1 files changed, 42 insertions, 0 deletions
diff --git a/src/Blocks/Mixins/DirtLikeUnderneath.h b/src/Blocks/Mixins/DirtLikeUnderneath.h
new file mode 100644
index 000000000..909f1601e
--- /dev/null
+++ b/src/Blocks/Mixins/DirtLikeUnderneath.h
@@ -0,0 +1,42 @@
+
+#pragma once
+
+#include "../../Chunk.h"
+
+/** Mixin to ensure the block has a dirt-like block underneath. */
+template <class Base>
+class cDirtLikeUnderneath :
+	public Base
+{
+	using Super = Base;
+public:
+
+	using Super::Super;
+
+	constexpr cDirtLikeUnderneath(BLOCKTYPE a_BlockType):
+		Base(a_BlockType)
+	{
+	}
+
+protected:
+
+	~cDirtLikeUnderneath() = default;
+
+protected:
+
+	virtual bool CanBeAt(const cChunk & a_Chunk, const Vector3i a_Position, const NIBBLETYPE a_Meta) const override
+	{
+		if (!Super::CanBeAt(a_Chunk, a_Position, a_Meta))
+		{
+			return false;
+		}
+
+		const auto BelowPos = a_Position.addedY(-1);
+		if (!cChunkDef::IsValidHeight(BelowPos))
+		{
+			return false;
+		}
+
+		return IsBlockTypeOfDirt(a_Chunk.GetBlock(BelowPos));
+	}
+};