mirror of
https://github.com/ceres-solver/ceres-solver.git
synced 2026-08-29 16:40:38 +08:00
Sergiu Deitsch
f90833f5fa
Currently, the logic for exporting symbols is rather complicated: when tests are enabled internal symbols are exported in addition to the public symbols. Such logic causes several problems. (1) Test binaries link against a Ceres build that is different from the final release since fewer optimizations are applied if more symbols are exported. (2) Also, some toolchains hide symbols by default breaking the existing logic eventually causing linker errors. Since internal symbols are not intended to be used outside of the project, we can compile them into object files and use exactly the same binary code both for the final build and the tests without relying on conditionals. By default, all symbols are now hidden unless annotated as public. Internal symbols are explicitly marked as not being exported in case users chose not to hide symbols by default. Change-Id: I589dd10be2f6f438508783cf99d141af0120057b
77 lines
3.4 KiB
C++
77 lines
3.4 KiB
C++
// Ceres Solver - A fast non-linear least squares minimizer
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// Copyright 2019 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: tbennun@gmail.com (Tal Ben-Nun)
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//
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#ifndef CERES_PUBLIC_NUMERIC_DIFF_OPTIONS_H_
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#define CERES_PUBLIC_NUMERIC_DIFF_OPTIONS_H_
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#include "ceres/internal/disable_warnings.h"
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#include "ceres/internal/export.h"
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namespace ceres {
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// Options pertaining to numeric differentiation (e.g., convergence criteria,
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// step sizes).
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struct CERES_EXPORT NumericDiffOptions {
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// Numeric differentiation step size (multiplied by parameter block's
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// order of magnitude). If parameters are close to zero, the step size
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// is set to sqrt(machine_epsilon).
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double relative_step_size = 1e-6;
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// Initial step size for Ridders adaptive numeric differentiation (multiplied
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// by parameter block's order of magnitude).
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// If parameters are close to zero, Ridders' method sets the step size
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// directly to this value. This parameter is separate from
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// "relative_step_size" in order to set a different default value.
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//
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// Note: For Ridders' method to converge, the step size should be initialized
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// to a value that is large enough to produce a significant change in the
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// function. As the derivative is estimated, the step size decreases.
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double ridders_relative_initial_step_size = 1e-2;
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// Maximal number of adaptive extrapolations (sampling) in Ridders' method.
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int max_num_ridders_extrapolations = 10;
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// Convergence criterion on extrapolation error for Ridders adaptive
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// differentiation. The available error estimation methods are defined in
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// NumericDiffErrorType and set in the "ridders_error_method" field.
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double ridders_epsilon = 1e-12;
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// The factor in which to shrink the step size with each extrapolation in
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// Ridders' method.
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double ridders_step_shrink_factor = 2.0;
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};
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} // namespace ceres
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#include "ceres/internal/reenable_warnings.h"
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#endif // CERES_PUBLIC_NUMERIC_DIFF_OPTIONS_H_
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