tile_map.cpp File Reference

Global tile accessors. More...

#include "stdafx.h"
#include "tile_map.h"
#include "safeguards.h"

Go to the source code of this file.

Functions
static std::tuple< Slope, int >	GetTileSlopeGivenHeight (int hnorth, int hwest, int heast, int hsouth)
	Get a tile's slope given the height of its four corners.
std::tuple< Slope, int >	GetTileSlopeZ (TileIndex tile)
	Return the slope of a given tile inside the map.
std::tuple< Slope, int >	GetTilePixelSlopeOutsideMap (int x, int y)
	Return the slope of a given tile, also for tiles outside the map (virtual "black" tiles).
bool	IsTileFlat (TileIndex tile, int *h)
	Check if a given tile is flat.
int	GetTileZ (TileIndex tile)
	Get bottom height of the tile.
int	GetTileMaxZ (TileIndex t)
	Get top height of the tile inside the map.

Detailed Description

Global tile accessors.

Definition in file tile_map.cpp.

Function Documentation

GetTileMaxZ()

int GetTileMaxZ

(

TileIndex

t

)

Get top height of the tile inside the map.

Parameters

t	Tile to compute height of

Returns

Maximum height of the tile

Definition at line 136 of file tile_map.cpp.

References Map::MaxX(), Map::MaxY(), TileHeight(), TileX(), TileXY(), and TileY().

Referenced by AfterLoadGame(), AutoslopeCheckForEntranceEdge(), CheckBuildHouseSameZ(), CmdBuildBridge(), CmdBuildObject(), CmdPlaceHouse(), DoBuildLock(), DoClearBridge(), DrawRailCatenaryRailway(), DrawRoadBits(), DrawRoadTypeCatenary(), FindSpring(), FloodVehicleProc(), GetOtherAqueductEnd(), GetTerrainType(), GetTileMaxPixelZ(), IsStationBridgeAboveOk(), RiverMakeWider(), ShipTestUpDownOnLock(), and TryBuildTownHouse().

GetTilePixelSlopeOutsideMap()

std::tuple< Slope, int > GetTilePixelSlopeOutsideMap	(	int	x,
		int	y
	)

Return the slope of a given tile, also for tiles outside the map (virtual "black" tiles).

Parameters

x	X coordinate of the tile to compute slope of, may be outside the map.
y	Y coordinate of the tile to compute slope of, may be outside the map.
h	If not nullptr, pointer to storage of z height.

Returns

Slope of the tile, except for the HALFTILE part, and the z height of the tile.

Definition at line 78 of file tile_map.cpp.

References GetTileSlopeGivenHeight(), TILE_HEIGHT, and TileHeightOutsideMap().

Referenced by IsMapSurroundedByWater(), and ViewportAddLandscape().

GetTileSlopeGivenHeight()

static std::tuple< Slope, int > GetTileSlopeGivenHeight ( int  hnorth, int  hwest, int  heast, int  hsouth  )

static

Get a tile's slope given the height of its four corners.

Parameters

hnorth	The height at the northern corner in the same unit as TileHeight.
hwest	The height at the western corner in the same unit as TileHeight.
heast	The height at the eastern corner in the same unit as TileHeight.
hsouth	The height at the southern corner in the same unit as TileHeight.

Returns

The slope and the lowest height of the four corners.

Definition at line 23 of file tile_map.cpp.

References SLOPE_E, SLOPE_FLAT, SLOPE_N, SLOPE_S, SLOPE_STEEP, and SLOPE_W.

Referenced by GetTilePixelSlopeOutsideMap(), and GetTileSlopeZ().

GetTileSlopeZ()

std::tuple< Slope, int > GetTileSlopeZ

(

TileIndex

tile

)

Return the slope of a given tile inside the map.

Parameters

tile	Tile to compute slope of

Returns

Slope of the tile, except for the HALFTILE part, and the z height

Definition at line 55 of file tile_map.cpp.

References GetTileSlopeGivenHeight(), Map::MaxX(), Map::MaxY(), TileHeight(), TileX(), TileXY(), and TileY().

Referenced by CheckBuildableTile(), CmdBuildBridge(), CmdBuildObject(), CmdBuildTunnel(), GetBridgeHeight(), GetFoundationSlope(), GetOtherAqueductEnd(), GetTilePixelSlope(), GetTileSlope(), and RiverFlowsDown().

GetTileZ()

int GetTileZ

(

TileIndex

tile

)

Get bottom height of the tile.

Parameters

tile	Tile to compute height of

Returns

Minimum height of the tile

Definition at line 116 of file tile_map.cpp.

References Map::MaxX(), Map::MaxY(), TileHeight(), TileX(), TileXY(), and TileY().

Referenced by AfterLoadGame(), AmbientSoundEffectCallback(), CheckNewIndustry_BubbleGen(), CheckNewIndustry_Farm(), CheckNewIndustry_Forest(), CmdBuildBridge(), FlowRiver(), GenerateStationName(), GetOtherTunnelEnd(), GetTerrainType(), GetTilePixelZ(), CanalScopeResolver::GetVariable(), IndustriesScopeResolver::GetVariable(), GrowTownWithTunnel(), IsTunnelInWayDir(), LandInfoWindow::OnInit(), PlaceTreeAtSameHeight(), PlaceTreesRandomly(), RiverMakeWider(), ShipTestUpDownOnLock(), and TileLoopClearAlps().

IsTileFlat()

bool IsTileFlat	(	TileIndex	tile,
		int *	h
	)

Check if a given tile is flat.

Parameters

tile	Tile to check
h	If not nullptr, pointer to storage of z height (only if tile is flat)

Returns

Whether the tile is flat

Definition at line 95 of file tile_map.cpp.

References Map::MaxX(), Map::MaxY(), TileHeight(), TileX(), TileXY(), and TileY().

Referenced by AfterLoadGame(), CheckIfIndustryTilesAreFree(), CmdBuildBuoy(), CmdBuildDock(), CmdBuildObject(), CmdBuildShipDepot(), DoBuildLock(), FindNearestGoodCoastalTownSpot(), FindSpring(), FlowRiver(), GrowTown(), IsWateredTile(), MakeLake(), RiverMakeWider(), SetWaterClassDependingOnSurroundings(), TownCanBePlacedHere(), TryBuildLightHouse(), and TryBuildTransmitter().