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

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

r7882:cdf03a4ac84a 1.9 KiB text/x-c Show Annotation Show as Raw Download as Raw

rubidium

(svn r11433) -Fix: starting OpenTTD with DOS files made it look weird out of the box.
-Change: make extra sprites (the ones not in the TTD GRFs) replaceable using Action 5.
-Feature: make replacing contiguous subsets of sprites in for some types possible in Action 5.
Note to GRF authors: when you replaced OpenTTD sprites that are not from the TTD GRF files using Action A, your GRF will not have the intended result anymore as the sprite numbers have changed. You should replace the Action A with an Action 5 from now on.

#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;
}