              Summary of the Versions of !Stellate

   Date   version changes
21 Dec 97 1.00    Pre-release version for  test
30 Dec 97 1.01    Allows appending output data for Stellate
                  Non-regular central areas not rotated for symmetry
22 Feb 98 1.02    As well as many bug fixes, there are many enhancements:
                  Checks for:
                    overlapping faces in the stellation diagram
                    lines measured in the wrong order in stellation diagram
                    unclosed edges in the solid
                  Combined 'Selections' window with 'Parameters' window
                  Allow back-tracking through the windows by closing
                   with 'ADJUST'
                  Radius of solid can be entered in the 'Parameters' window
                  'Descriptor' window can be turned off from main menu
                    (this also turns off text in Draw file output)
                  Lines from different components displayed with different
                   line styles
                  Selected faces in diagram are deleted by 'ADJUST' over them
                  Interactive help for menus
08 Mar 98 1.03    First released version
                  Minor improvements and bug fixes.
22 Mar 98 1.04    Polyhedra read from StellaList not checked for closure
                   since this is time consuming
                  Much tidying of code
05 May 98 1.05    Allow resizing of single stellation diagram window.
                  Printing of diagrams and polyhedra.
                  Remove restriction on whole of face being visible to the
                   first point
                    *** N.B. this means that versions 3.06 and 1.10 of
                   !PolyDraw and !PolyNet will be needed to plot solids with
                   such faces. 
                  Thicker diagram lines.
10 May 98 1.06    Selected and unselected diagram lines may have different
                   thicknesses (defined in Choices).
05 Jul 98 1.07    Bug fixes:
                   dashed lines in diagram draw file;
                   spots for disconnected edges on stellation diagrams.
06 Jan 99 1.08    New method for selecting areas of stellation diagrams.
                  Change 'front' to 'back' (and vice-versa) areas by
                    clicking over them with 'menu' ('select').
                  3D draw file has fixed size invisible surrounding box
                    (for InterGif rotating sprites).
                  Plus many minor bug fixes.
13 Jan 99 1.09    Bug causing integer divide by zero in COORDS fixed.
24 Feb 99 1.10    New method of sorting faces works much better 
                    on '59 Icosahedra'.
26 Apr 99 1.11    Allow combination of tetrahedron and cube.
                  Allow saving more than once to sloppy applications.
                  Minor bug fixes.
29 Jul 99 2.00    Allow 4 components.
 (not released)   Calculate all snub planes, now allows all uniform polyhedra
                  (I.e. all Wenninger's models).
                  Introduced 'split faces' to ease problems in plotting.
                  PolyData and 'NewLine' formats enhanced to allow split faces.
                  Allow changing line widths from top menu.
                  Allow long file names for RISC-OS 4.
17 Nov 99 2.01    New Display type 'Front/Back' 3D face colouring (see !Help)
                       (as plates in 'The fifty-nine Icosahedra')
                  Minor bug fixes
02 Mar 00 2.10    Make all finite duals of uniform polyhedra
                  from stellation diagrams
13 Apr 00 2.11    Make all duals of uniform polyhedra
                  Many minor bug fixes
29 Jun 00 2.12    Allow changing 3D window size from 'sizes' menu
                  Minor bug fixes
03 Dec 00 2.13    More guidance while making up your 'own choice' polyhedron
                  Allows changing components in 'Parameters window'
                  Dual of W115 bug fixed
                  Other minor bug fixes
04 Feb 01 2.14    Fix to face sorting to correct W54.
                  Secondary components window does not overlap diagram
                   control panel
01 Mar 01 2.15    3D window tools pane added (like PolyDraw's one)
                  A fix to counteract the worst problems from the bug in
                    FPEmulator 4.09
                  Demo version is now a disabled full version.
22 May 02 2.16    Demo works also on VirtualAcorn
                  Small fixes to display.
