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(svn r4747) - Newstations: implement support for variables 40, 41, 46, 47 and 49.

This commit is contained in:
peter1138 2006-05-06 09:31:06 +00:00
parent 1512d86e35
commit 0197d7d683
1 changed files with 103 additions and 1 deletions
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104
newgrf_station.c
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@ -162,6 +162,102 @@ const StationSpec *GetCustomStationSpec(StationClassID sclass, uint station)
}
/* Evaluate a tile's position within a station, and return the result a bitstuffed format.
* if not centred: .TNLcCpP, if centred: .TNL..CP
* T = Tile layout number (GetStationGfx), N = Number of platforms, L = Length of platforms
* C = Current platform number from start, c = from end
* P = Position along platform from start, p = from end
* if centred, C/P start from the centre and c/p are not available.
*/
uint32 GetPlatformInfo(Axis axis, byte tile, int platforms, int length, int x, int y, bool centred)
{
uint32 retval = 0;
if (axis == AXIS_X) {
intswap(platforms, length);
intswap(x, y);
}
/* Limit our sizes to 4 bits */
platforms = min(15, platforms);
length = min(15, length);
x = min(15, x);
y = min(15, y);
if (centred) {
x -= platforms / 2;
y -= length / 2;
SB(retval, 0, 4, clamp(y, -8, 7));
SB(retval, 4, 4, clamp(x, -8, 7));
} else {
SB(retval, 0, 4, y);
SB(retval, 4, 4, length - y - 1);
SB(retval, 8, 4, x);
SB(retval, 12, 4, platforms - x - 1);
}
SB(retval, 16, 4, length);
SB(retval, 20, 4, platforms);
SB(retval, 24, 4, tile);
return retval;
}
/* Find the end of a railway station, from the tile, in the direction of delta.
* If check_type is set, we stop if the custom station type changes.
* If check_axis is set, we stop if the station direction changes.
*/
static TileIndex FindRailStationEnd(TileIndex tile, TileIndexDiff delta, bool check_type, bool check_axis)
{
bool waypoint;
byte orig_type = 0;
Axis orig_axis = AXIS_X;
waypoint = IsTileType(tile, MP_RAILWAY);
if (waypoint) {
if (check_axis) orig_axis = GetWaypointAxis(tile);
} else {
if (check_type) orig_type = GetCustomStationSpecIndex(tile);
if (check_axis) orig_axis = GetRailStationAxis(tile);
}
while (true) {
TileIndex new_tile = TILE_ADD(tile, delta);
if (waypoint) {
if (!IsTileType(new_tile, MP_RAILWAY)) break;
if (GetRailTileType(new_tile) != RAIL_TYPE_DEPOT_WAYPOINT) break;
if (GetRailTileSubtype(new_tile) != RAIL_SUBTYPE_WAYPOINT) break;
if (check_axis && GetWaypointAxis(new_tile) != orig_axis) break;
} else {
if (!IsRailwayStationTile(new_tile)) break;
if (check_type && GetCustomStationSpecIndex(new_tile) != orig_type) break;
if (check_axis && GetRailStationAxis(new_tile) != orig_axis) break;
}
tile = new_tile;
}
return tile;
}
static uint32 GetPlatformInfoHelper(TileIndex tile, bool check_type, bool check_axis, bool centred)
{
int tx = TileX(tile);
int ty = TileY(tile);
int sx = TileX(FindRailStationEnd(tile, TileDiffXY(-1, 0), check_type, check_axis));
int sy = TileY(FindRailStationEnd(tile, TileDiffXY( 0, -1), check_type, check_axis));
int ex = TileX(FindRailStationEnd(tile, TileDiffXY( 1, 0), check_type, check_axis)) + 1;
int ey = TileY(FindRailStationEnd(tile, TileDiffXY( 0, 1), check_type, check_axis)) + 1;
Axis axis = IsTileType(tile, MP_RAILWAY) ? GetWaypointAxis(tile) : GetRailStationAxis(tile);
tx -= sx; ex -= sx;
ty -= sy; ey -= sy;
return GetPlatformInfo(axis, IsTileType(tile, MP_RAILWAY) ? 2 : GetStationGfx(tile), ex, ey, tx, ty, centred);
}
/* Station Resolver Functions */
static uint32 StationGetRandomBits(const ResolverObject *object)
{
@ -189,6 +285,7 @@ static void StationSetTriggers(const ResolverObject *object, int triggers)
static uint32 StationGetVariable(const ResolverObject *object, byte variable, byte parameter)
{
const Station *st = object->u.station.st;
TileIndex tile = object->u.station.tile;
if (st == NULL) {
/* Station does not exist, so we're in a purchase list */
@ -208,9 +305,13 @@ static uint32 StationGetVariable(const ResolverObject *object, byte variable, by
switch (variable) {
/* Calculated station variables */
case 0x42: return GetRailType(object->u.station.tile) << 8; /* Rail type */
case 0x40: return GetPlatformInfoHelper(tile, false, false, false);
case 0x41: return GetPlatformInfoHelper(tile, true, false, false);
case 0x42: return GetRailType(tile) << 8; /* Rail type */
case 0x43: return st->owner; /* Station owner */
case 0x44: return 2; /* PBS status */
case 0x46: return GetPlatformInfoHelper(tile, false, false, true);
case 0x47: return GetPlatformInfoHelper(tile, true, false, true);
case 0x48: { /* Accepted cargo types */
CargoID cargo_type;
uint32 value = 0;
@ -220,6 +321,7 @@ static uint32 StationGetVariable(const ResolverObject *object, byte variable, by
}
return value;
}
case 0x49: return GetPlatformInfoHelper(tile, false, true, false);
/* Variables which use the parameter */
case 0x60: return GB(st->goods[parameter].waiting_acceptance, 0, 12);