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(svn r3777) Add some functions to handle tunnels

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tron
2006-03-06 20:55:24 +00:00
parent 2d3c28f2b3
commit f2dc736554
11 changed files with 132 additions and 46 deletions
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11
rail_cmd.c
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@@ -10,6 +10,7 @@
#include "table/strings.h"
#include "map.h"
#include "tile.h"
#include "tunnel_map.h"
#include "vehicle.h"
#include "viewport.h"
#include "command.h"
@@ -1627,21 +1628,21 @@ static bool SignalVehicleCheck(TileIndex tile, uint track)
if (IsTileType(tile, MP_TUNNELBRIDGE) && GB(_m[tile].m5, 4, 4) == 0) {
// It is a tunnel we're checking, we need to do some special stuff
// because VehicleFromPos will not find the vihicle otherwise
byte direction = GB(_m[tile].m5, 0, 2);
FindLengthOfTunnelResult flotr;
flotr = FindLengthOfTunnel(tile, direction);
TileIndex end = GetOtherTunnelEnd(tile);
DiagDirection direction = GetTunnelDirection(tile);
dest.track = 1 << (direction & 1); // get the trackbit the vehicle would have if it has not entered the tunnel yet (ie is still visible)
// check for a vehicle with that trackdir on the start tile of the tunnel
if (VehicleFromPos(tile, &dest, SignalVehicleCheckProc) != NULL) return true;
// check for a vehicle with that trackdir on the end tile of the tunnel
if (VehicleFromPos(flotr.tile, &dest, SignalVehicleCheckProc) != NULL) return true;
if (VehicleFromPos(end, &dest, SignalVehicleCheckProc) != NULL) return true;
// now check all tiles from start to end for a "hidden" vehicle
// NOTE: the hashes for tiles may overlap, so this could maybe be optimised a bit by not checking every tile?
dest.track = 0x40; // trackbit for vehicles "hidden" inside a tunnel
for (; tile != flotr.tile; tile += TileOffsByDir(direction)) {
for (; tile != end; tile += TileOffsByDir(direction)) {
if (VehicleFromPos(tile, &dest, SignalVehicleCheckProc) != NULL)
return true;
}