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Diffstat (limited to 'internal/ceres/block_structure.cc')
-rw-r--r-- | internal/ceres/block_structure.cc | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/internal/ceres/block_structure.cc b/internal/ceres/block_structure.cc new file mode 100644 index 0000000..e611311 --- /dev/null +++ b/internal/ceres/block_structure.cc @@ -0,0 +1,92 @@ +// Ceres Solver - A fast non-linear least squares minimizer +// Copyright 2010, 2011, 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) + +#include "ceres/block_structure.h" +#include "ceres/matrix_proto.h" + +namespace ceres { +namespace internal { + +bool CellLessThan(const Cell& lhs, const Cell& rhs) { + return (lhs.block_id < rhs.block_id); +} + +#ifndef CERES_NO_PROTOCOL_BUFFERS +void ProtoToBlockStructure(const BlockStructureProto &proto, + CompressedRowBlockStructure *block_structure) { + // Decode the column blocks. + block_structure->cols.resize(proto.cols_size()); + for (int i = 0; i < proto.cols_size(); ++i) { + block_structure->cols[i].size = proto.cols(i).size(); + block_structure->cols[i].position = + proto.cols(i).position(); + } + // Decode the row structure. + block_structure->rows.resize(proto.rows_size()); + for (int i = 0; i < proto.rows_size(); ++i) { + const CompressedRowProto &row = proto.rows(i); + block_structure->rows[i].block.size = row.block().size(); + block_structure->rows[i].block.position = row.block().position(); + + // Copy the cells within the row. + block_structure->rows[i].cells.resize(row.cells_size()); + for (int j = 0; j < row.cells_size(); ++j) { + const CellProto &cell = row.cells(j); + block_structure->rows[i].cells[j].block_id = cell.block_id(); + block_structure->rows[i].cells[j].position = cell.position(); + } + } +} + +void BlockStructureToProto(const CompressedRowBlockStructure &block_structure, + BlockStructureProto *proto) { + // Encode the column blocks. + for (int i = 0; i < block_structure.cols.size(); ++i) { + BlockProto *block = proto->add_cols(); + block->set_size(block_structure.cols[i].size); + block->set_position(block_structure.cols[i].position); + } + // Encode the row structure. + for (int i = 0; i < block_structure.rows.size(); ++i) { + CompressedRowProto *row = proto->add_rows(); + BlockProto *block = row->mutable_block(); + block->set_size(block_structure.rows[i].block.size); + block->set_position(block_structure.rows[i].block.position); + for (int j = 0; j < block_structure.rows[i].cells.size(); ++j) { + CellProto *cell = row->add_cells(); + cell->set_block_id(block_structure.rows[i].cells[j].block_id); + cell->set_position(block_structure.rows[i].cells[j].position); + } + } +} +#endif + +} // namespace internal +} // namespace ceres |