An 11-segment computer simulation model of aerial movement was used to generate a set of configuration and orientation angles for a double straight somersault with a full twist in the second somersault (back-in full-out). Computer graphics were generated in realtime using OpenInventor from a virtual head-mounted camera and were rendered at 50 Hz to a Trivisio 3scope stereo Head Mounted Display worn by the user to give a trampolinist's view. Changes in orientation of the user's head in the real world were detected by a 3D-Bird sensor and were reflected in real-time movements of the head of the virtual trampolinist. The system allowed continuous repetition of the trampoline skill and was tested by several elite gymnasts who learned the correct head movement at a reduced speed before increasing to half actual performance speed.
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