Changes in Kalzium's 3D renderer:

Changes in Kalzium's 3D renderer:

- Display Lists are back. Enable by #defining USE_DISPLAY_LISTS
  (currently enabled).
  Advantage: makes rendering faster
  Inconvenient: uses more memory
  TODO: measure how much more memory it uses.

  Vertex arrays are now automatically converted into (nested) display
  lists when this option is set. This prevents vertex array data from
  being redundantly copied into the display list.

- Now use OB's GetRGB function to get the color of atoms

- Implement our own molecule centering code. Neither OBMol::Center() nor
  OBMol::Translate() did work for me (but maybe I'm stupid).

- reorganization in the VertexArray class ( more to come )

M    src/kalziumglwidget.h
M    src/kalziumglhelperclasses.h
M    src/kalziumglwidget.cpp
M    src/kalziumglhelperclasses.cpp

svn path=/trunk/KDE/kdeedu/kalzium/src/kalziumglwidget.h; revision=557582