0031668: Visualization - WebGL sample doesn't work on Emscripten 1.39

[occt.git] / src / BRepMesh / BRepMesh_SphereRangeSplitter.hxx

// Created on: 2016-07-07
// Copyright (c) 2016 OPEN CASCADE SAS
// Created by: Oleg AGASHIN
//
// 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 _BRepMesh_SphereRangeSplitter_HeaderFile
#define _BRepMesh_SphereRangeSplitter_HeaderFile

#include <BRepMesh_DefaultRangeSplitter.hxx>
#include <IMeshTools_Parameters.hxx>

//! Auxiliary class extending default range splitter in
//! order to generate internal nodes for spherical surface.
class BRepMesh_SphereRangeSplitter : public BRepMesh_DefaultRangeSplitter
{
public:

  //! Constructor.
  BRepMesh_SphereRangeSplitter()
  {
  }

  //! Destructor.
  virtual ~BRepMesh_SphereRangeSplitter()
  {
  }

  //! Returns list of nodes generated using surface data and specified parameters.
  Standard_EXPORT virtual Handle(IMeshData::ListOfPnt2d) GenerateSurfaceNodes(
    const IMeshTools_Parameters& theParameters) const Standard_OVERRIDE;

private:

  //! Computes step for the given range.
  inline void computeStep(
    const std::pair<Standard_Real, Standard_Real>& theRange,
    const Standard_Real                            theDefaultStep,
    std::pair<Standard_Real, Standard_Real>&       theStepAndOffset) const
  {
    const Standard_Real aDiff = theRange.second - theRange.first;
    theStepAndOffset.first  = aDiff / ((Standard_Integer) (aDiff / theDefaultStep) + 1);
    theStepAndOffset.second = theRange.second - Precision::PConfusion();
  }
};

#endif