11/97

Add dynamic moving/zooming (order of difficulty):
	1) button 2 zooms: move mouse forward = in (halt drawing, translate
	   all current points to new positions, [apply each trans to each
	   point], resume drawing); move mouse backward = out (same increment;
	   halt drawing, translate all current points to new positions, [apply
	   each trans to each point], resume drawing)
	2) button 3 grabs: mouse motion translates (halt drawing, translate
	   all current points to new positions, [always store some pct off-
	   screen points for smooth transition at edges], resume drawing)
	3) button 1 grabs: mouse motion rotates (in two axes; either a) only
	   for 3-d, or b) for 2-d also by artifice of modifying a trans-
	   formation; halt drawing, translate all current points, resume
	   drawing)

Improve  color usage:
	1) allow runtime selection/determination of number of colors used

1/98

Fix up window mechanics:
	2) store pixmap (and pause draw) on iconify then use to restore


6/00

Port to Tk by using Tk's Pixmap facilities (just copy pixmap into the Tk
canvas window (winfo id .canvasPath)).

