10ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// Ceres Solver - A fast non-linear least squares minimizer 20ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// Copyright 2010, 2011, 2012 Google Inc. All rights reserved. 30ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// http://code.google.com/p/ceres-solver/ 40ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// 50ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// Redistribution and use in source and binary forms, with or without 60ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// modification, are permitted provided that the following conditions are met: 70ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// 80ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// * Redistributions of source code must retain the above copyright notice, 90ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// this list of conditions and the following disclaimer. 100ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// * Redistributions in binary form must reproduce the above copyright notice, 110ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// this list of conditions and the following disclaimer in the documentation 120ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// and/or other materials provided with the distribution. 130ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// * Neither the name of Google Inc. nor the names of its contributors may be 140ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// used to endorse or promote products derived from this software without 150ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// specific prior written permission. 160ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// 170ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 180ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 190ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 200ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 210ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 220ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 230ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 240ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 250ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 260ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 270ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// POSSIBILITY OF SUCH DAMAGE. 280ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// 290ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// Author: sameeragarwal@google.com (Sameer Agarwal) 300ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong 310ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong#ifndef CERES_INTERNAL_DETECT_STRUCTURE_H_ 320ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong#define CERES_INTERNAL_DETECT_STRUCTURE_H_ 330ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong 340ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong#include "ceres/block_structure.h" 350ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong 360ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kongnamespace ceres { 370ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kongnamespace internal { 380ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong 390ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// Detect static blocks in the problem sparsity. For rows containing 400ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// e_blocks, we are interested in detecting if the size of the row 410ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// blocks, e_blocks and the f_blocks remain constant. If they do, then 420ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// we can use template specialization to improve the performance of 430ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// the block level linear algebra operations used by the 440ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// SchurEliminator. 450ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// 460ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// If a block size is not constant, we return Eigen::Dynamic as the 470ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// value. This just means that the eliminator uses dynamically sized 480ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// linear algebra operations rather than static operations whose size 490ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// is known as compile time. 500ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// 510ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// For more details about e_blocks and f_blocks, see 520ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// schur_eliminator.h. This information is used to initialized an 530ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// appropriate template specialization of SchurEliminator. 540ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kongvoid DetectStructure(const CompressedRowBlockStructure& bs, 550ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong const int num_eliminate_blocks, 560ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong int* row_block_size, 570ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong int* e_block_size, 580ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong int* f_block_size); 590ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong 600ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong} // namespace internal 610ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong} // namespace ceres 620ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong 630ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong#endif // CERES_INTERNAL_DETECT_STRUCTURE_H_ 64