src/bridge_map.cpp
author rubidium
Sat, 20 Oct 2007 16:50:48 +0000
changeset 7764 e594296e90f6
parent 7336 180fe387acfc
child 8083 ad22eade501f
permissions -rw-r--r--
(svn r11313) -Codechange: prepare several pieces of code so the can handle some new slopes. Patch by frosch.
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/* $Id$ */
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/** @file bridge_map.cpp Map accessor functions for bridges. */
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#include "stdafx.h"
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#include "openttd.h"
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#include "bridge_map.h"
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#include "bridge.h"
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#include "variables.h"
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#include "landscape.h"
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TileIndex GetBridgeEnd(TileIndex tile, DiagDirection dir)
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{
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	TileIndexDiff delta = TileOffsByDiagDir(dir);
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	dir = ReverseDiagDir(dir);
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	do {
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		tile += delta;
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	} while (!IsBridgeTile(tile) || GetBridgeRampDirection(tile) != dir);
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	return tile;
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}
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TileIndex GetNorthernBridgeEnd(TileIndex t)
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{
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	return GetBridgeEnd(t, ReverseDiagDir(AxisToDiagDir(GetBridgeAxis(t))));
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}
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TileIndex GetSouthernBridgeEnd(TileIndex t)
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{
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	return GetBridgeEnd(t, AxisToDiagDir(GetBridgeAxis(t)));
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}
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TileIndex GetOtherBridgeEnd(TileIndex tile)
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{
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	assert(IsBridgeTile(tile));
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	return GetBridgeEnd(tile, GetBridgeRampDirection(tile));
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}
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uint GetBridgeHeight(TileIndex t)
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{
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	uint h;
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	Slope tileh = GetTileSlope(t, &h);
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	Foundation f = GetBridgeFoundation(tileh, DiagDirToAxis(GetBridgeRampDirection(t)));
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	/* one height level extra for the ramp */
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	return h + TILE_HEIGHT + ApplyFoundationToSlope(f, &tileh);
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}