Blueprint Dialogue System

[gm0124816]

@Grogger;534458

Hi Ednoc, I’m glad you’re enjoying the system so far!

Yep, it was built with scripting in mind. There’s a built in Blueprint-Only script interpreter that you might have noticed, and this is hooked into the dialogue system so you can achieve what you’re asking.

What will help you with your example is the Hub and Silent traits, Script Variables, and Conditions.

**For example: **

A has two dialogue options: 1) Hi, go talk to B; 2) Great, you’ve talked to B!

We want (1) to run when the player hasn’t spoken to B, so in the Condition column we will check to see if a variable is set: !isvalid(hasTalkedToB) || !hasTalkedToB
If the conditions fail, the dialogue doesn’t run, so in this case we only want the player to say “Hi, go talk to B” if the variable hasTalkedToB doesn’t exist (isvalid returns false if it doesn’t exist), or the variable is false.

We want (2) to run when the player HAS spoken to B, so the Condition column would be isvalid(hasTalkedToB) && hasTalkedToB

The next thing we need is a new dialogue row to act as the hub and selects the right dialogue to say. A dialogue entry with the Silent and Hub traits in the trait column (eg. Silent; Hub;) will automatically select the next valid branch from the Branch column (eg. branches TalkToB; HasTalkedToB;) to process. The first dialogue to pass the ‘conditions’ test will execute.

The last part of the example is actually talking to B and setting the variable when the player talks to NPC B. The PostAction column is a good place to set new variables or call functions, and we would set hasTalkedToB=true in that column. Once set, the player would talk to NPC A again, this NPC’s current branch would be the HUB branch we made, then the HUB would try to see if TalkToB branch is valid, the condition would fail

The following sections in the documentation should help you out with advanced functionality:

Conditions, Use Conditions, Functions, Custom Functions, Scripting

I realize this is a long winded example, but I hope it helps!

Hi,

Bought and used it for some testing and is easy to learn and looks awesome. Nice work !

However, I do not use data tables, but a real database (via TCP sockets) and an external program (in Java) to create dialogues. I never know upfront what the next “line of speech” will be (and who will say this line) as it is triggered by dozens of params and not even in UE. The only thing locally packed (in UE) will be the images as I suppose no other way around is available (correct me if I’m wrong).

Do I have to do this via the scripting as well (and have a closer look at the above mentioned links you provided), or is a (BP) struct and events for this available (should be faster, no interpretation needed) ?

Thanks for your insights !

Cheers,

Geert