1 // Ceres Solver - A fast non-linear least squares minimizer 2 // Copyright 2012 Google Inc. All rights reserved. 3 // http://code.google.com/p/ceres-solver/ 4 // 5 // Redistribution and use in source and binary forms, with or without 6 // modification, are permitted provided that the following conditions are met: 7 // 8 // * Redistributions of source code must retain the above copyright notice, 9 // this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above copyright notice, 11 // this list of conditions and the following disclaimer in the documentation 12 // and/or other materials provided with the distribution. 13 // * Neither the name of Google Inc. nor the names of its contributors may be 14 // used to endorse or promote products derived from this software without 15 // specific prior written permission. 16 // 17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18 // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 21 // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 // POSSIBILITY OF SUCH DAMAGE. 28 // 29 // Author: sameeragarwal (at) google.com (Sameer Agarwal) 30 31 #ifndef CERES_PUBLIC_CRS_MATRIX_H_ 32 #define CERES_PUBLIC_CRS_MATRIX_H_ 33 34 #include <vector> 35 #include "ceres/internal/port.h" 36 37 namespace ceres { 38 39 // A compressed row sparse matrix used primarily for communicating the 40 // Jacobian matrix to the user. 41 struct CRSMatrix { 42 CRSMatrix() : num_rows(0), num_cols(0) {} 43 44 int num_rows; 45 int num_cols; 46 47 // A compressed row matrix stores its contents in three arrays. 48 // The non-zero pattern of the i^th row is given by 49 // 50 // rows[cols[i] ... cols[i + 1]] 51 // 52 // and the corresponding values by 53 // 54 // values[cols[i] ... cols[i + 1]] 55 // 56 // Thus, cols is a vector of size num_cols + 1, and rows and values 57 // have as many entries as number of non-zeros in the matrix. 58 vector<int> cols; 59 vector<int> rows; 60 vector<double> values; 61 }; 62 63 } // namespace ceres 64 65 #endif // CERES_PUBLIC_CRS_MATRIX_H_ 66
