Hi,
I have a moving model located in a CoordinateSystemNode with a default
EllipsoidModel. The goal is that the model is rotated into the direction which
it is moving. My current code looks like this:
Code:
osg::Matrixd ModelPositionCallback::calculatePositionMatrix(
const osg::EllipsoidModel* ellipsoid,
const osg::Vec3d &newPosition,
const osg::Vec3d &oldPosition)
{
osg::Vec3d up = ellipsoid->computeLocalUpVector(newPosition.x(),
newPosition.y(), newPosition.z());
osg::Vec3d forward = newPosition - oldPosition;
forward.normalize();
osg::Quat rotation;
rotation.makeRotate(up, forward);
osg::Matrixd matrix;
matrix.makeTranslate(newPosition);
matrix.preMultRotate(rotation);
return matrix;
}
The problem is, that the rotation obviously depends on the model's position
within the CoordinateSystemNode / EllipsoidModel, hence the model doesn't head
in the right direction right now. It is probably pretty simple to do -- but
I've searched the forum and googled for this but I still have no clue on how to
solve this... any ideas?
Thank you!
Cheers,
Michael
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=18695#18695
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