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[kit] Return a (0,0) point if the radius is too big for the bounds

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Eryn Wells 2017-08-24 18:01:30 -07:00
parent bed81b2da1
commit d730c244a5
1 changed files with 3 additions and 0 deletions
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3
MetaballsKit/Metaballs.swift
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@ -178,6 +178,9 @@ public class Field {
} }
private func randomPoint(forBallWithRadius radius: Float) -> Point { private func randomPoint(forBallWithRadius radius: Float) -> Point {
guard Float(bounds.width) > radius && Float(bounds.height) > radius else {
return Point()
}
let insetBounds = bounds.insetBy(dx: CGFloat(radius), dy: CGFloat(radius)) let insetBounds = bounds.insetBy(dx: CGFloat(radius), dy: CGFloat(radius))
let x = Float(UInt32(insetBounds.minX) + arc4random_uniform(UInt32(insetBounds.width))) let x = Float(UInt32(insetBounds.minX) + arc4random_uniform(UInt32(insetBounds.width)))
let y = Float(UInt32(insetBounds.minY) + arc4random_uniform(UInt32(insetBounds.height))) let y = Float(UInt32(insetBounds.minY) + arc4random_uniform(UInt32(insetBounds.height)))