GSMap Class Reference

Class that handles all map related functions. More...

Inheritance diagram for GSMap:

Static Public Member Functions
static bool	IsValidTile (TileIndex tile)
	Checks whether the given tile is valid. More...
static int	GetMapSize ()
	Gets the number of tiles in the map. More...
static int	GetMapSizeX ()
	Gets the amount of tiles along the SW and NE border. More...
static int	GetMapSizeY ()
	Gets the amount of tiles along the SE and NW border. More...
static int	GetTileX (TileIndex tile)
	Gets the place along the SW/NE border (X-value). More...
static int	GetTileY (TileIndex tile)
	Gets the place along the SE/NW border (Y-value). More...
static TileIndex	GetTileIndex (int x, int y)
	Gets the TileIndex given a x,y-coordinate. More...
static int	DistanceManhattan (TileIndex tile_from, TileIndex tile_to)
	Calculates the Manhattan distance; the difference of the X and Y added together. More...
static int	DistanceMax (TileIndex tile_from, TileIndex tile_to)
	Calculates the distance between two tiles via 1D calculation. More...
static int	DistanceSquare (TileIndex tile_from, TileIndex tile_to)
	The squared distance between the two tiles. More...
static int	DistanceFromEdge (TileIndex tile)
	Calculates the shortest distance to the edge. More...

Static Public Attributes
static const int	TILE_INVALID = INVALID_TILE.base()
	Invalid TileIndex.

Detailed Description

Class that handles all map related functions.

Member Function Documentation

DistanceFromEdge()

static int GSMap::DistanceFromEdge ( TileIndex  tile )

static

Calculates the shortest distance to the edge.

Parameters

tile	From where the distance has to be calculated.

Precondition

IsValidTile(tile).

Returns

The distances to the closest edge.

DistanceManhattan()

static int GSMap::DistanceManhattan ( TileIndex  tile_from, TileIndex  tile_to  )

static

Calculates the Manhattan distance; the difference of the X and Y added together.

Parameters

tile_from	The start tile.
tile_to	The destination tile.

Precondition

IsValidTile(tile_from).

IsValidTile(tile_to).

Returns

The Manhattan distance between the tiles.

DistanceMax()

static int GSMap::DistanceMax ( TileIndex  tile_from, TileIndex  tile_to  )

static

Calculates the distance between two tiles via 1D calculation.

This means the distance between X or the distance between Y, depending on which one is bigger.

Parameters

tile_from	The start tile.
tile_to	The destination tile.

Precondition

IsValidTile(tile_from).

IsValidTile(tile_to).

Returns

The maximum distance between the tiles.

DistanceSquare()

static int GSMap::DistanceSquare ( TileIndex  tile_from, TileIndex  tile_to  )

static

The squared distance between the two tiles.

This is the distance is the length of the shortest straight line between both points.

Parameters

tile_from	The start tile.
tile_to	The destination tile.

Precondition

IsValidTile(tile_from).

IsValidTile(tile_to).

Returns

The squared distance between the tiles.

GetMapSize()

static int GSMap::GetMapSize ( )

static

Gets the number of tiles in the map.

Returns

The size of the map in tiles.

Postcondition

Return value is always positive.

GetMapSizeX()

static int GSMap::GetMapSizeX ( )

static

Gets the amount of tiles along the SW and NE border.

Returns

The length along the SW and NE borders.

Postcondition

Return value is always positive.

GetMapSizeY()

static int GSMap::GetMapSizeY ( )

static

Gets the amount of tiles along the SE and NW border.

Returns

The length along the SE and NW borders.

Postcondition

Return value is always positive.

GetTileIndex()

static TileIndex GSMap::GetTileIndex ( int  x, int  y  )

static

Gets the TileIndex given a x,y-coordinate.

Parameters

x	The X coordinate.
y	The Y coordinate.

Returns

The TileIndex for the given (x,y) coordinate.

Postcondition

When 0 <= x && x < GetMapSizeX() && 0 <= y && y < GetMapSizeY(), then a valid tile index is returned. Otherwise it may be invalid, but could be used to calculated neighbouring tiles, e.g. tile + AIMap.GetTileIndex(-1, -1) gets the tile index of the tile to the north. But be aware that even when tile is a valid tile, the result might not be a valid tile.

GetTileX()

static int GSMap::GetTileX ( TileIndex  tile )

static

Gets the place along the SW/NE border (X-value).

Parameters

tile	The tile to get the X-value of.

Precondition

IsValidTile(tile).

Returns

The X-value.

Postcondition

Return value is always lower than GetMapSizeX().

GetTileY()

static int GSMap::GetTileY ( TileIndex  tile )

static

Gets the place along the SE/NW border (Y-value).

Parameters

tile	The tile to get the Y-value of.

Precondition

IsValidTile(tile).

Returns

The Y-value.

Postcondition

Return value is always lower than GetMapSizeY().

IsValidTile()

static bool GSMap::IsValidTile ( TileIndex  tile )

static

Checks whether the given tile is valid.

Parameters

tile	The tile to check.

Returns

True is the tile it within the boundaries of the map.