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authorbelugas <belugas@openttd.org>2008-06-03 02:20:27 +0000
committerbelugas <belugas@openttd.org>2008-06-03 02:20:27 +0000
commitb0ada3fbbf25693675a18e3360657816ed5cf2ca (patch)
tree995aadb7b724c94354b6a56dab399357bd204c3c /src
parent00851610e1e64d8b5e759c425bfd4ddbf8f504ee (diff)
downloadopenttd-b0ada3fbbf25693675a18e3360657816ed5cf2ca.tar.xz
(svn r13367) -Codechange: Allow CircularTileSearch function to return the tile where search has been successful, or INVALID_TILE if it has not
Diffstat (limited to 'src')
-rw-r--r--src/industry_cmd.cpp2
-rw-r--r--src/map.cpp16
-rw-r--r--src/map_func.h2
-rw-r--r--src/town_cmd.cpp2
4 files changed, 14 insertions, 8 deletions
diff --git a/src/industry_cmd.cpp b/src/industry_cmd.cpp
index 0bf658cdc..ae2322fdf 100644
--- a/src/industry_cmd.cpp
+++ b/src/industry_cmd.cpp
@@ -995,7 +995,7 @@ static void ChopLumberMillTrees(Industry *i)
if (!IsIndustryCompleted(tile)) return; ///< Can't proceed if not completed
- if (CircularTileSearch(tile, 40, SearchLumberMillTrees, 0)) ///< 40x40 tiles to search
+ if (CircularTileSearch(&tile, 40, SearchLumberMillTrees, 0)) ///< 40x40 tiles to search
i->produced_cargo_waiting[0] = min(0xffff, i->produced_cargo_waiting[0] + 45); ///< Found a tree, add according value to waiting cargo
}
diff --git a/src/map.cpp b/src/map.cpp
index 82a25f34c..640864c0a 100644
--- a/src/map.cpp
+++ b/src/map.cpp
@@ -258,7 +258,7 @@ uint DistanceFromEdge(TileIndex tile)
* Although it really is a square search...
* Every tile will be tested by means of the callback function proc,
* which will determine if yes or no the given tile meets criteria of search.
- * @param tile to start the search from
+ * @param tile to start the search from. Upon completion, it will return the tile matching the search
* @param size: number of tiles per side of the desired search area
* @param proc: callback testing function pointer.
* @param data to be passed to the callback function. Depends on the implementation
@@ -266,7 +266,7 @@ uint DistanceFromEdge(TileIndex tile)
* @pre proc != NULL
* @pre size > 0
*/
-bool CircularTileSearch(TileIndex tile, uint size, TestTileOnSearchProc proc, uint32 data)
+bool CircularTileSearch(TileIndex *tile, uint size, TestTileOnSearchProc proc, uint32 data)
{
uint n, x, y;
DiagDirection dir;
@@ -274,14 +274,17 @@ bool CircularTileSearch(TileIndex tile, uint size, TestTileOnSearchProc proc, ui
assert(proc != NULL);
assert(size > 0);
- x = TileX(tile);
- y = TileY(tile);
+ x = TileX(*tile);
+ y = TileY(*tile);
if (size % 2 == 1) {
/* If the length of the side is uneven, the center has to be checked
* separately, as the pattern of uneven sides requires to go around the center */
n = 2;
- if (proc(TileXY(x, y), data)) return true;
+ if (proc(TileXY(x, y), data)) {
+ *tile = TileXY(x, y);
+ return true;
+ }
/* If tile test is not successful, get one tile down and left,
* ready for a test in first circle around center tile */
@@ -302,6 +305,7 @@ bool CircularTileSearch(TileIndex tile, uint size, TestTileOnSearchProc proc, ui
for (j = n; j != 0; j--) {
if (x <= MapMaxX() && y <= MapMaxY() && ///< Is the tile within the map?
proc(TileXY(x, y), data)) { ///< Is the callback successful?
+ *tile = TileXY(x, y);
return true; ///< then stop the search
}
@@ -314,5 +318,7 @@ bool CircularTileSearch(TileIndex tile, uint size, TestTileOnSearchProc proc, ui
x += _tileoffs_by_dir[DIR_W].x;
y += _tileoffs_by_dir[DIR_W].y;
}
+
+ *tile = INVALID_TILE;
return false;
}
diff --git a/src/map_func.h b/src/map_func.h
index b9933674e..a4b3991da 100644
--- a/src/map_func.h
+++ b/src/map_func.h
@@ -391,7 +391,7 @@ typedef bool TestTileOnSearchProc(TileIndex tile, uint32 data);
/**
* Searches for some cirumstances of a tile around a given tile with a helper function.
*/
-bool CircularTileSearch(TileIndex tile, uint size, TestTileOnSearchProc proc, uint32 data);
+bool CircularTileSearch(TileIndex *tile, uint size, TestTileOnSearchProc proc, uint32 data);
/**
* Get a random tile out of a given seed.
diff --git a/src/town_cmd.cpp b/src/town_cmd.cpp
index a140f62f8..2967e11da 100644
--- a/src/town_cmd.cpp
+++ b/src/town_cmd.cpp
@@ -2193,7 +2193,7 @@ static void TownActionBuildStatue(Town *t)
{
TileIndex tile = t->xy;
- if (CircularTileSearch(tile, 9, SearchTileForStatue, t->index)) {
+ if (CircularTileSearch(&tile, 9, SearchTileForStatue, t->index)) {
SetBit(t->statues, _current_player); // Once found and built, "inform" the Town
}
}