How to find rotation parameter in sphere?

  • Thread starter rahman_f_t
  • Start date
  • #1
Suppose there is one circle ( signal shape ) on the sphere. then the sphere is rotate. By comparing these two circle, is it possible to find 3 rotation parameters or angles in Euler coordinate (or 2 rotation angle, sphere coordinate)?
Any idea?
Thanks
 

Answers and Replies

  • #2
HallsofIvy
Science Advisor
Homework Helper
41,833
956
One obvious difficulty is that, if the axis of rotation is perpendicular to the circle, the circle will rotate into itself. Clearly, just knowing the circle will not tell us the angle the sphere rotated.
 
  • #3
One obvious difficulty is that, if the axis of rotation is perpendicular to the circle, the circle will rotate into itself. Clearly, just knowing the circle will not tell us the angle the sphere rotated.
Suppose it is not really circle, there are curve on it ( like as wave signal on the circle). how about this time?
 

Related Threads on How to find rotation parameter in sphere?

  • Last Post
Replies
15
Views
9K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
3
Views
3K
  • Last Post
Replies
1
Views
6K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
19
Views
1K
Replies
2
Views
4K
  • Last Post
Replies
8
Views
3K
  • Last Post
Replies
2
Views
5K
  • Last Post
Replies
1
Views
2K
Top