
##################
A3DTopoContextData
##################

.. c:struct:: A3DTopoContextData

   Structure for parsing or creating an :c:type:`~A3DTopoContext`\ entity.
   
   
      2.0
   
   
   The :c:member:`m_ucBehaviour <A3DTopoContextData.m_ucBehaviour>`\ member is an array of bits that uses values from the topology context bitmask definitions (:ref:`Topology Context Data <group__a3d__topocontextdata>`\ ).
   
   
      :c:member:`m_dScale <A3DTopoContextData.m_dScale>`\ is a conversion factor from the unit of the part (which is not mandatory millimeters) to the "unit" of the modeling kernel. In fact, there is NO notion of physical unit at the level of the "TopoContext". The numbers that are stored there do not have a physical significance by themselves. To interpret them, you should take into account the unit of the part and the "TopoContext" context scale. Then, there can be further scale on the product hierarchy that should be taken into account when converting entities while respecting a given accuracy towards original geometry.
   
   
   
      :c:struct:`~A3DTopoContextData`\ , :c:func:`~A3DTopoContextGet`\ , :c:func:`~A3DTopoContextCreate`
   
   
   
   Index
   =====
   
   .. rubric:: Variables
   
   
   .. rst-class:: api-xref-list
   
   
   * :c:member:`~A3DTopoContextData.m_ucBehaviour`
   * :c:member:`~A3DTopoContextData.m_dGranularity`
   * :c:member:`~A3DTopoContextData.m_dTolerance`
   * :c:member:`~A3DTopoContextData.m_bHaveSmallestFaceThickness`
   * :c:member:`~A3DTopoContextData.m_dSmallestThickness`
   * :c:member:`~A3DTopoContextData.m_bHaveScale`
   * :c:member:`~A3DTopoContextData.m_dScale`
   
   



.. rst-class:: kind-group kind-variable

.. rubric:: Variables
   :class: kind-group-title


.. c:member:: A3DUns8 A3DTopoContextData.m_ucBehaviour

      .. rst-class:: sig-pretty-signature
      
         | :c:type:`~A3DUns8`
      
      Array of bits.
      



.. c:member:: A3DDouble A3DTopoContextData.m_dGranularity

      .. rst-class:: sig-pretty-signature
      
         | :c:type:`~A3DDouble`
      
      Minimal size of an edge.
      
      This value is non-dimensional.
      



.. c:member:: A3DDouble A3DTopoContextData.m_dTolerance

      .. rst-class:: sig-pretty-signature
      
         | :c:type:`~A3DDouble`
      
      Global base tolerance used in the context for topological elements.
      
      This value is non-dimensional.
      



.. c:member:: A3DBool A3DTopoContextData.m_bHaveSmallestFaceThickness

      .. rst-class:: sig-pretty-signature
      
         | :c:type:`~A3DBool`
      
      True if next member is valid.
      



.. c:member:: A3DDouble A3DTopoContextData.m_dSmallestThickness

      .. rst-class:: sig-pretty-signature
      
         | :c:type:`~A3DDouble`
      
      Smallest thickness for a face.
      
      Used in internal loop processing. Default should be 100 \* :c:member:`m_dGranularity <A3DTopoContextData.m_dGranularity>`\ .
      



.. c:member:: A3DBool A3DTopoContextData.m_bHaveScale

      .. rst-class:: sig-pretty-signature
      
         | :c:type:`~A3DBool`
      
      True if next member is valid.
      



.. c:member:: A3DDouble A3DTopoContextData.m_dScale

      .. rst-class:: sig-pretty-signature
      
         | :c:type:`~A3DDouble`
      
      Optional scale to interpret the data of the context.
      




