From 72e74c29d45bc81c4d7a5ba84e42b26bf11a4ffb Mon Sep 17 00:00:00 2001
From: celestar <celestar@openttd.org>
Date: Tue, 13 Feb 2007 16:36:38 +0000
Subject: (svn r8709) -Fix/Codechange: Rename the function GetStationPlatforms
 into GetPlatformLength because that is what it really does. Overload it
 because there is already a GetPlatformLength (one gives the length of the
 whole platform, the other gives the remaining length in a given direction).
 Turned both functions into methods of Station. While messing around with it,
 fix a problem where loading times for overhanging trains are miscomputed.

---
 src/station.cpp | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)

(limited to 'src/station.cpp')

diff --git a/src/station.cpp b/src/station.cpp
index 14f46abaf..e6e68631d 100644
--- a/src/station.cpp
+++ b/src/station.cpp
@@ -179,6 +179,56 @@ bool Station::TileBelongsToRailStation(TileIndex tile) const
 }
 
 
+/** Obtain the length of a platform
+ * @pre tile must be a railway station tile
+ * @param tile A tile that contains the platform in question
+ * @returns The length of the platform
+ */
+uint Station::GetPlatformLength(TileIndex tile) const
+{
+	TileIndex t;
+	TileIndexDiff delta;
+	uint len = 0;
+	assert(TileBelongsToRailStation(tile));
+
+	delta = (GetRailStationAxis(tile) == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
+
+	t = tile;
+	do {
+		t -= delta;
+		len++;
+	} while (IsCompatibleTrainStationTile(t, tile));
+
+	t = tile;
+	do {
+		t += delta;
+		len++;
+	} while (IsCompatibleTrainStationTile(t, tile));
+
+	return len - 1;
+}
+
+/** Determines the REMAINING length of a platform, starting at (and including)
+ * the given tile.
+ * @param tile the tile from which to start searching. Must be a railway station tile
+ * @param dir The direction in which to search.
+ * @return The platform length
+ */
+uint Station::GetPlatformLength(TileIndex tile, DiagDirection dir) const
+{
+	TileIndex start_tile = tile;
+	uint length = 0;
+	assert(IsRailwayStationTile(tile));
+	assert(dir < DIAGDIR_END);
+
+	do {
+		length ++;
+		tile += TileOffsByDiagDir(dir);
+	} while (IsCompatibleTrainStationTile(tile, start_tile));
+
+	return length;
+}
+
 /** Determines whether a station is a buoy only.
  * @todo Ditch this encoding of buoys
  */
-- 
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