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