# Vertex defined with multiple positions

Entity type is `kA3DTypeTopoMultipleVertex`.

A multiple vertex is defined as the average position of several 3D points, which are typically the endpoints of edge curves that end at this vertex.

> In general, no constraint is given to the 3D points stored in the array referenced by the `A3DTopoMultipleVertexData::m_pPts`member. In particular, the same point (same coordinates) may appear multiple times in that array. This is a common behavior, and all these points must be taken into account to evaluate the tolerance.

Returns

> `A3D_SUCCESS`on success, or an error code on failure

Structures

- `A3DTopoMultipleVertexData`

Functions

- `A3DTopoMultipleVertexGet()`
- `A3DTopoMultipleVertexCreate()`

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