Angus Kong | 0ae28bd | 2013-02-13 14:56:04 -0800 | [diff] [blame] | 1 | // Ceres Solver - A fast non-linear least squares minimizer |
Carlos Hernandez | 79397c2 | 2014-08-07 17:51:38 -0700 | [diff] [blame] | 2 | // Copyright 2014 Google Inc. All rights reserved. |
Angus Kong | 0ae28bd | 2013-02-13 14:56:04 -0800 | [diff] [blame] | 3 | // http://code.google.com/p/ceres-solver/ |
| 4 | // |
| 5 | // Redistribution and use in source and binary forms, with or without |
| 6 | // modification, are permitted provided that the following conditions are met: |
| 7 | // |
| 8 | // * Redistributions of source code must retain the above copyright notice, |
| 9 | // this list of conditions and the following disclaimer. |
| 10 | // * Redistributions in binary form must reproduce the above copyright notice, |
| 11 | // this list of conditions and the following disclaimer in the documentation |
| 12 | // and/or other materials provided with the distribution. |
| 13 | // * Neither the name of Google Inc. nor the names of its contributors may be |
| 14 | // used to endorse or promote products derived from this software without |
| 15 | // specific prior written permission. |
| 16 | // |
| 17 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 18 | // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 21 | // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 22 | // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 23 | // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 24 | // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 25 | // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 26 | // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 27 | // POSSIBILITY OF SUCH DAMAGE. |
| 28 | // |
| 29 | // Author: sameeragarwal@google.com (Sameer Agarwal) |
| 30 | |
| 31 | #include "gtest/gtest.h" |
| 32 | #include "ceres/autodiff_cost_function.h" |
| 33 | #include "ceres/linear_solver.h" |
| 34 | #include "ceres/ordered_groups.h" |
| 35 | #include "ceres/parameter_block.h" |
| 36 | #include "ceres/problem_impl.h" |
| 37 | #include "ceres/program.h" |
| 38 | #include "ceres/residual_block.h" |
| 39 | #include "ceres/solver_impl.h" |
| 40 | #include "ceres/sized_cost_function.h" |
| 41 | |
| 42 | namespace ceres { |
| 43 | namespace internal { |
| 44 | |
Angus Kong | 0ae28bd | 2013-02-13 14:56:04 -0800 | [diff] [blame] | 45 | // The parameters must be in separate blocks so that they can be individually |
| 46 | // set constant or not. |
| 47 | struct Quadratic4DCostFunction { |
| 48 | template <typename T> bool operator()(const T* const x, |
| 49 | const T* const y, |
| 50 | const T* const z, |
| 51 | const T* const w, |
| 52 | T* residual) const { |
| 53 | // A 4-dimension axis-aligned quadratic. |
| 54 | residual[0] = T(10.0) - *x + |
| 55 | T(20.0) - *y + |
| 56 | T(30.0) - *z + |
| 57 | T(40.0) - *w; |
| 58 | return true; |
| 59 | } |
| 60 | }; |
| 61 | |
| 62 | TEST(SolverImpl, ConstantParameterBlocksDoNotChangeAndStateInvariantKept) { |
| 63 | double x = 50.0; |
| 64 | double y = 50.0; |
| 65 | double z = 50.0; |
| 66 | double w = 50.0; |
| 67 | const double original_x = 50.0; |
| 68 | const double original_y = 50.0; |
| 69 | const double original_z = 50.0; |
| 70 | const double original_w = 50.0; |
| 71 | |
| 72 | scoped_ptr<CostFunction> cost_function( |
| 73 | new AutoDiffCostFunction<Quadratic4DCostFunction, 1, 1, 1, 1, 1>( |
| 74 | new Quadratic4DCostFunction)); |
| 75 | |
| 76 | Problem::Options problem_options; |
| 77 | problem_options.cost_function_ownership = DO_NOT_TAKE_OWNERSHIP; |
| 78 | |
| 79 | ProblemImpl problem(problem_options); |
| 80 | problem.AddResidualBlock(cost_function.get(), NULL, &x, &y, &z, &w); |
| 81 | problem.SetParameterBlockConstant(&x); |
| 82 | problem.SetParameterBlockConstant(&w); |
| 83 | |
| 84 | Solver::Options options; |
| 85 | options.linear_solver_type = DENSE_QR; |
| 86 | |
| 87 | Solver::Summary summary; |
| 88 | SolverImpl::Solve(options, &problem, &summary); |
| 89 | |
| 90 | // Verify only the non-constant parameters were mutated. |
| 91 | EXPECT_EQ(original_x, x); |
| 92 | EXPECT_NE(original_y, y); |
| 93 | EXPECT_NE(original_z, z); |
| 94 | EXPECT_EQ(original_w, w); |
| 95 | |
| 96 | // Check that the parameter block state pointers are pointing back at the |
| 97 | // user state, instead of inside a random temporary vector made by Solve(). |
| 98 | EXPECT_EQ(&x, problem.program().parameter_blocks()[0]->state()); |
| 99 | EXPECT_EQ(&y, problem.program().parameter_blocks()[1]->state()); |
| 100 | EXPECT_EQ(&z, problem.program().parameter_blocks()[2]->state()); |
| 101 | EXPECT_EQ(&w, problem.program().parameter_blocks()[3]->state()); |
Angus Kong | 0ae28bd | 2013-02-13 14:56:04 -0800 | [diff] [blame] | 102 | |
Carlos Hernandez | 79397c2 | 2014-08-07 17:51:38 -0700 | [diff] [blame] | 103 | EXPECT_TRUE(problem.program().IsValid()); |
Scott Ettinger | 399f7d0 | 2013-09-09 12:54:43 -0700 | [diff] [blame] | 104 | } |
| 105 | |
Angus Kong | 0ae28bd | 2013-02-13 14:56:04 -0800 | [diff] [blame] | 106 | } // namespace internal |
| 107 | } // namespace ceres |