- simplified background drawing (+added option to use jpeg/png image)
- better default clipping planes

added File->Clear + changed behaviour of File->New (now just adds a
new model)

allow smaller fonts for palettes (test with "-deltafontsize")

use display list for 3d arrows (approx. 2x speedup on my laptop for
large vector views) and spheres

removed static quadrics (wrong when \exists multiple gl contexts),
replaced with correct(?) init in drawContext

- fix bb computation to avoid model jumping around when adding points in z=0 plane
- pass interpol matrices as ref

workaround faulty fltk installs (e.g. in current Debian or Ubuntu)

There's no new functionality for now: PLEASE TEST THAT EVERYTHING
WORKS AS IT USED TO BEFORE.

multi-window & multi-coordinate system drawing.

There's no new functionality for now: PLEASE TEST THAT EVERYTHING
WORKS AS IT USED TO BEFORE.

- use std::string in Draw_String & co
- add pyramid test

untabify

- notion of partitions and interpolationScheme
- move string utils in separate file

start reducing header pollution (removed Gmsh.h + cleaned up GModel & co)

prepare "invert selection"

- added option to print all latex strings as equations
- fixed constness of prototype in autocad/message.c (thx to oshima@eng.niigata-u.ac.jp)

prepa invert_selection + remove some debug prints

bidir db: phase 3 -- move all the old geo stuff into Geo/

more work on mesh editing

start work on mesh>edit feature (delete elements, etc.)

simplify TeX printing

reduce dependencies by putting the selection buffer stuff in its own file

- rewrote selection code to use dynamic arrays, so that we should never
overflow the selection buffer again (even on huuuuge models)
- cleanup some leftovers "useing namespace std"

changed default hover+selection mode as follows:

- by default, mouse hover+selection is ON for the geometry, but only
  mouse selection is ON for the mesh

- with Shift+Escape, one can activate "full" selection mode, i.e., also
  allow mouse hover for the mesh

I've disabled the hover over mesh stuff due to slow performance on both
of the Windows machines I have access to over here.

With these new settings I get interactive performance (about 4 frames
per second) when visualization a 6 million tetrahedra mesh, with all the
edges inside visible, lights turned on, etc. This takes about 600Mb of
RAM.

enable multiple de-selections at once using the lasso

merging offscreen rendering from branch

- new button under the graphic window to temporarily disable mouse
  selection (speeds-up redrawing of very large models + permits to
  rotate/zoom-in a model in selection mode even when the whole screen
  is full of selectable entities--e.g. a surface mesh)

- new "lasso" selection mode (to select entities using the same kind
  of lasso as the lasso zoom: just Ctrl+click, then drag the mouse in
  selection mode; the shortcuts are the same as for the lasso zoom)

- it is now possible to unselect entities using the middle mouse button
  (only for the creation of physicals at the moment; not sure if it's
  useful in the other cases)

- new button in visibility browser to invert the current selection
  (very useful e.g. when multiple physical entities are associated
  with a given elementary entity, in order to "peel" away the model
  when adding new physicals; cf. philou)

- changed meaning of Escape shortcut (cancel lasso or toggle mouse
  selection) + restore standard fltk Escape handling for all dialog
  windows

- updated copyright string

- new mesh label mode (coordinates); all label types are now also
  available for mesh vertices

- added option in 'Print Option' dialog to disable printing of help
  strings

- added a comment string with the date when creating a new file

- new snapping grid for adding points in the GUI

little hack to draw a gradient in the background. Nice for flashy
presentations ;-)