Metaobjects and PlayerPlaceItemEvent bug? And a new issue on Tanning rack?

Bamse · 2026-05-13T08:10:10+02:00

Hi

First thx for adding this new event!

Now i try to use but i hit some issue. For persistent item placement it work as expected, but it is a issue when try to add items on a metabject (furnace, grill). For example when i want to put ore in furnace, ore gone from inventory but on furnace don't appear nothing and i can put in same slot over and over new ore. If i don't use at all new event i can put items in metaobjects! it's like, with new event activated is canceled by default when put items in metaobjects!

For testing purpose i use following code:

Java

package bamse.rw;

import net.risingworld.api.Plugin;
import net.risingworld.api.definitions.Objects.ObjectInfoDefinition;
import net.risingworld.api.events.EventMethod;
import net.risingworld.api.events.Listener;
import net.risingworld.api.events.player.PlayerPickupItemEvent;
import net.risingworld.api.events.player.world.PlayerPlaceItemEvent;
import net.risingworld.api.objects.Item;
import net.risingworld.api.objects.MetaObject;
import net.risingworld.api.objects.Player;
import net.risingworld.api.objects.WorldItem;
import net.risingworld.api.objects.WorldItem.WorldItemType;
import net.risingworld.api.utils.Vector3f;


public class PermanentItemPlacement2 implements Listener {
    protected Plugin plugin=null;    // reference to plugin
    public PermanentItemPlacement2(Plugin testPlugin) {
        this.plugin=testPlugin;
    }

    @EventMethod
    public void onPlayerPlaceItem(PlayerPlaceItemEvent evt) {
        Player p=evt.getPlayer();
        Item item=evt.getInventoryItem();
        MetaObject station=evt.getMetaObject();
        if (station!=null) {
            // place a item in craft station
            ObjectInfoDefinition def= station.getObjectInfoDefinition();
            Vector3f pos=station.getWorldPosition();
            print("Player %s place a item %s into %s located at coordinate %.2f %.2f %.2f",p.getName(),item.getName(),def.name,pos.x,pos.y,pos.z);
            // Allow other to fill a owner craft station? Why not!
        } else {
            // place a permanent item
            Vector3f pos=evt.getPosition();
            print("Player %s place a persistent item %s at coordinates  %.2f %.2f %.2f",p.getName(),item.getName(),pos.x,pos.y,pos.z);
            // check condition and cancel if not owner or friend with build permissions
        }
        
    }
    
    @EventMethod
    public void onPlayerPickupEvent(PlayerPickupItemEvent evt) {
        Player p=evt.getPlayer();
        WorldItem item=evt.getItem();
        WorldItemType type = item.getWorldItemType();
        print("Player %s picked a WorldItem %s of type %s",p.getName(),item.getName(),type.name());
        
        if (item.isPersistent()) {        // type==WorldItemType.PersistentDynamic || type==WorldItemType.PersistentStatic
            // Player take a persistent placed item
            print("   Try to pickup a permanent item placed! Check permission and deny if not a friend with building right!");
            // here cancel event if player don't have right to take permanent item 
        } else if (item.isMetaObjectItem()) { // type==WorldItemType.MetaObject
            // Player take item got from crafting station (furnace,grill,oven,etc.)
            print("   Try to pickup a item from a craft station! Check permission and deny if not a owner or friend with inventory right!");
            MetaObject station = item.getRelatedMetaObject();
            if (station!=null) {
                // I have a craft station
                ObjectInfoDefinition def= station.getObjectInfoDefinition();
                Vector3f pos=station.getWorldPosition();
                print("   Item got from a %s placed at coordinate %.2f %.2f %.2f",def.name,pos.x,pos.y,pos.z);
            }
            // here cancel event if player don't have right to pickup items from crafting stations (furnace,grill,etc.) 
        } else if (type==WorldItemType.Default) {
            print("   Try to pickup a item from ground! It's safe to get dropped item to ground regarding ownership!");
            // player take a item dropped to ground ?
        } else {
            // Other 2 cases:
            //    WorldType==WorldItemType.Attached
            //    WorldType==WorldItemType.Static
            
            // here not sure from what source item come. need more research
            // probable need to cancel if player don't have right
        }
        
    }
    
    // Print to console
    public void print(String s) {
        System.out.println(s);
    }
    
    // Print to console a formated string with a list of arguments 
    public void print(String f, Object... args ) {
        if (f==null) {
            f="";
        }
        print(String.format(f, args));
    }
}

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From logs:

Code

[Java] Player Bamse place a item ironore into furnace located at coordinate 1699.72 94.30 1788.76    <--- Here i placed a ore in furnace, but in furnace appear nothing
[Java] Player Bamse picked a WorldItem ironore of type MetaObject                                    <--- here i take a ore from furnace
[Java]    Try to pickup a item from a craft station! Check permission and deny if not a owner or friend with inventory right!
[Java]    Item got from a furnace placed at coordinate 1699.72 94.30 1788.76
Remove item ironore (2032444) from meta object 89067
SERVER: PLAYER Bamse (76561198869958751) PLACED ITEM steakburned @ (1698.98, 93.82, 1784.41)         <--- Here i placed a persistent item
[Java] Player Bamse place a persistent item steakburned at coordinates  1698.98 93.82 1784.41
[Java] Player Bamse picked a WorldItem steakburned of type PersistentStatic                          <--- Here i pickup a persistent item
[Java]    Try to pickup a permanent item placed! Check permission and deny if not a friend with building right!
[Java] Player Bamse picked a WorldItem breadhalf of type Default                                     <--  Here i pickup a dropped item on ground
[Java]    Try to pickup a item from ground! It's safe to get dropped item to ground regarding ownership!

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Thx

Bamse

red51 · 2026-05-13T11:35:13+02:00

Thanks for letting me know! I can confirm that there is an issue with placing items in the furnace... unfortunately the item position is wrong, the item is located at the position of the furnace (instead of the item slot) This happens as soon as the PlayerPlaceItemEvent is present...

I will prepare a fix for that shortly!

Bamse · 2026-05-13T11:55:03+02:00

BTW. Problem is not particularly with a furnace, but other metaobjects too like grill, oven,etc.

Bamse · 2026-05-14T09:59:02+02:00

I don't see mention anywhere as issue is fixed, but after server update from yesterday, it seems new event PlayerPlaceItemEvent is fixed!

I test with a few metaobjects:

- Furnace - ok

- drying rack - ok

- oven - ok

- grill - ok

- skewer - ok

- grinder - ok

-paper press - ok

But with tanning rack i encountered a new issue. I don't think is related with first one but same code who works for other station here give error because when i call method to retrieve definition of metaobject, return null if metaobject is a tanning rack!

Code

    @EventMethod
    public void onPlayerPlaceItem(PlayerPlaceItemEvent evt) {
        Player p=evt.getPlayer();
        Item item=evt.getInventoryItem();
        MetaObject station=evt.getMetaObject();
        if (station!=null) {
            // place a item in craft station
            ObjectInfoDefinition def= station.getObjectInfoDefinition();   // <-- Here for tanning rack return null !!!
            Vector3f pos=station.getWorldPosition();
            print("Player %s place a item %s into %s located at coordinate %.2f %.2f %.2f",p.getName(),item.getName(),def.name,pos.x,pos.y,pos.z);
            // Allow other to fill a owner craft station? Why not!
        } else {
            // place a permanent item
            Vector3f pos=evt.getPosition();
            print("Player %s place a persistent item %s at coordinates  %.2f %.2f %.2f",p.getName(),item.getName(),pos.x,pos.y,pos.z);
            // check condition and cancel if not owner or friend with build permissions
            //evt.setCancelled(true);
        }

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from log:

Code

[10:49:11] [ADMIN MESSAGE] (Notification) EXCEPTION OCCURRED IN PLUGIN 'TestRw' (AUTHOR: Bamse)         <-- here i put a hide in tanning rack 
-> java.lang.NullPointerException: Cannot read field "name" because "def" is null
    at PLUGIN_CLASS_LOADER//bamse.rw.PermanentItemPlacement2.onPlayerPlaceItem(PermanentItemPlacement2.java:32)
    at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
    at java.base/java.lang.reflect.Method.invoke(Method.java:578)
    at net.jiw.unity.runtime.PluginEventHandler.triggerEvent(PluginEventHandler.java:138)
 16711680 
Object tanningrack (2060346) change info 0 -> 745

Note (after more research):

It seems tanning rack is a special object and not a metaobject? Maybe must threat same as a meta object? I can pickup hide from him and no event PlayerPickupItemEvent fired at all! (New event

PlayerPlaceItemEvent is fired).

So no way to know if item (hide or leather) is take from tanning rack or how to deny take item from him on some condition?

Thx

Bamse

Metaobjects and PlayerPlaceItemEvent bug? And a new issue on Tanning rack?

Bamse 2 hours ago

Participate now!