Description

Each part of a model may contain B-Rep bodies. In this example, a visitor is used to obtain ModelData_Part from a ModelData_Model . A vector of ModelData_Body objects is then obtained from every individual part.

Each ModelData_Body is the owner of topological entities represented by ModelData_Shape . We can iterate over ModelData_Body to access the shapes it contains.

ModelData_Shape may store information about its ModelData_Shape.Orientation . MTK provides two types of shape hashers and equality operations: ModelData_OrientedShapeHash and ModelData_UnorientedShapeHash . Which one should be used depends on whether orientation should be considered:

#define ShapesOrientationIsUsed 0
 
#if ShapesOrientationIsUsed
typedef ModelData::OrientedShapeHash  HasherType;
typedef ModelData::OrientedShapeEqual EqualerType;
#else
typedef ModelData::UnorientedShapeHash  HasherType;
typedef ModelData::UnorientedShapeEqual EqualerType;
#endif

Shapes comparison is based on entity, location and orientation. There are two ways to compare shapes:

ModelData_Shape.IsEqual() checks if two shapes match exactly in all three aspects.
ModelData_Shape.IsSame() compares only entity and location, ignoring orientation.

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