1 files changed, 34 insertions, 27 deletions

diff --git a/src/Entities/ProjectileEntity.cpp b/src/Entities/ProjectileEntity.cpp
index 95c494569..d45f1d212 100644
--- a/src/Entities/ProjectileEntity.cpp
+++ b/src/Entities/ProjectileEntity.cpp
@@ -67,16 +67,17 @@ protected:
 		
 		if (cBlockInfo::IsSolid(a_BlockType))
 		{
-			// The projectile hit a solid block
-			// Calculate the exact hit coords:
-			cBoundingBox bb(a_BlockX, a_BlockX + 1, a_BlockY, a_BlockY + 1, a_BlockZ, a_BlockZ + 1);
-			Vector3d Line1 = m_Projectile->GetPosition();
-			Vector3d Line2 = Line1 + m_Projectile->GetSpeed();
-			double LineCoeff = 0;
-			eBlockFace Face;
-			if (bb.CalcLineIntersection(Line1, Line2, LineCoeff, Face))
+			// The projectile hit a solid block, calculate the exact hit coords:
+			cBoundingBox bb(a_BlockX, a_BlockX + 1, a_BlockY, a_BlockY + 1, a_BlockZ, a_BlockZ + 1); // Bounding box of the block hit
+			const Vector3d LineStart = m_Projectile->GetPosition(); // Start point for the imaginary line that goes through the block hit
+			const Vector3d LineEnd = LineStart + m_Projectile->GetSpeed(); // End point for the imaginary line that goes through the block hit
+			double LineCoeff = 0; // Used to calculate where along the line an intersection with the bounding box occurs
+			eBlockFace Face; // Face hit
+
+			if (bb.CalcLineIntersection(LineStart, LineEnd, LineCoeff, Face))
 			{
-				Vector3d Intersection = Line1 + m_Projectile->GetSpeed() * LineCoeff;
+				Vector3d Intersection = LineStart + m_Projectile->GetSpeed() * LineCoeff; // Point where projectile goes into the hit block
+
 				if (cPluginManager::Get()->CallHookProjectileHitBlock(*m_Projectile, a_BlockX, a_BlockY, a_BlockZ, Face, &Intersection))
 				{
 					return false;
@@ -161,7 +162,12 @@ public:
 			return false;
 		}
 
-		// TODO: Some entities don't interact with the projectiles (pickups, falling blocks)
+		if (!a_Entity->IsMob() && !a_Entity->IsMinecart() && !a_Entity->IsPlayer() && !a_Entity->IsBoat())
+		{
+			// Not an entity that interacts with a projectile
+			return false;
+		}
+
 		if (cPluginManager::Get()->CallHookProjectileHitEntity(*m_Projectile, *a_Entity))
 		{
 			// A plugin disagreed.
@@ -316,8 +322,9 @@ AString cProjectileEntity::GetMCAClassName(void) const
 void cProjectileEntity::Tick(float a_Dt, cChunk & a_Chunk)
 {
 	super::Tick(a_Dt, a_Chunk);
-
-	if (GetProjectileKind() != pkArrow) // See cArrow::Tick
+	
+	// TODO: see BroadcastMovementUpdate; RelativeMove packet jerkiness affects projectiles too (cause of sympton described in cArrowEntity::Tick())
+	if (GetProjectileKind() != pkArrow)
 	{
 		BroadcastMovementUpdate();
 	}
@@ -335,19 +342,10 @@ void cProjectileEntity::HandlePhysics(float a_Dt, cChunk & a_Chunk)
 		return;
 	}
 	
-	Vector3d PerTickSpeed = GetSpeed() / 20;
-	Vector3d Pos = GetPosition();
-	
-	// Trace the tick's worth of movement as a line:
-	Vector3d NextPos = Pos + PerTickSpeed;
-	cProjectileTracerCallback TracerCallback(this);
-	if (!cLineBlockTracer::Trace(*m_World, TracerCallback, Pos, NextPos))
-	{
-		// Something has been hit, abort all other processing
-		return;
-	}
-	// The tracer also checks the blocks for slowdown blocks - water and lava - and stores it for later in its SlowdownCoeff
-	
+	const Vector3d PerTickSpeed = GetSpeed() / 20;
+	const Vector3d Pos = GetPosition();
+	const Vector3d NextPos = Pos + PerTickSpeed;
+
 	// Test for entity collisions:
 	cProjectileEntityCollisionCallback EntityCollisionCallback(this, Pos, NextPos);
 	a_Chunk.ForEachEntity(EntityCollisionCallback);
@@ -363,11 +361,20 @@ void cProjectileEntity::HandlePhysics(float a_Dt, cChunk & a_Chunk)
 			EntityCollisionCallback.GetHitEntity()->GetClass(),
 			HitPos.x, HitPos.y, HitPos.z,
 			EntityCollisionCallback.GetMinCoeff()
-		);
-		
+			);
+
 		OnHitEntity(*(EntityCollisionCallback.GetHitEntity()), HitPos);
 	}
 	// TODO: Test the entities in the neighboring chunks, too
+	
+	// Trace the tick's worth of movement as a line:
+	cProjectileTracerCallback TracerCallback(this);
+	if (!cLineBlockTracer::Trace(*m_World, TracerCallback, Pos, NextPos))
+	{
+		// Something has been hit, abort all other processing
+		return;
+	}
+	// The tracer also checks the blocks for slowdown blocks - water and lava - and stores it for later in its SlowdownCoeff
 
 	// Update the position:
 	SetPosition(NextPos);