Apple's GameplayKit framework provides pathfinding, goal-based movement, rulesystems, entity-component systems, finite state machines and random distribution classes for game developers. Also included is a class and related protocols for building turn-based AIs based on minmax tree search. Available for iOS 9 and OS X 10.11.
Questions tagged [gameplay-kit]
190 questions
1
vote
1 answer
GKShuffledDistribution - using upperbound doesn't exhaust all possible values?
I'm trying to use GKShuffledDistribution in one of my apps but the nextInt(upperBound:) method doesn't work the same as the nextInt method in that it doesn't exhaust all possible values. To demonstrate, open a playground and do this:
import…
Jack Ngai
- 157
- 1
- 9
1
vote
0 answers
GameplayKit: suggestion for implementing a GKComponent to fire bullets
I am trying to use GameplayKit to implement all the entities/components of a 2D game made with SpriteKit. The first component that I have created is the SpriteComponent:
class SpriteComponent:GKComponent
{
let node:SKSpriteNode
…
Ramy Al Zuhouri
- 21,580
- 26
- 105
- 187
1
vote
1 answer
GameplayKit GKMeshGraph obstacles bug?
I feel this may be a bug can anyone reproduce or see some error in how I am doing things.
I am trying to add GKPolygonObstacle to a GKMeshGraph in a playground for iOS or macOS.
import Cocoa
import SceneKit
import GameplayKit
let points =…
Mr Flynn
- 415
- 2
- 10
1
vote
0 answers
Swift 3: Try to convert matrix_float3x3 to SCNVector3
I'm trying to make a 3D game in Swift. I want my enemy to follow a path using a GKGoal. The GKAgent3D has a rotation property type matrix_float3x3, but the SCNNode's rotation property is type SCNVector4.
How can I convert matrix_float3x3 to…
Cael
- 11
- 2
1
vote
1 answer
Generating random numbers with GKRandomSource
I am using GKRandomSource in a struct to return a random inspirational quote in the view. Is there a way to return that random number and omit the prior entry? That way the user doesn't receive the same quote twice in a row.
let inspiration = [
…
VegaStudios
- 378
- 1
- 4
- 22
1
vote
1 answer
GKScene and SKNode.entity
I've been updating a SpriteKit/GameplayKit project for Xcode 8 and the new Scene Editor which allows adding Entity-Component information to a scene. I've been to move my entity code into the scene, but I'm having trouble accessing the entity from…
Duncan Oliver
- 39
- 1
- 9
1
vote
1 answer
Choose how to split functionality between my components in an ECS
I am currently building a game and I want to use Gameplaykit to organise the elements.
I discovered the concept of ECS (Entity Component System) that enables to put functionality in small blocks (called components) that can than be added to an…
Pop Flamingo
- 3,023
- 2
- 26
- 64
1
vote
1 answer
Obstacles With GameplayKit
Here is my question:
How can I convert an SKSpriteNodearray into an array of GKObstacles so that an agent can appropriately avoid these obstacles by using the goalToAvoidObstacles:(nonnull NSArray *)…
Will Von Ullrich
- 2,129
- 2
- 15
- 42
1
vote
2 answers
GameplayKit Not Pausing When Scene Is Paused
I have a GKAgent2D governing the movement of an SKNode enemy that moves towards a destination.
When I pause the SKScene that the agent is moving in, the enemy node seems to continue to move without showing such movement. All of the visible movements…
Will Von Ullrich
- 2,129
- 2
- 15
- 42
1
vote
0 answers
GameplayKit Delegate Methods Not Getting Called
I have currently a large SpriteKit game in development that uses many different characters and enemies in the game - all of which runs quite nicely as planned.
As the levels and gameplay has become more involved however, I am looking to utilize…
Will Von Ullrich
- 2,129
- 2
- 15
- 42
1
vote
1 answer
Finding a path on a grid with GameplayKit
I am experimenting with Apple's GameplayKit, SpriteKit and Swift. I am trying to wrap my head around pathfinding through tiles which are passable from only one side.
The diagram below shows two problems:
On the left is a simple solution, I…
Garry Pettet
- 8,096
- 22
- 65
- 103
1
vote
1 answer
Random Number generation with GameplayKit
I was learning random number generation with swift and Gameplaykit. In the following code, are the numbers generated when I initialize the randomDist and it simply gives a sample from the already generated numbers when I call nextInt or is the…
philoniare
- 1,625
- 1
- 13
- 20
1
vote
1 answer
GKComponentSystem has no components on update cycle
I’m playing around with SpriteKit and GameplayKit. But when I run my code, the sprite I’m expecting to wander around, does nothing.
I used lldb to print out some values, this is the print out:
(lldb) po agentSystem.components
▿ 1 elements
- [0] :…
Adam Carter
- 4,741
- 5
- 42
- 103
1
vote
1 answer
How do you determine the order of evaluation of GKRules in a GKRuleSystem?
I'm exploring Apple's GameplayKit APIs and I am currently very confused by the way that GKRuleSystem evaluates its rules. The documentation says that the salience property determines the order of evaluation, with higher-salience rules being…
Uzziel
- 300
- 2
- 6
1
vote
2 answers
GameplayKit -[GKGraph dealloc]: crash on iOS9.2
I wrote a game called "Spiral" with Swift and GameplayKit.But when my GKGridGraph instance dealloc, the app always crash.This happens only on iOS9.2. I have test my code on iOS9.0, everything was all right. Here is the crash calling stack:
#0 …
YangXiaoyu
- 775
- 4
- 10