| // 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_ |
