cpp/openttd-patchpack/source Files · src/road.cpp

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Location: cpp/openttd-patchpack/source/src/road.cpp

r7939:523d421f9d0c 1.9 KiB text/x-c Show Annotation Show as Raw Download as Raw

egladil

(svn r11492) -Codechange: [OSX] Split the cocoa video driver into several files. The reason for this is that the fullscreen and windowed mode api are separate from each other in OS X and thus the driver actual is two drivers in one. This split is to make the code more readable and to prepare for replacing the Quickdraw windowed mode code which uses apis deprecated as of OS X 10.5 (and maybe earlier).

#include "stdafx.h"
#include "openttd.h"
#include "functions.h"
#include "rail_map.h"
#include "road.h"
#include "road_map.h"
#include "water_map.h"
#include "macros.h"

bool IsPossibleCrossing(const TileIndex tile, Axis ax)
{
	return (IsTileType(tile, MP_RAILWAY) &&
		!HasSignals(tile) &&
		GetTrackBits(tile) == (ax == AXIS_X ?  TRACK_BIT_Y : TRACK_BIT_X) &&
		GetTileSlope(tile, NULL) == SLOPE_FLAT);
}

RoadBits CleanUpRoadBits(const TileIndex tile, RoadBits org_rb)
{
	for (DiagDirection dir = DIAGDIR_BEGIN; dir < DIAGDIR_END; dir++) {
		const TileIndex neighbor_tile = TileAddByDiagDir(tile, dir);

		/* Get the Roadbit pointing to the neighbor_tile */
		const RoadBits target_rb = DiagDirToRoadBits(dir);

		/* If the roadbit is in the current plan */
		if (org_rb & target_rb) {
			bool connective = false;
			const RoadBits mirrored_rb = MirrorRoadBits(target_rb);

			switch (GetTileType(neighbor_tile)) {
				/* Allways connective ones */
				case MP_CLEAR: case MP_TREES:
					connective = true;
					break;

				/* The conditionaly connective ones */
				case MP_TUNNELBRIDGE:
				case MP_STATION:
				case MP_ROAD: {
					const RoadBits neighbor_rb = GetAnyRoadBits(neighbor_tile, ROADTYPE_ROAD) | GetAnyRoadBits(neighbor_tile, ROADTYPE_TRAM);

					/* Accept only connective tiles */
					connective = (neighbor_rb & mirrored_rb) || // Neighbor has got the fitting RoadBit
							CountBits(neighbor_rb) == 1; // Neighbor has got only one Roadbit

				} break;

				case MP_RAILWAY:
					connective = IsPossibleCrossing(neighbor_tile, DiagDirToAxis(dir));
					break;

				case MP_WATER:
					/* Check for real water tile */
					connective = !IsWater(neighbor_tile);
					break;

				/* The defentetly not connective ones */
				default: break;
			}

			/* If the neighbor tile is inconnective remove the planed road connection to it */
			if (!connective) org_rb ^= target_rb;

		}
	}

	return org_rb;
}