| Joerg Scheurich aka MUFTI 2005-05-27, 7:33 pm |
| Sorry.
For me, your post need a bit more english to understandable.
I found in a dictionary, that "racine" translates to squareroot
but it looks like, some of your mathematical symbols look very french
to me...
Is there a special french notation of mathematics ?
> How to do?
> First of all ; translation of OA
What is a OA, a 2D or a 3D vector ?
> second rotation determined by cross product;
> if OB is on X my vector for cross product are
What is a OB ?
> U | 1 AB | Racine ( Lē - Rē sinē wt )
> | 0 | 0 - R sin wt
> | 0 |0
What is U, what is AB, what is L, what is R ? wt could be a angle
resulting from a spinning object....
What means the symbol of the whole structure ? Matrix, determinate ?
Is this a lazy form with not writing down all | or 0 ?
> also I have a rotation vector
What do you mean with "rotation vector" ?
A Quaternion or a "direction multiplied with the cosinus of the angle" ?
> W = U^AB and sin RotAB = U^AB / || U ||* ||
> AB||
Should i read this as
sin(RotAB) = U^AB / ( ||U|| * ||AB|| )
???
Then it would look a bit like a formula for a cross product, if "RotAB" would
be the angle between the vectors U and AB.
But i never saw someone, who used the ^ symbol for the norm of a cross product.
All books i have seen use "A X B" or "A x B" for the cross product
and || A X B || for its norm.
> A
> |
> Soit O--C-----------B
What is a "Soit" ?
What does the whole symbol mean ?
For the whole question, maybe
http://www.web3d.org/x3d/specificat....html#Transform
| The translation, rotation, scale, scaleOrientation and center fields define a geometric 3D
| transformation consisting of (in order):
| a.a (possibly) non-uniform scale about an arbitrary point;
| b.a rotation about an arbitrary point and axis;
| c.a translation.
points in the direction, you are asking about...
so long
MUFTI
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