Donate

소개

FreeCAD에서 형상(Shape)이라는 단어는 일반적으로 Part TopoShape(Part::TopoShape 클래스)를 나타내는 데 사용됩니다. 이것은 요소에 3D 기하학적 및 파라메트릭 표현(큐브, 피라미드, 구, 원통, 융합 등)을 제공하는 개체 유형입니다.

기본적으로 3D view에 표시되는 모든 개체에는 TopoShape가 있습니다. 단, "Meshes"(Mesh::MeshObject 클래스)는 예외입니다. .

이 객체 유형에 대한 자세한 내용은 Part TopoShape를 참조하세요.

왼쪽: 속성에 의해 정의된 파라메트릭 형상. 오른쪽: 정점과 삼각형 표면으로 정의되는 mesh.

용법

Shapes are normally created by internal functions of the Part Workbench, and are ultimately defined by the OpenCASCADE Technology kernel (OCCT).

Once a Shape is created, it can be used and modified by all workbenches by creating scripted objects around that Shape.

Essentially, every object derived from a Part Feature (Part::Feature class) is expected to hold and manipulate a Shape.

Any OpenCascade Shape has a tesselation mainly to view the Shape on screen. More information about this can be found in this German forum post and in the OpenCascad Mesh documentation.

Notes

In informal usage, a "Shape" may be any geometrical figure that is visible in the 3D View, and thus its concept may be confused with that of "Body" or "Part".

However, when more precision is required, the distinction must be made.

• A "Body" is an object derived from a Part Feature (Part::Feature class), created with the PartDesign Workbench.
• A "Shape" is an internal object, embedded within the "Body".
• A "Part" is used to group several "Bodies" to form an assembly. A "Part" has a collection of "Shapes", but doesn't have a "Shape" of its own.