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ARM Club 3
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polynet_1
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!PolyNet
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!Help
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1997-07-07
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Demonstration version of !PolyNet
The PolyNet application draws a view of a polyhedron as
a 3D solid and helps you to create a planar net for it.
There may be many possible nets; if you want to print the
net, cut it out and recreate the 3D polyhedron, make the
smallest number of tabs to cut out and stick together.
(Drawfiles cannot be saved from this demo version, only
from the full one. See below for details.)
Click on !PolyNet to load it on to the icon bar.
Turn on !Help (in Apps) for continuous help over windows
Drop a polyhedron data file from the Examples directory
on to the !Polynet icon on the iconbar, to open a window
showing the solid drawn in white with black outlined faces.
The name of the polyhedron is shown in the title of the
window.
If the solid already has some 'net' data you will see an
error window, Click on the 'OK' to continue, or 'Cancel'
to ignore these old net data.
Cursor keys, 'Page up' and 'Page down' rotate the solid,
while < and > change its size, when the top bar of the 3D
window is coloured yellow. Click SELECT anywhere inside the
window to turn the top bar yellow when it is grey.
Click MENU over the icon on the icon bar for a menu
where you can read the latest version of the program
by looking at 'info', display this help, change the 'choices'
file or quit.
How to make the net
(The description assumes that the face colour choices
have not been changed.)
Click 'SELECT' over any face of the solid, which will
turn red to show it is the last face you selected. A new
'net' window opens with the face you selected rotated
into the plane of the screen and coloured red.
Click on an adjacent face in the solid to add it to the
net. The previous face turns grey in both windows to show
it has already been selected. Then click on another
adjacent face, to add it to the net. If all adjacent faces
are coloured, you can click 'Select' on a grey face
already selected in another part of the solid. This face
then turns green in both windows and you can continue
selecting faces until the net is complete. You can only
click over faces which are adjacent to the red or green one,
trying to click over others makes the program 'Beep'.
Click 'Adjust' over any face to remove it from the net; if
you pick one other than the red face it is quite likely to
make a hole in the net which is difficult to repair.
When all the solid has been made into a net, a small menu
appears which would allow you to save the net as a Draw file or
to save the data for the solid as it was read in but now
including the net. Saving is not allowed in this demo version.
The full version may be obtained by sending a cheque for £20
payable to 'Fortran Friends', to the address below.
'Fortran Friends', P.O.Box 64, Didcot, Oxon, OX11 0TH
last updated 7 July 1997