Dear Mr. Fu-Kwun Hwang, Thank you for your reply. You are really very kind and good man. Please find attached the INITIAL, 2nd and 3rd steps of the animation I am kindly reqested. I am sory very much that I did not do it this way at my previous email. Please have answers of your questions. [color=blue]1. Does B mean the initial condition in the previous simulation I have created for you?[/color] Yes exactly. This is called gimbal lock i.e . all 3 rings are matched one into another 2. Does A mean ROLL=90 and YAW=90? I am afraid no. The all 3 rings at A should be perpendicular each other i.e. according to you previous applet: ROLL 0, PITCH 90 and YAW 90. 3. Do you want A to become initial state and the simulation change from status A to status B? Yes exactly. That is what I want. Please see tha attacments. 4. What need to be done in the simulation to show status C???
Please see tha attaxnments. Also the gimbal ring should be the same as B, i.e.gimbal lock.Also the lipid raft moved together with the CD4 receptor.
I hope that now I am correct.
With best regards and, please have my appologies for the confused first description of the applet design.
Evgeni.

[quote author=Fu-Kwun Hwang link=topic=2105.msg7877#msg7877 date=1298082842]
You can use [b][[/b]youtube=9leO28ydyfU[b]][/b] to show youtube movie as part of forum message at our site,where [u]9leO28ydyfU[/u] is the [u]id[/u] after [b]v=[/b] in the youtube URL.
e.g.

http://www.youtube.com/watch?v=9leO28ydyfU

and

http://www.youtube.com/watch?v=VOD5tuQ5wvo


Your doc file has been captured as an image file (attached).
[img]http://www.phy.ntnu.edu.tw/ntnujava/index.php?action=dlattach;topic=2105.0;attach=3911;image[/img]
However, I was not able to understand what you need.

[quote]The idea is that AIDS causing virus HIV-1 (green icozahedrons) move first from A to B and attaches to CD4 receptor via its counterpart the gp 120 in vertical position. During the movement the 3 inner gimbals (colored rings) should rotate gradually and locked i.e. match each other concentrically at the attachment.  [/quote]

1. Does B mean the initial condition in the previous simulation I have created for you?
2. Does A mean ROLL=90 and YAW=90?
3. Do you want A to become initial state and the simulation change from status A to status B?

[quote]
Then the attached HIV-1 (icosaeder) together with the CD4 receptor and the Lipid raft as well should move to the right side and attach the CCR5 co-receptor. The rings should stay at the same position as in B.[/quote]
4. What need to be done in the simulation to show status C???

Could you explain it in more detail?
[/quote]