89 lines
2.4 KiB
C++
89 lines
2.4 KiB
C++
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#ifndef __COSMO_DINTERPOLATE_HPP
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#define __COSMO_DINTERPOLATE_HPP
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#include "config.hpp"
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#include "mykdtree.hpp"
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#include <gsl/gsl_eigen.h>
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namespace CosmoTool {
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template<typename PType, typename IType, int N>
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class DelaunayInterpolate {
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public:
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struct SimplexAccess {
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int32_t *simplex_list;
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};
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typedef KDTree<N, SimplexAccess, PType> QuickTree;
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typedef typename QuickTree::Cell QuickCell;
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typedef PType CoordType[N];
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QuickTree *quickAccess;
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QuickCell *cells;
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PType *all_preweight;
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int32_t *point_to_simplex_list_base;
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IType *values;
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CoordType *positions;
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uint32_t numPoints;
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uint32_t numSimplex;
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uint32_t *simplex_list;
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gsl_eigen_symmv_workspace *eigen_work;
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/**
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* This construct the interpolator. The construction is time consuming so
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* please do it the less possible number of times, especially if you have
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* a large number of points.
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*
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* @param positions list of the positions
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* @param values list of the values taken at each position
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* @param simplex_list list of points for each simplex. The packing
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* is the following:
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* [t(0,1),t(0,2),...,t(0,n+1),t(1,0),t(1,1),...,t(1,n+1),..],
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* with t(i,j) the i-th simplex and j-th point of the simplex. The indexes
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* refer to the previous list of points.
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* @param numPoints the number of points
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*/
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DelaunayInterpolate(CoordType *positions, IType *values, uint32_t *simplex_list,
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uint32_t numPoints, uint32_t numSimplex)
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{
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this->positions = positions;
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this->values = values;
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this->simplex_list = simplex_list;
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this->numPoints = numPoints;
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this->numSimplex = numSimplex;
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buildPreweight();
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buildQuickAccess();
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eigen_work = gsl_eigen_symmv_alloc(N);
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}
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~DelaunayInterpolate()
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{
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delete[] cells;
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delete quickAccess;
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delete[] point_to_simplex_list_base;
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delete[] all_preweight;
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gsl_eigen_symmv_free(eigen_work);
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}
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void buildPreweight();
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void buildQuickAccess();
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void buildHyperplane(const PType *v, CoordType& hyper);
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bool checkPointInSimplex(const CoordType& pos, uint32_t simplex);
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uint32_t findSimplex(const CoordType& pos)
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throw (InvalidArgumentException);
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IType computeValue(const CoordType& pos)
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throw (InvalidArgumentException);
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};
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};
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#include "dinterpolate.tcc"
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#endif
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