From a3c4b7580b1f5e0ac6aa74ba8c702359d32eda27 Mon Sep 17 00:00:00 2001
From: Mattes D <github@xoft.cz>
Date: Thu, 30 Apr 2015 23:16:33 +0200
Subject: Added cBlockArea:CountNonAirBlocks API function.

---
 MCServer/Plugins/APIDump/APIDesc.lua |  1 +
 src/BlockArea.cpp                    | 31 +++++++++++++++++++++++++++++++
 src/BlockArea.h                      |  6 +++++-
 3 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/MCServer/Plugins/APIDump/APIDesc.lua b/MCServer/Plugins/APIDump/APIDesc.lua
index 7c9a2e0cb..7c0a8e818 100644
--- a/MCServer/Plugins/APIDump/APIDesc.lua
+++ b/MCServer/Plugins/APIDump/APIDesc.lua
@@ -99,6 +99,7 @@ g_APIDesc =
 				Clear = { Params = "", Return = "", Notes = "Clears the object, resets it to zero size" },
 				CopyFrom = { Params = "BlockAreaSrc", Return = "", Notes = "Copies contents from BlockAreaSrc into self" },
 				CopyTo = { Params = "BlockAreaDst", Return = "", Notes = "Copies contents from self into BlockAreaDst." },
+				CountNonAirBlocks = { Params = "", Return = "number", Notes = "Returns the count of blocks that are not air. Returns 0 if blocktypes not available. Block metas are ignored (if present, air with any meta is still considered air)." },
 				Create = { Params = "SizeX, SizeY, SizeZ, [DataTypes]", Return = "", Notes = "Initializes this BlockArea to an empty area of the specified size and origin of {0, 0, 0}. Any previous contents are lost." },
 				Crop = { Params = "AddMinX, SubMaxX, AddMinY, SubMaxY, AddMinZ, SubMaxZ", Return = "", Notes = "Crops the specified number of blocks from each border. Modifies the size of this blockarea object." },
 				DumpToRawFile = { Params = "FileName", Return = "", Notes = "Dumps the raw data into a file. For debugging purposes only." },
diff --git a/src/BlockArea.cpp b/src/BlockArea.cpp
index 600940d96..89cf18d4a 100644
--- a/src/BlockArea.cpp
+++ b/src/BlockArea.cpp
@@ -1634,6 +1634,37 @@ void cBlockArea::GetRelBlockTypeMeta(int a_RelX, int a_RelY, int a_RelZ, BLOCKTY
 
 
 
+size_t cBlockArea::CountNonAirBlocks(void) const
+{
+	// Check if blocktypes are valid:
+	if (m_BlockTypes == nullptr)
+	{
+		LOGWARNING("%s: BlockTypes have not been read!", __FUNCTION__);
+		return 0;
+	}
+
+	// Count the blocks:
+	size_t res = 0;
+	for (int y = 0; y < m_Size.y; y++)
+	{
+		for (int z = 0; z < m_Size.z; z++)
+		{
+			for (int x = 0; x < m_Size.x; x++)
+			{
+				if (m_BlockTypes[MakeIndex(x, y, z)] != E_BLOCK_AIR)
+				{
+					++res;
+				}
+			}  // for x
+		}  // for z
+	}  // for y
+	return res;
+}
+
+
+
+
+
 void cBlockArea::GetNonAirCropRelCoords(int & a_MinRelX, int & a_MinRelY, int & a_MinRelZ, int & a_MaxRelX, int & a_MaxRelY, int & a_MaxRelZ, BLOCKTYPE a_IgnoreBlockType)
 {
 	// Check if blocktypes are valid:
diff --git a/src/BlockArea.h b/src/BlockArea.h
index ce417ceb4..856df542f 100644
--- a/src/BlockArea.h
+++ b/src/BlockArea.h
@@ -303,7 +303,11 @@ public:
 	bool HasBlockMetas    (void) const { return (m_BlockMetas    != nullptr); }
 	bool HasBlockLights   (void) const { return (m_BlockLight    != nullptr); }
 	bool HasBlockSkyLights(void) const { return (m_BlockSkyLight != nullptr); }
-	
+
+	/** Returns the count of blocks that are not air.
+	Returns 0 if blocktypes not available. Block metas are ignored (if present, air with any meta is still considered air). */
+	size_t CountNonAirBlocks(void) const;
+
 	// tolua_end
 
 	/** Returns the minimum and maximum coords in each direction for the first non-ignored block in each direction.
-- 
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