Package repast.simphony.space.grid
Interface Grid<T>
 All Superinterfaces:
Projection<T>
 All Known Implementing Classes:
AbstractGrid
,ContextFastSingleGrid
,ContextGrid
,DefaultGrid
,FastDenseSingleOccuGrid
,Projected3DGrid
Interface for classes implementing grid type projection space.
 Author:
 Nick Collier

Method Summary
Modifier and TypeMethodDescriptiongetAdder()
Gets the adder used by this space to add new objects.Gets the cell accessor used to control access to individual grid cells.Gets the dimensions of the space.double
getDistance
(GridPoint point1, GridPoint point2) Returns the distance between the GridPoints point1 and point2, taking into account the space's topology.double
getDistanceSq
(GridPoint point1, GridPoint point2) Returns the square of the distance between the GridPoints point1 and point2, taking into account the space's topology.Retrieves the rule being used for controlling what happens at or beyond the borders of the space.getLocation
(Object obj) Gets the location of the specified object.getObjectAt
(int... location) Gets the object at the specified location.Gets all the object currently in the space.getObjectsAt
(int... location) Gets all the objects at the specified location.getRandomObjectAt
(int... location) Gets a random object from among those at the specified location.boolean
True if this grid is peri0dic (in the sense that moving off one border makes you appear on the other one), otherwise false.moveByDisplacement
(T object, int... displacement) Moves the specified object from its current location by the specified amount.moveByVector
(T object, double distance, double... anglesInRadians) Moves the specified object the specified distance from its current position along the specified angle.boolean
Moves the specified object from its current location to the new location.void
Sets the adder used by this space to add new objects.void
Sets the rule to use for controlling what happens at or beyond the borders of the space.int
size()
Gets the number of objects currently in the space.Methods inherited from interface repast.simphony.space.projection.Projection
addProjectionListener, evaluate, getName, getProjectionListeners, removeProjectionListener

Method Details

getDimensions
GridDimensions getDimensions()Gets the dimensions of the space. Returns:
 the dimensions of the space.

setAdder
Sets the adder used by this space to add new objects. Parameters:
adder
 the adder

getAdder
Gets the adder used by this space to add new objects. Returns:
 the adder used by this space to add new objects.

moveTo
Moves the specified object from its current location to the new location. The object must previously have been introduced into the space. Objects are introduced into the space by adding them to the context of which this space is a projection. Parameters:
object
newLocation
 Returns:
 true if the move was successful, otherwise false.
 Throws:
SpatialException
 if the object is not already in the space, if the number of dimensions in the location does not agree with the number in the space, or if the object is moved outside the grid dimensions.

getLocation
Gets the location of the specified object. Parameters:
obj
 Returns:
 the location of the specified object or null if the object is not in the space.

size
int size()Gets the number of objects currently in the space. This does NOT include any objects that may have been added, but have NOT been moved to a space location. Returns:
 the number of objects currently in the space. This does NOT include any objects that may have been added, but have NOT been moved to a space location.

getGridPointTranslator
GridPointTranslator getGridPointTranslator()Retrieves the rule being used for controlling what happens at or beyond the borders of the space. Returns:
 the rule for handling out of bounds coordinates

getCellAccessor
CellAccessor getCellAccessor()Gets the cell accessor used to control access to individual grid cells. Returns:
 the cell accessor used to control access to individual grid cells.

setGridPointTranslator
Sets the rule to use for controlling what happens at or beyond the borders of the space. Parameters:
rule
 the rule for handling out of bounds coordinates

getObjects
Gets all the object currently in the space. This does NOT include any objects that may have been added, but have NOT been moved to a space location. Returns:
 an iteratable over all the object currently in the space. This does NOT include any objects that may have been added, but have NOT been moved to a space location.

getObjectAt
Gets the object at the specified location. Parameters:
location
 Returns:
 the object at the specified location.

getObjectsAt
Gets all the objects at the specified location. For a multi occupancy space this will be all the objects at that location. For a single occupancy space this will be the single object at that location. Parameters:
location
 Returns:
 the object at the specified location.

getRandomObjectAt
Gets a random object from among those at the specified location. If this is a single occupancy space this will return the single object at that location, if any. Parameters:
location
 Returns:
 the object at the specified location.

moveByDisplacement
Moves the specified object from its current location by the specified amount. For examplemoveByDisplacement(object, 3, 2, 1)
will move the object by 3 along the xaxis, 2 along the y and 1 along the z. The displacement argument can be less than the number of dimensions in the space in which case the remaining argument will be set to 0. For example,moveByDisplacement(object, 3)
will move the object 3 along the xaxis and 0 along the y and z axes, assuming a 3D grid. Parameters:
object
 the object to movedisplacement
 the amount to move the object Returns:
 the new location if the move was successful, otherwise null
 Throws:
SpatialException
 if the object is not already in the space or if the number of dimensions in the displacement greater than the number of grid dimensions.

moveByVector
Moves the specified object the specified distance from its current position along the specified angle. For example,moveByVector(object, 1, Direction.NORTH)
will move the object 1 unit "north" up the yaxis, assuming a 2D grid. Similarly,grid.moveByVector(object, 2, 0, Math.toRadians(90), 0)
will rotate 90 degrees around the yaxis, thus moving the object 2 units along the zaxis. Note that the radians / degrees are incremented in a anticlockwise fashion, such that 0 degrees is "east", 90 degrees is "north", 180 is "west" and 270 is "south." Parameters:
object
 the object to movedistance
 the distance to moveanglesInRadians
 the angle to move along in radians. Note that Math.toRadians(degrees) is useful here Returns:
 the new location or null if the move is not successful
 Throws:
SpatialException
 if the object is not already in the space or if the number of angles is greater than the number of dimensions See Also:

isPeriodic
boolean isPeriodic()True if this grid is peri0dic (in the sense that moving off one border makes you appear on the other one), otherwise false. A 2D periodic grid is a torus. This is defined by the grid's border behavior which is determined by its GridPointTranslator. Returns:
 true if this grid is periodic, otherwise false.

getDistance
Returns the distance between the GridPoints point1 and point2, taking into account the space's topology. Parameters:
point1
 the first pointpoint2
 the second point Returns:
 the distance between the two points

getDistanceSq
Returns the square of the distance between the GridPoints point1 and point2, taking into account the space's topology. Parameters:
point1
 the first pointpoint2
 the second point Returns:
 the square of the distance between the two points
