![](bg8.png)
Finally, 45 different experts tested the simulator
configured with the previously calculated number of
cubes and the parameters selected by the experts.
Then, they filled a questionnaire about their
impression and their answers showed that the
perceptual error induced by the simplification of the
physics equations and the washout algorithm is low
enough for us to be able to use the simulator for
training purposes.
Future work includes an analytical assessment of
the physics equations by means of an analytical
comparison with real data. A study to find the
optimal number of cubes (the one that maximizes
the ratio presence/CPU usage) could also be
performed. Alternatives to our model, such as
empirical models, can also be studied, designed and
compared. The contribution and correlation of each
of the simulator subsystems (visual system, physics
model, inertial generator, etc) to the overall presence
can also be studied separately. Finally, as our model
is not empirically based, future research could test
the application of the developed equations to
simulate different kinds of vessels.
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