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//   
//   This application incorporates Open Design Alliance software pursuant to a license 
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///////////////////////////////////////////////////////////////////////////////

// This file is generated automatically.

#ifndef _IFC4X1_IFCLOOP_AUTO_IMPL_H
#define _IFC4X1_IFCLOOP_AUTO_IMPL_H

#include "IfcTopologicalRepresentationItemAutoImpl.h"

#include "TD_PackPush.h"

/** \details
  The namespace contains schema-dependent classes, definitions and sub routines
  for work with IFC4X1 express schema definitions.
*/
namespace OdIfc4x1 {

/** \details
  A loop is a topological entity constructed from a single vertex, or by stringing together connected (oriented) edges, 
  or linear segments beginning and ending at the same vertex. It is typically used to bound a face lying on a surface. 
  A loop has dimensionality of 0 or 1. The domain of a 0-dimensional loop is a single point. 
  The domain of a 1-dimensional loop is a connected, oriented curve, but need not to be manifold. 
  As the loop is a circle, the location of its beginning/ending point is arbitrary. 
  A loop is represented by a single vertex, 
  or by an ordered collection of oriented edges, or by an ordered collection of points. 
  A loop is a graph, so M and the graph genus Gl can be determined by the graph traversal algorithm. 
  Since M = 1, the Euler equation reduces in this case to
  
  <pre>
  ( V-E&sub;l ) - ( 1-G&sup;l ) = 0
  </pre>
  
  where V and E~l~ are the number of unique vertices and oriented edges in the loop and G^l^ is the genus of the loop.
*/
class IFC4X1_EXPORT IfcLoop : public IfcTopologicalRepresentationItem
{
  //DOM-IGNORE-BEGIN
  OD_EXP_DECLARE_MEMBERS(OdIfc4x1::IfcLoop);
  //DOM-IGNORE-END


public:

  /** \details
  Returns a type of a class instance.
  \returns
  Pointer to the <exref target="OdDAI__Entity.html">OdDAI::Entity</exref> type that determines an entity definition within a schema.
  */
  virtual OdDAI::Entity* getInstanceType() const override;

  /** \details
  Checks whether the specified instance is the object derived from or belongs to this class.
  \param entityType [in] Entity to check.
  \returns
  true if the specified instance is the object derived from or belongs to this class, false otherwise.
  */
  virtual bool isKindOf(OdIfc::OdIfcEntityType entityType) const override;

  /** \details
  Returns the type of this entity.
  \returns
  A value of the <exref target="OdIfc__OdIfcEntityType.html">OdIfc::OdIfcEntityType</exref> type that represents type of this entity.
  */
  virtual OdIfc::OdIfcEntityType type() const override;
};

/** \details
  A data type that represents a smart pointer to a <exref target="OdIfc4x1__IfcLoop.html">IfcLoop</exref> object.
*/
typedef OdSmartPtr<IfcLoop> IfcLoopPtr;

} // namespace

#include "TD_PackPop.h"

#endif // _IFC4X1_IFCLOOP_AUTO_IMPL_H