[1.9] Is it possible to spawn primer TNT without an EntityLivingBase?

[American2050]

To create Primed TNT I need to have an "Igniter"

 

EntityTNTPrimed(World worldIn, double x, double y, double z, EntityLivingBase igniter)

 

But what happens if I dont have an entity to associate the event with? This needs to be called within onNeighborBlockChange

 

How would I go around this?

[Choonster]

If the TNT wasn't ignited by an entity, just pass

null

.

 

If you look at the doc comment or usages of

EntityTNTPrimed#getTntPlacedBy

(which returns the

EntityLivingBase

passed to the constructor), you'll see that

null

is a valid and expected return value.

[Draco18s]

Other project I was working with named a paramter like that as "[ x ]OrNull" e.g. "igniterOrNull" to make it clear that it was a parameter that wouldn't throw NPE if you passed in null, as it was intended to handle such things.

[Draco18s]

I didn't know about @Nullable. Not that I'm surprised.

 

The thing I was talking about was a function parameter not a return value on an interface.

 

For example, using the OP's method:

public void EntityTNTPrimed(World worldIn, double x, double y, double z, EntityLivingBase igniterOrNull) {...}

 

Is there a cleaner way of doing it there?  The point I was trying to raise is "MCP could note this kind of stuff and it would be useful." (I just don't care how)

[Draco18s]

Ah, neat.

Learn something new every day.

[Draco18s]

Poked around in C# (my Unity3D project) seeing if it had nullable parameters and it does, but for the simple types (e.g.

someMethod(int? nullableIntVar){}

) but not for the complex types, as complex objects can already be assumed to be capable of being null.  So the project I was working in that had a "[ x ]OrNull" parameter was justified in making the name indicate that the method could handle null values being pased vs. a "this object must not be null" method.

 

I should note that the .NET version for Unity is garbage: 2.0, updating to a newer version is under the "research" category on the roadmap.  I.e. not even on the "long term development" track yet, much less the next two releases.