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Proposal of the announcement mail for CGAL-4.11-beta1
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Laurent Rineau
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Subject: CGAL 4.10 Beta 1 Released, Computational Geometry Algorithms Library
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Subject: CGAL 4.11 Beta 1 Released, Computational Geometry Algorithms Library
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Content-Type: text/plain; charset="utf-8"
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Content-Type: text/plain; charset="utf-8"
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Body:
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Body:
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The CGAL Open Source Project is pleased to announce the release 4.10 Beta 1
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The CGAL Open Source Project is pleased to announce the release 4.11 Beta 1
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of CGAL, the Computational Geometry Algorithms Library.
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of CGAL, the Computational Geometry Algorithms Library.
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CGAL version 4.10 Beta 1 is a public testing release. It should provide
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CGAL version 4.11 Beta 1 is a public testing release. It should provide
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a solid ground to report bugs that need to be tackled before the
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a solid ground to report bugs that need to be tackled before the
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release of the final version of CGAL 4.10 in May.
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release of the final version of CGAL 4.11 in September.
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This release is pretty special by its number of breaking changes in the
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API. In order to have a better feature set, or a better API, several
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packages have been reworked in a way that breaks the back-compatibility
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with the previous versions of the API.
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Besides fixes and general enhancement to existing packages, the following
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Besides fixes and general enhancement to existing packages, the following
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has changed since CGAL 4.9:
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has changed since CGAL 4.10:
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* Installation
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* 3D Periodic Regular Triangulations (new feature)
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- The minimum required version of CMake is now 3.1. All CMake versions up to
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- Added the class Periodic_3_regular_triangulation_3, which provides
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3.7 are supported.
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functionality for 3D periodic weighted Delaunay triangulations. The
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construction is fully dynamic: it provides both point insertion and
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vertex removal.
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* Generalized Maps (new package)
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* dD Regular Triangulations (new feature)
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- This package implements Generalized Maps in d dimensions. A generalized map
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- Added the class Regular_triangulation, which provides functionality for
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is a data structure enabling to represent an orientable or non orientable
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dD weighted Delaunay triangulations. Note that the removal of points is
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subdivided object by describing all the cells of the subdivision (for
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not yet supported.
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example in 3D vertices, edges, faces, volumes) and all the incidence and
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adjacency relationships between these cells. This data structure is the
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generalization of the combinatorial maps in order to be able to represent
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non orientable objects.
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* 3D Point Set (new package)
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* 2D and 3D Linear Geometry Kernel (breaking change)
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- This package provides a flexible data structure CGAL::Point_set_3 that
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- Breaking change: The dangerous implicit conversions between weighted
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allows the user to easily handle point sets with an arbitrary number of
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points and points in the concept Kernel have been
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attributes (such as normal vectors, colors, labeling, etc.).
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disabled. Constructors offering to build a weighted point from a point
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(and reversely) are still requested by the concept Kernel but must now
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be marked with the explicit specifier.
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- Breaking change: The removal of implicit conversions between points and
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weighted points in the concept Kernel has incidentally created various
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minor breaking changes in the following packages: 2D Alpha Shapes, 2D
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and 3D Triangulations, and 3D Mesh Generation. See the full changelog
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for details.
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Note also that the advanced API of a few CGAL packages have change in an
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* Triangulated Surface Mesh Parameterization (breaking change)
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incompatible way:
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- Triangulated Surface Mesh Shortest Paths
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- CGAL and the Boost Graph Library (BGL)
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- 2D and 3D Linear Geometry Kernel
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- 2D Triangulations
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- 3D Triangulations
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See http://www.cgal.org/2017/04/20/cgal410-beta1/ for a complete list of
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- Breaking change: The package has been rewritten and can operate on any
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changes. Breaking changes are highlighted with a bold "Breaking change".
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model of the MutableFaceGraph concept. All previous parameterization
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methods are still offered, although with a different, simpler API. The
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documentation has been updated and offers a gentle introduction to the
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new API. Users who wish to use the former API must use a version prior
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to 4.11.
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- Breaking change: The adapter to add virtual seams is now the class
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CGAL::Seam_mesh in the package CGAL and the BGL.
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- Breaking change: The package has been restructured and most headers
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have been moved. In a general manner, users should replace <CGAL/XXX.h>
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with <CGAL/Surface_mesh_parameterization/XXX.h>
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- Add the As Rigid As Possible Parameterization method. This
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parameterization allows the user to prioritize angle preservation,
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shape preservation, or a balance of both.
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- Add the Orbifold Tutte Embedding method. This parameterization method
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allows to parameterize meshes that are topological spheres.
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* 3D Surface Subdivision Methods (breaking changes)
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- The subdivision algorithms now work on any model of a
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MutableFaceGraph. A new API to the subdivision methods is offered,
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which uses optional named parameters to pass the number of iterations
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and a vertex property map.
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- Breaking change: Removed the headers <CGAL/Subdivision_method_3.h> and
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<CGAL/Subdivision_mask_3.h>. The headers <CGAL/Subdivision_method_3/
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subdivision_methods_3.h> and <CGAL/Subdivision_method_3/
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subdivision_masks_3.h> should respectively be used instead.
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- Sqrt3 subdivision can now handle input surfaces with a border.
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* Scale-Space Surface Reconstruction (breaking change)
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- Breaking change: the API was rewritten to separate the smoothing and
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meshing algorithm and making it possible for the user to use different
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ones. The default algorithms used are the same as before this API
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change, but methods are moved to the classes Weighted_PCA_smoother and
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Alpha_shape_mesher.
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- Alternative smoothing and meshing methods are provided: Jet_smoother
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and Advancing_front_mesher.
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See http://www.cgal.org/2017/07/26/cgal411-beta1/ for a complete list of
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changes.
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The CGAL project is a collaborative effort to develop a robust,
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The CGAL project is a collaborative effort to develop a robust,
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