mirror of
https://github.com/JGRennison/OpenTTD-patches.git
synced 2024-11-17 21:25:40 +00:00
79 lines
2.3 KiB
C++
79 lines
2.3 KiB
C++
/* $Id$ */
|
|
|
|
/*
|
|
* This file is part of OpenTTD.
|
|
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
|
|
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/** @file bridge_map.cpp Map accessor functions for bridges. */
|
|
|
|
#include "stdafx.h"
|
|
#include "landscape.h"
|
|
#include "tunnelbridge_map.h"
|
|
|
|
|
|
/**
|
|
* Finds the end of a bridge in the specified direction starting at a middle tile
|
|
* @param tile the bridge tile to find the bridge ramp for
|
|
* @param dir the direction to search in
|
|
*/
|
|
static TileIndex GetBridgeEnd(TileIndex tile, DiagDirection dir)
|
|
{
|
|
TileIndexDiff delta = TileOffsByDiagDir(dir);
|
|
|
|
dir = ReverseDiagDir(dir);
|
|
do {
|
|
tile += delta;
|
|
} while (!IsBridgeTile(tile) || GetTunnelBridgeDirection(tile) != dir);
|
|
|
|
return tile;
|
|
}
|
|
|
|
|
|
/**
|
|
* Finds the northern end of a bridge starting at a middle tile
|
|
* @param t the bridge tile to find the bridge ramp for
|
|
*/
|
|
TileIndex GetNorthernBridgeEnd(TileIndex t)
|
|
{
|
|
return GetBridgeEnd(t, ReverseDiagDir(AxisToDiagDir(GetBridgeAxis(t))));
|
|
}
|
|
|
|
|
|
/**
|
|
* Finds the southern end of a bridge starting at a middle tile
|
|
* @param t the bridge tile to find the bridge ramp for
|
|
*/
|
|
TileIndex GetSouthernBridgeEnd(TileIndex t)
|
|
{
|
|
return GetBridgeEnd(t, AxisToDiagDir(GetBridgeAxis(t)));
|
|
}
|
|
|
|
|
|
/**
|
|
* Starting at one bridge end finds the other bridge end
|
|
* @param t the bridge ramp tile to find the other bridge ramp for
|
|
*/
|
|
TileIndex GetOtherBridgeEnd(TileIndex tile)
|
|
{
|
|
assert(IsBridgeTile(tile));
|
|
return GetBridgeEnd(tile, GetTunnelBridgeDirection(tile));
|
|
}
|
|
|
|
/**
|
|
* Get the height ('z') of a bridge in pixels.
|
|
* @param tile the bridge ramp tile to get the bridge height from
|
|
* @return the height of the bridge in pixels
|
|
*/
|
|
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);
|
|
}
|