Geometria solida costruttiva

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Introduzione

Geometria solida costruttiva (CSG) è un paradigma di modellazione che viene utilizzato in molti sistemi CAD tradizionali. Essenzialmente consiste nell'usare oggetti solidi primitivi e fare operazioni booleane con essi, come fusione, sottrazione e intersezione, al fine di creare una forma finale.

In FreeCAD, this method is mostly utilized with the Part Workbench, which has the ability of creating primitive objects like boxes, cylinders, and spheres and fuse them together, or use them to cut other objects with tools like Part Cut. A PartDesign Body created with the PartDesign Workbench can also be used in a boolean operation with other objects.

Constructive solid geometry (CSG) workflow; any number of operations can be done on solid primitives to create other solid objects, and then fuse or cut them until the final shape is produced.

The PartDesign Workbench uses a more modern approach than simple CSG; this method is called feature editing, which means creating a base solid, and then adding sequential parametric transformations to obtain a final body.

Esempio

Example of constructive solid geometry (CSG) workflow: primitive parts are fused (union); the intersection of two other primitive parts is calculated (common); the difference (cut) of the two previous shapes is obtained.

Tutorial

The tutorials page provides some examples on creating solids with the Part Workbench that use the CSG method.