1 files changed, 60 insertions, 0 deletions

diff --git a/src/Mobs/Behaviors/BehaviorWanderer.cpp b/src/Mobs/Behaviors/BehaviorWanderer.cpp
new file mode 100644
index 000000000..53efd407c
--- /dev/null
+++ b/src/Mobs/Behaviors/BehaviorWanderer.cpp
@@ -0,0 +1,60 @@
+#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
+#include "BehaviorWanderer.h"
+#include "../Monster.h"
+#include "../../Chunk.h"
+#include "../../World.h"
+
+cBehaviorWanderer::cBehaviorWanderer(cMonster * a_Parent)
+	: m_Parent(a_Parent)
+	, m_IdleInterval(0)
+{
+	ASSERT(m_Parent != nullptr);
+}
+
+bool cBehaviorWanderer::ActiveTick(std::chrono::milliseconds a_Dt, cChunk & a_Chunk)
+{
+	if (m_Parent->IsPathFinderActivated())
+	{
+		return true;  // Still getting there
+	}
+
+	m_IdleInterval += a_Dt;
+
+	if (m_IdleInterval > std::chrono::seconds(1))
+	{
+		// At this interval the results are predictable
+		int rem = m_Parent->GetWorld()->GetTickRandomNumber(6) + 1;
+		m_IdleInterval -= std::chrono::seconds(1);  // So nothing gets dropped when the server hangs for a few seconds
+
+		Vector3d Dist;
+		Dist.x = static_cast<double>(m_Parent->GetWorld()->GetTickRandomNumber(10)) - 5.0;
+		Dist.z = static_cast<double>(m_Parent->GetWorld()->GetTickRandomNumber(10)) - 5.0;
+
+		if ((Dist.SqrLength() > 2)  && (rem >= 3))
+		{
+
+			Vector3d Destination(m_Parent->GetPosX() + Dist.x, m_Parent->GetPosition().y, m_Parent->GetPosZ() + Dist.z);
+
+			cChunk * Chunk = a_Chunk.GetNeighborChunk(static_cast<int>(Destination.x), static_cast<int>(Destination.z));
+			if ((Chunk == nullptr) || !Chunk->IsValid())
+			{
+				return true;
+			}
+
+			BLOCKTYPE BlockType;
+			NIBBLETYPE BlockMeta;
+			int RelX = static_cast<int>(Destination.x) - Chunk->GetPosX() * cChunkDef::Width;
+			int RelZ = static_cast<int>(Destination.z) - Chunk->GetPosZ() * cChunkDef::Width;
+			int YBelowUs = static_cast<int>(Destination.y) - 1;
+			if (YBelowUs >= 0)
+			{
+				Chunk->GetBlockTypeMeta(RelX, YBelowUs, RelZ, BlockType, BlockMeta);
+				if (BlockType != E_BLOCK_STATIONARY_WATER)  // Idle mobs shouldn't enter water on purpose
+				{
+					m_Parent->MoveToPosition(Destination);
+				}
+			}
+		}
+	}
+	return true;
+}