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Re: 3D vector rotation to the Z axis [message #73998 is a reply to message #73975]

Mon, 13 December 2010 19:23

penteado
Messages: 866
Registered: February 2018

Senior Member
Administrator

On Dec 14, 1:11 am, MartyL <mlandsf...@yahoo.com> wrote:
> I would like to rotate and arbitrary 3D vector to be aligned with the
> Z axis. I can translate and scale the vector but I can not find a
> formula to create the rotation matrix to perform the rotation. It
> sounds simple but I can't seem to find one.
> Thanks

Do you mean something like

IDL> t3d,identity(4),matrix=matrix,rotate=[45d0,0d0,0d0]
IDL> print,matrix
1.0000000 0.0000000 0.0000000 0.0000000
0.0000000 0.70710678 -0.70710678 0.0000000
0.0000000 0.70710678 0.70710678 0.0000000
0.0000000 0.0000000 0.0000000 1.0000000

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[Message index]

		Re: 3D vector rotation to the Z axis By: David Fanning on Tue, 14 December 2010 12:28
		Re: 3D vector rotation to the Z axis By: MartyL on Tue, 14 December 2010 12:20
		Re: 3D vector rotation to the Z axis By: penteado on Mon, 13 December 2010 19:23
		Re: 3D vector rotation to the Z axis By: James[2] on Thu, 16 December 2010 11:48
		Re: 3D vector rotation to the Z axis By: MartyL on Mon, 03 January 2011 17:17

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