Hi,
Using the draggerHandler (the copy of the one in osgManipulator example) to
rotate and translate a node, I need to get theses transformations to apply
it to an other node.
In the Handler, I get the previous matrix of the dragger, and after
transformation (on release) I get the other matrix.
If I print the values :
*
DISPVECT("relative trans", afterMoving.getTrans() -
_beforeMoving.getTrans());
DISPQUAT("relative rot ", afterMoving.getRotate() *
_beforeMoving.getRotate().inverse());*
It looks very good.
Next, to apply theses transformation to an osg::Plane, I use this code :
*
osg::Vec3d trans = afterMoving.getTrans() - beforeMoving.getTrans();
osg::Quat rot = afterMoving.getRotate() *
beforeMoving.getRotate().inverse();
//Create the transformation matrix to rotate and translate the plane. the
plane has its center int the center of the Dragger
osg::Matrixd m ;
m = osg::Matrixd::translate(-beforeMoving.getTrans()) *
osg::Matrixd::rotate(rot) * osg::Matrixd::translate(beforeMoving.getTrans())
* osg::Matrixd::translate(trans);
DISPVECT("relative plane trans", m.getTrans());
DISPQUAT("relative plane rot ", m.getRotate());
myPlane->transform(m);*
The value applied are not the same !
values returned :
*relative trans : 0 0 0
relative rot : 1.63503e-008 -0.461046 2.45062e-008 0.920392
relative plane trans : 3081.37 -7.26342e-005 -3422.35
relative plane rot : 1.58832e-008 -0.447874 2.38061e-008 0.894097*
The translation result looks good, but the rotation is not exactly the good
one...
Do you have any idea of where to find why there is a difference ? May be a
math problem, or a plane->transform not adapted to that kind of computation
... ?
Thanks a lot.
Regards,
Vincent.
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