Hi,

I am dealing with a task of orienting and positioning one object relative to 
another(the same object as the manipulated one,but has different position and 
orientation). And when the task is finished, I wanna  compute the 
deviation(both position and orienting). For the orientation, I want to get the 
angle and axis.

I'm so confused with the Local coordinate and World coordinate in OSG. 

I know maybe I should define a vector  under the object local coordinate and 
rotate translate the vector as well as the object is being manipulated.And do 
some math with the vector under the world coordinate to get the angle and axis. 

Can someone give me some advice?

Thank you! Thanks a lot!

Cheers,
Jiechang :D

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http://forum.openscenegraph.org/viewtopic.php?p=70732#70732





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