Géométrie de construction de solides

Other languages:

Introduction

La géométrie solide constructive (CSG) est un paradigme de modélisation utilisé dans de nombreux systèmes de CAO traditionnels. Cela consiste essentiellement à utiliser des objets solides primitifs et à effectuer des opérations booléennes, telles que la fusion, la soustraction et l'intersection, afin de créer une forme 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.

Example

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.