Hello,
I have a problem where my macOS (Sequoia) Spritekit game spikes delta during the first press of an arrow key. I've test this with a small program, code below:
//
// GameScene.swift
import SpriteKit
import GameplayKit
class GameScene: SKScene {
var lastTime: TimeInterval = 0
override func keyDown(with event: NSEvent) {
print("---------------> delta keyDown: \(event.characters!) keyCode: \(event.keyCode)")
}
override func update(_ currentTime: TimeInterval) {
// Called before each frame is rendered
print("update begins")
let dt: CGFloat
if lastTime > 0 {
dt = (CGFloat(currentTime - lastTime))
} else {
dt = 1.0 / 60.0
}
if dt > (1/30) {
print("************************************ delta spike ", dt)
}
lastTime = currentTime
print("dt: ", dt)
print("update ends")
}
}
Example output:
update begins
************************************ delta spike 0.03381687504588626
dt: 0.03381687504588626
update ends
update begins
dt: 0.016670208307914436
update ends
As you can see, when I press left arrow key in this case I get a big delta spike. There's no spike with further presses of the arrow key.
Other keys, such as the common W A S D controls for games, do not cause this delta spike.
Topic:
Graphics & Games
SubTopic:
SpriteKit
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