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Custom bridge heads: Initial implementation

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This commit is contained in:
Jonathan G Rennison
2017-02-05 18:07:10 +00:00
parent 1f727e9029
commit da177d063f
12 changed files with 433 additions and 106 deletions
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68
src/bridge_map.h
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@@ -180,4 +180,72 @@ static inline void MakeAqueductBridgeRamp(TileIndex t, Owner o, DiagDirection d)
MakeBridgeRamp(t, o, 0, d, TRANSPORT_WATER, 0);
}
/**
* Checks if this road bridge head is a custom bridge head
* @param t The tile to analyze
* @pre IsBridgeTile(t) && GetTunnelBridgeTransportType(t) == TRANSPORT_ROAD
* @return true if it is a custom bridge head
*/
static inline bool IsRoadCustomBridgeHead(TileIndex t)
{
assert(IsBridgeTile(t) && (TransportType)GB(_m[t].m5, 2, 2) == TRANSPORT_ROAD);
return GB(_m[t].m2, 0, 8) != 0;
}
/**
* Checks if this tile is a road bridge head with a custom bridge head
* @param t The tile to analyze
* @return true if it is a road bridge head with a custom bridge head
*/
static inline bool IsRoadCustomBridgeHeadTile(TileIndex t)
{
return IsBridgeTile(t) && (TransportType)GB(_m[t].m5, 2, 2) == TRANSPORT_ROAD && IsRoadCustomBridgeHead(t);
}
/**
* Returns the road bits for a (possibly custom) road bridge head
* @param t The tile to analyze
* @param rt Road type.
* @pre IsBridgeTile(t) && GetTunnelBridgeTransportType(t) == TRANSPORT_ROAD
* @return road bits for the bridge head
*/
static inline RoadBits GetCustomBridgeHeadRoadBits(TileIndex t, RoadType rt)
{
assert(IsBridgeTile(t));
if (!HasTileRoadType(t, rt)) return (RoadBits) 0;
RoadBits bits = (GB(_m[t].m5, 0, 1) ? ROAD_Y : ROAD_X) ^ (RoadBits) GB(_m[t].m2, rt == ROADTYPE_TRAM ? 4 : 0, 4);
return bits;
}
/**
* Returns the road bits for a (possibly custom) road bridge head, for all road types
* @param t The tile to analyze
* @pre IsBridgeTile(t) && GetTunnelBridgeTransportType(t) == TRANSPORT_ROAD
* @return road bits for the bridge head
*/
static inline RoadBits GetCustomBridgeHeadAllRoadBits(TileIndex t)
{
return GetCustomBridgeHeadRoadBits(t, ROADTYPE_ROAD) | GetCustomBridgeHeadRoadBits(t, ROADTYPE_TRAM);
}
/**
* Sets the road bits for a (possibly custom) road bridge head
* @param t The tile to modify
* @param rt Road type.
* @param bits The road bits.
* @pre IsBridgeTile(t) && GetTunnelBridgeTransportType(t) == TRANSPORT_ROAD
* @pre HasTileRoadType() must be set correctly before calling this
*/
static inline void SetCustomBridgeHeadRoadBits(TileIndex t, RoadType rt, RoadBits bits)
{
assert(IsBridgeTile(t));
if (HasTileRoadType(t, rt)) {
assert(bits != ROAD_NONE);
SB(_m[t].m2, rt == ROADTYPE_TRAM ? 4 : 0, 4, bits ^ (GB(_m[t].m5, 0, 1) ? ROAD_Y : ROAD_X));
} else {
assert(bits == ROAD_NONE);
SB(_m[t].m2, rt == ROADTYPE_TRAM ? 4 : 0, 4, 0);
}
}
#endif /* BRIDGE_MAP_H */