Places all hosts in a rectangular grid. The usable area (constraint area minus margins on each side) is split into smaller cells (with separationX,separationY size). Hosts are placed in the middle of each cell. By default, the number of columns and rows follow the aspect ratio of the usable area. By default stepX and stepY are calculated based on the number of columns and rows.

Inheritance diagram

The following diagram shows inheritance relationships for this type. Unresolved types are missing from the diagram.

Extends

Name	Type	Description
MobilityBase	simple module	Abstract base module for mobility models.

Parameters

Name	Type	Default value	Description
subjectModule	string	"^"	module path which determines the subject module, the motion of which this mobility model describes, the default value is the parent module
coordinateSystemModule	string	""	module path of the geographic coordinate system module
displayStringTextFormat	string	"p: %p\nv: %v"	format string for the mobility module's display string text
updateDisplayString	bool	true	enables continuous update of the subject module's position via modifying its display string
constraintAreaMinX	double	-inf m	min x position of the constraint area, unconstrained by default (negative infinity)
constraintAreaMinY	double	-inf m	min y position of the constraint area, unconstrained by default (negative infinity)
constraintAreaMinZ	double	-inf m	min z position of the constraint area, unconstrained by default (negative infinity)
constraintAreaMaxX	double	inf m	max x position of the constraint area, unconstrained by default (positive infinity)
constraintAreaMaxY	double	inf m	max y position of the constraint area, unconstrained by default (positive infinity)
constraintAreaMaxZ	double	inf m	max z position of the constraint area, unconstrained by default (positive infinity)
marginX	double	0m
marginY	double	0m
numHosts	int
columns	int	int(ceil(sqrt(numHosts * (this.constraintAreaMaxX - this.constraintAreaMinX - 2 * marginX) / (this.constraintAreaMaxY - this.constraintAreaMinY - 2 * marginY))))
rows	int	int((numHosts + columns - 1) / columns)
initialZ	double	0m
separationX	double	(this.constraintAreaMaxX - this.constraintAreaMinX - 2 * marginX) / columns
separationY	double	(this.constraintAreaMaxY - this.constraintAreaMinY - 2 * marginY) / rows

Properties

Name	Value	Description
display	i=block/cogwheel
class	StaticGridMobility

Signals

Name	Type	Unit
mobilityStateChanged	inet::MobilityBase

Source code

//
// Places all hosts in a rectangular grid.
// The usable area (constraint area minus margins on each side) is split into smaller cells
// (with separationX,separationY size). Hosts are placed in the middle of each cell.
// By default, the number of columns and rows follow the aspect ratio of the usable area.
// By default stepX and stepY are calculated based on the number of columns and rows.
//
simple StaticGridMobility extends MobilityBase
{
    parameters:
        double marginX @unit(m) = default(0m);
        double marginY @unit(m) = default(0m);
        int numHosts;
        int columns = default(int(ceil(sqrt(numHosts * (this.constraintAreaMaxX - this.constraintAreaMinX - 2 * marginX) / (this.constraintAreaMaxY - this.constraintAreaMinY - 2 * marginY)))));
        int rows = default(int((numHosts + columns - 1) / columns));
        double initialZ @unit(m) = default(0m);
        double separationX @unit(m) = default((this.constraintAreaMaxX - this.constraintAreaMinX - 2 * marginX) / columns);
        double separationY @unit(m) = default((this.constraintAreaMaxY - this.constraintAreaMinY - 2 * marginY) / rows);
        @class(StaticGridMobility);
}

File: src/inet/mobility/static/StaticGridMobility.ned

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