25bef693c8
git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@873 fdac6126-5c0c-442c-9429-916003d36597
111 lines
4.9 KiB
C++
111 lines
4.9 KiB
C++
/*===========================================================================*\
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* *
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* OpenMesh *
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* Copyright (C) 2001-2012 by Computer Graphics Group, RWTH Aachen *
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* www.openmesh.org *
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* *
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*---------------------------------------------------------------------------*
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* This file is part of OpenMesh. *
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* *
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* OpenMesh is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU Lesser General Public License as *
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* published by the Free Software Foundation, either version 3 of *
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* the License, or (at your option) any later version with the *
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* following exceptions: *
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* *
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* If other files instantiate templates or use macros *
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* or inline functions from this file, or you compile this file and *
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* link it with other files to produce an executable, this file does *
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* not by itself cause the resulting executable to be covered by the *
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* GNU Lesser General Public License. This exception does not however *
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* invalidate any other reasons why the executable file might be *
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* covered by the GNU Lesser General Public License. *
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* *
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* OpenMesh is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU LesserGeneral Public *
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* License along with OpenMesh. If not, *
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* see <http://www.gnu.org/licenses/>. *
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* *
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\*===========================================================================*/
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/*===========================================================================*\
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* *
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* $Revision: 693 $ *
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* $Date: 2012-09-23 16:25:16 +0200 (So, 23 Sep 2012) $ *
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* *
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\*===========================================================================*/
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//=============================================================================
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//
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// Helper Functions for generating a random number between 0.0 and 1.0 with
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// a garantueed resolution
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//
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//=============================================================================
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#ifndef OPENMESH_UTILS_RANDOMNUMBERGENERATOR_HH
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#define OPENMESH_UTILS_RANDOMNUMBERGENERATOR_HH
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//== INCLUDES =================================================================
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#include <OpenMesh/Core/System/config.h>
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#include <cstdlib>
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//== NAMESPACES ===============================================================
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namespace OpenMesh {
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//=============================================================================
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/** Generate a random number between 0.0 and 1.0 with a guaranteed resolution
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* ( Number of possible values )
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*
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* Especially useful on windows, as there MAX_RAND is often only 32k which is
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* not enough resolution for a lot of applications
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*/
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class OPENMESHDLLEXPORT RandomNumberGenerator
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{
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public:
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/** \brief Constructor
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*
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* @param _resolution specifies the desired resolution for the random number generated
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*/
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RandomNumberGenerator(const size_t _resolution);
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/// returns a random double between 0.0 and 1.0 with a guaranteed resolution
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double getRand() const;
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double resolution() const;
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private:
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/// desired resolution
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const size_t resolution_;
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/// number of "blocks" of RAND_MAX that make up the desired _resolution
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size_t iterations_;
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/// maximum random number generated, which is used for normalization
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double maxNum_;
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};
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//=============================================================================
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} // namespace OpenMesh
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//=============================================================================
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#endif // OPENMESH_UTILS_RANDOMNUMBERGENERATOR_HH defined
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//=============================================================================
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