DPGraph, by David Parker (<-google)

[For optimal use of DPGraph (dpg) you need to be able to save/edit text 
files in the dpg directory.]

To download dpg to a pc, google DPGraph, and evoke UIUC licence. Without a 
licence you can download a dpg player, but cannot edit and create new scripts.
The unlicensed player can replay your binary files created by dpg.

Open the cover animation and check for its ASPECT RATIO by using arrow keys 
to turn image so that the cone faces you. 
Change aspect ratio of the window until the base of the cone looks circular. 

MATH:  graph3d(a*x^2+b*y^2+sin(c*time)=d*z^2  is what in math notation?

SCROLLBAR: Note that a=b=b=c=1, what happens if you change these?
   1. Image Parameter: X-slice > arrows(no mouse) > move scrollbar
   2. D-variable: what does d=0, d<0 mean?

MATH: Discuss Conic Sections and Quadric Surfaces. (Separate Lesson on W2)
  
ANIMATE: 
  0. You've already seen how the "time" variable works.
  1. "Scrollbar" for one paramater at a time.
  2. Slider
  3. 3D-view with the arrow keys for an x- and y-rotation, no z-rotation.
     Question: Can you see every aspect of an object with the arrows?

HELP: This is (pleasantly) rudimentary documentation in the style of the
     classical "man pages". Then you experiment. Keep track of what you 
     discover in your Journal.

CLIPBOARD: Copy and Paste using the clipboard. Don't drag and drop, at 
     least I had a problem with that.

EDIT: 1. See the script for the cover animation, by 
         Save> Desktop > As text file > open in Winedit.
      2. Look at the script with ALL OPTIONS called "default.dpg"
         
While the EDIT popup has a tiny window into the script, it is generally 
better to SAVE as a textfile, open it in Wordpad, edit it, save the edit,
and press the EXECUTE button in dpg to see the effect of your edit.