Rik's Treehouse > Babbling in Binary > My Software > Orphanware > R2DToo > R2DToo Help > For the Programmer > nbrhdVonNeumann

nbrhdVonNeumann

Declaration
Parameters
Remarks
Example
See Also

Declaration

void __stdcall nbrhdVonNeumann(
	int range,      	// range of neighbourhood
	int boundaryType	// type of boundary on world
);

Parameters

range: Range of Von Neumann neighbourhood.
boundaryType: Type of boundary to impose on world. See Remarks.

Remarks

This function is available through the API. It can be called within the model-supplied routine setNbrhd to set the neighbourhood of each agent to a Von Neumann neighbourhood of range range. This consists of all sites reachable within range steps up or down, but not diagonally (forming a diamond of maximum width 2range+1 excepting the center cell).

The neighbours are indexed from left to right and top to bottom. For example, if range=1 the neighbour indices of agent a are

	0
1	`a`	2
	3

Boundaries

Boundaries are handled by the boundaryType parameter which may be one of the following:

All borders wrap around forming a torus.

Agents at the edge have fewer neighbours.

Example

void __stdcall setNbrhd(double *param) { nbrhdVonNeumann(1,btPeriodic); }

See Also

onSimCreate, nbrhd1D, nbrhdBlocks, nbrhdCCDM, nbrhdFractal, nbrhdMoore, nbrhdRandom, nbrhdRandomER.

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Last updated: Fri Apr 30 2004, 1:42pm