1 files changed, 66 insertions, 0 deletions
diff --git a/src/Items/ItemTrapdoor.h b/src/Items/ItemTrapdoor.h
new file mode 100644
index 000000000..9cb89b8bf
--- /dev/null
+++ b/src/Items/ItemTrapdoor.h
@@ -0,0 +1,66 @@
+
+#pragma once
+
+#include "ItemHandler.h"
+#include "Blocks/BlockTrapdoor.h"
+
+
+
+
+
+class cItemTrapdoorHandler :
+	public cItemHandler
+{
+	using Super = cItemHandler;
+
+public:
+
+	using Super::Super;
+
+private:
+
+	inline static NIBBLETYPE BlockFaceToMetaData(eBlockFace a_BlockFace)
+	{
+		switch (a_BlockFace)
+		{
+			case BLOCK_FACE_ZP: return 0x1;
+			case BLOCK_FACE_ZM: return 0x0;
+			case BLOCK_FACE_XP: return 0x3;
+			case BLOCK_FACE_XM: return 0x2;
+			default: UNREACHABLE("Unsupported block face");
+		}
+	}
+
+
+	virtual bool CommitPlacement(cPlayer & a_Player, const cItem & a_HeldItem, const Vector3i a_PlacePosition, const eBlockFace a_ClickedBlockFace, const Vector3i a_CursorPosition) override
+	{
+		NIBBLETYPE Meta;
+
+		if (a_ClickedBlockFace == BLOCK_FACE_YP)
+		{
+			// Trapdoor is placed on top of a block.
+			// Engage yaw rotation to determine hinge direction:
+			Meta = cBlockTrapdoorHandler::YawToMetaData(a_Player.GetYaw());
+		}
+		else if (a_ClickedBlockFace == BLOCK_FACE_YM)
+		{
+			// Trapdoor is placed on bottom of a block.
+			// Engage yaw rotation to determine hinge direction, and toggle 'Move up half-block' bit on:
+			Meta = cBlockTrapdoorHandler::YawToMetaData(a_Player.GetYaw()) | 0x8;
+		}
+		else
+		{
+			// Placement on block sides; hinge direction is determined by which side was clicked:
+			Meta = BlockFaceToMetaData(a_ClickedBlockFace);
+
+			if (a_CursorPosition.y > 7)
+			{
+				// Trapdoor is placed on a higher half of a vertical block.
+				// Toggle 'Move up half-block' bit on:
+				Meta |= 0x8;
+			}
+		}
+
+		return a_Player.PlaceBlock(a_PlacePosition, static_cast<BLOCKTYPE>(a_HeldItem.m_ItemType), Meta);
+	}
+};