1 files changed, 17 insertions, 0 deletions
diff --git a/src/bridge_map.cpp b/src/bridge_map.cpp
index 9fb4cf413..c89af44d5 100644
--- a/src/bridge_map.cpp
+++ b/src/bridge_map.cpp
@@ -32,24 +32,41 @@ static TileIndex GetBridgeEnd(TileIndex tile, DiagDirection dir)
 }
 
 
+/**
+ * Finds the northern end of a bridge starting at a middle tile
+ * @param t the bridge tile to find the bridge ramp for
+ */
 TileIndex GetNorthernBridgeEnd(TileIndex t)
 {
 	return GetBridgeEnd(t, ReverseDiagDir(AxisToDiagDir(GetBridgeAxis(t))));
 }
 
 
+/**
+ * Finds the southern end of a bridge starting at a middle tile
+ * @param t the bridge tile to find the bridge ramp for
+ */
 TileIndex GetSouthernBridgeEnd(TileIndex t)
 {
 	return GetBridgeEnd(t, AxisToDiagDir(GetBridgeAxis(t)));
 }
 
 
+/**
+ * Starting at one bridge end finds the other bridge end
+ * @param t the bridge ramp tile to find the other bridge ramp for
+ */
 TileIndex GetOtherBridgeEnd(TileIndex tile)
 {
 	assert(IsBridgeTile(tile));
 	return GetBridgeEnd(tile, GetTunnelBridgeDirection(tile));
 }
 
+/**
+ * Get the height ('z') of a bridge in pixels.
+ * @param tile the bridge ramp tile to get the bridge height from
+ * @return the height of the bridge in pixels
+ */
 uint GetBridgeHeight(TileIndex t)
 {
 	uint h;