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Diffstat (limited to 'extern/ceres/internal/ceres/is_close.h')
| -rw-r--r-- | extern/ceres/internal/ceres/is_close.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/extern/ceres/internal/ceres/is_close.h b/extern/ceres/internal/ceres/is_close.h new file mode 100644 index 00000000000..7789448c8e8 --- /dev/null +++ b/extern/ceres/internal/ceres/is_close.h @@ -0,0 +1,51 @@ +// Ceres Solver - A fast non-linear least squares minimizer +// Copyright 2016 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. +// +// Authors: keir@google.com (Keir Mierle), dgossow@google.com (David Gossow) +// +// Utility routine for comparing two values. + +#ifndef CERES_INTERNAL_IS_CLOSE_H_ +#define CERES_INTERNAL_IS_CLOSE_H_ + +namespace ceres { +namespace internal { +// Returns true if x and y have a relative (unsigned) difference less than +// relative_precision and false otherwise. Stores the relative and absolute +// difference in relative/absolute_error if non-NULL. If one of the two values +// is exactly zero, the absolute difference will be compared, and relative_error +// will be set to the absolute difference. +bool IsClose(double x, + double y, + double relative_precision, + double *relative_error, + double *absolute_error); +} // namespace internal +} // namespace ceres + +#endif // CERES_INTERNAL_IS_CLOSE_H_ |