Chapter 4

McIDAS-X Utilities

This chapter describes many of the McIDAS-X library functions that you will use when writing your applications programs. These utility functions perform a variety of common programming tasks, such as:

Acquiring command line parameters and pointing device status
Displaying text, images and graphics on McIDAS-X windows
Determining the number of display frames
Converting physical units such as kilometers to nautical miles
Computing meteorological parameters such as potential temperature

This chapter is organized into these sections:

Overview
User interface utilities

Command line
Pointing device
Display utilities

Text messages
Images
Graphics
Display characteristics
System utilities

String tables
User Common
Starting McIDAS-X commands from applications
Missing Value codes
Error handling
Suspending applications
File locks
Conversion utilities

Byte- and word-level manipulation
Character string manipulation
Day and time
Latitude and longitude
Physical units
Scientific utilities

Computing isentropic surfaces
Computing Heat Index
Computing Relative Humidity
Computing Wind Chill
Computing mixing ratio
Computing stability parameters

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