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doc/VERSIONS.txt

-2.6.0 (): new quadrilateral meshing algorithms (Blossom and DelQuad);
-new solver module based on ONELAB project; new tensor field
+2.6.0 (): new quadrilateral meshing algorithms (Blossom and DelQuad); new solver
+module based on ONELAB project (requires FLTK 1.3); new tensor field
 visualization modes (eigenvectors, ellipsoid, etc.); added support for
-interpolation schemes in .msh file; added support for MED3 format;
-rescale viewport around visible entities (shift+1:1 in GUI); unified
-post-processing field export; new experimental stereo+camera
-visualization mode; experimental BAMG & MMG3D support for anisotropic
-mesh generation; new OCC cut&merge algorithm imported from Salome; new
-ability to connect extruded meshes to tetrahedral grids using
-pyramids; Abaqus (INP) mesh export; various bug fixes and
-improvements.
-
-2.5.0 (Oct 15, 2010): new compound geometrical entities (for remeshing
-and/or trans-patch meshing); improved mesh reclassification tool; new
-client/server visualization mode; new ability to watch a pattern of
-files to merge; new integrated MPEG export; new option to force the
-type of views dynamically; bumped mesh version format to 2.2 (small
-change in the meaning of the partition tags; this only affects
-partitioned (i.e. parallel) meshes); renamed several post-processing
-plugins (as well as plugin options) to make them easier to understand;
-many bug fixes and usability improvements all over the place.
-
-2.4.2 (Sep 21, 2009): solver code refactoring + better IDE
-integration.
-
-2.4.1 (Sep 1, 2009): fixed surface mesh orientation bug introduced in
-2.4.0; mesh and graphics code refactoring, small usability
-enhancements and bug fixes.
+interpolation schemes in .msh file; added support for MED3 format; rescale
+viewport around visible entities (shift+1:1 in GUI); unified post-processing
+field export; new experimental stereo+camera visualization mode; experimental
+BAMG & MMG3D support for anisotropic mesh generation; new OCC cut&merge
+algorithm imported from Salome; new ability to connect extruded meshes to
+tetrahedral grids using pyramids; Abaqus (INP) mesh export; various bug fixes
+and improvements.
+
+2.5.0 (Oct 15, 2010): new compound geometrical entities (for remeshing and/or
+trans-patch meshing); improved mesh reclassification tool; new client/server
+visualization mode; new ability to watch a pattern of files to merge; new
+integrated MPEG export; new option to force the type of views dynamically;
+bumped mesh version format to 2.2 (small change in the meaning of the partition
+tags; this only affects partitioned (i.e. parallel) meshes); renamed several
+post-processing plugins (as well as plugin options) to make them easier to
+understand; many bug fixes and usability improvements all over the place.
+
+2.4.2 (Sep 21, 2009): solver code refactoring + better IDE integration.
+
+2.4.1 (Sep 1, 2009): fixed surface mesh orientation bug introduced in 2.4.0;
+mesh and graphics code refactoring, small usability enhancements and bug fixes.
 
 2.4.0 (Aug 22, 2009): switched build system to CMake; optionally copy
-transfinite mesh contraints during geometry transformations; bumped
-mesh version format to 2.1 (small change in the $PhysicalNames
-section, where the group dimension is now required); ported most
-plugins to the new post-processing API; switched from MathEval to
-MathEx and Flu_Tree_Browser to Fl_Tree; small bug fixes and
-improvements all over the place.
-
-2.3.1 (Mar 18, 2009): removed GSL dependency (Gmsh now simply uses
-Blas and Lapack); new per-window visibility; added support for
-composite window printing and background images; fixed string option
-affectation in parser; fixed surface mesh orientation for Open CASCADE
-models; fixed random triangle orientations in Delaunay and Frontal
-algorithms.
+transfinite mesh contraints during geometry transformations; bumped mesh version
+format to 2.1 (small change in the $PhysicalNames section, where the group
+dimension is now required); ported most plugins to the new post-processing API;
+switched from MathEval to MathEx and Flu_Tree_Browser to Fl_Tree; small bug
+fixes and improvements all over the place.
+
+2.3.1 (Mar 18, 2009): removed GSL dependency (Gmsh now simply uses Blas and
+Lapack); new per-window visibility; added support for composite window printing
+and background images; fixed string option affectation in parser; fixed surface
+mesh orientation for Open CASCADE models; fixed random triangle orientations in
+Delaunay and Frontal algorithms.
 
 2.3.0 (Jan 23, 2009): major graphics and GUI code refactoring; new
-full-quad/hexa subdivision algorithm; improved automatic transfinite
-corner selection (now also for volumes); improved visibility browser;
-new automatic adaptive visualization for high-order simplices;
-modified arrow size, clipping planes and transform options; many
-improvements and bug fixes all over the place.
-
-2.2.6 (Nov 21, 2008): better transfinite smoothing and automatic
-corner selection; fixed high order meshing crashes on Windows and
-Linux; new uniform mesh refinement (thanks Brian!); fixed various
-other small bugs.
-
-2.2.5 (Oct 25, 2008): Gmsh now requires FLTK 1.1.7 or above; various
-small improvements (STL and VTK mesh IO, Netgen upgrade, Visual C++
-support, Fields, Mesh.{Msh,Stl,...}Binary changed to Mesh.Bindary) and
-bug fixes (pyramid interpolation, Chaco crashes).
-
-2.2.4 (Aug 14, 2008): integrated Metis and Chaco mesh partitioners;
-variables can now be deleted in geo files; added support for point
-datasets in model-based postprocessing views; small bug fixes.
-
-2.2.3 (Jul 14, 2008): enhanced clipping interface; API cleanup; fixed
-various bugs (Plugin(Integrate), high order meshes, surface info
-crash).
-
-2.2.2 (Jun 20, 2008): added geometrical transformations on volumes;
-fixed bug in high order mesh generation.
-
-2.2.1 (Jun 15, 2008): various small improvements (adaptive views, GUI,
-code cleanup) and bug fixes (high order meshes, Netgen interface).
-
-2.2.0 (Apr 19, 2008): new model-based post-processing backend; added
-MED I/O for mesh and post-processing; fixed BDF vertex ordering for
-2nd order elements; replaced Mesh.ConstrainedBackgroundMesh with
-Mesh.CharacteristicLength{FromPoints,ExtendFromBoundary}; new Fields
-interface; control windows are now non-modal by default; new
-experimental 2D frontal algorithm; fixed various bugs.
-
-2.1.1 (Mar 1, 2008): small bug fixes (second order meshes, combine
-views, divide and conquer crash, ...).
-
-2.1.0 (Feb 23, 2008): new post-processing database; complete rewrite
-of post-processing drawing code; improved surface mesh algorithms;
-improved STEP/IGES/BREP support; new 3D mesh optimization algorithm;
-new default native file choosers; fixed 'could not find extruded
-vertex' in extrusions; many improvements and bug fixes all over the
+full-quad/hexa subdivision algorithm; improved automatic transfinite corner
+selection (now also for volumes); improved visibility browser; new automatic
+adaptive visualization for high-order simplices; modified arrow size, clipping
+planes and transform options; many improvements and bug fixes all over the
 place.
 
-2.0.8 (Jul 13, 2007): unused vertices are not saved in mesh files
-anymore; new plugin GUI; automatic GUI font size selection; renamed
-Plugin(DecomposeInSimplex) into Plugin(MakeSimplex); reintroduced
-enhanced Plugin(SphericalRaise); clarified meshing algo names; new
-option to save groups of nodes in UNV meshes; new background mesh
-infrastructure; many small improvements and small bug fixes.
-
-2.0.7 (Apr 3, 2007): volumes can now be defined from external CAD
-surfaces; Delaunay/Tetgen algorithm is now used by default when
-available; re-added support for Plot3D structured mesh format; added
-ability to export external CAD models as GEO files (this only works
-for the limited set of geometrical primitives available in the GEO
-language, of course--so trying to convert e.g. a trimmed NURBS from a
-STEP file into a GEO file will fail); "lateral" entities are now added
-at the end of the list returned by extrusion commands; fixed various
-bugs.
+2.2.6 (Nov 21, 2008): better transfinite smoothing and automatic corner
+selection; fixed high order meshing crashes on Windows and Linux; new uniform
+mesh refinement (thanks Brian!); fixed various other small bugs.
+
+2.2.5 (Oct 25, 2008): Gmsh now requires FLTK 1.1.7 or above; various small
+improvements (STL and VTK mesh IO, Netgen upgrade, Visual C++ support, Fields,
+Mesh.{Msh,Stl,...}Binary changed to Mesh.Bindary) and bug fixes (pyramid
+interpolation, Chaco crashes).
+
+2.2.4 (Aug 14, 2008): integrated Metis and Chaco mesh partitioners; variables
+can now be deleted in geo files; added support for point datasets in model-based
+postprocessing views; small bug fixes.
+
+2.2.3 (Jul 14, 2008): enhanced clipping interface; API cleanup; fixed various
+bugs (Plugin(Integrate), high order meshes, surface info crash).
+
+2.2.2 (Jun 20, 2008): added geometrical transformations on volumes; fixed bug in
+high order mesh generation.
+
+2.2.1 (Jun 15, 2008): various small improvements (adaptive views, GUI, code
+cleanup) and bug fixes (high order meshes, Netgen interface).
+
+2.2.0 (Apr 19, 2008): new model-based post-processing backend; added MED I/O for
+mesh and post-processing; fixed BDF vertex ordering for 2nd order elements;
+replaced Mesh.ConstrainedBackgroundMesh with
+Mesh.CharacteristicLength{FromPoints,ExtendFromBoundary}; new Fields interface;
+control windows are now non-modal by default; new experimental 2D frontal
+algorithm; fixed various bugs.
+
+2.1.1 (Mar 1, 2008): small bug fixes (second order meshes, combine views, divide
+and conquer crash, ...).
+
+2.1.0 (Feb 23, 2008): new post-processing database; complete rewrite of
+post-processing drawing code; improved surface mesh algorithms; improved
+STEP/IGES/BREP support; new 3D mesh optimization algorithm; new default native
+file choosers; fixed 'could not find extruded vertex' in extrusions; many
+improvements and bug fixes all over the place.
 
-2.0 (Feb 5, 2007): new geometry and mesh databases, with support for
-STEP and IGES import via Open CASCADE; complete rewrite of geometry
-and mesh drawing code; complete rewrite of mesh I/O layer (with new
-native binary MSH format and support for import/export of I-deas UNV,
-Nastran BDF, STL, Medit MESH and VRML 1.0 files); added support for
-incomplete second order elements; new 2D and 3D meshing algorithms;
-improved integration of Netgen and TetGen algorithms; removed
-anisotropic meshing algorithm (as well as attractors); removed
-explicit region number specification in extrusions; option changes in
-the graphical interface are now applied instantaneously; added support
-for offscreen rendering using OSMesa; added support for SVG output;
-added string labels for Physical entities; lots of other improvements
-all over the place.
-
-1.65 (May 15, 2006): new Plugin(ExtractEdges); fixed compilation
-errors with gcc4.1; replaced Plugin(DisplacementRaise) and
-Plugin(SphericalRaise) with the more flexible Plugin(Warp); better
-handling of discrete curves; new Status command in parser; added
-option to renumber nodes in .msh files (to avoid holes in the
-numbering sequence); fixed 2 special cases in quad->prism extrusion;
-fixed saving of 2nd order hexas with negative volume; small bug fixes
-and cleanups.
-
-1.64 (Mar 18, 2006): Windows versions do no depend on Cygwin anymore;
-various bug fixes and cleanups.
-
-1.63 (Feb 01, 2006): post-processing views can now be exported as
-meshes; improved background mesh handling (a lot faster, and more
-accurate); improved support for input images; new
-Plugin(ExtractElements); small bug fixes and enhancements.
-
-1.62 (Jan 15, 2006): new option to draw color gradients in the
-background; enhanced perspective projection mode; new "lasso"
-selection mode (same as "lasso" zoom, but in selection mode); new
-"invert selection" button in the visibility browser; new snapping grid
-when adding points in the GUI; nicer normal smoothing; new extrude
-syntax (old syntax still available, but deprecated); various small bug
-fixes and enhancements.
-
-1.61 (Nov 29, 2005): added support for second order (curved) elements
-in post-processor; new version (1.4) of post-processing file formats;
-new stippling options for 2D plots; removed limit on allowed number of
-files on command line; all "Combine" operations are now available in
-the parser; changed View.ArrowLocation into View.GlyphLocation;
-optimized memory usage when loading many (>1000) views; optimized
-loading and drawing of line meshes and 2D iso views; optimized
-handling of meshes with large number of physical entities; optimized
-vertex array creation for large post-processing views on
-Windows/Cygwin; removed Discrete Line and Discrete Surface commands
-(the same functionality can now be obtained by simply loading a mesh
-in .msh format); fixed coloring by mesh partition; added option to
-light wireframe meshes and views; new "mesh statistics" export format;
-new full-quad recombine option; new Plugin(ModulusPhase); hexas and
-prisms are now always saved with positive volume; improved interactive
-entity selection; new experimental Tetgen integration; new
-experimental STL remeshing algorithm; various small bug fixes and
-improvements.
-
-1.60 (Mar 15, 2005): added support for discrete curves; new Window
-menu on Mac OS X; generalized all octree-based plugins (CutGrid,
-StreamLines, Probe, etc.) to handle all element types (and not only
-scalar and vector triangles+tetrahedra); generalized Plugin(Evaluate),
-Plugin(Extract) and Plugin(Annotate); enhanced clipping plane
-interface; new grid/axes/rulers for 3D post-processing views (renamed
-the AbscissaName, NbAbscissa and AbscissaFormat options to more
-general names in the process); better automatic positioning of 2D
-graphs; new manipulator dialog to specify rotations, translations and
+2.0.8 (Jul 13, 2007): unused vertices are not saved in mesh files anymore; new
+plugin GUI; automatic GUI font size selection; renamed
+Plugin(DecomposeInSimplex) into Plugin(MakeSimplex); reintroduced enhanced
+Plugin(SphericalRaise); clarified meshing algo names; new option to save groups
+of nodes in UNV meshes; new background mesh infrastructure; many small
+improvements and small bug fixes.
+
+2.0.7 (Apr 3, 2007): volumes can now be defined from external CAD surfaces;
+Delaunay/Tetgen algorithm is now used by default when available; re-added
+support for Plot3D structured mesh format; added ability to export external CAD
+models as GEO files (this only works for the limited set of geometrical
+primitives available in the GEO language, of course--so trying to convert e.g. a
+trimmed NURBS from a STEP file into a GEO file will fail); "lateral" entities
+are now added at the end of the list returned by extrusion commands; fixed
+various bugs.
+
+2.0 (Feb 5, 2007): new geometry and mesh databases, with support for STEP and
+IGES import via Open CASCADE; complete rewrite of geometry and mesh drawing
+code; complete rewrite of mesh I/O layer (with new native binary MSH format and
+support for import/export of I-deas UNV, Nastran BDF, STL, Medit MESH and VRML
+1.0 files); added support for incomplete second order elements; new 2D and 3D
+meshing algorithms; improved integration of Netgen and TetGen algorithms;
+removed anisotropic meshing algorithm (as well as attractors); removed explicit
+region number specification in extrusions; option changes in the graphical
+interface are now applied instantaneously; added support for offscreen rendering
+using OSMesa; added support for SVG output; added string labels for Physical
+entities; lots of other improvements all over the place.
+
+1.65 (May 15, 2006): new Plugin(ExtractEdges); fixed compilation errors with
+gcc4.1; replaced Plugin(DisplacementRaise) and Plugin(SphericalRaise) with the
+more flexible Plugin(Warp); better handling of discrete curves; new Status
+command in parser; added option to renumber nodes in .msh files (to avoid holes
+in the numbering sequence); fixed 2 special cases in quad->prism extrusion;
+fixed saving of 2nd order hexas with negative volume; small bug fixes and
+cleanups.
+
+1.64 (Mar 18, 2006): Windows versions do no depend on Cygwin anymore; various
+bug fixes and cleanups.
+
+1.63 (Feb 01, 2006): post-processing views can now be exported as meshes;
+improved background mesh handling (a lot faster, and more accurate); improved
+support for input images; new Plugin(ExtractElements); small bug fixes and
+enhancements.
+
+1.62 (Jan 15, 2006): new option to draw color gradients in the background;
+enhanced perspective projection mode; new "lasso" selection mode (same as
+"lasso" zoom, but in selection mode); new "invert selection" button in the
+visibility browser; new snapping grid when adding points in the GUI; nicer
+normal smoothing; new extrude syntax (old syntax still available, but
+deprecated); various small bug fixes and enhancements.
+
+1.61 (Nov 29, 2005): added support for second order (curved) elements in
+post-processor; new version (1.4) of post-processing file formats; new stippling
+options for 2D plots; removed limit on allowed number of files on command line;
+all "Combine" operations are now available in the parser; changed
+View.ArrowLocation into View.GlyphLocation; optimized memory usage when loading
+many (>1000) views; optimized loading and drawing of line meshes and 2D iso
+views; optimized handling of meshes with large number of physical entities;
+optimized vertex array creation for large post-processing views on
+Windows/Cygwin; removed Discrete Line and Discrete Surface commands (the same
+functionality can now be obtained by simply loading a mesh in .msh format);
+fixed coloring by mesh partition; added option to light wireframe meshes and
+views; new "mesh statistics" export format; new full-quad recombine option; new
+Plugin(ModulusPhase); hexas and prisms are now always saved with positive
+volume; improved interactive entity selection; new experimental Tetgen
+integration; new experimental STL remeshing algorithm; various small bug fixes
+and improvements.
+
+1.60 (Mar 15, 2005): added support for discrete curves; new Window menu on Mac
+OS X; generalized all octree-based plugins (CutGrid, StreamLines, Probe, etc.)
+to handle all element types (and not only scalar and vector
+triangles+tetrahedra); generalized Plugin(Evaluate), Plugin(Extract) and
+Plugin(Annotate); enhanced clipping plane interface; new grid/axes/rulers for 3D
+post-processing views (renamed the AbscissaName, NbAbscissa and AbscissaFormat
+options to more general names in the process); better automatic positioning of
+2D graphs; new manipulator dialog to specify rotations, translations and
 scalings "by hand"; various small enhancements and bug fixes.
 
-1.59 (Feb 06, 2005): added support for discrete (triangulated)
-surfaces, either in STL format or with the new "Discrete Surface"
-command; added STL and Text output format for post-processing views
-and STL output format for surface meshes; all levelset-based plugins
-can now also compute isovolumes; generalized Plugin(Evaluate) to
-handle external view data (based on the same or on a different mesh);
-generalized Plugin(CutGrid); new plugins (Eigenvalues, Gradient, Curl,
-Divergence); changed default colormap to match Matlab's "Jet"
-colormap; new transformation matrix option for views (for
-non-destructive rotations, symmetries, etc.); improved solver
-interface to keep the GUI responsive during solver calls; new C++ and
-Python solver examples; simplified Tools->Visibility GUI; transfinite
-lines with "Progression" now allow negative line numbers to reverse
-the progression; added ability to retrieve Gmsh's version number in
-the parser (to help write backward compatible scripts); fixed white
-space in unv mesh output; fixed various small bugs.
-
-1.58 (Jan 01, 2005): fixed UNIX socket interface on Windows (broken by
-the TCP solver patch in 1.57); bumped version number of default
-post-processing file formats to 1.3 (the only small modification is
-the handling of the end-of-string character for text2d and text3d
-objects in the ASCII format); new File->Rename menu; new
-colormaps+improved colormap handling; new color+min/max options in
-views; new GetValue() function to ask for values interactively in
-scripts; generalized For/EndFor loops in parser; new plugins
-(Annotate, Remove, Probe); new text attributes in views; renamed some
-shortcuts; fixed TeX output for large scenes; new option dialogs for
-various output formats; fixed many small memory leaks in parser; many
-small enhancements to polish the graphics and the user interface.
-
-1.57 (Dec 23, 2004): generalized displacement maps to display
-arbitrary view types; the arrows representing a vector field can now
-also be colored by the values from other scalar, vector or tensor
-fields; new adaptive high order visualization mode; new options
-(Solver.SocketCommand, Solver.NameCommand, View.ArrowSizeProportional,
-View.Normals, View.Tangents and General.ClipFactor); fixed display of
-undesired solver plugin popups; enhanced interactive plugin behavior;
-new plugins (HarmonicToTime, Integrate, Eigenvectors); tetrahedral
-mesh file reading speedup (50% faster on large meshes); large memory
-footprint reduction (up to 50%) for the visualization of
-triangular/tetrahedral meshes; the solver interface now supports
-TCP/IP connections; new generalized raise mode (allows to use complex
-expressions to offset post-processing maps); upgraded Netgen kernel to
-version 4.4; new optional TIME list in parsed views to specify the
-values of the time steps; several bug fixes in the Elliptic mesh
-algorithm; various other small bug fixes and enhancements.
-
-1.56 (Oct 17, 2004): new post-processing option to draw a scalar view
-raised by a displacement view without using Plugin(DisplacementRaise)
-(makes drawing arbitrary scalar fields on deformed meshes much
-easier); better post-processing menu (arbitrary number of
-views+scrollable+show view number); improved view->combine; new
-horizontal post-processing scales; new option to draw the mesh nodes
-per element; views can now also be saved in "parsed" format; fixed
+1.59 (Feb 06, 2005): added support for discrete (triangulated) surfaces, either
+in STL format or with the new "Discrete Surface" command; added STL and Text
+output format for post-processing views and STL output format for surface
+meshes; all levelset-based plugins can now also compute isovolumes; generalized
+Plugin(Evaluate) to handle external view data (based on the same or on a
+different mesh); generalized Plugin(CutGrid); new plugins (Eigenvalues,
+Gradient, Curl, Divergence); changed default colormap to match Matlab's "Jet"
+colormap; new transformation matrix option for views (for non-destructive
+rotations, symmetries, etc.); improved solver interface to keep the GUI
+responsive during solver calls; new C++ and Python solver examples; simplified
+Tools->Visibility GUI; transfinite lines with "Progression" now allow negative
+line numbers to reverse the progression; added ability to retrieve Gmsh's
+version number in the parser (to help write backward compatible scripts); fixed
+white space in unv mesh output; fixed various small bugs.
+
+1.58 (Jan 01, 2005): fixed UNIX socket interface on Windows (broken by the TCP
+solver patch in 1.57); bumped version number of default post-processing file
+formats to 1.3 (the only small modification is the handling of the end-of-string
+character for text2d and text3d objects in the ASCII format); new File->Rename
+menu; new colormaps+improved colormap handling; new color+min/max options in
+views; new GetValue() function to ask for values interactively in scripts;
+generalized For/EndFor loops in parser; new plugins (Annotate, Remove, Probe);
+new text attributes in views; renamed some shortcuts; fixed TeX output for large
+scenes; new option dialogs for various output formats; fixed many small memory
+leaks in parser; many small enhancements to polish the graphics and the user
+interface.
+
+1.57 (Dec 23, 2004): generalized displacement maps to display arbitrary view
+types; the arrows representing a vector field can now also be colored by the
+values from other scalar, vector or tensor fields; new adaptive high order
+visualization mode; new options (Solver.SocketCommand, Solver.NameCommand,
+View.ArrowSizeProportional, View.Normals, View.Tangents and General.ClipFactor);
+fixed display of undesired solver plugin popups; enhanced interactive plugin
+behavior; new plugins (HarmonicToTime, Integrate, Eigenvectors); tetrahedral
+mesh file reading speedup (50% faster on large meshes); large memory footprint
+reduction (up to 50%) for the visualization of triangular/tetrahedral meshes;
+the solver interface now supports TCP/IP connections; new generalized raise mode
+(allows to use complex expressions to offset post-processing maps); upgraded
+Netgen kernel to version 4.4; new optional TIME list in parsed views to specify
+the values of the time steps; several bug fixes in the Elliptic mesh algorithm;
+various other small bug fixes and enhancements.
+
+1.56 (Oct 17, 2004): new post-processing option to draw a scalar view raised by
+a displacement view without using Plugin(DisplacementRaise) (makes drawing
+arbitrary scalar fields on deformed meshes much easier); better post-processing
+menu (arbitrary number of views+scrollable+show view number); improved
+view->combine; new horizontal post-processing scales; new option to draw the
+mesh nodes per element; views can now also be saved in "parsed" format; fixed
 various path problems on Windows; small bug fixes.
 
-1.55 (Aug 21, 2004): added background mesh support for Triangle;
-meshes can now be displayed using "smoothed" normals (like
-post-processing views); added GUI for clipping planes; new interactive
-clipping/cutting plane definition; reorganized the Options GUI;
-enhanced 3D iso computation; enhanced lighting; many small bug fixes.
+1.55 (Aug 21, 2004): added background mesh support for Triangle; meshes can now
+be displayed using "smoothed" normals (like post-processing views); added GUI
+for clipping planes; new interactive clipping/cutting plane definition;
+reorganized the Options GUI; enhanced 3D iso computation; enhanced lighting;
+many small bug fixes.
 
 1.54 (Jul 03, 2004): integrated Netgen (3D mesh quality optimization +
-alternative 3D algorithm); Extrude Surface now always automatically
-creates a new volume (in the same way Extrude Point or Extrude Line
-create new lines and surfaces, respectively); fixed UNV output; made
-the "Layers" region numbering consistent between lines, surfaces and
-volumes; fixed home directory problem on Win98; new
-Plugin(CutParametric); the default project file is now created in the
-home directory if no current directory is defined (e.g., when
-double-clicking on the icon on Windows/Mac); fixed the discrepancy
-between the orientation of geometrical surfaces and the associated
-surface meshes; added automatic orientation of surfaces in surface
-loops; generalized Plugin(Triangulate) to handle vector and tensor
-views; much nicer display of discrete iso-surfaces and custom ranges
-using smooth normals; small bug fixes and cleanups.
-
-1.53 (Jun 04, 2004): completed support for second order elements in
-the mesh module (line, triangles, quadrangles, tetrahedra, hexahedra,
-prisms and pyramids); various background mesh fixes and enhancements;
-major performance improvements in mesh and post-processing drawing
-routines (OpenGL vertex arrays for tri/quads); new Plugin(Evaluate) to
-evaluate arbitrary expressions on post-processing views; generalized
-Plugin(Extract) to handle any combination of components; generalized
-"Coherence" to handle transfinite surface/volume attributes; plugin
-options can now be set in the option file (like all other options);
-added "undo" capability during geometry creation; rewrote the contour
-guessing routines so that entities can be selected in an arbitrary
-order; Mac users can now double click on geo/msh/pos files in the
-Finder to launch Gmsh; removed support for FLTK 1.0; rewrote most of
-the code related to quadrangles; fixed 2d elliptic algorithm; removed
-all OpenGL display list code and options; fixed light positioning; new
-BoundingBox command to set the bounding box explicitly; added support
-for inexpensive "fake" transparency mode; many code cleanups.
-
-1.52 (May 06, 2004): new raster ("bitmap") PostScript/EPS/PDF output
-formats; new Plugin(Extract) to extract a given component from a
-post-processing view; new Plugin(CutGrid) and Plugin(StreamLines);
-improved mesh projection on non-planar surfaces; added support for
-second order tetrahedral elements; added interactive control of
-element order; refined mesh entity drawing selection (and renamed most
-of the corresponding options); enhanced log scale in post-processing;
-better font selection; simplified View.Raise{X,Y,Z} by removing the
-scaling; various bug fixes (default postscript printing mode, drawing
-of 3D arrows/cylinders on Linux, default home directory on Windows,
-default initial file browser directory, extrusion of points with
-non-normalized axes of rotation, computation of the scene bounding box
-in scripts, + the usual documentation updates).
-
-1.51 (Feb 29, 2004): initial support for visualizing mesh partitions;
-integrated version 2.0 of the MSH mesh file format; new option to
-compute post-processing ranges (min/max) per time step; Multiple views
-can now be combined into multi time step ones (e.g. for programs that
-generate data one time step at a time); new syntax: #var[] returns the
-size of the list var[]; enhanced "gmsh -convert"; temporary and error
-files are now created in the home directory to avoid file permission
-issues; new 3D arrows; better lighting support; STL facets can now be
-converted into individual geometrical surfaces; many other small
-improvements and bug fixes (multi timestep tensors, color by physical
-entity, parser cleanup, etc.).
-
-1.50 (Dec 06, 2003): small changes to the visibility browser + made
-visibility scriptable (new Show/Hide commands); fixed (rare) crash
-when deleting views; split File->Open into File->Open and File->New to
-behave like most other programs; Mac versions now use the system menu
-bar by default (if possible); fixed bug leading to degenerate and/or
-duplicate tetrahedra in extruded meshes; fixed crash when reloading
-sms meshes.
-
-1.49 (Nov 30, 2003): made Merge, Save and Print behave like Include
-(i.e., open files in the same directory as the main project file if
-the path is relative); new Plugin(DecomposeInSimplex); new option
-View.AlphaChannel to set the transparency factor globally for a
-post-processing view; new "Combine Views" command; various bug fixes
-and cleanups.
-
-1.48 (Nov 23, 2003): new DisplacementRaise plugin to plot arbitrary
-fields on deformed meshes; generalized CutMap, CutPlane, CutSphere and
-Skin plugins to handle all kinds of elements and fields; new "Save
-View[n]" command to save views from a script; many small bug fixes
-(configure tests for libpng, handling of erroneous options, multi time
-step scalar prism drawings, copy of surface mesh attributes, etc.).
-
-1.47 (Nov 12, 2003): fixed extrusion of surfaces defined by only two
-curves; new syntax to retrieve point coordinates and indices of
-entities created through geometrical transformations; new PDF and
-compressed PostScript output formats; fixed numbering of elements
-created with "Extrude Point/Line"; use $GMSH_HOME as home directory if
-defined.
-
-1.46 (Aug 23, 2003): fixed crash for very long command lines; new
-options for setting the displacement factor and Triangle's parameters
-+ renamed a couple of options to more sensible names (View.VectorType,
-View.ArrowSize); various small bug fixes; documentation update.
-
-1.45 (Jun 14, 2003): small bug fixes (min/max computation for tensor
-views, missing physical points in read mesh, "jumping" geometry during
-interactive manipulation of large models, etc.); variable definition
-speedup; restored support for second order elements in one- and
-two-dimensional meshes; documentation updates.
-
-1.44 (Apr 21, 2003): new reference manual; added support for PNG
-output; fixed small configure script bugs.
-
-1.43 (Mar 28, 2003): fixed solver interface problem on Mac OS X; new
-option to specify the interactive rotation center (default is now the
-pseudo "center of gravity" of the object, instead of (0,0,0)).
-
-1.42 (Mar 19, 2003): suppressed the automatic addition of a ".geo" extension
-if the file given on the command line is not recognized; added missing
-Layer option for Extrude Point; fixed various small bugs.
-
-1.41 (Mar 04, 2003): Gmsh is now licensed under the GNU General Public
-License; general code cleanup (indent).
+alternative 3D algorithm); Extrude Surface now always automatically creates a
+new volume (in the same way Extrude Point or Extrude Line create new lines and
+surfaces, respectively); fixed UNV output; made the "Layers" region numbering
+consistent between lines, surfaces and volumes; fixed home directory problem on
+Win98; new Plugin(CutParametric); the default project file is now created in the
+home directory if no current directory is defined (e.g., when double-clicking on
+the icon on Windows/Mac); fixed the discrepancy between the orientation of
+geometrical surfaces and the associated surface meshes; added automatic
+orientation of surfaces in surface loops; generalized Plugin(Triangulate) to
+handle vector and tensor views; much nicer display of discrete iso-surfaces and
+custom ranges using smooth normals; small bug fixes and cleanups.
+
+1.53 (Jun 04, 2004): completed support for second order elements in the mesh
+module (line, triangles, quadrangles, tetrahedra, hexahedra, prisms and
+pyramids); various background mesh fixes and enhancements; major performance
+improvements in mesh and post-processing drawing routines (OpenGL vertex arrays
+for tri/quads); new Plugin(Evaluate) to evaluate arbitrary expressions on
+post-processing views; generalized Plugin(Extract) to handle any combination of
+components; generalized "Coherence" to handle transfinite surface/volume
+attributes; plugin options can now be set in the option file (like all other
+options); added "undo" capability during geometry creation; rewrote the contour
+guessing routines so that entities can be selected in an arbitrary order; Mac
+users can now double click on geo/msh/pos files in the Finder to launch Gmsh;
+removed support for FLTK 1.0; rewrote most of the code related to quadrangles;
+fixed 2d elliptic algorithm; removed all OpenGL display list code and options;
+fixed light positioning; new BoundingBox command to set the bounding box
+explicitly; added support for inexpensive "fake" transparency mode; many code
+cleanups.
+
+1.52 (May 06, 2004): new raster ("bitmap") PostScript/EPS/PDF output formats;
+new Plugin(Extract) to extract a given component from a post-processing view;
+new Plugin(CutGrid) and Plugin(StreamLines); improved mesh projection on
+non-planar surfaces; added support for second order tetrahedral elements; added
+interactive control of element order; refined mesh entity drawing selection (and
+renamed most of the corresponding options); enhanced log scale in
+post-processing; better font selection; simplified View.Raise{X,Y,Z} by removing
+the scaling; various bug fixes (default postscript printing mode, drawing of 3D
+arrows/cylinders on Linux, default home directory on Windows, default initial
+file browser directory, extrusion of points with non-normalized axes of
+rotation, computation of the scene bounding box in scripts, + the usual
+documentation updates).
+
+1.51 (Feb 29, 2004): initial support for visualizing mesh partitions; integrated
+version 2.0 of the MSH mesh file format; new option to compute post-processing
+ranges (min/max) per time step; Multiple views can now be combined into multi
+time step ones (e.g. for programs that generate data one time step at a time);
+new syntax: #var[] returns the size of the list var[]; enhanced "gmsh -convert";
+temporary and error files are now created in the home directory to avoid file
+permission issues; new 3D arrows; better lighting support; STL facets can now be
+converted into individual geometrical surfaces; many other small improvements
+and bug fixes (multi timestep tensors, color by physical entity, parser cleanup,
+etc.).
+
+1.50 (Dec 06, 2003): small changes to the visibility browser + made visibility
+scriptable (new Show/Hide commands); fixed (rare) crash when deleting views;
+split File->Open into File->Open and File->New to behave like most other
+programs; Mac versions now use the system menu bar by default (if possible);
+fixed bug leading to degenerate and/or duplicate tetrahedra in extruded meshes;
+fixed crash when reloading sms meshes.
+
+1.49 (Nov 30, 2003): made Merge, Save and Print behave like Include (i.e., open
+files in the same directory as the main project file if the path is relative);
+new Plugin(DecomposeInSimplex); new option View.AlphaChannel to set the
+transparency factor globally for a post-processing view; new "Combine Views"
+command; various bug fixes and cleanups.
+
+1.48 (Nov 23, 2003): new DisplacementRaise plugin to plot arbitrary fields on
+deformed meshes; generalized CutMap, CutPlane, CutSphere and Skin plugins to
+handle all kinds of elements and fields; new "Save View[n]" command to save
+views from a script; many small bug fixes (configure tests for libpng, handling
+of erroneous options, multi time step scalar prism drawings, copy of surface
+mesh attributes, etc.).
+
+1.47 (Nov 12, 2003): fixed extrusion of surfaces defined by only two curves; new
+syntax to retrieve point coordinates and indices of entities created through
+geometrical transformations; new PDF and compressed PostScript output formats;
+fixed numbering of elements created with "Extrude Point/Line"; use $GMSH_HOME as
+home directory if defined.
+
+1.46 (Aug 23, 2003): fixed crash for very long command lines; new options for
+setting the displacement factor and Triangle's parameters + renamed a couple of
+options to more sensible names (View.VectorType, View.ArrowSize); various small
+bug fixes; documentation update.
+
+1.45 (Jun 14, 2003): small bug fixes (min/max computation for tensor views,
+missing physical points in read mesh, "jumping" geometry during interactive
+manipulation of large models, etc.); variable definition speedup; restored
+support for second order elements in one- and two-dimensional meshes;
+documentation updates.
+
+1.44 (Apr 21, 2003): new reference manual; added support for PNG output; fixed
+small configure script bugs.
+
+1.43 (Mar 28, 2003): fixed solver interface problem on Mac OS X; new option to
+specify the interactive rotation center (default is now the pseudo "center of
+gravity" of the object, instead of (0,0,0)).
+
+1.42 (Mar 19, 2003): suppressed the automatic addition of a ".geo" extension if
+the file given on the command line is not recognized; added missing Layer option
+for Extrude Point; fixed various small bugs.
+
+1.41 (Mar 04, 2003): Gmsh is now licensed under the GNU General Public License;
+general code cleanup (indent).
 
 1.40 (Feb 26, 2003): various small bug fixes (mainly GSL-related).
 
-1.39 (Feb 23, 2003): removed all non-free routines; more build system
-work; implemented Von-Mises tensor display for all element types;
-fixed small GUI bugs.
-
-1.38 (Feb 17, 2003): fixed custom range selection for 3D iso graphs;
-new build system based on autoconf; new image reading code to import
-bitmaps as post-processing views.
-
-1.37 (Jan 25, 2003): generalized smoothing and cuts of post-processing
-views; better Windows integration (solvers, external editors, etc.);
-small bug fixes.
-
-1.36 (Nov 20, 2002): enhanced view duplication (one can now use
-"Duplicata View[num]" in the input file); merged all option dialogs in
-a new general option window; enhanced discoverability of the view
-option menus; new 3D point and line display; many small bug fixes and
-enhancements ("Print" format in parser, post-processing statistics,
-smooth normals, save window positions, restore default options, etc.).
-
-1.35 (Sep 11, 2002): graphical user interface upgraded to FLTK 1.1
-(tooltips, new file chooser with multiple selection, full keyboard
-navigation, cut/paste of messages, etc.); colors can be now be
-directly assigned to mesh entities; initial tensor visualization; new
-keyboard animation (right/left arrow for time steps; up/down arrow for
-view cycling); new VRML output format for surface meshes; new plugin
-for spherical elevation plots; new post-processing file format
-(version 1.2) supporting quadrangles, hexahedra, prisms and pyramids;
-transparency is now enabled by default for post-processing plots; many
-small bug fixes (read mesh, ...).
-
-1.34 (Feb 18, 2002): improved surface mesh of non-plane surfaces;
-fixed orientation of elements in 2D anisotropic algorithm; minor user
-interface polish and additions (mostly in post-processing options);
-various small bug fixes.
-
-1.33 (Jan 24, 2002): new parameterizable solver interface (allowing up
-to 5 user-defined solvers); enhanced 2D aniso algorithm; 3D initial
-mesh speedup.
-
-1.32 (Oct 04, 2001): new visibility browser; better floating point
-exception checks; fixed infinite looping when merging meshes in
-project files; various small clean ups (degenerate 2D extrusion,
-view->reload, ...).
-
-1.31 (Nov 30, 2001): corrected ellipses; PostScript output update
-(better shading, new combined PS/LaTeX output format); more interface
-polish; fixed extra memory allocation in 2D meshes; Physical Volume
-handling in unv format; various small fixes.
-
-1.30 (Nov 16, 2001): interface polish; fix crash when extruding
-quadrangles.
+1.39 (Feb 23, 2003): removed all non-free routines; more build system work;
+implemented Von-Mises tensor display for all element types; fixed small GUI
+bugs.
+
+1.38 (Feb 17, 2003): fixed custom range selection for 3D iso graphs; new build
+system based on autoconf; new image reading code to import bitmaps as
+post-processing views.
+
+1.37 (Jan 25, 2003): generalized smoothing and cuts of post-processing views;
+better Windows integration (solvers, external editors, etc.); small bug fixes.
+
+1.36 (Nov 20, 2002): enhanced view duplication (one can now use "Duplicata
+View[num]" in the input file); merged all option dialogs in a new general option
+window; enhanced discoverability of the view option menus; new 3D point and line
+display; many small bug fixes and enhancements ("Print" format in parser,
+post-processing statistics, smooth normals, save window positions, restore
+default options, etc.).
+
+1.35 (Sep 11, 2002): graphical user interface upgraded to FLTK 1.1 (tooltips,
+new file chooser with multiple selection, full keyboard navigation, cut/paste of
+messages, etc.); colors can be now be directly assigned to mesh entities;
+initial tensor visualization; new keyboard animation (right/left arrow for time
+steps; up/down arrow for view cycling); new VRML output format for surface
+meshes; new plugin for spherical elevation plots; new post-processing file
+format (version 1.2) supporting quadrangles, hexahedra, prisms and pyramids;
+transparency is now enabled by default for post-processing plots; many small bug
+fixes (read mesh, ...).
+
+1.34 (Feb 18, 2002): improved surface mesh of non-plane surfaces; fixed
+orientation of elements in 2D anisotropic algorithm; minor user interface polish
+and additions (mostly in post-processing options); various small bug fixes.
+
+1.33 (Jan 24, 2002): new parameterizable solver interface (allowing up to 5
+user-defined solvers); enhanced 2D aniso algorithm; 3D initial mesh speedup.
+
+1.32 (Oct 04, 2001): new visibility browser; better floating point exception
+checks; fixed infinite looping when merging meshes in project files; various
+small clean ups (degenerate 2D extrusion, view->reload, ...).
+
+1.31 (Nov 30, 2001): corrected ellipses; PostScript output update (better
+shading, new combined PS/LaTeX output format); more interface polish; fixed
+extra memory allocation in 2D meshes; Physical Volume handling in unv format;
+various small fixes.
+
+1.30 (Nov 16, 2001): interface polish; fix crash when extruding quadrangles.
 
 1.29 (Nov 12, 2001): translations and rotations can now be combined in
-extrusions; fixed coherence bug in Extrude Line; various small bug
-fixes and additions.
-
-1.28 (Oct 30, 2001): corrected the 'Using Progression' attribute for
-tranfinite meshes to actually match a real geometric progression; new
-Triangulate plugin; new 2D graphs (space+time charts); better
-performance of geometrical transformations (warning: the numbering of
-some automatically created entities has changed); new text primitives
-in post-processing views (file format updated to version 1.1); more
-robust mean plane computation and error checks; various other small
-additions and clean-ups.
-
-1.27 (Oct 05, 2001): added ability to extrude curves with
-Layers/Recombine attributes; new PointSize/LineWidth options; fixed
-For/EndFor loops in included files; fixed error messages (line
-numbers+file names) in loops and functions; made the automatic removal
-of duplicate geometrical entities optional (Geometry.AutoCoherence=0);
-various other small bug fixes and clean-ups.
+extrusions; fixed coherence bug in Extrude Line; various small bug fixes and
+additions.
+
+1.28 (Oct 30, 2001): corrected the 'Using Progression' attribute for tranfinite
+meshes to actually match a real geometric progression; new Triangulate plugin;
+new 2D graphs (space+time charts); better performance of geometrical
+transformations (warning: the numbering of some automatically created entities
+has changed); new text primitives in post-processing views (file format updated
+to version 1.1); more robust mean plane computation and error checks; various
+other small additions and clean-ups.
+
+1.27 (Oct 05, 2001): added ability to extrude curves with Layers/Recombine
+attributes; new PointSize/LineWidth options; fixed For/EndFor loops in included
+files; fixed error messages (line numbers+file names) in loops and functions;
+made the automatic removal of duplicate geometrical entities optional
+(Geometry.AutoCoherence=0); various other small bug fixes and clean-ups.
 
 1.26 (Sep 06, 2001): enhanced 2D anisotropic mesh generator (metric
-intersections); fixed small bug in 3D initial mesh; added alternative
-syntax for built-in functions (for GetDP compatibility); added line
-element display; Gmsh now saves all the elements in the mesh if no
-physical groups are defined (or if Mesh.SaveAll=1).
-
-1.25 (Sep 01, 2001): fixed bug with mixed recombined/non-recombined
-extruded meshes; Linux versions are now build with no optimization,
-due to bugs in gcc 2.95.X.
-
-1.24 (Aug 30, 2001): fixed characteristic length interpolation for
-Splines; fixed edge swapping bug in 3D initial mesh; fixed degenerated
-case in geometrical extrusion (ruled surface with 3 borders); fixed
-generation of degenerated hexahedra and prisms for recombined+extruded
-meshes; added BSplines creation in the GUI; integrated Jonathan
-Shewchuk's Triangle as an alternative isotropic 2D mesh generator;
-added AngleSmoothNormals to control sharp edge display with smoothed
-normals; fixed random crash for lighted 3D iso surfaces.
-
-1.23 (Aug, 2001): fixed duplicate elements generation + non-matching
-tetrahedra faces in 3D extruded meshes; better display of displacement
-maps; fixed interactive ellipsis construction; generalized boundary
-operator; added new explode option for post-processing views; enhanced
-link view behavior (to update only the changed items); added new
-default plugins: Skin, Transform, Smooth; fixed various other small
-bugs (mostly in the post-processing module and for extruded meshes).
-
-1.22 (Aug 03, 2001): fixed (yet another) bug for 2D mesh in the mean
-plane; fixed surface coherence bug in extruded meshes; new double
-logarithmic scale, saturate value and smoothed normals option for
-post-processing views; plugins are now enabled by default; three new
-experimental statically linked plugins: CutMap (extracts a given iso
-surface from a 3D scalar map), CutPlane (cuts a 3D scalar map with a
-plane section), CutSphere (cuts a 3D scalar map with a sphere);
-various other bug fixes, additions and clean-ups.
-
-1.21 (Jul 25, 2001): fixed more memory leaks; added -opt command line
-option to parse definitions directly from the command line; fixed
-missing screen refreshes during contour/surface/volume selection;
-enhanced string manipulation functions (Sprintf, StrCat, StrPrefix);
-many other small fixes and clean-ups.
-
-1.20 (Jun 14, 2001): fixed various bugs (memory leaks, functions in
-included files, solver command selection, ColorTable option, duplicate
-nodes in extruded meshes (not finished yet), infinite loop on empty
-views, orientation of recombined quadrangles, ...); reorganized the
-interface menus; added constrained background mesh and mesh visibility
-options; added mesh quality histograms; changed default mesh colors;
-reintegrated the old command-line extrusion mesh generator.
-
-1.19 (May 07, 2001): fixed seg. fault for scalar simplex
-post-processing; new Solver menu; interface for GetDP solver through
-sockets; fixed multiple scale alignment; added some options + full
-option descriptions.
-
-1.18 (Apr 26, 2001): fixed many small bugs and incoherences in
-post-processing; fixed broken background mesh in 1D mesh generation.
-
-1.17 (Apr 17, 2001): corrected physical points saving; fixed parsing
-of DOS files (carriage return problems); easier geometrical selections
-(cursor change); plugin manager; enhanced variable arrays (sublist
-selection and affectation); line loop check; New arrow display;
-reduced number of 'fatal' errors + better handling in interactive
-mode; fixed bug when opening meshes; enhanced File->Open behavior for
-meshes and post-processing views.
-
-1.16 (Feb 26, 2001): added single/double buffer selection (only useful
-for Unix versions of Gmsh run from remote hosts without GLX); fixed a
-bug for recent versions of the opengl32.dll on Windows, which caused
-OpenGL fonts not to show up.
-
-1.15 (Feb 23, 2001): added automatic visibility setting during entity
-selection; corrected geometrical extrusion bug.
-
-1.14 (Feb 17, 2001): corrected a few bugs in the GUI (most of them
-were introduced in 1.13); added interactive color selection; made the
-option database bidirectional (i.e. scripts now correctly update the
-GUI); default options can now be saved and automatically reloaded at
-startup; made some changes to the scripting syntax
-(PostProcessing.View[n] becomes View[n]; Offset0 becomes OffsetX,
-etc.); corrected the handling of simple triangular surfaces with large
-characteristic lengths in the 2D isotropic algorithm; added an ASCII
-to binary post-processing view converter.
+intersections); fixed small bug in 3D initial mesh; added alternative syntax for
+built-in functions (for GetDP compatibility); added line element display; Gmsh
+now saves all the elements in the mesh if no physical groups are defined (or if
+Mesh.SaveAll=1).
+
+1.25 (Sep 01, 2001): fixed bug with mixed recombined/non-recombined extruded
+meshes; Linux versions are now build with no optimization, due to bugs in gcc
+2.95.X.
+
+1.24 (Aug 30, 2001): fixed characteristic length interpolation for Splines;
+fixed edge swapping bug in 3D initial mesh; fixed degenerated case in
+geometrical extrusion (ruled surface with 3 borders); fixed generation of
+degenerated hexahedra and prisms for recombined+extruded meshes; added BSplines
+creation in the GUI; integrated Jonathan Shewchuk's Triangle as an alternative
+isotropic 2D mesh generator; added AngleSmoothNormals to control sharp edge
+display with smoothed normals; fixed random crash for lighted 3D iso surfaces.
+
+1.23 (Aug, 2001): fixed duplicate elements generation + non-matching tetrahedra
+faces in 3D extruded meshes; better display of displacement maps; fixed
+interactive ellipsis construction; generalized boundary operator; added new
+explode option for post-processing views; enhanced link view behavior (to update
+only the changed items); added new default plugins: Skin, Transform, Smooth;
+fixed various other small bugs (mostly in the post-processing module and for
+extruded meshes).
+
+1.22 (Aug 03, 2001): fixed (yet another) bug for 2D mesh in the mean plane;
+fixed surface coherence bug in extruded meshes; new double logarithmic scale,
+saturate value and smoothed normals option for post-processing views; plugins
+are now enabled by default; three new experimental statically linked plugins:
+CutMap (extracts a given iso surface from a 3D scalar map), CutPlane (cuts a 3D
+scalar map with a plane section), CutSphere (cuts a 3D scalar map with a
+sphere); various other bug fixes, additions and clean-ups.
+
+1.21 (Jul 25, 2001): fixed more memory leaks; added -opt command line option to
+parse definitions directly from the command line; fixed missing screen refreshes
+during contour/surface/volume selection; enhanced string manipulation functions
+(Sprintf, StrCat, StrPrefix); many other small fixes and clean-ups.
+
+1.20 (Jun 14, 2001): fixed various bugs (memory leaks, functions in included
+files, solver command selection, ColorTable option, duplicate nodes in extruded
+meshes (not finished yet), infinite loop on empty views, orientation of
+recombined quadrangles, ...); reorganized the interface menus; added constrained
+background mesh and mesh visibility options; added mesh quality histograms;
+changed default mesh colors; reintegrated the old command-line extrusion mesh
+generator.
+
+1.19 (May 07, 2001): fixed seg. fault for scalar simplex post-processing; new
+Solver menu; interface for GetDP solver through sockets; fixed multiple scale
+alignment; added some options + full option descriptions.
+
+1.18 (Apr 26, 2001): fixed many small bugs and incoherences in post-processing;
+fixed broken background mesh in 1D mesh generation.
+
+1.17 (Apr 17, 2001): corrected physical points saving; fixed parsing of DOS
+files (carriage return problems); easier geometrical selections (cursor change);
+plugin manager; enhanced variable arrays (sublist selection and affectation);
+line loop check; New arrow display; reduced number of 'fatal' errors + better
+handling in interactive mode; fixed bug when opening meshes; enhanced File->Open
+behavior for meshes and post-processing views.
+
+1.16 (Feb 26, 2001): added single/double buffer selection (only useful for Unix
+versions of Gmsh run from remote hosts without GLX); fixed a bug for recent
+versions of the opengl32.dll on Windows, which caused OpenGL fonts not to show
+up.
+
+1.15 (Feb 23, 2001): added automatic visibility setting during entity selection;
+corrected geometrical extrusion bug.
+
+1.14 (Feb 17, 2001): corrected a few bugs in the GUI (most of them were
+introduced in 1.13); added interactive color selection; made the option database
+bidirectional (i.e. scripts now correctly update the GUI); default options can
+now be saved and automatically reloaded at startup; made some changes to the
+scripting syntax (PostProcessing.View[n] becomes View[n]; Offset0 becomes
+OffsetX, etc.); corrected the handling of simple triangular surfaces with large
+characteristic lengths in the 2D isotropic algorithm; added an ASCII to binary
+post-processing view converter.
 
 1.13 (Feb 09, 2001): added support for JPEG output on Windows.
 
-1.12: corrected vector lines in the post-processing parsed
-format; corrected animation on Windows; corrected file creation in
-scripts on Windows; direct affectation of variable arrays.
+1.12: corrected vector lines in the post-processing parsed format; corrected
+animation on Windows; corrected file creation in scripts on Windows; direct
+affectation of variable arrays.
 
 1.11 (Feb 07, 2001): corrected included file loading problem.
 
-1.10 (Feb 04, 2001): switched from Motif to FLTK for the GUI. Many
-small tweaks.
+1.10 (Feb 04, 2001): switched from Motif to FLTK for the GUI. Many small tweaks.
 
-1.00 (Jan 15, 2001): added PPM and YUV output; corrected nested
-If/Endif; Corrected several bugs for pixel output and enhanced GIF
-output (dithering, transparency); slightly changed the post-processing
-file format to allow both single and double precision numbers.
+1.00 (Jan 15, 2001): added PPM and YUV output; corrected nested If/Endif;
+Corrected several bugs for pixel output and enhanced GIF output (dithering,
+transparency); slightly changed the post-processing file format to allow both
+single and double precision numbers.
 
-0.999 (Dec 20, 2000): added JPEG output and easy MPEG generation (see
-t8.geo in the tutorial); clean up of export functions; small fixes;
-Linux versions are now compiled with gcc 2.95.2, which should fix the
-problems encountered with Mandrake 7.2.
+0.999 (Dec 20, 2000): added JPEG output and easy MPEG generation (see t8.geo in
+the tutorial); clean up of export functions; small fixes; Linux versions are now
+compiled with gcc 2.95.2, which should fix the problems encountered with
+Mandrake 7.2.
 
-0.998 (Dec 19, 2000): corrected bug introduced in 0.997 in the
-generation of the initial 3D mesh.
+0.998 (Dec 19, 2000): corrected bug introduced in 0.997 in the generation of the
+initial 3D mesh.
 
-0.997 (Dec 14, 2000): corrected bug in interactive surface/volume
-selection; Added interactive symmetry; corrected geometrical extrusion
-with rotation in degenerated or partially degenerated cases; corrected
-bug in 2D mesh when meshing in the mean plane.
+0.997 (Dec 14, 2000): corrected bug in interactive surface/volume selection;
+Added interactive symmetry; corrected geometrical extrusion with rotation in
+degenerated or partially degenerated cases; corrected bug in 2D mesh when
+meshing in the mean plane.
 
-0.996: arrays of variables; enhanced Printf and Sprintf; Simplified
-options (suppression of option arrays).
+0.996: arrays of variables; enhanced Printf and Sprintf; Simplified options
+(suppression of option arrays).
 
-0.995 (Dec 11, 2000): totally rewritten geometrical database
-(performance has been drastically improved for all geometrical
-transformations, and most notably for extrusion). As a consequence,
-the internal numbering of geometrical entities has changed: this will
-cause incompatibilities with old .geo files, and will require a
-partial rewrite of your old .geo files if these files made use of
+0.995 (Dec 11, 2000): totally rewritten geometrical database (performance has
+been drastically improved for all geometrical transformations, and most notably
+for extrusion). As a consequence, the internal numbering of geometrical entities
+has changed: this will cause incompatibilities with old .geo files, and will
+require a partial rewrite of your old .geo files if these files made use of
 geometrical transformations. The syntax of the .geo file has also been
 clarified. Many additions for scripting purposes. New extrusion mesh
-generator. Preliminary version of the coupling between extruded and
-Delaunay meshes. New option and procedural database. All interactive
-operations can be scripted in the input files. See the last example in
-the tutorial for an example. Many stability enhancements in the 2D and
-3D mesh algorithms. Performance boost of the 3D algorithm. Gmsh is
-still slow, but the performance becomes acceptable. An average 1000
-tetrahedra/second is obtained on a 600Mhz computer for a mesh of one
-million tetrahedra. New anisotropic 2D mesh algorithm. New (ASCII and
-binary) post-processing file format and clarified mesh file
-format. New handling for interactive rotations (trackball mode). New
-didactic interactive mesh construction (watch the Delaunay algorithm
-in real time on complex geometries: that's exciting ;-). And many,
-many bug fixes and cleanups.
-
-0.992 (Nov 13, 2000): corrected recombined extrusion; corrected
-ellipses; added simple automatic animation of post-processing maps;
-fixed various bugs.
-
-0.991 (Oct 24, 2000): fixed a serious allocation bug in 2D algorithm,
-which caused random crashes. All users should upgrade to 0.991.
+generator. Preliminary version of the coupling between extruded and Delaunay
+meshes. New option and procedural database. All interactive operations can be
+scripted in the input files. See the last example in the tutorial for an
+example. Many stability enhancements in the 2D and 3D mesh
+algorithms. Performance boost of the 3D algorithm. Gmsh is still slow, but the
+performance becomes acceptable. An average 1000 tetrahedra/second is obtained on
+a 600Mhz computer for a mesh of one million tetrahedra. New anisotropic 2D mesh
+algorithm. New (ASCII and binary) post-processing file format and clarified mesh
+file format. New handling for interactive rotations (trackball mode). New
+didactic interactive mesh construction (watch the Delaunay algorithm in real
+time on complex geometries: that's exciting ;-). And many, many bug fixes and
+cleanups.
+
+0.992 (Nov 13, 2000): corrected recombined extrusion; corrected ellipses; added
+simple automatic animation of post-processing maps; fixed various bugs.
+
+0.991 (Oct 24, 2000): fixed a serious allocation bug in 2D algorithm, which
+caused random crashes. All users should upgrade to 0.991.
 
 0.990: bug fix in non-recombined 3D transfinite meshes.
 
-0.989 (Sep 01, 2000): added ability to reload previously saved meshes;
-some new command line options; reorganization of the scale menu; GIF
-output.
+0.989 (Sep 01, 2000): added ability to reload previously saved meshes; some new
+command line options; reorganization of the scale menu; GIF output.
 
-0.987: fixed bug with smoothing (leading to the possible generation of
-erroneous 3d meshes); corrected bug for mixed 3D meshes; moved the
-'toggle view link' option to Opt->Postprocessing_Options.
+0.987: fixed bug with smoothing (leading to the possible generation of erroneous
+3d meshes); corrected bug for mixed 3D meshes; moved the 'toggle view link'
+option to Opt->Postprocessing_Options.
 
-0.986: fixed overlay problems; SGI version should now also run on 32
-bits machines; fixed small 3d mesh bug.
+0.986: fixed overlay problems; SGI version should now also run on 32 bits
+machines; fixed small 3d mesh bug.
 
-0.985: corrected colormap bug on HP, SUN, SGI and IBM versions;
-corrected small initialization bug in postscript output.
+0.985: corrected colormap bug on HP, SUN, SGI and IBM versions; corrected small
+initialization bug in postscript output.
 
-0.984: corrected bug in display lists; added some options in
-Opt->General.
+0.984: corrected bug in display lists; added some options in Opt->General.
 
-0.983: corrected some seg. faults in interactive mode; corrected bug
-in rotations; changed default window sizes for better match with
-1024x768 screens (default X resources can be changed: see ex03.geo).
+0.983: corrected some seg. faults in interactive mode; corrected bug in
+rotations; changed default window sizes for better match with 1024x768 screens
+(default X resources can be changed: see ex03.geo).
 
-0.982: lighting for mesh and post-processing; corrected 2nd order mesh
-on non plane surfaces; added example 13.
+0.982: lighting for mesh and post-processing; corrected 2nd order mesh on non
+plane surfaces; added example 13.