SpriteKit粒子＆＃x2014;当场景加载时，如何设置状态已经跌倒？

发布于 2025-02-09 04:30:35 字数 660 浏览 0 评论 0 原文

我正在使用SpriteKit粒子发射器节点作为雪：

let snowEmitterNode = SKEmitterNode(fileNamed: "Snow.sks")
guard let snowEmitterNode = snowEmitterNode else { return }
snowEmitterNode.particleSize = CGSize(width: 4, height: 4)
snowEmitterNode.particleLifetime = 10
snowEmitterNode.particleBirthRate = 10
snowEmitterNode.xAcceleration = -gameSpeed
snowEmitterNode.particleLifetimeRange = 10
snowEmitterNode.position = CGPoint(x: (self.size.width/2), y: 800)
snowEmitterNode.zPosition = 80
addChild(snowEmitterNode)

它看起来很棒，但是只有一旦场景加载，它才会开始，这意味着一开始就没有雪，然后一切突然开始掉落，这显然看起来很假。是否有可能以某种方式设置已经部分落在场景负载上以避免这种状态的状态？

原文

I'm using SpriteKit particle emitter nodes for snow:

let snowEmitterNode = SKEmitterNode(fileNamed: "Snow.sks")
guard let snowEmitterNode = snowEmitterNode else { return }
snowEmitterNode.particleSize = CGSize(width: 4, height: 4)
snowEmitterNode.particleLifetime = 10
snowEmitterNode.particleBirthRate = 10
snowEmitterNode.xAcceleration = -gameSpeed
snowEmitterNode.particleLifetimeRange = 10
snowEmitterNode.position = CGPoint(x: (self.size.width/2), y: 800)
snowEmitterNode.zPosition = 80
addChild(snowEmitterNode)

It looks great, but it only begins once the scene loads, which means there is no snow at the start, and then it all suddenly starts to fall, which obviously looks very fake. Is it possible to somehow set the state of it to have already fallen partly on scene load to avoid this?

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