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authorbelugas <belugas@openttd.org>2008-06-21 23:59:38 +0000
committerbelugas <belugas@openttd.org>2008-06-21 23:59:38 +0000
commit31b002dab0cb1bcbc00c9982a72e2cd948f74de5 (patch)
treec87f81288242ce58976f8b4f27bc13d69dc64681 /src
parent37b8e87454998049f8256bc76a9971202c828608 (diff)
downloadopenttd-31b002dab0cb1bcbc00c9982a72e2cd948f74de5.tar.xz
(svn r13603) -Feature{newGRF]: Add var 65 in Variational Action 2 Variables for Houses.
This var will return the manhattan distance of the nearest house that match a given criteria. The criterias can be: 0 : house ID/ 1 : Class ID/ 2 : grf ID The search radius can be defined too, up to 64.
Diffstat (limited to 'src')
-rw-r--r--src/newgrf_house.cpp88
1 files changed, 88 insertions, 0 deletions
diff --git a/src/newgrf_house.cpp b/src/newgrf_house.cpp
index 78e9ffdde..8fa10ba1a 100644
--- a/src/newgrf_house.cpp
+++ b/src/newgrf_house.cpp
@@ -201,6 +201,88 @@ uint32 GetNearbyTileInformation(byte parameter, TileIndex tile)
return GetNearbyTileInformation(tile);
}
+/** Callback function to search a house by its HouseID
+ * @param tile TileIndex to be examined
+ * @param data house id, in order to get the specs
+ * @return true or false, if found or not
+ */
+static bool SearchNearbyHouseID(TileIndex tile, uint32 data)
+{
+ if (IsTileType(tile, MP_HOUSE)) {
+ const HouseSpec *hs = GetHouseSpecs(GetHouseType(tile)); // tile been examined
+ if (hs->grffile != NULL) { // must be one from a grf file
+ const HouseSpec *test_hs = GetHouseSpecs((HouseID)GB(data, 0, 16));
+ return hs->local_id == test_hs->local_id && // same local id as the one requested
+ hs->grffile->grfid == test_hs->grffile->grfid; // from the same grf
+ }
+ }
+ return false;
+}
+
+/** Callback function to search a house by its classID
+ * @param tile TileIndex to be examined
+ * @param data house id, in order to get the specs
+ * @return true or false, if found or not
+ */
+static bool SearchNearbyHouseClass(TileIndex tile, uint32 data)
+{
+ if (IsTileType(tile, MP_HOUSE)) {
+ const HouseSpec *hs = GetHouseSpecs(GetHouseType(tile)); // tile been examined
+ if (hs->grffile != NULL) { // must be one from a grf file
+ const HouseSpec *test_hs = GetHouseSpecs((HouseID)GB(data, 0, 16));
+ return hs->class_id == test_hs->class_id && // same classid as the one requested
+ hs->grffile->grfid == test_hs->grffile->grfid; // from the same grf
+ }
+ }
+ return false;
+}
+
+/** Callback function to search a house by its grfID
+ * @param tile TileIndex to be examined
+ * @param data house id, in order to get the specs
+ * @return true or false, if found or not
+ */
+static bool SearchNearbyHouseGRFID(TileIndex tile, uint32 data)
+{
+ if (IsTileType(tile, MP_HOUSE)) {
+ const HouseSpec *hs = GetHouseSpecs(GetHouseType(tile)); // tile been examined
+ if (hs->grffile != NULL) { // must be one from a grf file
+ const HouseSpec *test_hs = GetHouseSpecs((HouseID)GB(data, 0, 16));
+ return hs->grffile->grfid == test_hs->grffile->grfid; // from the same grf
+ }
+ }
+ return false;
+}
+
+/** This function will activate a search around a central tile, looking for some houses
+ * that fit the requested characteristics
+ * @param parameter that is given by the callback.
+ * bits 0..6 radius of the search
+ * bits 7..8 search type i.e.: 0 = houseID/ 1 = classID/ 2 = grfID
+ * @param tile TileIndex from which to start the search
+ * @param data the HouseID that is associated to the house work who started the callback
+ * @result the Manhattan distance from the center tile, if any, and 0 if failure
+ */
+static uint32 GetDistanceFromNearbyHouse(uint8 parameter, TileIndex tile, uint32 data)
+{
+ static TestTileOnSearchProc * const search_procs[3] = {
+ SearchNearbyHouseID,
+ SearchNearbyHouseClass,
+ SearchNearbyHouseGRFID,
+ };
+ TileIndex found_tile = tile;
+ uint8 searchtype = GB(parameter, 6, 2);
+ uint8 searchradius = GB(parameter, 0, 6);
+ if (searchtype >= lengthof(search_procs)) return 0; // do not run on ill-defined code
+ if (searchradius < 2) return 0; // do not use a too low radius
+
+ /* Use a pointer for the tile to start the search. Will be required for calculating the distance*/
+ if (CircularTileSearch(&found_tile, searchradius, search_procs[searchtype], data)) {
+ return DistanceManhattan(found_tile, tile);
+ }
+ return 0;
+}
+
/**
* HouseGetVariable():
*
@@ -260,6 +342,12 @@ static uint32 HouseGetVariable(const ResolverObject *object, byte variable, byte
return IsTileType(testtile, MP_HOUSE) ? GetHouseAnimationFrame(testtile) : 0;
}
+ /* Cargo acceptance history of nearby stations */
+ /*case 0x64: not implemented yet */
+
+ /* Distance test for some house types */
+ case 0x65: return GetDistanceFromNearbyHouse(parameter, tile, object->u.house.house_id);
+
/* Read GRF parameter */
case 0x7F: return GetGRFParameter(object->u.house.house_id, parameter);
}