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About RasMol

The RISC OS port


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RasMol - a molecular visualisation tool


  • 27-Nov-02: RISC OS RasMol 1.40b releasednew!
  • 26-Nov-02: 32-bit compatible RISC OS RasMol 1.40 released
  • 26-Sep-99: RISC OS RasMol 1.31 released
  • 27-Aug-99: RISC OS RasMol 1.30 released based on RasMol 2.7.1

Name RasMol
Purpose Molecular graphics visualisation tool
Author Roger Sayle, ported to RISC OS by Martin Würthner
Requires RISC OS 3.1 or higher, 32-bit SharedCLib
Status FreeWare
Version 1.40b (27-Nov-2002)
Name RasMol (old version with some bug fixes missing)
Purpose Molecular graphics visualisation tool
Author Roger Sayle, ported to RISC OS by Martin Würthner
Requires RISC OS 3.1 or higher
Status FreeWare
Version 1.31b (01-Aug-2001)

About RasMol

Quoted from the RasMol help file:

RasMol is a molecular graphics program intended for the visualisation of proteins, nucleic acids and small molecules. The program is aimed at display, teaching and generation of publication quality images. The program has been developed at the University of Edinburgh's Biocomputing Research Unit and the Biomolecular Structures Group at Glaxo Research and Development, Greenford, UK.

RasMol reads in molecular co-ordinate files in a number of formats and interactively displays the molecule on the screen in a variety of colour schemes and representations. Currently supported input file formats include Brookhaven Protein Databank (PDB), Tripos' Alchemy and Sybyl Mol2 formats, Molecular Design Limited's (MDL) Mol file format, Minnesota Supercomputer Center's (MSC) XMol XYZ format, CHARMm format, MOPAC format, CIF format and mmCIF format files. If connectivity information and/or secondary structure information is not contained in the file this is calculated automatically. The loaded molecule may be shown as wireframe, cylinder (drieding) stick bonds, alpha-carbon trace, spacefilling (CPK) spheres, macromolecular ribbons (either smooth shaded solid ribbons or parallel strands), hydrogen bonding and dot surface. Atoms may also be labelled with arbitrary text strings. Alternate conformers and multiple NMR models may be specially coloured and identified in atom labels. Different parts of the molecule may be displayed and coloured independently of the rest of the molecule or shown in different representations simultaneously. The space filling spheres can even be shadowed. The displayed molecule may be rotated, translated, zoomed, z-clipped (slabbed) interactively using either the mouse, the scroll bars, the command line or an attached dials box. RasMol can read a prepared list of commands from a `script' file (or via interprocess communication) to allow a given image or viewpoint to be restored quickly. RasMol can also create a script file containing the commands required to regenerate the current image. Finally the rendered image may be written out in a variety of formats including both raster and vector PostScript, GIF, PPM, BMP, PICT, Sun rasterfile or as a MolScript input script or Kinemage.

RasMol will run on a wide range of architectures and systems including SGI, sun4, sun3, sun386i, SGI, DEC, HP and E&S workstations, IBM RS/6000, Cray, Sequent, DEC Alpha (OSF/1, OpenVMS and Windows NT), IBM PC (under Microsoft Windows, Windows NT, OS/2, Linux, BSD386 and *BSD), Apple Macintosh (System 7.0 or later), PowerMac and VAX VMS (under DEC Windows).

The RISC OS port of RasMol

Since 1996, there has also been an Acorn RISC OS port running under RISC OS 3.1 or greater. The current version offers support for features of RISC OS >= 3.5 like dynamic areas and true-colour screen modes. The most recent version is compatible with RISC OS 4 and the 32-bit RISC OS 5.

Apart from offering full compatibility with the UNIX version, the Acorn RISC OS version also offers additional features, e.g. a toolbar in the usual RISC OS style to make it easier to move, zoom and rotate molecules (now also including a RasMol tool that switches to the original RasMol mouse mapping) and the ability to perform error diffused dithering on molecule images to improve the display in 16 and 256 colour modes. The menu structure and file loading/saving follows the usual RISC OS conventions and naturally, the bitmap export options of RasMol have been enhanced by a Sprite export option in addition to GIF export.

RasMol screenshot

Download section

RasMol icon Download RasMol 1.40b (32-bit compatible, requires new CLib) new!
Older version for those who do not want to install the new CLib:
RasMol icon Download RasMol 1.31b (26-bit only, some bug fixes missing)

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Last modified: 27-Nov-02