Files @ r28732:c64e085ed540
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Location: cpp/openttd-patchpack/source/src/bridge_map.h

Patric Stout
Remove: setting "no_http_content_downloads" (#12058)

As we now use HTTPS, it is very likely this will work on most systems.
For systems that do have HTTPS blocked, it will fail instantly,
and it will fallback to TCP anyway. That makes this setting no longer
very useful.
/*
 * 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.h Map accessor functions for bridges. */

#ifndef BRIDGE_MAP_H
#define BRIDGE_MAP_H

#include "rail_map.h"
#include "road_map.h"
#include "bridge.h"
#include "water_map.h"

/**
 * Checks if this is a bridge, instead of a tunnel
 * @param t The tile to analyze
 * @pre IsTileType(t, MP_TUNNELBRIDGE)
 * @return true if the structure is a bridge one
 */
inline bool IsBridge(Tile t)
{
	assert(IsTileType(t, MP_TUNNELBRIDGE));
	return HasBit(t.m5(), 7);
}

/**
 * checks if there is a bridge on this tile
 * @param t The tile to analyze
 * @return true if a bridge is present
 */
inline bool IsBridgeTile(Tile t)
{
	return IsTileType(t, MP_TUNNELBRIDGE) && IsBridge(t);
}

/**
 * checks if a bridge is set above the ground of this tile
 * @param t The tile to analyze
 * @return true if a bridge is detected above
 */
inline bool IsBridgeAbove(Tile t)
{
	return GB(t.type(), 2, 2) != 0;
}

/**
 * Determines the type of bridge on a tile
 * @param t The tile to analyze
 * @pre IsBridgeTile(t)
 * @return The bridge type
 */
inline BridgeType GetBridgeType(Tile t)
{
	assert(IsBridgeTile(t));
	return GB(t.m6(), 2, 4);
}

/**
 * Get the axis of the bridge that goes over the tile. Not the axis or the ramp.
 * @param t The tile to analyze
 * @pre IsBridgeAbove(t)
 * @return the above mentioned axis
 */
inline Axis GetBridgeAxis(Tile t)
{
	assert(IsBridgeAbove(t));
	return (Axis)(GB(t.type(), 2, 2) - 1);
}

TileIndex GetNorthernBridgeEnd(TileIndex t);
TileIndex GetSouthernBridgeEnd(TileIndex t);
TileIndex GetOtherBridgeEnd(TileIndex t);

int GetBridgeHeight(TileIndex 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
 */
inline int GetBridgePixelHeight(TileIndex tile)
{
	return GetBridgeHeight(tile) * TILE_HEIGHT;
}

/**
 * Remove the bridge over the given axis.
 * @param t the tile to remove the bridge from
 * @param a the axis of the bridge to remove
 */
inline void ClearSingleBridgeMiddle(Tile t, Axis a)
{
	ClrBit(t.type(), 2 + a);
}

/**
 * Removes bridges from the given, that is bridges along the X and Y axis.
 * @param t the tile to remove the bridge from
 */
inline void ClearBridgeMiddle(Tile t)
{
	ClearSingleBridgeMiddle(t, AXIS_X);
	ClearSingleBridgeMiddle(t, AXIS_Y);
}

/**
 * Set that there is a bridge over the given axis.
 * @param t the tile to add the bridge to
 * @param a the axis of the bridge to add
 */
inline void SetBridgeMiddle(Tile t, Axis a)
{
	SetBit(t.type(), 2 + a);
}

/**
 * Generic part to make a bridge ramp for both roads and rails.
 * @param t          the tile to make a bridge ramp
 * @param o          the new owner of the bridge ramp
 * @param bridgetype the type of bridge this bridge ramp belongs to
 * @param d          the direction this ramp must be facing
 * @param tt         the transport type of the bridge
 * @note this function should not be called directly.
 */
inline void MakeBridgeRamp(Tile t, Owner o, BridgeType bridgetype, DiagDirection d, TransportType tt)
{
	SetTileType(t, MP_TUNNELBRIDGE);
	SetTileOwner(t, o);
	SetDockingTile(t, false);
	t.m2() = 0;
	t.m3() = 0;
	t.m4() = INVALID_ROADTYPE;
	t.m5() = 1 << 7 | tt << 2 | d;
	SB(t.m6(), 2, 4, bridgetype);
	t.m7() = 0;
	t.m8() = INVALID_ROADTYPE << 6;
}

/**
 * Make a bridge ramp for roads.
 * @param t          the tile to make a bridge ramp
 * @param o          the new owner of the bridge ramp
 * @param owner_road the new owner of the road on the bridge
 * @param owner_tram the new owner of the tram on the bridge
 * @param bridgetype the type of bridge this bridge ramp belongs to
 * @param d          the direction this ramp must be facing
 * @param road_rt    the road type of the bridge
 * @param tram_rt    the tram type of the bridge
 */
inline void MakeRoadBridgeRamp(Tile t, Owner o, Owner owner_road, Owner owner_tram, BridgeType bridgetype, DiagDirection d, RoadType road_rt, RoadType tram_rt)
{
	MakeBridgeRamp(t, o, bridgetype, d, TRANSPORT_ROAD);
	SetRoadOwner(t, RTT_ROAD, owner_road);
	if (owner_tram != OWNER_TOWN) SetRoadOwner(t, RTT_TRAM, owner_tram);
	SetRoadTypes(t, road_rt, tram_rt);
}

/**
 * Make a bridge ramp for rails.
 * @param t          the tile to make a bridge ramp
 * @param o          the new owner of the bridge ramp
 * @param bridgetype the type of bridge this bridge ramp belongs to
 * @param d          the direction this ramp must be facing
 * @param rt         the rail type of the bridge
 */
inline void MakeRailBridgeRamp(Tile t, Owner o, BridgeType bridgetype, DiagDirection d, RailType rt)
{
	MakeBridgeRamp(t, o, bridgetype, d, TRANSPORT_RAIL);
	SetRailType(t, rt);
}

/**
 * Make a bridge ramp for aqueducts.
 * @param t          the tile to make a bridge ramp
 * @param o          the new owner of the bridge ramp
 * @param d          the direction this ramp must be facing
 */
inline void MakeAqueductBridgeRamp(Tile t, Owner o, DiagDirection d)
{
	MakeBridgeRamp(t, o, 0, d, TRANSPORT_WATER);
}

#endif /* BRIDGE_MAP_H */