tunnel_map.c
author miham
Mon, 04 Dec 2006 04:22:53 +0000
changeset 5226 4e131f956e9d
parent 4559 aa0c13e39840
permissions -rw-r--r--
(svn r7346) WebTranslator2 update to 2006-12-04 05:22:02
american - 5 fixed by WhiteRabbit (5)
brazilian_portuguese - 1 fixed by tucalipe (1)
bulgarian - 5 fixed by groupsky (5)
catalan - 1 fixed, 3 changed by arnaullv (4)
croatian - 186 fixed, 111 changed by knovak (297)
czech - 5 fixed by Hadez (5)
dutch - 5 fixed by habell (5)
french - 1 fixed by glx (1)
german - 5 fixed by Neonox (5)
italian - 5 fixed by sidew (5)
portuguese - 4 fixed by izhirahider (4)
turkish - 5 fixed by jnmbk (5)
/* $Id$ */

#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);
}