// Created on: 1992-02-14 // Created by: Jean Claude VAUTHIER // Copyright (c) 1992-1999 Matra Datavision // Copyright (c) 1999-2014 OPEN CASCADE SAS // // This file is part of Open CASCADE Technology software library. // // This library is free software; you can redistribute it and/or modify it under // the terms of the GNU Lesser General Public License version 2.1 as published // by the Free Software Foundation, with special exception defined in the file // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT // distribution for complete text of the license and disclaimer of any warranty. // // Alternatively, this file may be used under the terms of Open CASCADE // commercial license or contractual agreement. #ifndef _GProp_PGProps_HeaderFile #define _GProp_PGProps_HeaderFile #include #include #include #include #include #include #include #include #include class gp_Pnt; //! A framework for computing the global properties of a //! set of points. //! A point mass is attached to each point. The global //! mass of the system is the sum of each individual //! mass. By default, the point mass is equal to 1 and the //! mass of a system composed of N points is equal to N. //! Warning //! A framework of this sort provides functions to handle //! sets of points easily. But, like any GProp_GProps //! object, by using the Add function, it can theoretically //! bring together the computed global properties and //! those of a system more complex than a set of points . //! The mass of each point and the density of each //! component of the composed system must be //! coherent. Note that this coherence cannot be checked. //! Nonetheless, you are advised to restrict your use of a //! GProp_PGProps object to a set of points and to //! create a GProp_GProps object in order to bring //! together global properties of different systems. class GProp_PGProps : public GProp_GProps { public: DEFINE_STANDARD_ALLOC //! Initializes a framework to compute global properties //! on a set of points. //! The point relative to which the inertia of the system is //! computed will be the origin (0, 0, 0) of the //! absolute Cartesian coordinate system. //! At initialization, the framework is empty, i.e. it retains //! no dimensional information such as mass and inertia. //! It is, however, now able to keep global properties of a //! set of points while new points are added using the //! AddPoint function. //! The set of points whose global properties are brought //! together by this framework will then be referred to as //! the current system. The current system is, however, //! not kept by this framework, which only keeps that //! system's global properties. Note that the current //! system may be more complex than a set of points. Standard_EXPORT GProp_PGProps(); //! Brings together the global properties already //! retained by this framework with those induced by //! the point Pnt. Pnt may be the first point of the current system. //! A point mass is attached to the point Pnt, it is either //! equal to 1. or to Density. Standard_EXPORT void AddPoint (const gp_Pnt& P); //! Adds a new point P with its density in the system of points //! Exceptions //! Standard_DomainError if the mass value Density //! is less than gp::Resolution(). Standard_EXPORT void AddPoint (const gp_Pnt& P, const Standard_Real Density); //! computes the global properties of the system of points Pnts. //! The density of the points are defaulted to all being 1 Standard_EXPORT GProp_PGProps(const TColgp_Array1OfPnt& Pnts); //! computes the global properties of the system of points Pnts. //! The density of the points are defaulted to all being 1 Standard_EXPORT GProp_PGProps(const TColgp_Array2OfPnt& Pnts); //! computes the global properties of the system of points Pnts. //! A density is associated with each point. //! //! raises if a density is lower or equal to Resolution from package //! gp. //! //! raises if the length of Pnts and the length of Density //! is not the same. Standard_EXPORT GProp_PGProps(const TColgp_Array1OfPnt& Pnts, const TColStd_Array1OfReal& Density); //! computes the global properties of the system of points Pnts. //! A density is associated with each point. //! //! Raised if a density is lower or equal to Resolution from package //! gp. //! //! Raised if the length of Pnts and the length of Density //! is not the same. Standard_EXPORT GProp_PGProps(const TColgp_Array2OfPnt& Pnts, const TColStd_Array2OfReal& Density); //! Computes the barycentre of a set of points. The density of the //! points is defaulted to 1. Standard_EXPORT static gp_Pnt Barycentre (const TColgp_Array1OfPnt& Pnts); //! Computes the barycentre of a set of points. The density of the //! points is defaulted to 1. Standard_EXPORT static gp_Pnt Barycentre (const TColgp_Array2OfPnt& Pnts); //! Computes the barycentre of a set of points. A density is associated //! with each point. //! //! raises if a density is lower or equal to Resolution from package //! gp. //! //! Raised if the length of Pnts and the length of Density //! is not the same. Standard_EXPORT static void Barycentre (const TColgp_Array1OfPnt& Pnts, const TColStd_Array1OfReal& Density, Standard_Real& Mass, gp_Pnt& G); //! Computes the barycentre of a set of points. A density is associated //! with each point. //! //! Raised if a density is lower or equal to Resolution from package //! gp. //! //! Raised if the length of Pnts and the length of Density //! is not the same. Standard_EXPORT static void Barycentre (const TColgp_Array2OfPnt& Pnts, const TColStd_Array2OfReal& Density, Standard_Real& Mass, gp_Pnt& G); protected: private: }; #endif // _GProp_PGProps_HeaderFile