[ODE] Successive rotations

[Hannes Norda]

Hi,
why not multiply the two rotation matrices in your application, "outside 
of ode", and then set the resulting matrix with dGeomSetRotation?

Or if you need to have a different approach you can always set one 
rotation. Then later get it with dGeomGetRotation, multiply that matrix 
with another rotation and set the resulting matrix again..

Hannes Norda


Jon Woodard wrote:
> Hi, I have a question about using ODE's rotation setting functions.
> 
>     I'm trying to build a hexagonal arena, with walls that are 'sloped' 
> outward (Imagine a very geometric salad bowl.) and I'm using 'box' 
> geometries to make the walls, one for each side.  I'm having trouble 
> doing both the rotation to make them in the form of a hexagon and sloped 
> outward, since there's only the 'setrotation' function, and no way to 
> multiply rotation matrices (that I can see in the docs, anyway) I'm 
> wondering if I can apply two direct rotations (axis-angle or euler) in a 
> row, knowing the order.  For example, be able to rotate the block into 
> hex-position first, then tip it outward, or vice versa.  Any help would 
> be greatly appreciated.
> 
> Thanks,
> -Jon Woodard
> 
> Jonathan R. A. Woodard        Phone: (734) 665-0157
> College of Engineering        Cell: (734) 355-2327
> University of Michigan        email: woodardj at umich.edu
> Ann Arbor, MI 48104        web: http://www.industrial-bloc.com
> 
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