made possible thanks to

Michael Galis http://www.compadre.org/osp/bulletinboard/TDetails.cfm?ViewType=2&TID=2226&CID=51612&#PID51613

and Wolfgang Christian http://www.compadre.org/osp/items/detail.cfm?ID=12361

**Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop.**This work is licensed under a Creative Commons Attribution 2.5 Taiwan License

- Please feel free to post your ideas about how to use the simulation for better teaching and learning.
- Post questions to be asked to help students to think, to explore.
- Upload worksheets as attached files to share with more users.

work in progress.

My own naive idea is to use analyticCurve3D but i haven't seen any example on a family of analyticCurve3D, so each is drawn as a single analyticCurve3D.

the match is close but not very accurate

http://en.wikipedia.org/wiki/Ellipse

An ellipse in general position can be expressed parametrically as the path of a point (X(t),Y(t)), where

Minimum = 0

Maximum = 2*Math.PI

Variable = "theta"

X() = "1.4+1.4*Math.cos(theta)*Math.cos(0)-1.4*Math.sin(theta)*Math.sin(0)"

z()= "0+0.5*Math.sin(theta)*Math.sin(0)-1*Math.sin(theta)*Math.cos(0)"