update command line help

added optimization hooks in the interface (GUI + comamnd line)

Merged Netgen 4.3.1: a Delaunay/Frontal 2D/3D mesh generator.

Thanks a lot to Nicolas Tardieu for this!

- mesh.algo -> algo2d and algo3d
- replaced most of the remaining radio buttons with Fl_Choices (requires
  less screen real estate)

create the default project file in the home directory if no "current"
directory is defined (e.g. when double-clicking on the icon on Windows/MacOS)

Do a default List_Create in List_CreateFromFile instead of returning NULL.
(This fixes the problems in Plugins that assume that the element lists
are all ready to be added into.)

replace CutCircle/CutCurve with CutParametric

forgot to deal with quadrangles here

- couple of aesthetic changes in Options->General

- tentative fix of home directory problem on Windows95/98

- made Layer's region numbeing behaviour consistent between
  lines/surfaces/volumes

- force mesh.changed when we modify surface_edges/faces display

quick hack to implement "fake transparency" as in xpost

disable the perspective button for now

added small button to switch between perspective and orthographic
projection modes

fix for the "per time step" min/max

removed old unused options

- don't call glNormal unnecessarily

- do The Right Thing (TM) with the light position, i.e., set it
  *before* we multiply by the modelview matrix. It's much easier
  to achieve predictable lighting results like this: (-1,0,0)
  simply means "light from the left", (0,1,0) means "light from
  the top", (0,0,1) means "light from the front", etc.

- fixed orientation of boundary of post tet

- added new LightTwoSide option: with this turned off, we achieve
  roughly the same performance as SceneViewer on large data sets, i.e.,
  around 1 million triangles (SceneViwer is the "industry standard"
  OpenGL viewer from SGI). Nice... ;-)

force view->Changed when we change the light setting

- generalized vertex arrays to handle quads

- added missing Ellispe ... Plane ... in parser

simplified vertex array logic

- generalized vertex array class to use reallocatable arrays

- introduced vertex arrays in post for all triangles: this speeds
  things up tremendously for ALL scalar views: 2d scalar views of
  course, but also for 3d isos (tets, hexas, etc.) and all smooth
  normals. The costly computations (compute the isos, get the normals)
  are only done ONCE each time the view is changed. Then we just pass
  the vertex array to OpenGL everytime we need to redraw (e.g. when we
  rotate the scene)

- removed the display list code alltogether: it's completely blown
  away by the new vertex array code!

for the record: with the new drawing code, you can

- rotate 500,000 triangles in real time on a 3-year old linux PC
(tested with a boing 747 surface mesh from CU: 10 times faster than
old code)

- display and rotate in real time 10 transparent+smooth shaded 3D isos
for a 1 million tet mesh (about 1 frame per second with the new code;
took tens of seconds with the old one)

Awesome :-)

update doc for vertex arrays

since we store the colors in the vertex array, we need to mark the
mesh as changed when we change the colors

- added experimental support for vertex arrays in the mesh drawing code
(only for triangles at the moment). This speeds up the drawing of large
meshes tremendously!

- removed support for mesh display lists

Added final bit for 2nd order elements: the middle face nodes for
quadrangular faces (i.e., for quadrangles, hexahedra, prisms and
pyramids).

- removed the quads from the simplex trees (finally...)

  **warning**

  this is a pretty big patch that touches a lot of different files. I
  tried my best to update all the things that needed to be updated,
  but I probably forgot some things... Please test! (especially the
  export routines in obscure formats like SMS, Gref, etc., as well as
  the extrusion code)

- added second order edge vertices for hexas, prisms and pyramids
  (drawing not done yet)

- added sanity check for number of values in post-pro parsed file
  format

- merged all mesh printing/reading routines in Print_Mesh.cpp and
  Read_Mesh.cpp

- cleaned up the statistics code

Small changes inspired by Wednesday's discussions:

- Mac only: Gmsh now publishes its "file types"... That means that
  geo/msh/pos files now have nice icons, and that you can double-click
  on a geo/msh/pos file in the Finder to open it :-)

- removed support for fltk 1.0 (wasn't compiling anymore anyway)

- doubled the timout in GmshServer (2->4s): this seems to help on
  Windows (thanks to jkools@veeco.com)

- added warnings in the docs about the Attractor feature

- increased WB by 1 pixel in the GUI

- replaced more Msg(FATAL) with Msg(ERROR) where it makes sense

- merged ONSCREEN1 and ONSCREEN2 to minimize redraws

- fixed s->Orientations test

display the interactive messages in the graphic window (instead of the
status bar)

removed unused geom.overlay option

removed unused geom.highlight option + small cleanup of the selection code

output solver errors+warnings in red, too

add 1 more verbosity level; bump default to 3

reorganized Msg() a little ("a la getdp" + colorize solver and direct messages)

set default number of smoothing passes to 1

fixed small bug in colortable_diff

save view type only in FULLRC (not OPTIONRC)

- removed context.default_plugin

- changed the main so that we load the plugins *before* we set the
  options (this way you can save your favourite plugin options in
  .gmsh-options, too)