70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
#include "stdafx.h"
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#include "openttd.h"
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#include "functions.h"
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#include "rail_map.h"
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#include "road.h"
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#include "road_map.h"
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#include "water_map.h"
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#include "macros.h"
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bool IsPossibleCrossing(const TileIndex tile, Axis ax)
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{
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return (IsTileType(tile, MP_RAILWAY) &&
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!HasSignals(tile) &&
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GetTrackBits(tile) == (ax == AXIS_X ? TRACK_BIT_Y : TRACK_BIT_X) &&
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GetTileSlope(tile, NULL) == SLOPE_FLAT);
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}
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RoadBits CleanUpRoadBits(const TileIndex tile, RoadBits org_rb)
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{
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for (DiagDirection dir = DIAGDIR_BEGIN; dir < DIAGDIR_END; dir++) {
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const TileIndex neighbor_tile = TileAddByDiagDir(tile, dir);
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/* Get the Roadbit pointing to the neighbor_tile */
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const RoadBits target_rb = DiagDirToRoadBits(dir);
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/* If the roadbit is in the current plan */
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if (org_rb & target_rb) {
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bool connective = false;
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const RoadBits mirrored_rb = MirrorRoadBits(target_rb);
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switch (GetTileType(neighbor_tile)) {
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/* Allways connective ones */
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case MP_CLEAR: case MP_TREES:
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connective = true;
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break;
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/* The conditionaly connective ones */
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case MP_TUNNELBRIDGE:
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case MP_STATION:
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case MP_ROAD: {
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const RoadBits neighbor_rb = GetAnyRoadBits(neighbor_tile, ROADTYPE_ROAD) | GetAnyRoadBits(neighbor_tile, ROADTYPE_TRAM);
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/* Accept only connective tiles */
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connective = (neighbor_rb & mirrored_rb) || // Neighbor has got the fitting RoadBit
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CountBits(neighbor_rb) == 1; // Neighbor has got only one Roadbit
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} break;
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case MP_RAILWAY:
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connective = IsPossibleCrossing(neighbor_tile, DiagDirToAxis(dir));
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break;
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case MP_WATER:
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/* Check for real water tile */
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connective = !IsWater(neighbor_tile);
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break;
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/* The defentetly not connective ones */
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default: break;
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}
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/* If the neighbor tile is inconnective remove the planed road connection to it */
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if (!connective) org_rb ^= target_rb;
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}
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}
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return org_rb;
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}
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