This paper presents an intuitive pointing method for measuring the perceived direction in 3D localization experiments. The method uses a motion tracked toy-gun as pointing device and can be used from all positions in any nearly convex surrounding hull or loudspeaker setup, as the pointed direction is computed from the piercing point of the gun's direction and the surrounding surface. The reference point for the pointed direction can be chosen freely. The computation is implemented in real time open-source software and works with any 6 degrees of freedom tracking system. In this paper the accuracy of the method is measured for the static and hand-held case using 2 tracking systems in 2 rooms/surrounding hulls.
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