mirror of https://github.com/OpenTTD/OpenTTD.git
(svn r3766) Add a function to get the RoadBits from an arbitrary tile
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ebec656110
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Makefile
1
Makefile
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@ -672,6 +672,7 @@ SRCS += rail_gui.c
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SRCS += rev.c
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SRCS += road_cmd.c
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SRCS += road_gui.c
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SRCS += road_map.c
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SRCS += roadveh_cmd.c
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SRCS += roadveh_gui.c
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SRCS += saveload.c
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40
road_cmd.c
40
road_cmd.c
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@ -27,38 +27,6 @@ static bool _road_special_gettrackstatus;
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void RoadVehEnterDepot(Vehicle *v);
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static bool HasTileRoadAt(TileIndex tile, int i)
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{
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RoadBits b;
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switch (GetTileType(tile)) {
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case MP_STREET:
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switch (GetRoadType(tile)) {
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case ROAD_NORMAL: b = GetRoadBits(tile); break;
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case ROAD_CROSSING: b = GetCrossingRoadBits(tile); break;
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case ROAD_DEPOT: return (~_m[tile].m5 & 3) == i;
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default: return false;
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}
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break;
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case MP_STATION:
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return
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IS_BYTE_INSIDE(_m[tile].m5, 0x43, 0x43 + 8) &&
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(~(_m[tile].m5 - 0x43) & 3) == i;
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case MP_TUNNELBRIDGE:
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// bail out, if not a bridge middle part with road underneath
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if ((_m[tile].m5 & 0xF8) != 0xE8) return false;
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// road direction perpendicular to bridge
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b = (_m[tile].m5 & 0x01) ? ROAD_X : ROAD_Y;
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default:
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return false;
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}
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return HASBIT(b, i);
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}
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static bool CheckAllowRemoveRoad(TileIndex tile, uint br, bool *edge_road)
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{
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int blocks;
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@ -90,10 +58,10 @@ static bool CheckAllowRemoveRoad(TileIndex tile, uint br, bool *edge_road)
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// Get a bitmask of which neighbouring roads has a tile
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n = 0;
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if (blocks&0x25 && HasTileRoadAt(TILE_ADDXY(tile,-1, 0), 1)) n |= 8;
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if (blocks&0x2A && HasTileRoadAt(TILE_ADDXY(tile, 0, 1), 0)) n |= 4;
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if (blocks&0x19 && HasTileRoadAt(TILE_ADDXY(tile, 1, 0), 3)) n |= 2;
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if (blocks&0x16 && HasTileRoadAt(TILE_ADDXY(tile, 0,-1), 2)) n |= 1;
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if (blocks & 0x25 && GetAnyRoadBits(TILE_ADDXY(tile,-1, 0)) & ROAD_SW) n |= 8;
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if (blocks & 0x2A && GetAnyRoadBits(TILE_ADDXY(tile, 0, 1)) & ROAD_NW) n |= 4;
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if (blocks & 0x19 && GetAnyRoadBits(TILE_ADDXY(tile, 1, 0)) & ROAD_NE) n |= 2;
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if (blocks & 0x16 && GetAnyRoadBits(TILE_ADDXY(tile, 0,-1)) & ROAD_SE) n |= 1;
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// If 0 or 1 bits are set in n, or if no bits that match the bits to remove,
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// then allow it
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@ -0,0 +1,44 @@
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/* $Id$ */
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#include "stdafx.h"
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#include "openttd.h"
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#include "road_map.h"
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#include "station.h"
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RoadBits GetAnyRoadBits(TileIndex tile)
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{
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switch (GetTileType(tile)) {
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case MP_STREET:
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switch (GetRoadType(tile)) {
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default:
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case ROAD_NORMAL: return GetRoadBits(tile);
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case ROAD_CROSSING: return GetCrossingRoadBits(tile);
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case ROAD_DEPOT: return DiagDirToRoadBits(GB(_m[tile].m5, 0, 2));
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}
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case MP_STATION:
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if (!IsRoadStationTile(tile)) return 0;
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return DiagDirToRoadBits(GetRoadStationDir(tile));
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case MP_TUNNELBRIDGE:
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if (_m[tile].m5 & 0x80) {
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// bridge
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if (_m[tile].m5 & 0x40) {
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// middle part
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if ((_m[tile].m5 & 0x38) != 0x28) return 0; // no road under bridge
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return _m[tile].m5 & 1 ? ROAD_X : ROAD_Y;
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} else {
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// ending
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if (GB(_m[tile].m5, 1, 2) != TRANSPORT_ROAD) return 0; // not a road bridge
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return _m[tile].m5 & 1 ? ROAD_Y : ROAD_X;
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}
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} else {
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// tunnel
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if (GB(_m[tile].m5, 2, 2) != TRANSPORT_ROAD) return 0; // not a road tunnel
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return DiagDirToRoadBits(ReverseDiagDir(GB(_m[tile].m5, 0, 2)));
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}
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default: return 0;
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}
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}
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17
road_map.h
17
road_map.h
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@ -22,6 +22,12 @@ static inline RoadBits ComplementRoadBits(RoadBits r)
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return ROAD_ALL ^ r;
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}
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static inline RoadBits DiagDirToRoadBits(DiagDirection d)
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{
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return 1 << (3 ^ d);
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}
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static inline RoadBits GetRoadBits(TileIndex tile)
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{
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return GB(_m[tile].m5, 0, 4);
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@ -50,6 +56,17 @@ static inline RoadType GetRoadType(TileIndex tile)
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}
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/**
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* Returns the RoadBits on an arbitrary tile
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* Special behavior:
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* - road depots: entrance is treated as road piece
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* - road tunnels: entrance is treated as road piece
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* - bridge ramps: treated as straight road
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* - bridge middle parts: bridge itself is ignored
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*/
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RoadBits GetAnyRoadBits(TileIndex);
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static inline void MakeRoadNormal(TileIndex t, Owner owner, RoadBits bits, uint town)
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{
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SetTileType(t, MP_STREET);
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@ -244,7 +244,7 @@ static inline bool IsBuoyTile(TileIndex tile)
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/* Get's the direction the station exit points towards. Ie, returns 0 for a
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* station with the exit NE. */
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static inline byte GetRoadStationDir(TileIndex tile)
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static inline DiagDirection GetRoadStationDir(TileIndex tile)
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{
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assert(IsRoadStationTile(tile));
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return (_m[tile].m5 - 0x43) & 3;
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