// Copyright (c) 2006-2009 Max-Planck-Institute Saarbruecken (Germany). // All rights reserved. // // This file is part of CGAL (www.cgal.org) // // $URL: https://github.com/CGAL/cgal/blob/v5.1/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/flags.h $ // $Id: flags.h 0779373 2020-03-26T13:31:46+01:00 Sébastien Loriot // SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial // // // Author(s) : Michael Kerber // // ============================================================================ #ifndef CGAL_ACK_FLAGS_H #define CGAL_ACK_FLAGS_H 1 // TODO: use new interface and remove this flag #ifndef CGAL_AK_ENABLE_DEPRECATED_INTERFACE #define CGAL_AK_ENABLE_DEPRECATED_INTERFACE 0 #endif // Is debug-information printed? #ifndef CGAL_ACK_DEBUG_FLAG #define CGAL_ACK_DEBUG_FLAG 0 #endif // If CGAL_ACK_DEBUG_FLAG is set, which output stream is used for debug? #ifndef CGAL_ACK_DEBUG_PRINT #define CGAL_ACK_DEBUG_PRINT std::cout #endif // If enabled, needs includes from experimental package #ifndef CGAL_ACK_WITH_FILTERED_KERNEL #define CGAL_ACK_WITH_FILTERED_KERNEL 0 #endif // If enabled, needs includes from experimental package #ifndef CGAL_ACK_WITH_ROTATIONS #define CGAL_ACK_WITH_ROTATIONS 0 #endif /** * The threshold that is used in the Filtered_algebraic_curve_kernel_2 */ #ifndef CGAL_ACK_THRESHOLD_FOR_FILTERED_KERNEL #define CGAL_ACK_THRESHOLD_FOR_FILTERED_KERNEL 0.01 #endif /** * For random choices in the algorithm, this seed is used * If set to zero, a random seed is used */ #ifndef CGAL_ACK_STATIC_SEED #define CGAL_ACK_STATIC_SEED 0 #endif /** * Allows to use the Bitstream tree described in Eigenwillig's thesis */ #ifndef CGAL_ACK_BITSTREAM_USES_E08_TREE #define CGAL_ACK_BITSTREAM_USES_E08_TREE 1 #endif /** * If set, the program uses the AlciX-code * for the curve- and curve-pair-analysis. * This flag is only for debugging purposes. */ #ifndef CGAL_ACK_USE_EXACUS #define CGAL_ACK_USE_EXACUS 0 #endif /** * If set, the curve and curve pair analysis are using specialized code * to analyse conic curves, i.e. curves of degree 2 */ #ifndef CGAL_ACK_USE_SPECIAL_TREATMENT_FOR_CONIX #define CGAL_ACK_USE_SPECIAL_TREATMENT_FOR_CONIX 0 #endif /** * The curve analysis does not distinguish between "(1,1)-singularities" * (i.e., vertical cusps, isolated points on arcs), and usual regular points. * The candidate point on each status line can be checked for being singular * using this flag. This gives additional information but increases * compuation time * * WARNING: Currently, the status line does not store the additional * information whether a point is singluar or not. * Therefore, there is currently no reasons to set this flag. It is still * contained for possible further extension of the status line. */ #ifndef CGAL_ACK_CHECK_CANDIDATE_FOR_SINGULARITY #define CGAL_ACK_CHECK_CANDIDATE_FOR_SINGULARITY 0 #endif /** * If set to 1, curve pairs are not checked for coprimality. Only do this * if you know what you are doing! */ #ifndef CGAL_ACK_DONT_CHECK_POLYNOMIALS_FOR_COPRIMALITY #define CGAL_ACK_DONT_CHECK_POLYNOMIALS_FOR_COPRIMALITY 0 #endif /** * The "resultant first" strategy means: instead of computing the full * subresultant sequence (or Sturm-Habicht sequence), the algorithm * only computed the resultant in a first step. This suffices already for * many curves (i.e., regular ones). The full subresultant is computed * if it is needed for the first time. * * This strategy only makes sense if computing resultants is faster than * computing subresultants, otherwise, it wastes computation time. * Since resultant computation is done by interpolation, * it is faster than the pseudo-remainder based subresultant computation. */ #ifndef CGAL_ACK_RESULTANT_FIRST_STRATEGY #define CGAL_ACK_RESULTANT_FIRST_STRATEGY 1 #endif /** * If CGAL_ACK_RESULTANT_FIRST_STRATEGY is set, this flag determines * for which curves the "resultant first" strategy is used. Depending * on the resultant algorithm, the strategy might only be advantageous * for higher degree curves * * If CGAL_ACK_RESULTANT_FIRST_STRATEGY is not set, this flag has no effect */ #ifndef CGAL_ACK_RESULTANT_FIRST_STRATEGY_DEGREE_THRESHOLD #define CGAL_ACK_RESULTANT_FIRST_STRATEGY_DEGREE_THRESHOLD 0 #endif /** * Subresultants can be computed by a polynomial remainder sequence (default), * or by evaluating minors of the bezout matrix by setting this flag. * Tests have shown that the polynomial remainder sequence is more efficient * so it is not recommended to set this flag. */ #ifndef CGAL_ACK_USE_BEZOUT_MATRIX_FOR_SUBRESULTANTS #define CGAL_ACK_USE_BEZOUT_MATRIX_FOR_SUBRESULTANTS 0 #endif /** * Allows to switch off the specialized method for Status_line_CPA_1 * if multiplicity is zero or one. * Since this methods improves the performance, * it is not recommended to set this flag unless for testing */ #ifndef ACK_CGAL_NO_ARC_FLIP #define ACK_CGAL_NO_ARC_FLIP 0 #endif /** * This flags defines the default strategy to handle degenerate curves * There are three choices currently available: * SHEAR_STRATEGY performs a shear whenever a degenerate situation occurs. * SHEAR_ONLY_AT_IRRATIONAL_STRATEGY handles rational coordinates with * a more direct method, but performs a shear for irrational x-coordinates * that have a degeneracy. Finally, EXCEPTION_STRATEGY throws an exception * whenever a degeneracy occurs. */ #ifndef CGAL_ACK_DEFAULT_DEGENERACY_STRATEGY //#define CGAL_ACK_DEFAULT_DEGENERACY_STRATEGY CGAL::SHEAR_ONLY_AT_IRRATIONAL_STRATEGY #define CGAL_ACK_DEFAULT_DEGENERACY_STRATEGY CGAL::SHEAR_STRATEGY #endif /** * The algorithm can also handle non-y-regular curves without shearing, * in case that the resultant multiplicity at vertical asymptotes is one. * This special treatement can be switched off by setting this flag. * It is not recommended to do this because of efficiency */ #ifndef CGAL_ACK_SHEAR_ALL_NOT_Y_REGULAR_CURVES #define CGAL_ACK_SHEAR_ALL_NOT_Y_REGULAR_CURVES 0 #endif /** * At some points in the algorithm, it is checked whether a polynomial * H(x):=h(p(x),q(x)) vanishes for an algebraic number x_0 with polynomial r. * For that check, the computation of H is done modulo r for efficiency. * This can be switched off by this flag, though it is recommended not to * do so. */ #ifndef CGAL_ACK_USE_NO_REDUCTION_MODULO_RESULTANT #define CGAL_ACK_USE_NO_REDUCTION_MODULO_RESULTANT 0 #endif #ifndef CGAL_AK_DONT_USE_SIMPLE_BOUND_BETWEEN #define CGAL_AK_DONT_USE_SIMPLE_BOUND_BETWEEN 0 #endif /** * These flags are experimental, concerning interval arithmetic methods * Don't change them! */ #ifndef CGAL_ACK_USE_DERIVATIVE_OPTION #define CGAL_ACK_USE_DERIVATIVE_OPTION 0 #endif #ifndef CGAL_ACK_USE_BISECTION_OPTION #define CGAL_ACK_USE_BISECTION_OPTION 0 #endif #endif // CGAL_ACK_FLAGS_H