Snowline functions and data structures

Data Structures
struct	SnowLine
	Structure describing the height of the snow line each day of the year. More...

Functions
bool	IsSnowLineSet ()
	Has a snow line table already been loaded.
void	SetSnowLine (uint8_t table[SNOW_LINE_MONTHS][SNOW_LINE_DAYS])
	Set a variable snow line, as loaded from a newgrf file.
uint8_t	GetSnowLine ()
	Get the current snow line, either variable or static.
uint8_t	HighestSnowLine ()
	Get the highest possible snow line height, either variable or static.
uint8_t	LowestSnowLine ()
	Get the lowest possible snow line height, either variable or static.
void	ClearSnowLine ()
	Clear the variable snow line table and free the memory.

Variables
static SnowLine *	_snow_line = nullptr
	Description of the snow line throughout the year.

Detailed Description

Function Documentation

ClearSnowLine()

void ClearSnowLine

(

)

Clear the variable snow line table and free the memory.

Definition at line 641 of file landscape.cpp.

References _snow_line, and free().

Referenced by ResetNewGRFData().

GetSnowLine()

uint8_t GetSnowLine

(

)

Get the current snow line, either variable or static.

Returns

the snow line height.

Definition at line 609 of file landscape.cpp.

References _settings_game, _snow_line, TimerGameCalendar::ConvertDateToYMD(), TimerGameCalendar::date, GameSettings::game_creation, GameCreationSettings::snow_line_height, and SnowLine::table.

Referenced by TownViewWindow::DrawWidget(), GetGlobalVariable(), GetTerrainType(), PlaceTreesRandomly(), SplitGroundSpriteForOverlay(), TileLoopClearAlps(), and UpdateTownGrowth().

HighestSnowLine()

uint8_t HighestSnowLine

(

)

Get the highest possible snow line height, either variable or static.

Returns

the highest snow line height.

Definition at line 622 of file landscape.cpp.

References _settings_game, _snow_line, GameSettings::game_creation, SnowLine::highest_value, and GameCreationSettings::snow_line_height.

Referenced by CheckNewIndustry_Farm(), CheckNewIndustry_Forest(), and TryBuildTownHouse().

IsSnowLineSet()

bool IsSnowLineSet

(

)

Has a snow line table already been loaded.

Returns

true if the table has been loaded already.

Definition at line 580 of file landscape.cpp.

References _snow_line.

Referenced by GlobalVarChangeInfo().

LowestSnowLine()

uint8_t LowestSnowLine

(

)

Get the lowest possible snow line height, either variable or static.

Returns

the lowest snow line height.

Definition at line 632 of file landscape.cpp.

References _settings_game, _snow_line, GameSettings::game_creation, SnowLine::lowest_value, and GameCreationSettings::snow_line_height.

Referenced by TownViewWindow::DrawWidget(), and TownViewWindow::GetDesiredInfoHeight().

SetSnowLine()

void SetSnowLine

(

uint8_t

table[SNOW_LINE_MONTHS][SNOW_LINE_DAYS]

)

Set a variable snow line, as loaded from a newgrf file.

Parameters

table

the 12 * 32 byte table containing the snowline for each day

Definition at line 590 of file landscape.cpp.

References _snow_line, SnowLine::highest_value, SnowLine::lowest_value, SNOW_LINE_DAYS, SNOW_LINE_MONTHS, and SnowLine::table.

Referenced by GlobalVarChangeInfo().

Variable Documentation

_snow_line

SnowLine* _snow_line = nullptr

static

Description of the snow line throughout the year.

If it is nullptr, a static snowline height is used, as set by _settings_game.game_creation.snow_line_height. Otherwise it points to a table loaded from a newGRF file that describes the variable snowline.

See also

GetSnowLine() GameCreationSettings

Definition at line 96 of file landscape.cpp.

Referenced by ClearSnowLine(), GetSnowLine(), HighestSnowLine(), IsSnowLineSet(), LowestSnowLine(), and SetSnowLine().