Hi, it's been a while, but IIRC the cross product of the two normalized vectors will give you the rotation vector, and the acos of the dot product is the rotation angle. Convert that into a quaternion (much, much easier than it sounds), that quaternion into a rotation matrix, and extract the Euler angles from that one. I might be wrong, though.
In any case, have a look at these two FAQs: <http://www.j3d.org/matrix_faq/> They'll walk you through all the necessary steps and will answer pretty much every question you might have regarding these issues. Extremely helpful resource. Mark On 9/1/06, Seb L <[EMAIL PROTECTED]> wrote:
I have a simulated cable in 3D, and all I have a 3D plug attached to the end of the cable. My 3D plug object stores its rotation as 3 euler angles. I need to work out what those angles should be so that they point in the same direction as the end of the cable. I have the cable direction as a 3D Vector. I guess this same calculation could be used to work out how to point the camera at a particular object. thanks! Seb On 01/09/06, Alias™ <[EMAIL PROTECTED]> wrote: > What are you trying to do? Do you want to tween from one 3d > position/rotation to another? > > How are you representing your objects? > > Alias > > On 01/09/06, Seb L <[EMAIL PROTECTED]> wrote: > > > > ... any crazy geniuses out there know how to generate euler angles for > > a 3D vector? Or i guess to calculate the rotation angles between 2 3D > > vectors? Any pointers would be greatly appreciated. I am losing it > > now... :-) > > > > cheers! > > > > Seb > > _______________________________________________ > > [email protected] > > To change your subscription options or search the archive: > > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders > > > > Brought to you by Fig Leaf Software > > Premier Authorized Adobe Consulting and Training > > http://www.figleaf.com > > http://training.figleaf.com > > > _______________________________________________ > [email protected] > To change your subscription options or search the archive: > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders > > Brought to you by Fig Leaf Software > Premier Authorized Adobe Consulting and Training > http://www.figleaf.com > http://training.figleaf.com > _______________________________________________ [email protected] To change your subscription options or search the archive: http://chattyfig.figleaf.com/mailman/listinfo/flashcoders Brought to you by Fig Leaf Software Premier Authorized Adobe Consulting and Training http://www.figleaf.com http://training.figleaf.com
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