tron@3214: /* $Id$ */
tron@3214: 
tron@3214: #include "stdafx.h"
tron@3214: #include "openttd.h"
tron@3214: #include "bridge_map.h"
celestar@5573: #include "variables.h"
tron@3214: 
tron@3214: 
tron@3225: TileIndex GetBridgeEnd(TileIndex tile, DiagDirection dir)
tron@3225: {
Darkvater@4559: 	TileIndexDiff delta = TileOffsByDiagDir(dir);
tron@3225: 
celestar@5573: 	dir = ReverseDiagDir(dir);
tron@3977: 	do {
tron@3977: 		tile += delta;
celestar@5591: 	} while (!IsBridgeTile(tile) || GetBridgeRampDirection(tile) != dir);
tron@3225: 
tron@3225: 	return tile;
tron@3225: }
tron@3225: 
tron@3225: 
celestar@5573: TileIndex GetNorthernBridgeEnd(TileIndex t)
celestar@5573: {
celestar@5573: 	return GetBridgeEnd(t, ReverseDiagDir(AxisToDiagDir(GetBridgeAxis(t))));
celestar@5573: }
celestar@5573: 
celestar@5573: 
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@5573: 	assert(IsBridgeTile(tile));
celestar@5573: 	return GetBridgeEnd(tile, GetBridgeRampDirection(tile));
celestar@5573: }
celestar@3933: 
celestar@5573: uint GetBridgeHeight(TileIndex t)
celestar@5573: {
celestar@5573: 	uint h;
celestar@5573: 	uint tileh = GetTileSlope(t, &h);
celestar@5573: 	uint f = GetBridgeFoundation(tileh, DiagDirToAxis(GetBridgeRampDirection(t)));
celestar@3933: 
celestar@5573: 	// one height level extra if the ramp is on a flat foundation
celestar@5573: 	return
celestar@5573: 		h + TILE_HEIGHT +
celestar@5573: 		(IS_INT_INSIDE(f, 1, 15) ? TILE_HEIGHT : 0) +
celestar@5573: 		(IsSteepSlope(tileh) ? TILE_HEIGHT : 0);
tron@3214: }