A3DTopoContextData

struct A3DTopoContextData

Structure for parsing or creating an A3DTopoContext entity.

2.0

The m_ucBehaviour member is an array of bits that uses values from the topology context bitmask definitions (Topology Context Data).

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.

A3DTopoContextData, A3DTopoContextGet(), A3DTopoContextCreate()