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New algorithms calculating global properties on mesh data have been added: - BRepGProp_MeshCinert computes the global properties of polylines represented by a set of points; - BRepGProp_MeshProps computes the global properties of a surface mesh. Existing tool BRepGProp now automatically uses new algorithm for triangulation-only faces. By default, algorithm will use exact geometry objects (surfaces), when it is available (as before the patch); this behavior can be switched by a new flag UseTriangulation, forcing usage of triangulation instead of exact geometry when both defined.
91 lines
3.4 KiB
C++
91 lines
3.4 KiB
C++
// Copyright (c) 2018 OPEN CASCADE SAS
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// This file is part of commercial software by OPEN CASCADE SAS,
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// furnished in accordance with the terms and conditions of the contract
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// and with the inclusion of this copyright notice.
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// This file or any part thereof may not be provided or otherwise
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// made available to any third party.
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//
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// No ownership title to the software is transferred hereby.
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//
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// OPEN CASCADE SAS makes no representation or warranties with respect to the
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// performance of this software, and specifically disclaims any responsibility
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// for any damages, special or consequential, connected with its use.
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#ifndef _BRepGProp_MeshProps_HeaderFile
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#define _BRepGProp_MeshProps_HeaderFile
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#include <Standard.hxx>
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#include <Standard_DefineAlloc.hxx>
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#include <Standard_Handle.hxx>
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#include <Standard_Type.hxx>
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#include <GProp_GProps.hxx>
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#include <TopAbs_Orientation.hxx>
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#include <Poly_Array1OfTriangle.hxx>
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#include <TColgp_Array1OfPnt.hxx>
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class Poly_Triangulation;
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class TopLoc_Location;
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class gp_Pnt;
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//! Computes the global properties of a surface mesh. The mesh can be
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//! interpreted as just a surface or as a piece of volume limited by this surface.
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class BRepGProp_MeshProps : public GProp_GProps
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{
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public:
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DEFINE_STANDARD_ALLOC
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//! Describes types of geometric objects.
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//! - Vinert is 3D closed region of space delimited with
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//! Point and surface mesh;
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//! - Sinert is surface mesh in 3D space.
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typedef enum { Vinert = 0, Sinert } BRepGProp_MeshObjType;
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//! Constructor takes the type of object.
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BRepGProp_MeshProps(const BRepGProp_MeshObjType theType) :
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myType(theType)
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{}
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//! Sets the point relative which the calculation is to be done
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void SetLocation(const gp_Pnt& theLocation) { loc = theLocation; }
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//! Computes the global properties of a surface mesh of 3D space.
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//! Calculation of surface properties is performed by numerical integration
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//! over triangle surfaces using Gauss cubature formulas.
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//! Depending on the mesh object type used in constructor this method can
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//! calculate the surface or volume properties of the mesh.
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Standard_EXPORT void Perform(const Handle(Poly_Triangulation)& theMesh,
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const TopLoc_Location& theLoc,
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const TopAbs_Orientation theOri);
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Standard_EXPORT void Perform(const TColgp_Array1OfPnt& theNodes,
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const Poly_Array1OfTriangle& theTriangles,
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const TopAbs_Orientation theOri);
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//! Computes the global properties of triangle {p1, p2, p3} relatively
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//! point Apex
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//! If isVolume = true, volume properties are calculated
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//! otherwise - surface ones
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Standard_EXPORT static void CalculateProps(const gp_Pnt& p1, const gp_Pnt& p2, const gp_Pnt& p3,
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const gp_Pnt& Apex,
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const Standard_Boolean isVolume,
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Standard_Real GProps[10],
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const Standard_Integer NbGaussPoints,
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const Standard_Real* GaussPnts);
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//! Get type of mesh object
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BRepGProp_MeshObjType GetMeshObjType() const
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{
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return myType;
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}
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private: //! @name private fields
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BRepGProp_MeshObjType myType; //!< Type of geometric object
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};
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#endif // _BRepGProp_MeshProps_HeaderFile
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