Izzy Posted October 13, 2012 Report Share Posted October 13, 2012 Related to my previous thread. Imagine two points on the surface of a sphere, and you want to move Point A to Point B. Due to the nature of the problem, a single rotation suffices, as long as the new location of Point A is where Point B previously was. That is, the final orientation of the sphere is irrelevant, as long as that condition is met. How do I find the rotation axis in order to use Rodrigues' Rotation Formula? Quote Link to comment Share on other sites More sharing options...

phil1882 Posted October 14, 2012 Report Share Posted October 14, 2012 Rodriguez rotation formula assumes you have a vector and rotation axis you want to rotate about. what you currently have isn't sufficient to use that formula. if you want to move point A to point B on a sphere through rotation, there are a lot of ways to do that. here's one off the top of my head. plot a point C anywhere else on the sphere, find the plane that all three points a, b, and c lie on, find a line perpendicular to the plane that goes threw the center of the sphere, and rotate. Quote Link to comment Share on other sites More sharing options...

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