The difference of SetValue node in blackboard

alwei · July 21, 2015, 4:55pm

I created a service BP in the behavior tree, wrote a value to the blackboard.

check the value immediately after the SetValue node. It was not a legal value.

I tried another means. With this method, you can retrieve the legal value.

What are these differences?

SetValue is fail.

SetValue is success.

anonymous_user_6199feb8 · July 21, 2015, 5:34pm

Did u select a blackboard key on your service in the bt for the TargetDistance-Keyselector?

alwei · July 21, 2015, 5:52pm

Yes. TargetDistance is selected the Blackboard KeySelector.

GodOfPen · July 22, 2015, 1:23am

I made a test Service like this ,it worked.

I think you can try this:

make a simple service like this and check the result.If the result is right.
set a break point in C++ code and see the result of GetBlackboard(),check the value is nullptr,
Agree with ,I still think the problem is your key selector

God of Pen

alwei · July 22, 2015, 6:58am

Isolved.

It is a very trivial matter.

Blackboard KeySelector will not work unless you set the Default as shown in the figure.