/* $Id */ /** @file elrail_data.h Stores all the data for overhead wire and pylon drawing. @see elrail.c */ #ifndef ELRAIL_DATA_H #define ELRAIL_DATA_H /** Tile Location group. This defines whether the X and or Y coordinate of a tile is even */ typedef enum TLG { XEVEN_YEVEN = 0, XEVEN_YODD = 1, XODD_YEVEN = 2, XODD_YODD = 3, TLG_END } TLG; /** When determining the pylon configuration on the edge, two tiles are taken into account: * the tile being drawn itself (the home tile, the one in ti->tile), and the neighbouring tile */ typedef enum { TS_HOME = 0, TS_NEIGHBOUR = 1, TS_END } TileSource; enum { TRACKS_AT_PCP = 6 }; /** Which PPPs are possible at all on a given PCP */ static byte AllowedPPPonPCP[DIAGDIR_END] = { 1 << DIR_N | 1 << DIR_E | 1 << DIR_SE | 1 << DIR_S | 1 << DIR_W | 1 << DIR_NW, 1 << DIR_N | 1 << DIR_NE | 1 << DIR_E | 1 << DIR_S | 1 << DIR_SW | 1 << DIR_W, 1 << DIR_N | 1 << DIR_E | 1 << DIR_SE | 1 << DIR_S | 1 << DIR_W | 1 << DIR_NW, 1 << DIR_N | 1 << DIR_NE | 1 << DIR_E | 1 << DIR_S | 1 << DIR_SW | 1 << DIR_W, }; /** Which of the PPPs are inside the tile. For the two PPPs on the tile border the following system is used: if you rotate the PCP so that it is in the north, the eastern PPP belongs to the tile. */ static byte OwnedPPPonPCP[DIAGDIR_END] = { 1 << DIR_SE | 1 << DIR_S | 1 << DIR_SW | 1 << DIR_W, 1 << DIR_N | 1 << DIR_SW | 1 << DIR_W | 1 << DIR_NW, 1 << DIR_N | 1 << DIR_NE | 1 << DIR_E | 1 << DIR_NW, 1 << DIR_NE | 1 << DIR_E | 1 << DIR_SE | 1 << DIR_S }; /** Preferred points of each trackbit. Those are the ones perpendicular to the track, plus the point in extension of the track (to mark end-of-track).*/ static byte PreferredPPPofTrackBitAtPCP[TRACK_END][DIAGDIR_END] = { {1 << DIR_NE | 1 << DIR_SE | 1 << DIR_NW, 0xFF, 1 << DIR_SE | 1 << DIR_SW | 1 << DIR_NW, 0xFF }, /* X */ {0xFF, 1 << DIR_NE | 1 << DIR_SE | 1 << DIR_SW, 0xFF, 1 << DIR_SW | 1 << DIR_NW | 1 << DIR_NE }, /* Y */ {1 << DIR_E | 1 << DIR_N | 1 << DIR_S, 0xFF, 0xFF, 1 << DIR_W | 1 << DIR_N | 1 << DIR_S}, /* UPPER */ {0xFF, 1 << DIR_E | 1 << DIR_N | 1 << DIR_S, 1 << DIR_W | 1 << DIR_N | 1 << DIR_S, 0xFF}, /* LOWER */ {0xFF, 0xFF, 1 << DIR_S | 1 << DIR_E | 1 << DIR_W, 1 << DIR_N | 1 << DIR_E | 1 << DIR_W}, /* LEFT */ {1 << DIR_N | 1 << DIR_E | 1 << DIR_W, 1 << DIR_S | 1 << DIR_E | 1 << DIR_W, 0xFF, 0xFF}, /* RIGHT */ }; #define NUM_IGNORE_GROUPS 3 /** In case we have a staight line, we place pylon only every two tiles, so there are certain tiles which we ignore. A straight line is found if we have exactly two preferred points.*/ static byte IgnoredPCP[NUM_IGNORE_GROUPS][TLG_END][DIAGDIR_END] = { { {1 << DIR_N | 1 << DIR_S , 1 << DIR_NE | 1 << DIR_SW, 1 << DIR_NW | 1 << DIR_SE, 1 << DIR_W | 1 << DIR_E}, {0xFF , 1 << DIR_E | 1 << DIR_W, 1 << DIR_NW | 1 << DIR_SE, 1 << DIR_NE | 1 << DIR_SW}, {1 << DIR_NW | 1 << DIR_SE, 1 << DIR_NE | 1 << DIR_SW, 1 << DIR_N | 1 << DIR_S , 0xFF}, {1 << DIR_NW | 1 << DIR_SE, 0xFF , 0xFF, 1 << DIR_NE | 1 << DIR_SW} }, { {1 << DIR_E | 1 << DIR_W, 1 << DIR_N | 1 << DIR_S, 0xFF, 1 << DIR_E | 1 << DIR_W}, {0xFF, 0xFF, 1 << DIR_N | 1 << DIR_S, 1 << DIR_N | 1 << DIR_S}, {0xFF, 1 << DIR_E | 1 << DIR_W, 1 << DIR_E | 1 << DIR_W, 1 << DIR_N | 1 << DIR_S}, {1 << DIR_N | 1 << DIR_S, 1 << DIR_N | 1 << DIR_S, 0xFF, 1 << DIR_E | 1 << DIR_W} }, { {0xFF, 0xFF, 0xFF, 0xFF}, {0xFF, 0xFF, 1 << DIR_E | 1 << DIR_W, 0xFF}, {0xFF, 0xFF, 0xFF, 0xFF}, {1 << DIR_E | 1 << DIR_W, 0xFF, 0xFF, 0xFF} } }; /** Which pylons can definately NOT be built */ static byte DisallowedPPPofTrackBitAtPCP[TRACK_END][DIAGDIR_END] = { {1 << DIR_SW | 1 << DIR_NE, 0, 1 << DIR_SW | 1 << DIR_NE, 0 }, /* X */ {0, 1 << DIR_NW | 1 << DIR_SE, 0, 1 << DIR_NW | 1 << DIR_SE}, /* Y */ {1 << DIR_W | 1 << DIR_E, 0, 0, 1 << DIR_W | 1 << DIR_E }, /* UPPER */ {0, 1 << DIR_W | 1 << DIR_E, 1 << DIR_W | 1 << DIR_E, 0 }, /* LOWER */ {0, 0, 1 << DIR_S | 1 << DIR_N, 1 << DIR_N | 1 << DIR_S }, /* LEFT */ {1 << DIR_S | 1 << DIR_N, 1 << DIR_S | 1 << DIR_N, 0, 0, }, /* RIGHT */ }; typedef struct { SpriteID image; int8 x_offset; int8 y_offset; int8 x_size; int8 y_size; int8 z_size; int8 z_offset; } SortableSpriteStruct; enum { /** Distance between wire and rail */ ELRAIL_ELEVATION = 8, /** Corrects an off-by-one error in some places (tileh 12 and 9) (TODO -- find source of error) */ ELRAIL_ELEV_CORR = ELRAIL_ELEVATION + 1, /** Wires that a draw one level higher than the north corner. */ ELRAIL_ELEVRAISE = ELRAIL_ELEVATION + TILE_HEIGHT }; static const SortableSpriteStruct CatenarySpriteData[] = { /* X direction */ /* Flat tiles: */ /* Wires */ { SPR_WIRE_X_SW, 0, 8, 16, 1, 1, ELRAIL_ELEVATION }, //! 0: Wire in X direction, pylon on the SW end only { SPR_WIRE_X_NE, 0, 8, 16, 1, 1, ELRAIL_ELEVATION }, //! 1: Wire in X direction, pylon on the NE end { SPR_WIRE_X_SHORT, 0, 8, 16, 1, 1, ELRAIL_ELEVATION }, //! 2: Wire in X direction, pylon on both ends /* "up" tiles */ /* Wires */ { SPR_WIRE_X_SW_UP, 0, 8, 16, 8, 1, ELRAIL_ELEVRAISE }, //! 3: Wire in X pitch up, pylon on the SW end only { SPR_WIRE_X_NE_UP, 0, 8, 16, 8, 1, ELRAIL_ELEVRAISE }, //! 4: Wire in X pitch up, pylon on the NE end { SPR_WIRE_X_SHORT_UP, 0, 8, 16, 8, 1, ELRAIL_ELEVRAISE }, //! 5: Wire in X pitch up, pylon on both ends /* "down" tiles */ /* Wires */ { SPR_WIRE_X_SW_DOWN, 0, 8, 16, 8, 1, ELRAIL_ELEV_CORR }, //! 6: Wire in X pitch down, pylon on the SW end { SPR_WIRE_X_NE_DOWN, 0, 8, 16, 8, 1, ELRAIL_ELEV_CORR }, //! 7: Wire in X pitch down, pylon on the NE end { SPR_WIRE_X_SHORT_DOWN, 0, 8, 16, 8, 1, ELRAIL_ELEV_CORR }, //! 8: Wire in X pitch down, pylon on both ends /* Y direction */ /* Flat tiles: */ /* Wires */ { SPR_WIRE_Y_SE, 8, 0, 1, 16, 1, ELRAIL_ELEVATION }, //! 9: Wire in Y direction, pylon on the SE end only { SPR_WIRE_Y_NW, 8, 0, 1, 16, 1, ELRAIL_ELEVATION }, //!10: Wire in Y direction, pylon on the NW end { SPR_WIRE_Y_SHORT, 8, 0, 1, 16, 1, ELRAIL_ELEVATION }, //!11: Wire in Y direction, pylon on both ends /* "up" tiles */ /* Wires */ { SPR_WIRE_Y_SE_UP, 8, 0, 8, 16, 1, ELRAIL_ELEVRAISE }, //!12: Wire in Y pitch up, pylon on the SE end only { SPR_WIRE_Y_NW_UP, 8, 0, 8, 16, 1, ELRAIL_ELEVRAISE }, //!13: Wire in Y pitch up, pylon on the NW end { SPR_WIRE_Y_SHORT_UP, 8, 0, 8, 16, 1, ELRAIL_ELEVRAISE }, //!14: Wire in Y pitch up, pylon on both ends /* "down" tiles */ /* Wires */ { SPR_WIRE_Y_SE_DOWN, 8, 0, 8, 16, 1, ELRAIL_ELEV_CORR }, //!15: Wire in Y pitch down, pylon on the SE end { SPR_WIRE_Y_NW_DOWN, 8, 0, 8, 16, 1, ELRAIL_ELEV_CORR }, //!16: Wire in Y pitch down, pylon on the NW end { SPR_WIRE_Y_SHORT_DOWN, 8, 0, 8, 16, 1, ELRAIL_ELEV_CORR }, //!17: Wire in Y pitch down, pylon on both ends /* NS Direction */ { SPR_WIRE_NS_SHORT, 8, 0, 8, 8, 1, ELRAIL_ELEVATION }, //!18: LEFT trackbit wire, pylon on both ends { SPR_WIRE_NS_SHORT, 0, 8, 8, 8, 1, ELRAIL_ELEVATION }, //!19: RIGHT trackbit wire, pylon on both ends { SPR_WIRE_NS_N, 8, 0, 8, 8, 1, ELRAIL_ELEVATION }, //!20: LEFT trackbit wire, pylon on N end { SPR_WIRE_NS_N, 0, 8, 8, 8, 1, ELRAIL_ELEVATION }, //!21: RIGHT trackbit wire, pylon on N end { SPR_WIRE_NS_S, 8, 0, 8, 8, 1, ELRAIL_ELEVATION }, //!22: LEFT trackbit wire, pylon on S end { SPR_WIRE_NS_S, 0, 8, 8, 8, 1, ELRAIL_ELEVATION }, //!23: RIGHT trackbit wire, pylon on S end /* EW Direction */ { SPR_WIRE_EW_SHORT, 8, 0, 8, 8, 1, ELRAIL_ELEVATION }, //!24: UPPER trackbit wire, pylon on both ends { SPR_WIRE_EW_SHORT, 16, 8, 8, 8, 1, ELRAIL_ELEVATION }, //!25: LOWER trackbit wire, pylon on both ends { SPR_WIRE_EW_W, 8, 0, 8, 8, 1, ELRAIL_ELEVATION }, //!28: UPPER trackbit wire, pylon on both ends { SPR_WIRE_EW_W, 16, 8, 8, 8, 1, ELRAIL_ELEVATION }, //!29: LOWER trackbit wire, pylon on both ends { SPR_WIRE_EW_E, 8, 0, 8, 8, 1, ELRAIL_ELEVATION }, //!32: UPPER trackbit wire, pylon on both ends { SPR_WIRE_EW_E, 16, 8, 8, 8, 1, ELRAIL_ELEVATION }, //!33: LOWER trackbit wire, pylon on both ends /* Depots */ { SPR_WIRE_DEPOT_SW, 0, 8, 8, 1, 1, ELRAIL_ELEVATION }, //!36: Wire for SW depot exit { SPR_WIRE_DEPOT_NW, 8, 0, 1, 8, 1, ELRAIL_ELEVATION }, //!37: Wire for NW depot exit { SPR_WIRE_DEPOT_NE, 0, 8, 8, 1, 1, ELRAIL_ELEVATION }, //!38: Wire for NE depot exit { SPR_WIRE_DEPOT_SE, 8, 0, 1, 8, 1, ELRAIL_ELEVATION }, //!39: Wire for SE depot exit }; /** Refers to a certain element of the catenary. * Identifiers for Wires: *
  1. Direction of the wire
  2. *
  3. Slope of the tile for diagonals, placement inside the track for horiz/vertical pieces
  4. *
  5. Place where a pylon shoule be
* Identifiers for Pylons: *
  1. Direction of the wire
  2. *
  3. Slope of the tile
  4. *
  5. Position of the Pylon relative to the track
  6. *
  7. Position of the Pylon inside the tile
*/ typedef enum { WIRE_X_FLAT_SW, WIRE_X_FLAT_NE, WIRE_X_FLAT_BOTH, WIRE_X_UP_SW, WIRE_X_UP_NE, WIRE_X_UP_BOTH, WIRE_X_DOWN_SW, WIRE_X_DOWN_NE, WIRE_X_DOWN_BOTH, WIRE_Y_FLAT_SE, WIRE_Y_FLAT_NW, WIRE_Y_FLAT_BOTH, WIRE_Y_UP_SE, WIRE_Y_UP_NW, WIRE_Y_UP_BOTH, WIRE_Y_DOWN_SE, WIRE_Y_DOWN_NW, WIRE_Y_DOWN_BOTH, WIRE_NS_W_BOTH, WIRE_NS_E_BOTH, WIRE_NS_W_N, WIRE_NS_E_N, WIRE_NS_W_S, WIRE_NS_E_S, WIRE_EW_N_BOTH, WIRE_EW_S_BOTH, WIRE_EW_N_W, WIRE_EW_S_W, WIRE_EW_N_E, WIRE_EW_S_E, WIRE_DEPOT_SW, WIRE_DEPOT_NW, WIRE_DEPOT_NE, WIRE_DEPOT_SE, INVALID_CATENARY = 0xFF } CatenarySprite; /* This array stores which track bits can meet at a tile edge */ static const Track PPPtracks[DIAGDIR_END][TRACKS_AT_PCP] = { {TRACK_X, TRACK_X, TRACK_UPPER, TRACK_LOWER, TRACK_LEFT, TRACK_RIGHT}, {TRACK_Y, TRACK_Y, TRACK_UPPER, TRACK_LOWER, TRACK_LEFT, TRACK_RIGHT}, {TRACK_X, TRACK_X, TRACK_UPPER, TRACK_LOWER, TRACK_LEFT, TRACK_RIGHT}, {TRACK_Y, TRACK_Y, TRACK_UPPER, TRACK_LOWER, TRACK_LEFT, TRACK_RIGHT}, }; /* takes each of the 8 track bits from the array above and assigns it to the home tile or neighbour tile */ static const TileSource trackorigin[DIAGDIR_END][TRACKS_AT_PCP] = { {TS_HOME, TS_NEIGHBOUR, TS_HOME , TS_NEIGHBOUR, TS_NEIGHBOUR, TS_HOME }, {TS_HOME, TS_NEIGHBOUR, TS_NEIGHBOUR, TS_HOME , TS_NEIGHBOUR, TS_HOME }, {TS_HOME, TS_NEIGHBOUR, TS_NEIGHBOUR, TS_HOME , TS_HOME , TS_NEIGHBOUR}, {TS_HOME, TS_NEIGHBOUR, TS_HOME , TS_NEIGHBOUR, TS_HOME , TS_NEIGHBOUR}, }; /* Several PPPs maybe exist, here they are sorted in order of preference. */ static const Direction PPPorder[DIAGDIR_END][TLG_END][DIR_END] = { /* X - Y */ { /* PCP 0 */ {DIR_NE, DIR_NW, DIR_SE, DIR_SW, DIR_N, DIR_E, DIR_S, DIR_W}, /* evn - evn */ {DIR_NE, DIR_SE, DIR_SW, DIR_NW, DIR_S, DIR_W, DIR_N, DIR_E}, /* evn - odd */ {DIR_SW, DIR_NW, DIR_NE, DIR_SE, DIR_S, DIR_W, DIR_N, DIR_E}, /* odd - evn */ {DIR_SW, DIR_SE, DIR_NE, DIR_NW, DIR_N, DIR_E, DIR_S, DIR_W}, /* odd - odd */ }, {/* PCP 1 */ {DIR_NE, DIR_NW, DIR_SE, DIR_SW, DIR_S, DIR_E, DIR_N, DIR_W}, /* evn - evn */ {DIR_NE, DIR_SE, DIR_SW, DIR_NW, DIR_N, DIR_W, DIR_S, DIR_E}, /* evn - odd */ {DIR_SW, DIR_NW, DIR_NE, DIR_SE, DIR_N, DIR_W, DIR_S, DIR_E}, /* odd - evn */ {DIR_SW, DIR_SE, DIR_NE, DIR_NW, DIR_S, DIR_E, DIR_N, DIR_W}, /* odd - odd */ }, {/* PCP 2 */ {DIR_NE, DIR_NW, DIR_SE, DIR_SW, DIR_S, DIR_W, DIR_N, DIR_E}, /* evn - evn */ {DIR_NE, DIR_SE, DIR_SW, DIR_NW, DIR_N, DIR_E, DIR_S, DIR_W}, /* evn - odd */ {DIR_SW, DIR_NW, DIR_NE, DIR_SE, DIR_N, DIR_E, DIR_S, DIR_W}, /* odd - evn */ {DIR_SW, DIR_SE, DIR_NE, DIR_NW, DIR_S, DIR_W, DIR_N, DIR_E}, /* odd - odd */ }, {/* PCP 3 */ {DIR_NE, DIR_NW, DIR_SE, DIR_SW, DIR_N, DIR_W, DIR_S, DIR_E}, /* evn - evn */ {DIR_NE, DIR_SE, DIR_SW, DIR_NW, DIR_S, DIR_E, DIR_N, DIR_W}, /* evn - odd */ {DIR_SW, DIR_NW, DIR_NE, DIR_SE, DIR_S, DIR_E, DIR_N, DIR_W}, /* odd - evn */ {DIR_SW, DIR_SE, DIR_NE, DIR_NW, DIR_N, DIR_W, DIR_S, DIR_E}, /* odd - odd */ } }; /* Geometric placement of the PCP relative to the tile origin */ static const int8 x_pcp_offsets[DIAGDIR_END] = {0, 8, 15, 8}; static const int8 y_pcp_offsets[DIAGDIR_END] = {8, 15, 8, 0}; /* Geometric placement of the PPP relative to the PCP*/ static const int8 x_ppp_offsets[DIR_END] = {-3, -4, -3, 0, +3, +4, +3, 0}; static const int8 y_ppp_offsets[DIR_END] = {-3, 0, +3, +4, +3, 0, -3, -4}; /* The type of pylon to draw at each PPP */ static const SpriteID pylons_normal[] = { SPR_PYLON_EW_N, SPR_PYLON_Y_NE, SPR_PYLON_NS_E, SPR_PYLON_X_SE, SPR_PYLON_EW_S, SPR_PYLON_Y_SW, SPR_PYLON_NS_W, SPR_PYLON_X_NW }; static const SpriteID pylons_bridge[] = { SPR_PYLON_X_NW, SPR_PYLON_X_SE, SPR_PYLON_Y_NE, SPR_PYLON_Y_SW }; /* Maps a track bit onto two PCP positions */ static const byte PCPpositions[TRACK_END][2] = { {0, 2}, /* X */ {1, 3}, /* Y */ {3, 0}, /* UPPER */ {1, 2}, /* LOWER */ {2, 3}, /* LEFT */ {0, 1}, /* RIGHT */ }; /* Selects a Wire (with white and grey ends) depending on whether: a) none (should never happen) b) the first c) the second d) both PCP exists.*/ static const CatenarySprite Wires[5][TRACK_END][4] = { { /* Tileh == 0 */ {INVALID_CATENARY, WIRE_X_FLAT_NE, WIRE_X_FLAT_SW, WIRE_X_FLAT_BOTH}, {INVALID_CATENARY, WIRE_Y_FLAT_SE, WIRE_Y_FLAT_NW, WIRE_Y_FLAT_BOTH}, {INVALID_CATENARY, WIRE_EW_N_W, WIRE_EW_N_E, WIRE_EW_N_BOTH}, {INVALID_CATENARY, WIRE_EW_S_E, WIRE_EW_S_W, WIRE_EW_S_BOTH}, {INVALID_CATENARY, WIRE_NS_W_S, WIRE_NS_W_N, WIRE_NS_W_BOTH}, {INVALID_CATENARY, WIRE_NS_E_N, WIRE_NS_E_S, WIRE_NS_E_BOTH}, }, { /* Tileh == 3 */ {INVALID_CATENARY, WIRE_X_UP_NE, WIRE_X_UP_SW, WIRE_X_UP_BOTH}, {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, }, { /* Tileh == 6 */ {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, {INVALID_CATENARY, WIRE_Y_UP_SE, WIRE_Y_UP_NW, WIRE_Y_UP_BOTH}, {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, }, { /* Tileh == 9 */ {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, {INVALID_CATENARY, WIRE_Y_DOWN_SE, WIRE_Y_DOWN_NW, WIRE_Y_DOWN_BOTH}, {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, }, { /* Tileh == 12 */ {INVALID_CATENARY, WIRE_X_DOWN_NE, WIRE_X_DOWN_SW, WIRE_X_DOWN_BOTH}, {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, {INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY, INVALID_CATENARY}, } }; #endif /* ELRAIL_DATA_H */