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#468827 - 10/22/17 15:15 Algorithm behind vec_rotate
PadMalcom Offline
Serious User

Registered: 03/08/06
Posts: 1989
Loc: Karlsruhe
Hi, I've been searching for a way to rotate a vector as vec_rotate does it. Now I'm too curious to see the algorithm behind it. Can you explain it briefly?

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#468831 - 10/22/17 16:03 Re: Algorithm behind vec_rotate [Re: PadMalcom]
Aku_Aku Offline
User

Registered: 09/25/09
Posts: 917
Loc: Budapest
Maybe it helps: rotating...

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#468836 - 10/23/17 10:58 Re: Algorithm behind vec_rotate [Re: Aku_Aku]
Kartoffel Online
Expert

Registered: 06/11/09
Posts: 2112
Loc: Bavaria, Germany
I guess it's three consecutive "2d" rotations (pan rotates xy, tilt xz, and roll yz). I'm not sure in which order they are performed, though.
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#468838 - 10/23/17 11:33 Re: Algorithm behind vec_rotate [Re: Kartoffel]
Superku Online
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Registered: 09/13/03
Posts: 6612
Loc: Kiel (Germany)
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#468842 - 10/23/17 13:23 Re: Algorithm behind vec_rotate [Re: Superku]
jcl Online

Chief Engineer

Registered: 07/22/00
Posts: 25939
Loc: Frankfurt
Yes, that's the algorithm. The angle is converted to a rotation matrix, with which the vector is then multiplied.

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#469272 - 11/10/17 07:11 Re: Algorithm behind vec_rotate [Re: jcl]
PadMalcom Offline
Serious User

Registered: 03/08/06
Posts: 1989
Loc: Karlsruhe
Thank you all!

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