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Diffstat (limited to 'internal/ceres/line_search_direction.h')
-rw-r--r-- | internal/ceres/line_search_direction.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/internal/ceres/line_search_direction.h b/internal/ceres/line_search_direction.h new file mode 100644 index 0000000..0857cb0 --- /dev/null +++ b/internal/ceres/line_search_direction.h @@ -0,0 +1,75 @@ +// 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_INTERNAL_LINE_SEARCH_DIRECTION_H_ +#define CERES_INTERNAL_LINE_SEARCH_DIRECTION_H_ + +#ifndef CERES_NO_LINE_SEARCH_MINIMIZER + +#include "ceres/internal/eigen.h" +#include "ceres/line_search_minimizer.h" +#include "ceres/types.h" + +namespace ceres { +namespace internal { + +class LineSearchDirection { + public: + struct Options { + Options() + : num_parameters(0), + type(LBFGS), + nonlinear_conjugate_gradient_type(FLETCHER_REEVES), + function_tolerance(1e-12), + max_lbfgs_rank(20), + use_approximate_eigenvalue_bfgs_scaling(true) { + } + + int num_parameters; + LineSearchDirectionType type; + NonlinearConjugateGradientType nonlinear_conjugate_gradient_type; + double function_tolerance; + int max_lbfgs_rank; + bool use_approximate_eigenvalue_bfgs_scaling; + }; + + static LineSearchDirection* Create(const Options& options); + + virtual ~LineSearchDirection() {} + virtual bool NextDirection(const LineSearchMinimizer::State& previous, + const LineSearchMinimizer::State& current, + Vector* search_direction) = 0; +}; + +} // namespace internal +} // namespace ceres + +#endif // CERES_NO_LINE_SEARCH_MINIMIZER +#endif // CERES_INTERNAL_LINE_SEARCH_DIRECTION_H_ |