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 r6461) WebTranslator2 update to 2006-09-16 14:47:23
catalan - 21 fixed, 46 changed by arnaullv (67)
french - 20 fixed by glx (20)
german - 13 fixed, 2 changed by Neonox (15)
hungarian - 20 fixed by miham (20)
polish - 20 fixed by meush (20)
portuguese - 2 fixed by izhirahider (2)
slovak - 6 fixed, 8 changed by lengyel (14)
turkish - 20 fixed by jnmbk (20)

/* $Id$ */

#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);
}