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Re: IDLgrModel rotation axis's origin [message #46323]

Thu, 17 November 2005 11:33

Rick Towler
Messages: 821
Registered: August 1998

Senior Member

photosalex wrote:

> Do I understand it correct that the origin of the user-defined rotation
> axis of IDLgrModel::Rotate is always [0,0,0], that is any of such
> user-defined rotation axes passes through [0,0,0] ?

Yes. To rotate about another point you need to translate, rotate, then
translate back. For example, to rotate objects contained in oModel
about a line parallel to the Y axis passing thru [1,0,0]:

oModel -> Translate, -1, 0, 0
oModel -> Rotate, [0,1,0], 90
oModel -> Translate, 1, 0, 0

-Rick

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