Constructive solid geometry/fr

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.

Dans FreeCAD, cette méthode est principalement utilisée avec l'atelier Part, qui permet de créer des objets primitifs tels que des boîtes, des cylindres, des sphères, et de les fusionner, ou de les utiliser pour couper d'autres objets avec des outils tels que Part Soustraction. Un corps PartDesign créé avec l'atelier PartDesign peut également être utilisé dans une opération booléenne avec d'autres objets.

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.

Tutorials

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

• Traditional modeling, the CSG way
• Wiffle ball tutorial
• Basic modeling tutorial

Part

• Primitives: Box, Cylinder, Sphere, Cone, Torus, Tube, Create primitives, Shape builder

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• Creation and modification: Extrude, Revolve, Mirror, Fillet, Chamfer, Make face from wires, Ruled Surface, Loft, Sweep, Section, Cross sections, 3D Offset, 2D Offset, Thickness, Projection on surface, Attachment

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• Boolean: Make compound, Explode Compound, Compound Filter, Boolean, Cut, Fuse, Common, Connect, Embed, Cutout, Boolean fragments, Slice apart, Slice, XOR

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• Measure: Measure Linear, Measure Angular, Measure Refresh, Clear All, Toggle All, Toggle 3D, Toggle Delta

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• Other tools: Import, Export, Box selection, Shape from Mesh, Points from mesh, Convert to solid, Reverse shapes, Create simple copy, Create transformed copy, Create shape element copy, Refine shape, Check geometry, Defeaturing, Appearance, Color per face

User documentation

• Getting started
• Installation: Download, Windows, Linux, Mac, Additional components, Docker, AppImage, Ubuntu Snap
• Basics: About FreeCAD, Interface, Mouse navigation, Selection methods, Object name, Preferences, Workbenches, Document structure, Properties, Help FreeCAD, Donate

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• Help: Tutorials, Video tutorials
• Workbenches: Std Base, Arch, Assembly, CAM, Draft, FEM, Inspection, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Start, Surface, TechDraw, Test Framework, Web

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• Addons: Addon Manager, External workbenches, Scripting and macros

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• Hubs: User hub, Power users hub, Developer hub