VISSIM 5.30-05 User Manual

9.2 Recording 3D Video files
Recording 3D Video files
VISSIM can record a video of a 3D simulation run using the *.AVI data file
format. To set up VISSIM to record an *.AVI file follow the steps outlined
below.
9.2.1 Recording Options
VISSIM records *.AVI files that will be played at a constant rate of 20 frames
(pictures) per second. As each simulation time step results in one picture, the
actual playback speed of the *.AVI file depends on the simulation resolution
(time steps per simulation second) during the recording: If 10 time steps are
chosen (recommended value), the playback speed will be twice as fast as
real time. When using only 1 time step, then the resulting playback speed will
be 20 times faster than real time.
Be aware that changing the simulation resolution has an impact on the
driving behavior and thus might lead to different simulation results.
There are two options provided additionally to *.AVI file recording:
► PRESENTATION - 3D-VIDEO - ANTI-ALIASING: Special algorithm to reduce
“jaggies” (i.e. pixel edges caused by the screen resolution). When this
option is used, *.AVI file recording is much slower but produces a video
file of higher quality.
► PRESENTATION - 3D-VIDEO - STEREO (2 AVIS): Produces two *.AVI files, the
second one with a slightly different camera location. This feature allows
for production of a stereoscopic movie (special equipment needed for
viewing).
9.2.2 Keyframes
In order to use different viewing locations within an *.AVI file, a predefined
set of camera locations may be used. These locations are called keyframes.
In order to use them for recording an *.AVI file, the keyframes need to be
defined prior to the recording.
Keyframes are saved in the VISSIM network file (*.INP).
9.2.2.1 Creating
In order to define keyframes, the 3D graphics mode needs to be active.
1. Set the observer position in 3D as desired for the keyframe.
2. Click PRESENTATION - 3D-VIDEO - KEYFRAMES... to call the Keyframe
window. It contains a list of all defined keyframes.
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