fd4bcb39ea
git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@1258 fdac6126-5c0c-442c-9429-916003d36597
118 lines
5.4 KiB
C++
118 lines
5.4 KiB
C++
/* ========================================================================= *
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* *
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* OpenMesh *
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* Copyright (c) 2001-2015, RWTH-Aachen University *
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* Department of Computer Graphics and Multimedia *
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* All rights reserved. *
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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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* *
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* Redistribution and use in source and binary forms, with or without *
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* modification, are permitted provided that the following conditions *
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* are met: *
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* *
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* 1. Redistributions of source code must retain the above copyright notice, *
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* this list of conditions and the following disclaimer. *
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* *
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* 2. Redistributions in binary form must reproduce the above copyright *
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* notice, this list of conditions and the following disclaimer in the *
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* documentation and/or other materials provided with the distribution. *
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* *
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* 3. Neither the name of the copyright holder nor the names of its *
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* contributors may be used to endorse or promote products derived from *
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* this software without specific prior written permission. *
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* *
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS *
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER *
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, *
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, *
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR *
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF *
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING *
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS *
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
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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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