[Papervision3D] object/world rotation yet again :-)
skiniko7 at free.fr
Wed Aug 27 02:42:02 PDT 2008
Not sure but check this post http://blog.yam.com/milkmidi/article/16908143
http://blog.yam.com/milkmidi/article/16908143 I think it's what you need.
> Hi all,
> i've been looking over nabble posts and external sites looking for a way
> to understand rotation and apply it to a simple object.
> The kind of rootation i'm looking for can be seen here (although the
> object moves in the opposite direction i would expect it to based on the
> direction the mouse moves, but that a small problem)...
> I know many people have asked this before but i haven't seen any
> satisfactory answer on nabble yet and i've been searching for hours.
> Obviously when we rotate an object using rotationX etc the object is being
> moved on it's object rotation axis and not on a world axis.
> There must be a simple way to derive values based on the objects current
> rotation values which will enable us to determine how much we need to
> adjust each of the 3 axis so that we get the intuitive and natural
> rotation that is seen on the link above. I think this probably has
> something to do with transform matrices, but understanding them can be
> hard enough in itself.
> Can anyone give me a couple of basic steps that i need to carry out
> (hopefully with the associated methods or properties i'll need to do them)
> so that i can achieve rotation of an ogject based on world co-ordinates?
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