Spieldesign - AI

Basic blocks - AI actions

• Acquire (target, number = 1, allowStealing = false, allowPickpocketing = false, allowKilling = false)
• Activate (target, number = 1)
• Eat (foodType, createFakeFood = false, gainChemicals = true)
• Escort (target, number = 1, destination, waitDistance, minDistance, maxDistance, rideHorse = false, preferPaths = true, runIfBehindDistance)
• FleeFrom (from, avoidNodeRadius, distance, rideHorse = false, ignoreDeadThreats = true, quiet = true, countAsIsFleeing = true)
• FleeTo (to, goalRadius, rideHorse = false, quiet = true, countAsIsFleeing = true)
• Fly (location, height)
• Follow (target, minRadius, maxRadius, useLeadersGoal = false, rideHorse = false, needLOS = false)
• FollowTo (target, endLocation, minRadius, maxRadius, useLeadersGoal = false, rideHorse = false, needLOS = false)
• ForceGreet (topic, waitLocation, triggerLocation)
• Guard (restrictedArea, suspiciousOf, warnRadius, attackRadius)
• HoldPosition (location)
• KeepAnEyeOn (target, observationArea, endPursuitArea)
• LockDoors (location, warnBeforeLocking)
• Orbit (location, innerRadius, outerRadius, height)
• Patrol (pathStart, pointRadius, repeatable, startAtNearestPoint, rideHorse = false)
• Say (topic, target, lookAtTarget)
• Sit (target)
• Sleep (target)
• Travel (destination, rideHorse = false)
• UnlockDoors (location)
• UseIdleMarker (target)
• UseMagic (location, spell, holdWhenBlocked, castTimeMin, castTimeMax, cooldownTimeMin, cooldownTimeMax)
• UseWeapon (location, weapon, target, alwaysHit, repeat = false, crouchToReload, doNoDamage, holdWhenBlocked, allowCombatStart, alwaysPowerAttack)
• AimWeapon (location, weapon, target, holdWhenBlocked)
• UseWeaponVolley (location, weapon, target, alwaysHit, repeat = false, crouchToReload, doNoDamage, holdWhenBlocked, allowCombatStart, alwaysPowerAttack, volleyWaitMin, volleyWaitMax, volleyShotsMin, volleyShotsMax)
• Wait (duration, stomMovement = false)
• Wander (location, preferPaths = true, rideHorse = false, minDistance)
• Sandbox (location, preferPaths = true, minDistance, energy, allowEating, allowSleeping, allowConversation, allowIdleMarkers, allowFurniture, allowSitting, allowWandering, allowWorkbenches)
• UseSkill (location, skill, holdWhenBlocked, useMaterials)

AI functions (return a value)

• Find (location, targetSelection, searchOwnInventory = true, randomizeList = true) -> objectList

AI utility stuff

• Succeed ()
• Fail ()
• PushToStack (variable)
• PopFromStack () -> value
• SetVariable (variable, value)

Action trees - composite and decorator nodes:

• Random (Pick one child node and finish when it finishes. Return value is the child node's return value.)
• Sequence (Go through child nodes in sequence and execute them, until you finish or one node fails. Return the last executed node's return value)
• Selector (Go through child nodes in sequence and execute them, until the first succeeds. Return success unless no child nodes succeeded)
• ParallelAny (Run all child nodes at once. Return when the last one finishes. Return success unless no child nodes succeeded)
• ParallelAll (Like ParallelAny, but return failure if any child node failed)
• RandomSequence (like Sequence, but in random order)
• RandomSelector (like Selector, but in random order)
• StaticPriorityList (Evaluate the child node list's priorities and execute the valid one with the highest priority. Return its return value)
• DynamicPriorityList (Like StaticPriorityList, but re-evaluate the priorities at every step and terminate child nodes which lost their highest priority status)
• Invert (run the child node, invert its result)
• Interrupter (Runs the child node, but can be signalled to interrupt it at any step)
• Limit (Only runs the child node a maximum amount of times, returning failure all subsequent times)
• Repeat (Repeats the child node forever)
• UntilFail (Repeats the child node until it returns failure, then returns success)
• Succeeder (Runs the child node, then returns success)

TODO: Parallel Immediate/Delayed stuff?

See also: https://docs.unrealengine.com/latest/INT/Engine/AI/BehaviorTrees/NodeReference/Decorators/index.html