public void addTimeRotationAngles(float time, float x, float y, float z) {
        addKeyFrameRotationAngles((int) (time / tpf), x, y, z);
    }
Adds a key frame for the given rotation at the given time.<br>
Rotation is expressed by Euler angles in radians.<br>
Note that the generated rotation will be stored as a quaternion and interpolated using a spherical linear interpolation (slerp)<br>
Hence, this method may create intermediate keyFrames if the interpolation angle is higher than PI to ensure continuity in animation<br>

@param time the time at which the keyFrame must be inserted
@param x the rotation around the x axis (aka yaw) in radians
@param y the rotation around the y axis (aka roll) in radians
@param z the rotation around the z axis (aka pitch) in radians
jme3-core/src/main/java/com/jme3/animation/AnimationFactory.java