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

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

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glx

(svn r13390) -Codechange: introduce usererror() for fatal but not openttd related errors. Now all error() will 'crash' openttd after showing the message in win32 releases (MSVC), creating a crash.log and crash.dmp (like the '!' hack used before). On the other hand, usererror() will just close the game. So use error() only when it can be helpful to debugging, else use usererror().

/* $Id$ */

/** @file bridge_map.cpp Map accessor functions for bridges. */

#include "stdafx.h"
#include "openttd.h"
#include "bridge_map.h"
#include "bridge.h"
#include "variables.h"
#include "landscape.h"
#include "tunnelbridge_map.h"


TileIndex GetBridgeEnd(TileIndex tile, DiagDirection dir)
{
	TileIndexDiff delta = TileOffsByDiagDir(dir);

	dir = ReverseDiagDir(dir);
	do {
		tile += delta;
	} while (!IsBridgeTile(tile) || GetTunnelBridgeDirection(tile) != dir);

	return tile;
}


TileIndex GetNorthernBridgeEnd(TileIndex t)
{
	return GetBridgeEnd(t, ReverseDiagDir(AxisToDiagDir(GetBridgeAxis(t))));
}


TileIndex GetSouthernBridgeEnd(TileIndex t)
{
	return GetBridgeEnd(t, AxisToDiagDir(GetBridgeAxis(t)));
}


TileIndex GetOtherBridgeEnd(TileIndex tile)
{
	assert(IsBridgeTile(tile));
	return GetBridgeEnd(tile, GetTunnelBridgeDirection(tile));
}

uint GetBridgeHeight(TileIndex t)
{
	uint h;
	Slope tileh = GetTileSlope(t, &h);
	Foundation f = GetBridgeFoundation(tileh, DiagDirToAxis(GetTunnelBridgeDirection(t)));

	/* one height level extra for the ramp */
	return h + TILE_HEIGHT + ApplyFoundationToSlope(f, &tileh);
}