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author | Lukas Tönne <lukas.toenne@gmail.com> | 2016-04-20 17:45:29 +0300 |
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committer | Lukas Tönne <lukas.toenne@gmail.com> | 2016-04-20 17:45:29 +0300 |
commit | aae0598aa233d43d0ffc81a070b2ce20d6871c1d (patch) | |
tree | 378100f45cf1db972c671a6886496a5604f7ab29 /extern/ceres/internal/ceres/gradient_problem.cc | |
parent | 95d7d3c2a6aa91f1dcb33ff0cdfc751e2886d8cd (diff) | |
parent | d7e4f920fd93a4ae5679e0eb6b228a349ab3b082 (diff) |
Merge branch 'master' into temp_depsgraph_split_ubereval
Diffstat (limited to 'extern/ceres/internal/ceres/gradient_problem.cc')
-rw-r--r-- | extern/ceres/internal/ceres/gradient_problem.cc | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/extern/ceres/internal/ceres/gradient_problem.cc b/extern/ceres/internal/ceres/gradient_problem.cc new file mode 100644 index 00000000000..4ebd3e60610 --- /dev/null +++ b/extern/ceres/internal/ceres/gradient_problem.cc @@ -0,0 +1,81 @@ +// Ceres Solver - A fast non-linear least squares minimizer +// Copyright 2015 Google Inc. All rights reserved. +// http://ceres-solver.org/ +// +// 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/gradient_problem.h" +#include "ceres/local_parameterization.h" +#include "glog/logging.h" + +namespace ceres { + +GradientProblem::GradientProblem(FirstOrderFunction* function) + : function_(function), + parameterization_( + new IdentityParameterization(function_->NumParameters())), + scratch_(new double[function_->NumParameters()]) { +} + +GradientProblem::GradientProblem(FirstOrderFunction* function, + LocalParameterization* parameterization) + : function_(function), + parameterization_(parameterization), + scratch_(new double[function_->NumParameters()]) { + CHECK_EQ(function_->NumParameters(), parameterization_->GlobalSize()); +} + +int GradientProblem::NumParameters() const { + return function_->NumParameters(); +} + +int GradientProblem::NumLocalParameters() const { + return parameterization_->LocalSize(); +} + + +bool GradientProblem::Evaluate(const double* parameters, + double* cost, + double* gradient) const { + if (gradient == NULL) { + return function_->Evaluate(parameters, cost, NULL); + } + + return (function_->Evaluate(parameters, cost, scratch_.get()) && + parameterization_->MultiplyByJacobian(parameters, + 1, + scratch_.get(), + gradient)); +} + +bool GradientProblem::Plus(const double* x, + const double* delta, + double* x_plus_delta) const { + return parameterization_->Plus(x, delta, x_plus_delta); +} + +} // namespace ceres |