public void fromAngleAxis(float angle, Vector3f axis) {
        Vector3f normAxis = axis.normalize();
        fromAngleNormalAxis(angle, normAxis);
    }
Load a 3-D rotation specified by an angle and axis. If the axis is
already normalized, use
{@link #fromAngleNormalAxis(float, com.jme3.math.Vector3f)} instead
because it's more efficient.

@param angle the angle to rotate (in radians)
@param axis the axis of rotation (not null)
jme3-core/src/main/java/com/jme3/math/Matrix4f.java