From b785577f03d00c83236782876def4c900edbba4e Mon Sep 17 00:00:00 2001
From: kwolekr <kwolekr@minetest.net>
Date: Tue, 5 May 2015 14:30:46 -0400
Subject: Add core.find_nodes_with_meta() script API

---
 src/map.cpp | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

(limited to 'src/map.cpp')

diff --git a/src/map.cpp b/src/map.cpp
index 9fead00c6..7f8059cc4 100644
--- a/src/map.cpp
+++ b/src/map.cpp
@@ -1890,6 +1890,40 @@ void Map::transformLiquids(std::map<v3s16, MapBlock*> & modified_blocks)
 	}
 }
 
+std::vector<v3s16> Map::findNodesWithMetadata(v3s16 p1, v3s16 p2)
+{
+	std::vector<v3s16> positions_with_meta;
+
+	sortBoxVerticies(p1, p2);
+	v3s16 bpmin = getNodeBlockPos(p1);
+	v3s16 bpmax = getNodeBlockPos(p2);
+
+	for (s16 z = bpmin.Z; z <= bpmax.Z; z++)
+	for (s16 y = bpmin.Y; y <= bpmax.Y; y++)
+	for (s16 x = bpmin.X; x <= bpmax.X; x++) {
+		v3s16 blockpos(x, y, z);
+
+		MapBlock *block = getBlockNoCreateNoEx(blockpos);
+		if (!block) {
+			verbosestream << "Map::getNodeMetadata(): Need to emerge "
+				<< PP(blockpos) << std::endl;
+			block = emergeBlock(blockpos, false);
+		}
+		if (!block) {
+			infostream << "WARNING: Map::getNodeMetadata(): Block not found"
+				<< std::endl;
+			continue;
+		}
+
+		v3s16 p_base = blockpos * MAP_BLOCKSIZE;
+		std::vector<v3s16> keys = block->m_node_metadata.getAllKeys();
+		for (size_t i = 0; i != keys.size(); i++)
+			positions_with_meta.push_back(keys[i] + p_base);
+	}
+
+	return positions_with_meta;
+}
+
 NodeMetadata *Map::getNodeMetadata(v3s16 p)
 {
 	v3s16 blockpos = getNodeBlockPos(p);
-- 
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