1 files changed, 111 insertions, 0 deletions
diff --git a/Minecraft.World/StructureStart.cpp b/Minecraft.World/StructureStart.cpp
new file mode 100644
index 00000000..22a4312c
--- /dev/null
+++ b/Minecraft.World/StructureStart.cpp
@@ -0,0 +1,111 @@
+#include "stdafx.h"
+#include "net.minecraft.world.level.h"
+#include "StructureStart.h"
+#include "StructurePiece.h"
+#include "BoundingBox.h"
+
+
+StructureStart::StructureStart()
+{
+	boundingBox = NULL;		// 4J added initialiser
+}
+
+StructureStart::~StructureStart()
+{
+	for(AUTO_VAR(it, pieces.begin()); it != pieces.end(); it++ )
+	{
+		delete (*it);
+	}
+	delete boundingBox;
+}
+
+BoundingBox *StructureStart::getBoundingBox()
+{
+	return boundingBox;
+}
+
+list<StructurePiece *> *StructureStart::getPieces()
+{
+	return &pieces;
+}
+
+void StructureStart::postProcess(Level *level, Random *random, BoundingBox *chunkBB)
+{
+	AUTO_VAR(it, pieces.begin());
+
+	while( it != pieces.end() )
+	{
+		if( (*it)->getBoundingBox()->intersects(chunkBB) && !(*it)->postProcess(level, random, chunkBB))
+		{
+            // this piece can't be placed, so remove it to avoid future
+            // attempts
+			it = pieces.erase(it);
+		}
+		else
+		{
+			it++;
+		}
+	}
+}
+
+void StructureStart::calculateBoundingBox()
+{
+    boundingBox = BoundingBox::getUnknownBox();
+
+	for( AUTO_VAR(it, pieces.begin()); it != pieces.end(); it++ )
+	{
+		StructurePiece *piece = *it;
+		boundingBox->expand(piece->getBoundingBox());
+	}
+}
+
+void StructureStart::moveBelowSeaLevel(Level *level, Random *random, int offset)
+{
+	const int MAX_Y = level->seaLevel - offset;
+
+    // set lowest possible position (at bedrock)
+    int y1Pos = boundingBox->getYSpan() + 1;
+    // move up randomly within the available span
+    if (y1Pos < MAX_Y)
+	{
+        y1Pos += random->nextInt(MAX_Y - y1Pos);
+    }
+
+    // move all bounding boxes
+    int dy = y1Pos - boundingBox->y1;
+    boundingBox->move(0, dy, 0);
+	for( AUTO_VAR(it, pieces.begin()); it != pieces.end(); it++ )
+	{
+		StructurePiece *piece = *it;
+        piece->getBoundingBox()->move(0, dy, 0);
+    }
+}
+
+void StructureStart::moveInsideHeights(Level *level, Random *random, int lowestAllowed, int highestAllowed)
+{
+    int heightSpan = highestAllowed - lowestAllowed + 1 - boundingBox->getYSpan();
+    int y0Pos = 1;
+
+    if (heightSpan > 1)
+	{
+        y0Pos = lowestAllowed + random->nextInt(heightSpan);
+    }
+	else
+	{
+        y0Pos = lowestAllowed;
+    }
+
+    // move all bounding boxes
+    int dy = y0Pos - boundingBox->y0;
+    boundingBox->move(0, dy, 0);
+	for( AUTO_VAR(it, pieces.begin()); it != pieces.end(); it++ )
+	{
+		StructurePiece *piece = *it;
+        piece->getBoundingBox()->move(0, dy, 0);
+    }
+}
+
+bool StructureStart::isValid()
+{
+	return true;
+}
+\ No newline at end of file