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Diffstat (limited to 'include/ceres/crs_matrix.h')
| -rw-r--r-- | include/ceres/crs_matrix.h | 65 |
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diff --git a/include/ceres/crs_matrix.h b/include/ceres/crs_matrix.h new file mode 100644 index 0000000..c9fe8f7 --- /dev/null +++ b/include/ceres/crs_matrix.h @@ -0,0 +1,65 @@ +// Ceres Solver - A fast non-linear least squares minimizer +// Copyright 2012 Google Inc. All rights reserved. +// http://code.google.com/p/ceres-solver/ +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are met: +// +// * Redistributions of source code must retain the above copyright notice, +// this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above copyright notice, +// this list of conditions and the following disclaimer in the documentation +// and/or other materials provided with the distribution. +// * Neither the name of Google Inc. nor the names of its contributors may be +// used to endorse or promote products derived from this software without +// specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE +// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +// POSSIBILITY OF SUCH DAMAGE. +// +// Author: sameeragarwal@google.com (Sameer Agarwal) + +#ifndef CERES_PUBLIC_CRS_MATRIX_H_ +#define CERES_PUBLIC_CRS_MATRIX_H_ + +#include <vector> +#include "ceres/internal/port.h" + +namespace ceres { + +// A compressed row sparse matrix used primarily for communicating the +// Jacobian matrix to the user. +struct CRSMatrix { + CRSMatrix() : num_rows(0), num_cols(0) {} + + int num_rows; + int num_cols; + + // A compressed row matrix stores its contents in three arrays. + // The non-zero pattern of the i^th row is given by + // + // rows[cols[i] ... cols[i + 1]] + // + // and the corresponding values by + // + // values[cols[i] ... cols[i + 1]] + // + // Thus, cols is a vector of size num_cols + 1, and rows and values + // have as many entries as number of non-zeros in the matrix. + vector<int> cols; + vector<int> rows; + vector<double> values; +}; + +} // namespace ceres + +#endif // CERES_PUBLIC_CRS_MATRIX_H_ |