// Created on: 1993-07-22
// Created by: Isabelle GRIGNON
// Copyright (c) 1993-1999 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 _BRepBndLib_HeaderFile
#define _BRepBndLib_HeaderFile
#include
#include
#include
#include
class TopoDS_Shape;
class Bnd_Box;
class Bnd_OBB;
//! This package provides the bounding boxes for curves
//! and surfaces from BRepAdaptor.
//! Functions to add a topological shape to a bounding box
class BRepBndLib
{
public:
DEFINE_STANDARD_ALLOC
//! Adds the shape S to the bounding box B.
//! More precisely are successively added to B:
//! - each face of S; the triangulation of the face is used if it exists,
//! - then each edge of S which does not belong to a face,
//! the polygon of the edge is used if it exists
//! - and last each vertex of S which does not belong to an edge.
//! After each elementary operation, the bounding box B is
//! enlarged by the tolerance value of the relative sub-shape.
//! When working with the triangulation of a face this value of
//! enlargement is the sum of the triangulation deflection and
//! the face tolerance. When working with the
//! polygon of an edge this value of enlargement is
//! the sum of the polygon deflection and the edge tolerance.
//! Warning
//! - This algorithm is time consuming if triangulation has not
//! been inserted inside the data structure of the shape S.
//! - The resulting bounding box may be somewhat larger than the object.
Standard_EXPORT static void Add (const TopoDS_Shape& S, Bnd_Box& B, const Standard_Boolean useTriangulation = Standard_True);
//! Adds the shape S to the bounding box B.
//! This is a quick algorithm but only works if the shape S is
//! composed of polygonal planar faces, as is the case if S is
//! an approached polyhedral representation of an exact
//! shape. Pay particular attention to this because this
//! condition is not checked and, if it not respected, an error
//! may occur in the algorithm for which the bounding box is built.
//! Note that the resulting bounding box is not enlarged by the
//! tolerance value of the sub-shapes as is the case with the
//! Add function. So the added part of the resulting bounding
//! box is closer to the shape S.
Standard_EXPORT static void AddClose (const TopoDS_Shape& S, Bnd_Box& B);
//! Adds the shape S to the bounding box B.
//! This algorith builds precise bounding box,
//! which differs from exact geometry boundaries of shape only on shape entities tolerances
//! Algorithm is the same as for method Add(..), but uses more precise methods for building boxes
//! for geometry objects.
//! If useShapeTolerance = True, bounding box is enlardged by shape tolerances and
//! these tolerances are used for numerical methods of bounding box size calculations,
//! otherwise bounding box is built according to sizes of uderlined geometrical entities,
//! numerical calculation use tolerance Precision::Confusion().
Standard_EXPORT static void AddOptimal (const TopoDS_Shape& S, Bnd_Box& B,
const Standard_Boolean useTriangulation = Standard_True,
const Standard_Boolean useShapeTolerance = Standard_False);
//! Computes the Oriented Bounding box for the shape .
//! Two independent methods of computation are implemented:
//! first method based on set of points (so, it demands the
//! triangulated shape or shape with planar faces and linear edges).
//! The second method is based on use of inertia axes and is called
//! if use of the first method is impossible.
//! If theIsTriangulationUsed == FALSE then the triangulation will
//! be ignored at all.
//! If theIsShapeToleranceUsed == TRUE then resulting box will be
//! extended on the tolerance of the shape.
//! theIsOptimal flag defines whether to look for the more tight
//! OBB for the cost of performance or not.
Standard_EXPORT static
void AddOBB(const TopoDS_Shape& theS,
Bnd_OBB& theOBB,
const Standard_Boolean theIsTriangulationUsed = Standard_True,
const Standard_Boolean theIsOptimal = Standard_False,
const Standard_Boolean theIsShapeToleranceUsed = Standard_True);
protected:
private:
};
#endif // _BRepBndLib_HeaderFile