1 // Ceres Solver - A fast non-linear least squares minimizer
2 // Copyright 2015 Google Inc. All rights reserved.
3 // http://ceres-solver.org/
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6 // modification, are permitted provided that the following conditions are met:
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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
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17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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29 // Author: keir@google.com (Keir Mierle)
31 // A scratch evaluate preparer provides temporary storage for the jacobians that
32 // are created when running user-provided cost functions. The evaluator takes
33 // care to avoid evaluating the jacobian for fixed parameters.
35 #ifndef CERES_INTERNAL_SCRATCH_EVALUATE_PREPARER_H_
36 #define CERES_INTERNAL_SCRATCH_EVALUATE_PREPARER_H_
38 #include "ceres/internal/scoped_ptr.h"
47 class ScratchEvaluatePreparer {
49 // Create num_threads ScratchEvaluatePreparers.
50 static ScratchEvaluatePreparer* Create(const Program &program,
53 // EvaluatePreparer interface
54 void Init(int max_derivatives_per_residual_block);
55 void Prepare(const ResidualBlock* residual_block,
56 int residual_block_index,
57 SparseMatrix* jacobian,
61 // Scratch space for the jacobians; each jacobian is packed one after another.
62 // There is enough scratch to hold all the jacobians for the largest residual.
63 scoped_array<double> jacobian_scratch_;
66 } // namespace internal
69 #endif // CERES_INTERNAL_SCRATCH_EVALUATE_PREPARER_H_