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109 | /* *****************************************************************
MESQUITE -- The Mesh Quality Improvement Toolkit
Copyright 2006 Lawrence Livermore National Laboratory. Under
the terms of Contract B545069 with the University of Wisconsin --
Madison, Lawrence Livermore National Laboratory retains certain
rights in this software.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
(lgpl.txt) along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
(2006) [email protected]
***************************************************************** */
/** \file ElemSampleQM.hpp
* \brief
* \author Jason Kraftcheck
*/
#ifndef MSQ_ELEM_SAMPLE_QM_HPP
#define MSQ_ELEM_SAMPLE_QM_HPP
#include "Mesquite.hpp"
#include "QualityMetric.hpp"
#include "Sample.hpp"
namespace MBMesquite
{
/**\brief Base type for metrics evaluated at several
* sample points within each element.
*
* This class defines an interface for metrics that are evaluated
* at multiple sample points within each element. This interface is
* used by ElemAverageQM and is the base for ElemCornerQM and
* ElemTargetQM.
*/
class ElemSampleQM : public QualityMetric
{
public:
MESQUITE_EXPORT virtual ~ElemSampleQM();
MESQUITE_EXPORT virtual MetricType get_metric_type() const<--- Function in derived class<--- Function in derived class<--- Function in derived class<--- Function in derived class<--- Function in derived class<--- Function in derived class<--- Function in derived class<--- Function in derived class
{
return ELEMENT_BASED;
}
/**\brief Get evaluation point handles for a given element
*
* Similar to QualityMetric::get_evaluations, this method returns
* a list of handles corresponding to sample points at which the
* metric may be evaluated. While QualityMetric::get_evaluations
* returns sample points for all elements in a PatchData, this
* method returns only the subset corresponding to a single element.
*/
MESQUITE_EXPORT virtual void get_element_evaluations( PatchData& pd,
size_t elem_index,
std::vector< size_t >& handles,
MsqError& err ) = 0;
/** Misc constants used in defining how element index, side dimension,
* and side number are packed into a single handle describing a logical
* location in the patch at which a sample-based metric is to be
* evaluated.
*/
#ifndef _WIN32
enum { /** the number of bits in a handle that are used to store element index */
ELEM_INDEX_BITS = sizeof( size_t ) * 8 - Sample::NUMBER_PACKED_BITS,
/** the maximum number of elements in a PatchData without overflowing handle space */
MAX_ELEM_PER_PATCH = ( (size_t)1 ) << ELEM_INDEX_BITS,
/** Mask to remove sample bits from handle */
ELEM_SAMPLE_MASK = MAX_ELEM_PER_PATCH - 1 };
#else /* MS Visual C compiler broken for 64-bit enums */
static const size_t ELEM_INDEX_BITS = sizeof( size_t ) * 8 - Sample::NUMBER_PACKED_BITS;
static const size_t MAX_ELEM_PER_PATCH = ( (size_t)1 ) << ELEM_INDEX_BITS;
static const size_t ELEM_SAMPLE_MASK = MAX_ELEM_PER_PATCH - 1;
#endif
inline static size_t handle( Sample sample, size_t index )
{
return ( sample.pack() << ELEM_INDEX_BITS ) | index;
}
inline static Sample sample( size_t handle )
{
return Sample( handle >> ELEM_INDEX_BITS );
}
inline static size_t elem( size_t handle )
{
return handle & ELEM_SAMPLE_MASK;
}
};
} // namespace MBMesquite
#endif
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