84 lines
3.0 KiB
C++
84 lines
3.0 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2015 Alec Jacobson <alecjacobson@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#include "parse_rhs.h"
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#include <algorithm>
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template <typename DerivedV>
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IGL_INLINE void igl::matlab::parse_rhs_double(
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const mxArray *prhs[],
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Eigen::PlainObjectBase<DerivedV> & V)
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{
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using namespace Eigen;
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// Use Eigen's map and cast to copy
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V = Map< Matrix<double,Dynamic,Dynamic> >
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(mxGetPr(prhs[0]),mxGetM(prhs[0]),mxGetN(prhs[0]))
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.cast<typename DerivedV::Scalar>();
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}
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template <typename DerivedV>
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IGL_INLINE void igl::matlab::parse_rhs_index(
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const mxArray *prhs[],
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Eigen::PlainObjectBase<DerivedV> & V)
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{
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parse_rhs_double(prhs,V);
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V.array() -= 1;
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}
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template <typename MT>
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IGL_INLINE void igl::matlab::parse_rhs(
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const mxArray *prhs[],
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Eigen::SparseMatrix<MT> & M)
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{
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using namespace Eigen;
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using namespace std;
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const mxArray * mx_data = prhs[0];
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// Handle boring case where matrix is actually an empty dense matrix
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if(mxGetNumberOfElements(mx_data) == 0)
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{
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M.resize(0,0);
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return;
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}
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assert(mxIsSparse(mx_data));
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assert(mxGetNumberOfDimensions(mx_data) == 2);
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//cout<<name<<": "<<mxGetM(mx_data)<<" "<<mxGetN(mx_data)<<endl;
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const int m = mxGetM(mx_data);
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const int n = mxGetN(mx_data);
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// TODO: It should be possible to directly load the data into the sparse
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// matrix without going through the triplets
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// Copy data immediately
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double * pr = mxGetPr(mx_data);
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mwIndex * ir = mxGetIr(mx_data);
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mwIndex * jc = mxGetJc(mx_data);
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vector<Triplet<MT> > MIJV;
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MIJV.reserve(mxGetNumberOfElements(mx_data));
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// Iterate over outside
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int k = 0;
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for(int j=0; j<n;j++)
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{
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// Iterate over inside
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while(k<(int)jc[j+1])
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{
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//cout<<ir[k]<<" "<<j<<" "<<pr[k]<<endl;
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assert((int)ir[k]<m);
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assert((int)j<n);
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MIJV.push_back(Triplet<MT >(ir[k],j,pr[k]));
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k++;
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}
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}
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M.resize(m,n);
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M.setFromTriplets(MIJV.begin(),MIJV.end());
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}
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#ifdef IGL_STATIC_LIBRARY
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template void igl::matlab::parse_rhs_index<Eigen::Matrix<int, -1, 1, 0, -1, 1> >(mxArray_tag const**, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 1, 0, -1, 1> >&);
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template void igl::matlab::parse_rhs_index<Eigen::Matrix<int, -1, -1, 0, -1, -1> >(mxArray_tag const**, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&);
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template void igl::matlab::parse_rhs_double<Eigen::Matrix<double, -1, -1, 0, -1, -1> >(mxArray_tag const**, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> >&);
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template void igl::matlab::parse_rhs_index<Eigen::Matrix<int, -1, 3, 1, -1, 3> >(mxArray_tag const**, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 1, -1, 3> >&);
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template void igl::matlab::parse_rhs_double<Eigen::Matrix<double, -1, 3, 1, -1, 3> >(mxArray_tag const**, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 1, -1, 3> >&);
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#endif
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