tron@3214: /* $Id$ */
tron@3214: 
rubidium@6418: /** @file bridge_map.cpp Map accessor functions for bridges. */
belugas@6123: 
tron@3214: #include "stdafx.h"
tron@3214: #include "openttd.h"
tron@3214: #include "bridge_map.h"
rubidium@6418: #include "bridge.h"
celestar@5385: #include "variables.h"
rubidium@7764: #include "landscape.h"
tron@3214: 
tron@3214: 
tron@3225: TileIndex GetBridgeEnd(TileIndex tile, DiagDirection dir)
tron@3225: {
Darkvater@4559: 	TileIndexDiff delta = TileOffsByDiagDir(dir);
tron@3225: 
celestar@5385: 	dir = ReverseDiagDir(dir);
tron@3977: 	do {
tron@3977: 		tile += delta;
celestar@5385: 	} while (!IsBridgeTile(tile) || GetBridgeRampDirection(tile) != dir);
tron@3225: 
tron@3225: 	return tile;
tron@3225: }
tron@3225: 
tron@3225: 
celestar@5385: TileIndex GetNorthernBridgeEnd(TileIndex t)
celestar@5385: {
celestar@5385: 	return GetBridgeEnd(t, ReverseDiagDir(AxisToDiagDir(GetBridgeAxis(t))));
celestar@5385: }
celestar@5385: 
celestar@5385: 
tron@3225: TileIndex GetSouthernBridgeEnd(TileIndex t)
tron@3225: {
tron@3225: 	return GetBridgeEnd(t, AxisToDiagDir(GetBridgeAxis(t)));
tron@3225: }
tron@3225: 
tron@3225: 
tron@3214: TileIndex GetOtherBridgeEnd(TileIndex tile)
tron@3214: {
celestar@5385: 	assert(IsBridgeTile(tile));
celestar@5385: 	return GetBridgeEnd(tile, GetBridgeRampDirection(tile));
celestar@5385: }
celestar@3933: 
celestar@5385: uint GetBridgeHeight(TileIndex t)
celestar@5385: {
celestar@5385: 	uint h;
rubidium@5587: 	Slope tileh = GetTileSlope(t, &h);
rubidium@7336: 	Foundation f = GetBridgeFoundation(tileh, DiagDirToAxis(GetBridgeRampDirection(t)));
celestar@3933: 
rubidium@7764: 	/* one height level extra for the ramp */
rubidium@7764: 	return h + TILE_HEIGHT + ApplyFoundationToSlope(f, &tileh);
tron@3214: }