How to use
Enter a function f1(, ) in the text input field marked "f(t,s)=".
(Type "t" for , and type "s" for .)

    Example: f (,)=5

Click the "Graph" button (this button also refreshes the graph).

Rotate the graph by clicking and dragging the mouse on the graph.

To erase the graph and all input fields, click the "Clear" button.

 Sphere: f (,)=5

 Cylinder: f (,)=3/sin 

 Plane: f (,)= 3/(cos  sin )

Other Notes
Surfaces in three dimensions are represented in "wireframe" form. The "faceted hidden surface" representation allows for more than one surface to be drawn.