we use the Lawson algorithm for 3D surface and the smallest circumsphere
of the triangles as circumcircle.

JFR

prepare for named string expr

- tentative fix for the "mysterious" crashes on Windows:

  I think that the problem comes from the new recursive tetra
  classification, where we probably overflow the stack on Windows. The
  fix is to request a larger initial stack size through the linker.

- added option to control label saving in unrolled geo files

- only test for neg jacobians for 2D/plane meshes for now

- fixed several compiler warnings

- preliminary work to interface more parser functions with general
  GEntities

- we can now export simple GModels as.geo files (points, straight line
  segments, plane surfaces, ruled surfaces and volumes are treated
  correctly; all non-straight-line curves are exported as splines; all
  non-plane/ruled surfaces are not exported)

- tentative fix for the unv export problem reported on the mailing
  list (fprintf() buggy on some machines??)

- new IO (both read and write) for structured grids using the NASA
  Plot3D format (for Olivier)

fix syntax for hole carving

- boundary layer can now be generated by using a post-pro view for the
  normal field

- added more operations on lists in parser (FExpr * FExpr_Multi, etc.)

- new "hole carving" code to create extruded grids carved out around
  some surfaces (the resulting cavity can be filled with "grout" using
  the unstructured algos)

- check if bboxes of post-pro views are not == VAL_INF before adding
  them to the model bbox (bug report from Renaud Sizaire)

- fixed crash in LCM_xxx tensor drawing code when no tensor points are
  available. (This piece of code should be cleaned up further--no time
  for that now.)

- generalize Levelset plugins so that they work on point data sets

new boundary layer mesh generator

refactored smooth value/smooth normal code into single SmoothData.* file

added General.MinX, General.MaxX, etc. so that we can easily get the
min/max of a model (useful e.g. to create a box around an imported
STEP model)

added example of mixed step/geo model

include the geometrical entities defined in this script (since we
import THEM into GModel *after* we've parsed the file)

orientation bug in extrusion

- make it easier to build universal binaries on Mac
- remove unused arg in transform functions (an prepare the terrain for periodic meshes)

- added warning dialog before attempting to append a scripting
command to a non-geometry file

- fixed mean plane computation for periodic curves

- added headers + ramn indent on Attractor files

enhancement of gmsh Surfaces

JFR

fix shift/reduce conflict in parser (had to slightly modify embedding syntax)

make depend

corrected some bugs in 2d mesher & occ interface

added MED export capability (merci Pascale!!)

- using quads to draw 2nd order elements was a bad idea (they can be
non-plane, so the normals computed for lighting did not always look
nice). It's better to just split each quad into 2 triangles.

- import THEM in ParseString

- save physicals labels when saving unrolled geometries
- fixed crash in unrolled geo save (discrete points)
- Delete Physicals now also deletes the physicals in GModel
- removed unused rules and terminals in parser
- put at least one mid-point when meshing non-straight lines
  in OCC: this fixes most of the trivial 2d meshing problems

removed gobal meshSize in GMODEL: for now use CTX.lc, which is correctly
updated when multiple files are merged

- new option Geometry.Tolerance (or -tol on the command line) to set the
tolerance for the old CAD engine, for OCC healing and for STL import

- removed more unused options

removed most unused, untested or non-working stuff in old CAD code

- bug fix: need to create temporary bounding box and compute CTX.lc
*during* parsing step until we fill the new db on the fly

(Some geo transforms in the parser use CTX.lc for tolerences. But
CTX.lc was always equal to 1 since we only do a SetBoundingBox on
GModel after parsing!)

- cleanup spline interpol (remove duplicate code)

- removed ugly fix in transf mesh of tri surf
- use MFaceVertex params in boundary mesh if available
- cleanup intro chapter in docs

fix err msg

Added basic support for physicals in all mesh formats that ignored physicals
before (stl, vrml, mesh, bdf, pos). This way we can use the physical mechanism
to only save parts of the mesh (like we do it now for msh and unv files).

Next step will be to add an option to only mesh the physicals (and their
dependencies). This is very useful for large models and/or for debugging.

better integration with mac finder

OpenProblem -> OpenProject
MergeProblem -> MergeFile

Layers{N,1} can now be written simply as Layers{N}

deprecated -> warnings instead of errors

make default transfinite subdivision match old version to minimize
backward compat problems