Behaviour Trees

Question 1

Behaviour Trees, when comparing to Hierarchical State Machines, use ___ instead of states

Answer 1

tasks

Question 2

The Task Types of Behaviour Trees are ___

Answer 2

Conditions
Actions
and Composites

Question 3

The Conditions task type is used to ___

Answer 3

test some property of the game

Question 4

The Actions task type is used to ___

Answer 4

alter the state of the game

Question 5

The Composites task type is used to ___

Answer 5

combine subtasks

Question 6

Regarding the Selector Composite, it is used to ___

If all ___ fail, the selector ___

Answer 6

Choose the first successfull action of a set of actions
Actions
Fails

Question 7

Behaviour Trees can use ___ for information sharing

Answer 7

blackboards

Question 8

Regarding the Sequence Composite, it is used to ___
If any ___ fails, the whole sequence ___
If all steps are successfull, ___

Answer 8

Represent a series of tasks that need to be runned in a sequence
Task
Fails
The sequence is sucessfull

Question 9

The non-deterministic version of the Sequence runs its children in a ___

Answer 9

random order

Question 10

Regarding the Decorator Composite some examples are ___ and ___

Answer 10

Filters

Inverters

Question 11

The Smaphore Guard Decorator is used to control access to ___

Answer 11

limited resources

Question 12

The Parallel Composite is similar to the ___ Composite but instead runs all child tasks ___
It succeeds if ___
it fails if ___

Answer 12

Sequence
simultaneously
all childs succeed
any child fail

Question 13

Parallel Composite with Selector Policy success is defined as soon as ___

Answer 13

the first child succeeds

Question 14

Parallel Composite can control the behaviour of ___

Answer 14

a group of characters

Question 15

Interruptor Decorator is used when we need ___ that affect another ___ directly

Answer 15

behaviours

behaviour

Question 16

We use Hierarchical Blackboards when we need to associate blackboards with ___

Answer 16

specific subtrees

Question 17

When we are searching for a value on Hierarchical Blackboards we start searching in the ___ blackboard
If not there, ___ search in the ___ blackboard

Answer 17

closest
recursively
parent

Question 18

Some Behaviour Tree Advantages are:
1- ___ control of behaviour
2- Can be easily used to integrate ___ behaviour with ___ behaviour
3- Behaviour can be create by non-programmers using ___

Answer 18

1- Fine tuned
2- low-level / high-level
3- graphical editors

Question 19

Some Behaviour Tree Disadvantages are:
1- ___ to represent State Machine ___
2- Requires ___ mechanisms provided by the language/game engine
3- Structure of the behaviour tree is not ___

Answer 19

1- Hard / behaviour
2- thread-safe
3- dynamic

Question 20

STUDY SLIDE 7

Answer 20

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