rubidium@6872: /* $Id$ */
rubidium@6872: 
rubidium@6872: /** @file map_type.h Types related to maps. */
rubidium@6872: 
rubidium@6872: #ifndef MAP_TYPE_H
rubidium@6872: #define MAP_TYPE_H
rubidium@6872: 
rubidium@6872: /**
rubidium@6872:  * Data that is stored per tile. Also used TileExtended for this.
rubidium@6872:  * Look at docs/landscape.html for the exact meaning of the members.
rubidium@6872:  */
rubidium@6872: struct Tile {
rubidium@6872: 	byte   type_height; ///< The type (bits 4..7) and height of the northern corner
rubidium@6872: 	byte   m1;          ///< Primarily used for ownership information
rubidium@6872: 	uint16 m2;          ///< Primarily used for indices to towns, industries and stations
rubidium@6872: 	byte   m3;          ///< General purpose
rubidium@6872: 	byte   m4;          ///< General purpose
rubidium@6872: 	byte   m5;          ///< General purpose
rubidium@6872: 	byte   m6;          ///< Primarily used for bridges and rainforest/desert
rubidium@6872: };
rubidium@6872: 
rubidium@6872: /**
rubidium@6872:  * Data that is stored per tile. Also used Tile for this.
rubidium@6872:  * Look at docs/landscape.html for the exact meaning of the members.
rubidium@6872:  */
rubidium@6872: struct TileExtended {
rubidium@6872: 	byte m7; ///< Primarily used for newgrf support
rubidium@6872: };
rubidium@6872: 
rubidium@6872: /**
rubidium@6872:  * An offset value between to tiles.
rubidium@6872:  *
rubidium@6872:  * This value is used fro the difference between
rubidium@6872:  * to tiles. It can be added to a tileindex to get
rubidium@6872:  * the resulting tileindex of the start tile applied
rubidium@6872:  * with this saved difference.
rubidium@6872:  *
rubidium@6872:  * @see TileDiffXY(int, int)
rubidium@6872:  */
rubidium@6872: typedef int32 TileIndexDiff;
rubidium@6872: 
rubidium@6872: /**
rubidium@6872:  * A pair-construct of a TileIndexDiff.
rubidium@6872:  *
rubidium@6872:  * This can be used to save the difference between to
rubidium@6872:  * tiles as a pair of x and y value.
rubidium@6872:  */
rubidium@6872: struct TileIndexDiffC {
rubidium@6872: 	int16 x;        ///< The x value of the coordinate
rubidium@6872: 	int16 y;        ///< The y value of the coordinate
rubidium@6872: };
rubidium@6872: 
rubidium@6872: /**
rubidium@6872:  * Approximation of the length of a straight track, relative to a diagonal
rubidium@6872:  * track (ie the size of a tile side).
rubidium@6872:  *
rubidium@6872:  * #defined instead of const so it can
rubidium@6872:  * stay integer. (no runtime float operations) Is this needed?
rubidium@6872:  * Watch out! There are _no_ brackets around here, to prevent intermediate
rubidium@6872:  * rounding! Be careful when using this!
rubidium@6872:  * This value should be sqrt(2)/2 ~ 0.7071
rubidium@6872:  */
rubidium@6872: #define STRAIGHT_TRACK_LENGTH 7071/10000
rubidium@6872: 
rubidium@6872: #endif /* MAP_TYPE_H */