Civil Engineering Reference
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Figure 5.27 Animated structural steel erection in ARVISCOPE
5.9 Summary and conclusions
Creating real-time dynamic animations of simulated processes can help decision
makers gain a better insight of planned or continuing operations by examining the
spatial and chronological details of the animated processes from different per-
spectives and at different operation times. In this chapter, the ability of the
ARVISCOPE animation authoring language to create pervasive dynamic AR
animations of construction operations was described and demonstrated.
Creating smooth and chronologically accurate animated scenes of a simulated
operationmodeled in a DES tool requires careful assignment of time tags to discrete
events occurring during a simulation run. These time tags can then be used to
generate an animation scenario which can be interpreted by an AR visualization
application. Several steps need to be taken to create a logical link between a running
DES model and an AR animation. Firstly, an animation trace file has to be
generated. The generated trace file has to be interpreted by the AR visualization
application and required graphical representations (i.e. CAD objects) have to be
loaded and displayed in their appropriate position and orientation inside the user's
viewing frustum. Since the user of the AR application is given full mobility inside
the animation, the contents of this frustum have to be completely sensitive to
changes in user's position and head orientation. This requires the AR application to
be constantly communicating with registration devices (e.g. GPS and head orien-
tation tracker) and using their output to calculate the coordinates and update the
contents of the viewing frustum in real time.
The authors have successfully designed and implemented methods and algo-
rithms to address the above challenges in creating AR animations of simulated
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