cpp/openttd-patchpack/source Files · tunnel_map.c

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Location: cpp/openttd-patchpack/source/tunnel_map.c

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miham

(svn r7375) WebTranslator2 update to 2006-12-05 18:07:02
american - 22 fixed, 2 changed by WhiteRabbit (24)
brazilian_portuguese - 23 fixed by tucalipe (23)
bulgarian - 22 fixed, 2 changed by groupsky (24)
catalan - 23 fixed, 31 changed by arnaullv (54)
croatian - 203 fixed, 2 deleted, 27 changed by knovak (232)
danish - 9 fixed, 26 changed by ThomasA (35)
french - 23 fixed, 10 changed by glx (33)
hungarian - 23 fixed, 1 changed by miham (24)
italian - 23 fixed by sidew (23)
slovak - 8 fixed by lengyel (8)

/* $Id$ */

#include "stdafx.h"
#include "openttd.h"
#include "tile.h"
#include "tunnel_map.h"

TileIndex GetOtherTunnelEnd(TileIndex tile)
{
	DiagDirection dir = GetTunnelDirection(tile);
	TileIndexDiff delta = TileOffsByDiagDir(dir);
	uint z = GetTileZ(tile);

	dir = ReverseDiagDir(dir);
	do {
		tile += delta;
	} while (
		!IsTunnelTile(tile) ||
		GetTunnelDirection(tile) != dir ||
		GetTileZ(tile) != z
	);

	return tile;
}


static bool IsTunnelInWayDir(TileIndex tile, uint z, DiagDirection dir)
{
	TileIndexDiff delta = TileOffsByDiagDir(dir);
	uint height;

	do {
		tile -= delta;
		height = GetTileZ(tile);
	} while (z < height);

	return
		z == height &&
		IsTunnelTile(tile) &&
		GetTunnelDirection(tile) == dir;
}

bool IsTunnelInWay(TileIndex tile, uint z)
{
	return
		IsTunnelInWayDir(tile, z, DIAGDIR_NE) ||
		IsTunnelInWayDir(tile, z, DIAGDIR_SE) ||
		IsTunnelInWayDir(tile, z, DIAGDIR_SW) ||
		IsTunnelInWayDir(tile, z, DIAGDIR_NW);
}