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Diffstat (limited to 'extern/libmv/third_party/ceres/internal/ceres/block_jacobi_preconditioner.cc')
-rw-r--r-- | extern/libmv/third_party/ceres/internal/ceres/block_jacobi_preconditioner.cc | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/extern/libmv/third_party/ceres/internal/ceres/block_jacobi_preconditioner.cc b/extern/libmv/third_party/ceres/internal/ceres/block_jacobi_preconditioner.cc deleted file mode 100644 index 7f79a4f993d..00000000000 --- a/extern/libmv/third_party/ceres/internal/ceres/block_jacobi_preconditioner.cc +++ /dev/null @@ -1,106 +0,0 @@ -// 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: keir@google.com (Keir Mierle) - -#include "ceres/block_jacobi_preconditioner.h" - -#include "ceres/block_sparse_matrix.h" -#include "ceres/block_structure.h" -#include "ceres/block_random_access_diagonal_matrix.h" -#include "ceres/casts.h" -#include "ceres/integral_types.h" -#include "ceres/internal/eigen.h" - -namespace ceres { -namespace internal { - -BlockJacobiPreconditioner::BlockJacobiPreconditioner( - const BlockSparseMatrix& A) { - const CompressedRowBlockStructure* bs = A.block_structure(); - vector<int> blocks(bs->cols.size()); - for (int i = 0; i < blocks.size(); ++i) { - blocks[i] = bs->cols[i].size; - } - - m_.reset(new BlockRandomAccessDiagonalMatrix(blocks)); -} - -BlockJacobiPreconditioner::~BlockJacobiPreconditioner() {} - -bool BlockJacobiPreconditioner::UpdateImpl(const BlockSparseMatrix& A, - const double* D) { - const CompressedRowBlockStructure* bs = A.block_structure(); - const double* values = A.values(); - m_->SetZero(); - for (int i = 0; i < bs->rows.size(); ++i) { - const int row_block_size = bs->rows[i].block.size; - const vector<Cell>& cells = bs->rows[i].cells; - for (int j = 0; j < cells.size(); ++j) { - const int block_id = cells[j].block_id; - const int col_block_size = bs->cols[block_id].size; - - int r, c, row_stride, col_stride; - CellInfo* cell_info = m_->GetCell(block_id, block_id, - &r, &c, - &row_stride, &col_stride); - MatrixRef m(cell_info->values, row_stride, col_stride); - ConstMatrixRef b(values + cells[j].position, - row_block_size, - col_block_size); - m.block(r, c, col_block_size, col_block_size) += b.transpose() * b; - } - } - - if (D != NULL) { - // Add the diagonal. - int position = 0; - for (int i = 0; i < bs->cols.size(); ++i) { - const int block_size = bs->cols[i].size; - int r, c, row_stride, col_stride; - CellInfo* cell_info = m_->GetCell(i, i, - &r, &c, - &row_stride, &col_stride); - MatrixRef m(cell_info->values, row_stride, col_stride); - m.block(r, c, block_size, block_size).diagonal() += - ConstVectorRef(D + position, block_size).array().square().matrix(); - position += block_size; - } - } - - m_->Invert(); - return true; -} - -void BlockJacobiPreconditioner::RightMultiply(const double* x, - double* y) const { - m_->RightMultiply(x, y); -} - -} // namespace internal -} // namespace ceres |