mirror of
https://github.com/ceres-solver/ceres-solver.git
synced 2026-08-30 00:50:37 +08:00
62 lines
2.3 KiB
C++
62 lines
2.3 KiB
C++
|
// Ceres Solver - A fast non-linear least squares minimizer
|
||
|
|
// Copyright 2017 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)
|
||
|
|
|
||
|
|
#ifndef CERES_INTERNAL_FUNCTION_SAMPLE_H_
|
||
|
|
#define CERES_INTERNAL_FUNCTION_SAMPLE_H_
|
||
|
|
|
||
|
|
#include <string>
|
||
|
|
|
||
|
|
namespace ceres {
|
||
|
|
namespace internal {
|
||
|
|
|
||
|
|
// Clients can use this struct to communicate the value of the
|
||
|
|
// function and or its gradient at a given point x.
|
||
|
|
struct FunctionSample {
|
||
|
|
FunctionSample()
|
||
|
|
: x(0.0),
|
||
|
|
value(0.0),
|
||
|
|
value_is_valid(false),
|
||
|
|
gradient(0.0),
|
||
|
|
gradient_is_valid(false) {
|
||
|
|
}
|
||
|
|
std::string ToDebugString() const;
|
||
|
|
|
||
|
|
double x;
|
||
|
|
double value; // value = f(x)
|
||
|
|
bool value_is_valid;
|
||
|
|
double gradient; // gradient = f'(x)
|
||
|
|
bool gradient_is_valid;
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace internal
|
||
|
|
} // namespace ceres
|
||
|
|
|
||
|
|
#endif // CERES_INTERNAL_FUNCTION_SAMPLE_H_
|