# A3DTopoEdgeData

struct `A3DTopoEdgeData`

  Edge structure.

  > 2.0

  When parsing this structure, use a tolerance that is the greatest of these values:

  - `A3DTopoContextData::m_dTolerance`member for the entity
  - Tolerance
  - See note about orientation in Topology Module.
  - If the `m_p3dCurve`member is null, either the edge is degenerated or all co-edges have UV curves.

  ## Index

  Variables

  - `m_pStartVertex`
  - `m_pEndVertex`
  - `m_p3dCurve`
  - `m_bHasTrimDomain`
  - `m_sInterval`
  - `m_dTolerance`

Variables

A3DTopoVertex *`A3DTopoEdgeData.``m_pStartVertex`
  `A3DTopoVertex`*

  Start vertex; can be either an `A3DTopoMultipleVertex`or an `A3DTopoUniqueVertex`.

A3DTopoVertex *`A3DTopoEdgeData.``m_pEndVertex`
  `A3DTopoVertex`*

  End vertex; can be either an `A3DTopoMultipleVertex`or an `A3DTopoUniqueVertex`.

A3DCrvBase *`A3DTopoEdgeData.``m_p3dCurve`
  `A3DCrvBase`*

  Pointer to 3D space curve.

A3DBool `A3DTopoEdgeData.``m_bHasTrimDomain`
  `A3DBool`

  A value of true indicates the edge has a trim domain.

A3DIntervalData `A3DTopoEdgeData.``m_sInterval`
  `A3DIntervalData`

  Trimming domain for 3D curve.

A3DDouble `A3DTopoEdgeData.``m_dTolerance`
  `A3DDouble`

  Edge tolerance.

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