Notes for using Surface Evolver on  a NeXT.

Executable file: /u/brakke/project/evolver

You have to start from a Terminal window as usual with a command line.
Much output goes to the terminal window.  Single-line prompts appear
in an attention panel, but multi-line information displays go to
the terminal.

Evolver comes up with a graphics window with a command line box under it.	
Click on the window to make Evolver the front application.  This brings
up the menus, which can do the single letter commands.  Single letter
commands can also be done by COMMAND-letter, with the letters noted
next to the menu choices.

The command line box can be used to type in any command. Any command
you can give Evolver on other systems can be used here, except s for 
show. Do not use the terminal window to type in commands.

Graphics are set to redraw every time the surface changes.  If this is 
too slow, use the Graphics submenu to toggle Auto Display.

There is no graphics command line.  Instead, the object can be rotated
with the mouse, much as in MinneView.  Hold the mouse button down and 
drag the mouse.  The axis of rotation is perpendicular to the line of
drag and the angle is proportional to the distance of drag.  The motion
only happens AFTER the mouse is released; graphics are too slow to
do a continuous rotation.

You can select points, edges, and facets interactively with the mouse.
Selected objects get their datafile line printed out.  This can be 
useful in directing queries to particular objects.  To select a vertex,
put the mouse cursor on the vertex, hold down the mouse button and hit the key
'p'.  To select an edge, select both endpoints with 'e' instead of 'p'.
To select a facet, select the three vertices with 'f'.
The closest vertex gets selected, and that includes hidden vertices.  
If you don't like the selection, click the mouse to redraw and start over.


