74 lines
2.8 KiB
C++
74 lines
2.8 KiB
C++
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// Ceres Solver - A fast non-linear least squares minimizer
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// Copyright 2015 Google Inc. All rights reserved.
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// http://ceres-solver.org/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of Google Inc. nor the names of its contributors may be
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// Author: sameeragarwal@google.com (Sameer Agarwal)
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#include "ceres/preconditioner.h"
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#include "glog/logging.h"
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namespace ceres {
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namespace internal {
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Preconditioner::~Preconditioner() {
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}
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PreconditionerType Preconditioner::PreconditionerForZeroEBlocks(
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PreconditionerType preconditioner_type) {
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if (preconditioner_type == SCHUR_JACOBI ||
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preconditioner_type == CLUSTER_JACOBI ||
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preconditioner_type == CLUSTER_TRIDIAGONAL) {
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return JACOBI;
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}
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return preconditioner_type;
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}
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SparseMatrixPreconditionerWrapper::SparseMatrixPreconditionerWrapper(
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const SparseMatrix* matrix)
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: matrix_(CHECK_NOTNULL(matrix)) {
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}
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SparseMatrixPreconditionerWrapper::~SparseMatrixPreconditionerWrapper() {
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}
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bool SparseMatrixPreconditionerWrapper::UpdateImpl(const SparseMatrix& A,
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const double* D) {
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return true;
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}
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void SparseMatrixPreconditionerWrapper::RightMultiply(const double* x,
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double* y) const {
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matrix_->RightMultiply(x, y);
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}
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int SparseMatrixPreconditionerWrapper::num_rows() const {
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return matrix_->num_rows();
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}
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} // namespace internal
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} // namespace ceres
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