Civil Engineering Reference
In-Depth Information
execution of a DES model typically takes a few seconds, the generated animation
trace file can contain several thousand lines, depending on the duration of the
operation, the number of activities to be performed, and the level of detail desired
in animating each activity in ARVISCOPE. The resulting trace file is a sequence
of ARVISCOPE language statements ordered by their time stamp of execution.
The trace files were then used to create AR animations to visualize the simulated
(and communicated) operations in the 3D augmented environment of the con-
struction site. In the following sections the details of outdoor visualizations
performed using the ARVISCOPE animation authoring language running on a
mobile AR computing backpack, also designed by the authors, are described.
5.8.1 Offshore concrete delivery operation
The aerial view of an outdoor experiment conducted in this research is shown in
Figure 5.20. The objective of this experiment was to create an animation of an
offshore concrete delivery operation. The animation involved two 3D virtual
barges, each carrying a virtual concrete truck from a virtual batch plant on the
shore to an offshore pier located in the middle of a river. Real-time views of
the Huron river in Ann Arbor, Michigan, were used for the real background. Each
barge spent a certain amount of time on the shore while its concrete truck was
loaded at the batch plant. It then traveled to the offshore pier to unload the
concrete. The empty concrete truck then returned to the shore on the barge. This
cycle was repeated several times before the concrete placement operation ended.
The global coordinates of points
P
1
through
P
6
in Figure 5.20 were carefully
measured in terms of longitude, latitude, and altitude and used inside the
corresponding animation trace file to define delivery and returning routes as
Figure 5.20 Aerial view of the offshore concrete delivery operation experiment
Search WWH ::
Custom Search