1 /* $Id$ */

     2 

     3 #include "stdafx.h"

     4 #include "openttd.h"

     5 #include "bridge_map.h"

     6 #include "variables.h"

     7 

     8 

     9 TileIndex GetBridgeEnd(TileIndex tile, DiagDirection dir)

    10 {

    11 	TileIndexDiff delta = TileOffsByDiagDir(dir);

    12 

    13 	dir = ReverseDiagDir(dir);

    14 	do {

    15 		tile += delta;

    16 	} while (!IsBridgeTile(tile) || GetBridgeRampDirection(tile) != dir);

    17 

    18 	return tile;

    19 }

    20 

    21 

    22 TileIndex GetNorthernBridgeEnd(TileIndex t)

    23 {

    24 	return GetBridgeEnd(t, ReverseDiagDir(AxisToDiagDir(GetBridgeAxis(t))));

    25 }

    26 

    27 

    28 TileIndex GetSouthernBridgeEnd(TileIndex t)

    29 {

    30 	return GetBridgeEnd(t, AxisToDiagDir(GetBridgeAxis(t)));

    31 }

    32 

    33 

    34 TileIndex GetOtherBridgeEnd(TileIndex tile)

    35 {

    36 	assert(IsBridgeTile(tile));

    37 	return GetBridgeEnd(tile, GetBridgeRampDirection(tile));

    38 }

    39 

    40 uint GetBridgeHeight(TileIndex t)

    41 {

    42 	uint h;

    43 	uint tileh = GetTileSlope(t, &h);

    44 	uint f = GetBridgeFoundation(tileh, DiagDirToAxis(GetBridgeRampDirection(t)));

    45 

    46 	// one height level extra if the ramp is on a flat foundation

    47 	return

    48 		h + TILE_HEIGHT +

    49 		(IS_INT_INSIDE(f, 1, 15) ? TILE_HEIGHT : 0) +

    50 		(IsSteepSlope(tileh) ? TILE_HEIGHT : 0);

    51 }