1

/* $Id$ */

     2

     3

/** @file landscape.h Functions related to OTTD's landscape. */

     4

     5

#ifndef LANDSCAPE_H

     6

#define LANDSCAPE_H

     7

     8

#include "core/geometry_type.hpp"

     9

#include "tile_cmd.h"

    10

#include "slope_type.h"

    11

#include "direction_type.h"

    12

    13

enum {

    14

	SNOW_LINE_MONTHS = 12,

    15

	SNOW_LINE_DAYS   = 32,

    16

};

    17

    18

struct SnowLine {

    19

	byte table[SNOW_LINE_MONTHS][SNOW_LINE_DAYS];

    20

	byte highest_value;

    21

};

    22

    23

bool IsSnowLineSet(void);

    24

void SetSnowLine(byte table[SNOW_LINE_MONTHS][SNOW_LINE_DAYS]);

    25

byte GetSnowLine(void);

    26

byte HighestSnowLine(void);

    27

void ClearSnowLine(void);

    28

    29

uint GetPartialZ(int x, int y, Slope corners);

    30

uint GetSlopeZ(int x, int y);

    31

void GetSlopeZOnEdge(Slope tileh, DiagDirection edge, int *z1, int *z2);

    32

int GetSlopeZInCorner(Slope tileh, Corner corner);

    33

Slope GetFoundationSlope(TileIndex tile, uint* z);

    34

    35

static inline Point RemapCoords(int x, int y, int z)

    36

{

    37

	Point pt;

    38

	pt.x = (y - x) * 2;

    39

	pt.y = y + x - z;

    40

	return pt;

    41

}

    42

    43

static inline Point RemapCoords2(int x, int y)

    44

{

    45

	return RemapCoords(x, y, GetSlopeZ(x, y));

    46

}

    47

    48

uint ApplyFoundationToSlope(Foundation f, Slope *s);

    49

void DrawFoundation(TileInfo *ti, Foundation f);

    50

    51

void DoClearSquare(TileIndex tile);

    52

void RunTileLoop();

    53

    54

void InitializeLandscape();

    55

void GenerateLandscape(byte mode);

    56

    57

TileIndex AdjustTileCoordRandomly(TileIndex a, byte rng);

    58

    59

#endif /* LANDSCAPE_H */