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Interactive Version of the Central Cone


  You will need to enable Java in order to use this demonstration.  

Please be patient while the applet is loaded (93K)...

Interaction Controls

Click on the "DEMO" button at the left to start the demonstation. It may take a few moments to open the windows needed for this applet. You should eventually get two new windows: the "Controls" window and the "Graph" window.

Drag with the mouse in the graph window to rotate the object.

The values in the "Controls" window affect the shape of the surface. The values of a and b control the radius of the cone, which is given by the function r(t) at the bottom of the panel. The value of c determines the width of the small tube that runs along the center of the cone. The function f(t) gives the shape of the central curve; changing this will let you make a dimensional object that is uniquely yours! The Domain value gives the lower and upper limits of t to be plugged into f.

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.

Mathematics Awareness Month is sponsored each year by the Joint Policy Board for Mathematics to recognize the importance of mathematics through written materials and an accompanying poster that highlight mathematical developments and applications in a particular area.