(svn r2448) General cleanup of rail related code, more to follow.
* Add: rail.[ch] for rail-related enums and wrapper functions.
* Codechange: Removed dozens of magic numbers with below enums.
* Codechange: Rewrote CheckTrackCombination().
* Add: TILE_SIZE, TILE_PIXELS and TILE_HEIGHT constants.
* Add: enums RailTileType, RailTileSubtype, SignalType to mask against the map arrays.
* Add: enums Track, TrackBits, Trackdir, TrackdirBits for railway track data. (Note that the old RAIL_BIT constants are replaced by TRACK_BIT ones).
* Add: enums Direction and DiagDirection
* Codechange: Moved a bunch of track(dir) related lookup arrays from npf.[ch] to rail.[ch].
* Codechange: move RailType enum from tile.h to rail.h.
* Add: Wrapper functions for masking signal status in the map arrays: SignalAlongTrackdir, SignalAgainstTrackdir and SignalOnTrack.
* Add: Wrapper functions to access rail tiles, using above enums
* Add: Wrapper functions to modify tracks, trackdirs, directions, etc.
* Add: Wrapper functions for all lookup arrays in rail.[ch] (Arrays are still used in parts of the code)
* Codechange: Renamed some variables and arguments to better represent what they contain (railbit -> track, bits -> trackdirbits, etc.).
* Codechange: Don't use FindLandscapeHeight() in CmdRemoveSingleRail(), since it returns way too much info. Use GetTileSlope() instead.
* Codechange: [NPF] Removed some unused globals and code from npf.c.
#include "stdafx.h"
#include "openttd.h"
#include "table/strings.h"
#include "viewport.h"
#include "command.h"
static void DrawTile_Dummy(TileInfo *ti)
{
DrawGroundSpriteAt(0x3EC, ti->x, ti->y, ti->z);
}
static uint GetSlopeZ_Dummy(TileInfo *ti) {
return GetPartialZ(ti->x&0xF, ti->y&0xF, ti->tileh) + ti->z;
}
static uint GetSlopeTileh_Dummy(TileInfo *ti) {
return ti->tileh;
}
static int32 ClearTile_Dummy(uint tile, byte flags) {
return_cmd_error(STR_0001_OFF_EDGE_OF_MAP);
}
static void GetAcceptedCargo_Dummy(uint tile, AcceptedCargo ac)
{
/* not used */
}
static void GetTileDesc_Dummy(uint tile, TileDesc *td)
{
td->str = STR_EMPTY;
td->owner = OWNER_NONE;
}
static void AnimateTile_Dummy(uint tile)
{
/* not used */
}
static void TileLoop_Dummy(uint tile)
{
/* not used */
}
static void ClickTile_Dummy(uint tile)
{
/* not used */
}
static void ChangeTileOwner_Dummy(uint tile, byte old_player, byte new_player)
{
/* not used */
}
static uint32 GetTileTrackStatus_Dummy(uint tile, TransportType mode)
{
return 0;
}
const TileTypeProcs _tile_type_dummy_procs = {
DrawTile_Dummy, /* draw_tile_proc */
GetSlopeZ_Dummy, /* get_slope_z_proc */
ClearTile_Dummy, /* clear_tile_proc */
GetAcceptedCargo_Dummy, /* get_accepted_cargo_proc */
GetTileDesc_Dummy, /* get_tile_desc_proc */
GetTileTrackStatus_Dummy, /* get_tile_track_status_proc */
ClickTile_Dummy, /* click_tile_proc */
AnimateTile_Dummy, /* animate_tile_proc */
TileLoop_Dummy, /* tile_loop_clear */
ChangeTileOwner_Dummy, /* change_tile_owner_clear */
NULL, /* get_produced_cargo_proc */
NULL, /* vehicle_enter_tile_proc */
NULL, /* vehicle_leave_tile_proc */
GetSlopeTileh_Dummy, /* get_slope_tileh_proc */
};