The result of rotation matrix rotx(angle) with a coordinate does not give the desired result

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Hello All
I have a point with coordinates :
x y z : 0.00 60.00 225
and want to rotating it around the global X axis at the center 0,0,225 for 5 ° and get to the new coordinates :
x' y' z' : 0.00 59.96 225.95
the above new coordinates are in global CS and not in rotated CS
but if I use the rotx(5).* oldcoords
I don't get these values.
  6 个评论
farzad
farzad 2019-11-11
The separation angle you found is one single rotation. The rotation I defined is around x axis. Maybe your rotation is not around x axis but another axis in space
Matt J
Matt J 2019-11-11
编辑:Matt J 2019-11-11
Both v1 and v2 are in the y-z plane, so if the rotation was about the x-axis, then the separation of the two directions must be the rotation angle.

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采纳的回答

Matt J
Matt J 2019-11-11
Here's what my AxelRot utility gives
>> AxelRot([0.00 60.00 225 ].',+5,[1,0,0],[0 0 ,225])
ans =
0
59.7717
230.2293

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