Introduction

Command Files
Entity Types
HyperMesh entities are often used as string parameters in commands that act directly on entities in some fashion, such as creating filtered sets that contain only a specific entity type.
Marks
Marks specify groups of entities that are transferred to the command processor. Marks can be created for most entities, and commands are then issued to perform operations on the entities on the mark. HyperMesh allows for two standard marks and a user mark.
Vectors and Planes
At times, it is necessary to define a vector or plane for a command. HyperMesh allocates two vectors and two planes with the IDs 1 and 2. The vectors and planes can be defined at any time during the processing of a command file or Tcl script.
Data Names
Data names are used to access data from the HyperMesh database. A data name is a string that represents a piece of data. They are basically generic references to the information that physically defines an entity in the HyperMesh environment.
Tcl/Tk
Tcl (Tool Command Language), commonly pronounced “tickle”, is a scripting language like Perl, JavaScript, Born, and Korn. Scripting languages are easy to use and learn because they have a syntax that is easy to read, are platform independent, and don’t require compiling.
Utility Menu
The HyperMesh Utility menu allows you to customize the standard interface to create controls that include function buttons, radio options, and text that have command files and Tcl/Tk scripts associated with them.

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