Hello Josef,
Josef Grunig wrote:
> Hi,
>
> I'm computing bounding boxes on nodes in this way:
>
> Pnt3f min, max;
> DynamicVolume volume;
> node->getWorldVolume(volume);
> volume.getBounds( min, max );
>
> then building 6 planes using min and max; The resulting BoundingBox
> geometry is attached to the root node (I've a valid reason for not
> attaching it as a child of the bounded node)
the BoxVolume (which is inside the DynamicVolume) returned by
getWorldVolume is axis aligned in world coordinates; it is not just the
local box transformed to world coordinates, which seems to be what you
are looking for, right ?
> Boxes are OK as long as I set translations and scaling. when applying
> a rotation boxes stretch and look like as they get scaled... any
> reason for that? Am I computing the box volume correctly?
The volume you compute has to accommodate the rotated object and still
be axis aligned, therefore it has to grow when the rotates.
To transform the local volume to world coordinates, construct your
planes with the bounds of the getVolume() volume and then transform them
to world coordinates by applying the getToWorld() matrix.
Hope it helps,
Carsten
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