Please be patient while the applet is loaded (93K)...
Click on the ">>" button to animate the building up of the cone through its different dimensional parts. Each new part will stretch out, accordian-like, as the t-value increases.
Warning: this demonstration can be quite slow; please be patient. Not much will happen at first, as the zero-dimensional section grows.
You may use the "Graphics" menu of the graph window to control some of the visual characteristics of your image. For example, you can thicken the lines, or make the surface be filled in (rather than outlined). Use the "Control" menuof the graph window to zoom out if the surface is too large to fit entirely in the window.
When you are done with the demonstration, choose the "Exit Demo" menu item from the "Windows" menu of the "Controls" window. The applet will not exit until you do so.