Declarations

Every TCL script begins with some declarations (otherwise there is nothing that the script can manipulate).

The declarations part of a TCL script can include any of the following sections, in any order:

Constants: Gives names to commonly used values such as defining that 'normal' might take the value 0, and 'reverse' the value 1.
Sensors: How inputs are wired, and what the input lines are called.
Controls: How outputs are wired, and what the output lines are called.
Variables: What variables are used within the script.
SmartCabs: Any computer controlled throttles are declared here.
qKeys: Buttons in the qKeys window that can control the script.
strings: How string variables are declared and used.
QtuCabs: How QTUs are declared and used.
qtuconfigs: Which configuration file is used by each QTU.
Trains: How Train objects are declared and used.

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Last updated 13 Apr 2008