Mesh line: definition (structure)
Definition
A mesh line is defined by:
 a name (and a comment)
 a type
 specific characteristics belonging to a type
 a color
Name
The name to identify the mesh line is set by the user during the creation of this one.
A comment (optional) can be added to the name.
Types of mesh lines
The different types of mesh lines and the characteristics useful for their description are gathered in the tables below.
* see next block.
Type of mesh line  Description  

Arithmetic  Number of elements  
Absolute deviation  Value of the absolute deviation criterion expressed in meters determining the number of elements on a curve line  
Relative deviation  Value of the relative deviation criterion (0<d<1) determining the number of elements on a curve line  
Geometric with imposed number of elements  Number of elements  Geometric progression ratio (1<R<2)  
Geometric with minimum distance  Length unit  Minimum distance between nodes*  Geometric progression ratio (1<R<2)  
Length of line elements at extreme points  Length unit 
Length at extreme point 1* Length at extreme point 2* 

Linked  Transformation  
Sum of mesh lines  List of associated Mesh Lines 
A multiplying coefficient for each Mesh Line

* see next block.
Value
The mesh point value is defined using an algebraic expression that can contain:
 constants
 geometrical parameters
 basic mathematical functions using operators: +, , *, /, ( )
 usual mathematical functions admitted by FORTRAN.
The mathematical functions are described in section Functions .