BrepData

Entity type is:c:enumerator:~kA3DTypeTopoBrepData.

Orientations

Here are some important points about:c:type:~A3DTopoBrepDataentity orientation:

  • Edges are implicitly oriented from the Start vertex toward the End vertex.
  • 3D curves referenced by edges are oriented from the Start vertex toward the End vertex.
  • Orientation with loop, which relates to the corresponding edge.
  • Orientation UV with loop, which relates to the space parametric curve attached to the co-edge, if defined.
  • Co-edge has two flags that describe orientation:
  • Loop is oriented regarding Ampere rule (in surface parametric space).
  • Surface is oriented with the shell so that normals point from the material to the void.

Generally, a face containing a hole is defined with two loops having the same orientation. The outside loop is defined by the``m_uiOuterLoopIndex``member of an:c:struct:~A3DTopoFaceDatastructure, regardless of orientation. To get the real face normal vector, you must consider the surface normal vector and the``m_pucOrientationWithShell``member of the:c:struct:~A3DTopoShellDatastructure.

sa:c:type:~A3DTopoBrepData,:c:struct:~A3DTopoBrepDataData, A3DTopoBrepDataGet, A3DTopoBrepDataCreate

Returns

A3D_SUCCESSon success, or an error code on failure

Structures

Functions