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VISSIM 5.30-05 User Manual

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Recording 3D Video files<br />

- A sinus-linear movement starts with an increasing speed and<br />

continues with a constant speed towards the next keyframe.<br />

The latter two options can be used to define intermediate keyframe<br />

positions with no dwell time to specify the path from one keyframe to<br />

another while retaining a smooth movement.<br />

Example: If keyframe 2 is an intermediate keyframe with 0s dwell<br />

time, then the movements could be defined as:<br />

Keyframe 1: sinus-linear<br />

Keyframe 2: linear<br />

Keyframe 3: linear-sinus<br />

● Shift subsequent Keyframes: Moves the start times of all subsequent<br />

keyframes according to the current settings for the selected (new or<br />

edited) keyframe:<br />

- When inserting a new keyframe (KF) between two keyframes in the<br />

existing keyframe sequence, <strong>VISSIM</strong> checks that the start time of the<br />

new keyframe is later than the dwell time end of the previous one. If<br />

so, then <strong>VISSIM</strong> changes the start times of all subsequent keyframes<br />

by ∆t = start time new KF + dwell time new KF + movement time<br />

previous KF - start time next KF.<br />

By adapting the next KF’s start time accordingly <strong>VISSIM</strong> ensures that<br />

the (calculated) movement time to the keyframe following the new<br />

keyframe is retained. Thus it remains the same as it was before the<br />

new keyframe was inserted.<br />

- When editing an existing keyframe, all subsequent keyframes are<br />

moved to accommodate for the new start and dwell times. I.e., the<br />

start times of all subsequent keyframes are moved by ∆t = new start<br />

time - old start time + new dwell time - old dwell time.<br />

As long as option Shift subsequent Keyframes is checked, an existing<br />

keyframe cannot be moved before any previous keyframe.<br />

9.2.2.3 Editing<br />

The list of keyframes can be accessed by selecting PRESENTATION - 3D-VIDEO<br />

- KEYFRAMES... While the list is visible, only a selection of all <strong>VISSIM</strong><br />

functions, commands and hotkeys is available. Among them are the view<br />

and simulation commands so that the viewing position can be changed and<br />

the simulation can be started while the keyframe list is visible. A click on a<br />

keyframe in the list changes the camera position in the 3D network window.<br />

<strong>User</strong> <strong>Manual</strong> © PTV AG 2011 471

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