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[Metaballs] Randomly position and give velocity to balls when they are added

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Add 10 balls to the field on start!
This commit is contained in:
Eryn Wells 2017-08-06 07:48:26 -07:00
parent 8dcd0910f1
commit 79236d805b
2 changed files with 15 additions and 6 deletions
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16
MetaballsKit/Metaballs.swift
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@ -87,15 +87,21 @@ public class Field {
}
}
}
populateBallBuffer()
}
public func add(ballWithRadius radius: Float) {
let insetBounds = bounds.insetBy(dx: CGFloat(radius), dy: CGFloat(radius))
// let x = CGFloat(UInt32(insetBounds.minX) + arc4random_uniform(UInt32(insetBounds.width)))
// let y = CGFloat(UInt32(insetBounds.minY) + arc4random_uniform(UInt32(insetBounds.height)))
let position = Point(x: Float(insetBounds.midX), y: Float(insetBounds.midY))
// TODO: Randomly generate velocity too.
let ball = Ball(radius: radius, position: position, velocity: Vector())
let x = Float(UInt32(insetBounds.minX) + arc4random_uniform(UInt32(insetBounds.width)))
let y = Float(UInt32(insetBounds.minY) + arc4random_uniform(UInt32(insetBounds.height)))
let position = Point(x: x, y: y)
let dx = Float(5 - Int(arc4random_uniform(10)))
let dy = Float(5 - Int(arc4random_uniform(10)))
let velocity = Vector(dx: dx, dy: dy)
let ball = Ball(radius: radius, position: position, velocity: velocity)
balls.append(ball)
NSLog("Added ball \(ball); fieldSize=\(size)")