From: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
Date: Tue, 16 Aug 2011 05:24:01 +0000 (+0200)
Subject: Ensure air neighbors to liquids that can flow are enqueued for transformation
X-Git-Url: http://81.2.79.47:8989/gitweb/?a=commitdiff_plain;h=d0711821f3a4ec2d2e41c7baae37329972781ef3;p=zefram%2Fminetest%2Fminetest_engine.git

Ensure air neighbors to liquids that can flow are enqueued for transformation
---

diff --git a/src/map.cpp b/src/map.cpp
index 6092538f..fa88e846 100644
--- a/src/map.cpp
+++ b/src/map.cpp
@@ -1629,9 +1629,15 @@ void Map::transformLiquids(core::map<v3s16, MapBlock*> & modified_blocks)
 				case LIQUID_NONE:
 					if (nb.n.getContent() == CONTENT_AIR) {
 						airs[num_airs++] = nb;
+						// if the current node is a water source the neighbor
+						// should be enqueded for transformation regardless of whether the
+						// current node changes or not.
+						if (nb.t != NEIGHBOR_UPPER && liquid_type != LIQUID_NONE)
+							m_transforming_liquid.push_back(npos);
 						// if the current node happens to be a flowing node, it will start to flow down here.
-						if (nb.t == NEIGHBOR_LOWER)
+						if (nb.t == NEIGHBOR_LOWER) {
 							flowing_down = true;
+						}
 					} else {
 						neutrals[num_neutrals++] = nb;
 					}