[Unsolved] Entity Navigation

I am trying to achieve controlled entity movement using the code below.

Code:java

 
Object entityLiving = pet.getClass().getMethod("getHandle").invoke(pet);
Object navigation = entityLiving.getClass().getMethod("getNavigation").invoke(entityLiving);
Method nav_a = navigation.getClass().getMethod("a");
nav_a.invoke(navigation, new Object[] {l.getX(), l.getY(), l.getZ(), 0.4f});
 
 
/*net.minecraft.server.v1_5_R3.Navigation nav = ((net.minecraft.server.v1_5_R3.EntityLiving) ((org.bukkit.craftbukkit.v1_5_R3.entity.CraftEntity) pet).getHandle()).getNavigation();
nav.a(l.getX(), l.getY(), l.getZ(), 0.4f);*/
 

If it helps, this is the error it produces:

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Code:

 
20:46:15 [SEVERE] java.lang.IllegalArgumentException
20:46:15 [SEVERE]at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source)
20:46:15 [SEVERE]at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
20:46:15 [SEVERE]at java.lang.reflect.Method.invoke(Method.java:597)
20:46:15 [SEVERE]at me.dsh105.echopet.data.Navigation$1.run(Navigation.java:93)
20:46:15 [SEVERE]at org.bukkit.craftbukkit.v1_5_R3.scheduler.CraftTask.run(CraftTask.java:53)
20:46:15 [SEVERE]at org.bukkit.craftbukkit.v1_5_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345)
20:46:15 [SEVERE]at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:513)
20:46:15 [SEVERE]at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:226)
20:46:15 [SEVERE]at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:477)
20:46:15 [SEVERE]at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:410)
20:46:15 [SEVERE]at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)

Line 93 is the "nav_a.invoke" bit.

The NMS version-dependent method works well. Can someone help me see where I can improve?

 

I've never done this before, but my guess would be that either a) the array you're passing to the method is of an improper size, or b) there's something wrong with "l".

 

AngryNerd
Yeah, it's just that the method commented uses exactly the same arguments and it works fine.

Bump. No-one else know this?

EDIT: I think there's a problem getting the actual 'EntityLiving' through reflection, but I'm not entirely sure how to fix it.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Hello _DSH105_,
try change

PHP:

nav_a.invoke(navigation, new Object[] {l.getX(), l.getY(), l.getZ(), 0.4f});

to:

PHP:

nav_a.invoke(navigation,l.getX(), l.getY(), l.getZ(), 0.4f);

 

Produces the same error. I think I need to cast entityLiving to EntityLiving before calling getNavigation()...But I'm not sure how to do that.

Final bump...

I guess this is going to have to remain unsolved then :\

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

You seem to be looking in the wrong place for controlling movement up to actually modifing the ai, I would recommend looking into the pathfinding of the entity. Adding different targeting to entities or swapping around how the target and goal selector is stacked may help however I would tread lightly in this realm.

https://github.com/Bukkit/CraftBukk...va/net/minecraft/server/EntityPig.java#L16-25

Also with this in mind entity living is a super class to basically any entity that moves, and from what I can tell that method in Navigation.class doesn't do what you think it does.