, direct conversion, without any optimization:

The second method offers the possibility to consider mesh facets coplanar when the angle between them is under a certain value. This allows to build much simpler shapes: (let's assume our document contains one Mesh object)