Open CASCADE Technology
7.5.0

This tool tries to unify faces and edges of the shape which lie on the same geometry. Faces/edges are considering as 'samedomain' if a group of neighbouring faces/edges are lying on coincident surfaces/curves. In this case these faces/edges can be unified into one face/edge. ShapeUpgrade_UnifySameDomain is initialized by a shape and the next optional parameters: UnifyFaces  tries to unify all possible faces UnifyEdges  tries to unify all possible edges ConcatBSplines  if this flag is set to true then all neighbouring edges, which lay on BSpline or Bezier curves with C1 continuity on their common vertices, will be merged into one common edge. More...
#include <ShapeUpgrade_UnifySameDomain.hxx>
Public Types  
typedef NCollection_DataMap< TopoDS_Shape, Handle< Geom_Plane >, TopTools_ShapeMapHasher >  DataMapOfFacePlane 
Public Types inherited from Standard_Transient  
typedef void  base_type 
Returns a type descriptor about this object. More...  
Public Member Functions  
ShapeUpgrade_UnifySameDomain ()  
Empty constructor. More...  
ShapeUpgrade_UnifySameDomain (const TopoDS_Shape &aShape, const Standard_Boolean UnifyEdges=Standard_True, const Standard_Boolean UnifyFaces=Standard_True, const Standard_Boolean ConcatBSplines=Standard_False)  
Constructor defining input shape and necessary flags. It does not perform unification. More...  
void  Initialize (const TopoDS_Shape &aShape, const Standard_Boolean UnifyEdges=Standard_True, const Standard_Boolean UnifyFaces=Standard_True, const Standard_Boolean ConcatBSplines=Standard_False) 
Initializes with a shape and necessary flags. It does not perform unification. If you intend to nullify the History place holder do it after initialization. More...  
void  AllowInternalEdges (const Standard_Boolean theValue) 
Sets the flag defining whether it is allowed to create internal edges inside merged faces in the case of nonmanifold topology. Without this flag merging through multi connected edge is forbidden. Default value is false. More...  
void  KeepShape (const TopoDS_Shape &theShape) 
Sets the shape for avoid merging of the faces/edges. This shape can be vertex or edge. If the shape is a vertex it forbids merging of connected edges. If the shape is a edge it forbids merging of connected faces. This method can be called several times to keep several shapes. More...  
void  KeepShapes (const TopTools_MapOfShape &theShapes) 
Sets the map of shapes for avoid merging of the faces/edges. It allows passing a ready to use map instead of calling many times the method KeepShape. More...  
void  SetSafeInputMode (Standard_Boolean theValue) 
Sets the flag defining the behavior of the algorithm regarding modification of input shape. If this flag is equal to True then the input (original) shape can't be modified during modification process. Default value is true. More...  
void  SetLinearTolerance (const Standard_Real theValue) 
Sets the linear tolerance. It plays the role of chord error when taking decision about merging of shapes. Default value is Precision::Confusion(). More...  
void  SetAngularTolerance (const Standard_Real theValue) 
Sets the angular tolerance. If two shapes form a connection angle greater than this value they will not be merged. Default value is Precision::Angular(). More...  
void  Build () 
Performs unification and builds the resulting shape. More...  
const TopoDS_Shape &  Shape () const 
Gives the resulting shape. More...  
const Handle< BRepTools_History > &  History () const 
Returns the history of the processed shapes. More...  
Handle< BRepTools_History > &  History () 
Returns the history of the processed shapes. More...  
Public Member Functions inherited from Standard_Transient  
Standard_Transient ()  
Empty constructor. More...  
Standard_Transient (const Standard_Transient &)  
Copy constructor – does nothing. More...  
Standard_Transient &  operator= (const Standard_Transient &) 
Assignment operator, needed to avoid copying reference counter. More...  
virtual  ~Standard_Transient () 
Destructor must be virtual. More...  
virtual void  Delete () const 
Memory deallocator for transient classes. More...  
virtual const opencascade::handle< Standard_Type > &  DynamicType () const 
Returns a type descriptor about this object. More...  
Standard_Boolean  IsInstance (const opencascade::handle< Standard_Type > &theType) const 
Returns a true value if this is an instance of Type. More...  
Standard_Boolean  IsInstance (const Standard_CString theTypeName) const 
Returns a true value if this is an instance of TypeName. More...  
Standard_Boolean  IsKind (const opencascade::handle< Standard_Type > &theType) const 
Returns true if this is an instance of Type or an instance of any class that inherits from Type. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More...  
Standard_Boolean  IsKind (const Standard_CString theTypeName) const 
Returns true if this is an instance of TypeName or an instance of any class that inherits from TypeName. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More...  
Standard_Transient *  This () const 
Returns nonconst pointer to this object (like const_cast). For protection against creating handle to objects allocated in stack or call from constructor, it will raise exception Standard_ProgramError if reference counter is zero. More...  
Standard_Integer  GetRefCount () const 
Get the reference counter of this object. More...  
void  IncrementRefCounter () const 
Increments the reference counter of this object. More...  
Standard_Integer  DecrementRefCounter () const 
Decrements the reference counter of this object; returns the decremented value. More...  
Protected Member Functions  
void  UnifyFaces () 
This method makes if possible a common face from each group of faces lying on coincident surfaces. More...  
void  UnifyEdges () 
This method makes if possible a common edge from each group of smothly connected edges, which are common for the same couple of faces. More...  
void  IntUnifyFaces (const TopoDS_Shape &theInpShape, TopTools_IndexedDataMapOfShapeListOfShape &theGMapEdgeFaces) 
void  FillHistory () 
Fills the history of the modifications during the operation. More...  
Additional Inherited Members  
Static Public Member Functions inherited from Standard_Transient  
static const char *  get_type_name () 
Returns a type descriptor about this object. More...  
static const opencascade::handle< Standard_Type > &  get_type_descriptor () 
Returns type descriptor of Standard_Transient class. More...  
This tool tries to unify faces and edges of the shape which lie on the same geometry. Faces/edges are considering as 'samedomain' if a group of neighbouring faces/edges are lying on coincident surfaces/curves. In this case these faces/edges can be unified into one face/edge. ShapeUpgrade_UnifySameDomain is initialized by a shape and the next optional parameters: UnifyFaces  tries to unify all possible faces UnifyEdges  tries to unify all possible edges ConcatBSplines  if this flag is set to true then all neighbouring edges, which lay on BSpline or Bezier curves with C1 continuity on their common vertices, will be merged into one common edge.
The input shape can be of any type containing faces or edges  compsolid, solid, shell, wire, compound of any kind of shapes. The algorithm preserves the structure of compsolids, solids, shells and wires. E.g., if two shells have a common edge and the faces sharing this edge lie on the same surface the algorithm will not unify these faces, otherwise the structure of shells would be broken. However, if such faces belong to different compounds of faces they will be unified.
The output result of the tool is the unified shape.
All the modifications of initial shape are recorded during unifying. Methods History are intended to:
typedef NCollection_DataMap<TopoDS_Shape, Handle< Geom_Plane >, TopTools_ShapeMapHasher> ShapeUpgrade_UnifySameDomain::DataMapOfFacePlane 
ShapeUpgrade_UnifySameDomain::ShapeUpgrade_UnifySameDomain  (  ) 
Empty constructor.
ShapeUpgrade_UnifySameDomain::ShapeUpgrade_UnifySameDomain  (  const TopoDS_Shape &  aShape, 
const Standard_Boolean  UnifyEdges = Standard_True , 

const Standard_Boolean  UnifyFaces = Standard_True , 

const Standard_Boolean  ConcatBSplines = Standard_False 

) 
Constructor defining input shape and necessary flags. It does not perform unification.
void ShapeUpgrade_UnifySameDomain::AllowInternalEdges  (  const Standard_Boolean  theValue  ) 
Sets the flag defining whether it is allowed to create internal edges inside merged faces in the case of nonmanifold topology. Without this flag merging through multi connected edge is forbidden. Default value is false.
void ShapeUpgrade_UnifySameDomain::Build  (  ) 
Performs unification and builds the resulting shape.

protected 
Fills the history of the modifications during the operation.

inline 
Returns the history of the processed shapes.

inline 
Returns the history of the processed shapes.
void ShapeUpgrade_UnifySameDomain::Initialize  (  const TopoDS_Shape &  aShape, 
const Standard_Boolean  UnifyEdges = Standard_True , 

const Standard_Boolean  UnifyFaces = Standard_True , 

const Standard_Boolean  ConcatBSplines = Standard_False 

) 
Initializes with a shape and necessary flags. It does not perform unification. If you intend to nullify the History place holder do it after initialization.

protected 
void ShapeUpgrade_UnifySameDomain::KeepShape  (  const TopoDS_Shape &  theShape  ) 
Sets the shape for avoid merging of the faces/edges. This shape can be vertex or edge. If the shape is a vertex it forbids merging of connected edges. If the shape is a edge it forbids merging of connected faces. This method can be called several times to keep several shapes.
void ShapeUpgrade_UnifySameDomain::KeepShapes  (  const TopTools_MapOfShape &  theShapes  ) 
Sets the map of shapes for avoid merging of the faces/edges. It allows passing a ready to use map instead of calling many times the method KeepShape.

inline 
Sets the angular tolerance. If two shapes form a connection angle greater than this value they will not be merged. Default value is Precision::Angular().

inline 
Sets the linear tolerance. It plays the role of chord error when taking decision about merging of shapes. Default value is Precision::Confusion().
void ShapeUpgrade_UnifySameDomain::SetSafeInputMode  (  Standard_Boolean  theValue  ) 
Sets the flag defining the behavior of the algorithm regarding modification of input shape. If this flag is equal to True then the input (original) shape can't be modified during modification process. Default value is true.

inline 
Gives the resulting shape.

protected 
This method makes if possible a common edge from each group of smothly connected edges, which are common for the same couple of faces.

protected 
This method makes if possible a common face from each group of faces lying on coincident surfaces.