Hello everyone!
I'm trying to write a Manipulator like TerrainManipulator.And My Manipulator is
written by TerrainManipulator.When I read the codes in TerrainManipulator,I
felt confused by some codes,such as:
CoordinateFrame coordinateFrame =
getCoordinateFrame(_center);
_previousUp = getUpVector(coordinateFrame);
osg::Matrixd rotation_matrix;
rotation_matrix.makeRotate(_rotation);
osg::Vec3d lookVector = -getUpVector(rotation_matrix);
osg::Vec3d upVector = getFrontVector(rotation_matrix);
CoordinateFrame coordinateFrame =
getCoordinateFrame(_center);
osg::Vec3d localUp = getUpVector(coordinateFrame);
I don't know the meaning of getCoordinateFrame.
Can anyone tell me the meaning? Thank you very much!
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