Add node pos to node damage HP change reason (#13196)

doc/lua_api.txt

@@ -5266,6 +5266,7 @@ Call these functions only at load time!
             * `fall`
             * `node_damage`: `damage_per_second` from a neighboring node.
                              `reason.node` will hold the node name or nil.
+                             `reason.node_pos` will hold the position of the node
             * `drown`
             * `respawn`
         * Any of the above types may have additional fields from mods.

src/script/cpp_api/s_base.cpp

@@ -488,6 +488,9 @@ void ScriptApiBase::pushPlayerHPChangeReason(lua_State *L, const PlayerHPChangeR
 	if (!reason.node.empty()) {
 		lua_pushstring(L, reason.node.c_str());
 		lua_setfield(L, -2, "node");
+
+		push_v3s16(L, reason.node_pos);
+		lua_setfield(L, -2, "node_pos");
 	}
 }
 

src/server/player_sao.cpp

@@ -185,6 +185,7 @@ void PlayerSAO::step(float dtime, bool send_recommended)
 	if (!isImmortal() && m_node_hurt_interval.step(dtime, 1.0f)) {
 		u32 damage_per_second = 0;
 		std::string nodename;
+        v3s16 node_pos;
 		// Lowest and highest damage points are 0.1 within collisionbox
 		float dam_top = m_prop.collisionbox.MaxEdge.Y - 0.1f;
 
@@ -198,6 +199,7 @@ void PlayerSAO::step(float dtime, bool send_recommended)
 			if (c.damage_per_second > damage_per_second) {
 				damage_per_second = c.damage_per_second;
 				nodename = c.name;
+                node_pos = p;
 			}
 		}
 
@@ -209,11 +211,12 @@ void PlayerSAO::step(float dtime, bool send_recommended)
 		if (c.damage_per_second > damage_per_second) {
 			damage_per_second = c.damage_per_second;
 			nodename = c.name;
+            node_pos = ptop;
 		}
 
 		if (damage_per_second != 0 && m_hp > 0) {
 			s32 newhp = (s32)m_hp - (s32)damage_per_second;
-			PlayerHPChangeReason reason(PlayerHPChangeReason::NODE_DAMAGE, nodename);
+			PlayerHPChangeReason reason(PlayerHPChangeReason::NODE_DAMAGE, nodename, node_pos);
 			setHP(newhp, reason);
 		}
 	}

src/server/player_sao.h

@@ -245,6 +245,7 @@ struct PlayerHPChangeReason
 	ServerActiveObject *object = nullptr;
 	// For NODE_DAMAGE
 	std::string node;
+    v3s16 node_pos;
 
 	inline bool hasLuaReference() const { return lua_reference >= 0; }
 
@@ -296,5 +297,5 @@ struct PlayerHPChangeReason
 	{
 	}
 
-	PlayerHPChangeReason(Type type, std::string node) : type(type), node(node) {}
+	PlayerHPChangeReason(Type type, std::string node, v3s16 node_pos) : type(type), node(node), node_pos(node_pos) {}
 };