Molby - A Molecular Modeling Software

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- Opening bond/angle/dihedral/improper table now triggers searching MD parameters (but not rebuilding angle/dihedral/improper tables).
- Property table can now list the unit cell parameters.
- "Show Graphite" command was using _very_ wrong C-C bond length. Now it uses correct length (1.42 angstrom).
- Best-fit plane calculations are implemented.
- The revision number is displayed in the about dialog.
- Cell parameter minimization is implemented (still experimental).
- The restriction on the number of bonds (12) is removed.
- Ruby: Dialog#filter_kit is implemented. The how-to is described in the document (appendix).
- Ruby: LAMatrix#svd (singular value decomposition) was implemented.
- Ruby: The methods bond_par, angle_par, dihedral_par, improper_par, vdw_par are moved from Molecule to MDArena.
- Bug fixes (see the ChangeLog)

- Ruby: Dialog#filter_kit is implemented.
- Crash when loading a new molecule was fixed.
- ORTEP export did not generate the same orientation as in the screen. Fixed.
- Ruby: Molecule#bond_par, angle_par, dihedral_par, improper_par, vdw_par are made obsolete, and instead MDArena#bond_par, angle_par, dihedral_par, improper_par, vdw_par are implemented. These methods returns the 'cached' parameters in the MDArena. The ParameterRef record for these parameters have a negative index, which represents the parameter belongs to the MDArena instead of the molecule.
- Opening bond/angle/dihedral/improper table now triggers search of MD parameters (but not rebuilding angle/dihedral/improper tables from bond information)
- Handling of view-related attributes of Molecule is improved (specifically, methods like Molecule#show_periodic_image= now work).
- Best-fit plane dialog is not working in Windows; fixed.
- Some fields in md_arena were not properly copied when a molecule is duplicated. Fixed.
- 'Show Graphite' command was using wrong C-C bond length. Fixed.
- Some unused fields of Molecule were removed.
- LAMatrix#svd (singular value decomposition) was implemented.
- Ruby: create_graphic was not working correctly when :ellipsoid is given with a single radius.
- Loading multiple-frame mbsf sometimes fails to load the cell parameter for the last frame. Fixed.
- Property table can now list the unit cell parameters.
- Documents for Dialog#show, Dialog#hide are written. (These were somehow missing)
- Cell minimization was not working correctly when no symmetry operations are defined. Fixed.
- MDArena#prepare was not working correctly when unit cell is added/created after initialization of MDArena. Fixed.
- Handling of selection from Ruby script was partially broken. Fixed.
- Best fit plane dialog was behaving strangely Fixed.
- Handling of Molecule object was not consistent. Hopefully fixed...
- Export ORTEP (improved) and best-fit plane calculations are implemented in Scripts/crystal.rb.
- The revision number is displayed in the about dialog (and is used for labeling clipboard contents)
- Copy/paste of molecules was broken when it had atoms with more than ATOMS_CONNECTS_LIMIT bonds. Fixed.
- Documents for some missing Ruby methods are written.
- Cell minimization is improved (hopefully...)
- Remove printf() for debugging cell minimization
- Implemented minimization of cell parameters. Looks like working...
- Handling of flexible cells were still inconsistent.
- Molecule#cell_flexibility and set_cell_flexibility are implemented, and enable/disable_cell_flexibility are removed.
- Figures for the Ruby tutorial are added to the repository.
- Handling of periodic box during MD is being reworked.
- Ruby: Molecule#box= was not working as expected. Fixed.
- Memory leak bugs are examined and removed.
- amend_by_symmetry in MD was still broken. Hopefully fixed.
- Tutorial for the Ruby interpreter was (finally) written.
- amend_by_symmetry during MD run was causing crash. Fixed.
- Graphite potential calculation is further modified (hope this is complete now!)
- When no molecule is open, Ruby scripts are evaluated in the context of 'main' (the toplevel object)
- Graphite potential calculation is improved.
- The current working directory is set to the document home on startup.
- The anisotropic parameters for the symmetry expanded atoms are now correctly handled.
- Pressure control and surface potential are removed from the GUI; they are not well tested and should be used with great care.
- The load commands can now include error messages in Ruby exception.
- MD minimize was not working properly (especially for the second run with the same molecule). Fixed.
- Symmetry expansion in CIF import is improved. (May not be complete yet)
- Molecule#expand_by_symmetry now returns an array of atom indices instead of IntGroup.
- Molecule#symop_for_transform and transform_for_symop are implemented. The symmetry expansion of CIF import is being reworked, but still incomplete.
- Molecule#is_atom_hidden and AtomRef#hidden, hidden= are implemented, and Molecule#hidden_atoms and hidden_atoms= are made obsolete.
- Molecule#set/get_view_rotation: the sign of the angle is made opposite (left-hand screw in respect to the axis), so that it is consistent with Transform#rotation. This is opposite to the convention of the OpenGL rotator.
- The restriction on the number of bonds (12) is removed (modified so heavily, that it is likely that there is still some bugs left...)
- Include periodicity flags in the 'define unit cell' dialog
- Problem on guessing UFF angle parameter was fixed.
- Fixed a very stupid bug in drawing unit cell.
- Handling of frame-specific cell parameters was very inconsistent. Hopefully fixed, but may be still incomplete.
- Graphite potential in MM/MD gets recalculated much less frequently now.
- Building verlet list was reworked to implement complete search of the periodic lattice points. Still in progress.
- Symmetry operations from the CIF file were not read correctly for hexagonal system. Fixed.
- Mac (only 10.6?): when the graphite display is on, the lighting of the molecule model looks strange. Fixed.