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

Add 10 balls to the field on start!
2017-08-06 07:48:26 -07:00 · 2017-08-06 07:48:26 -07:00 · 79236d805b
commit 79236d805b
parent 8dcd0910f1
2 changed files with 15 additions and 6 deletions
--- a/Metaballs/ViewController.swift
+++ b/Metaballs/ViewController.swift
@ -40,7 +40,10 @@ class ViewController: NSViewController, RendererDelegate {
    override func viewWillAppear() {
        super.viewWillAppear()
        renderer.mtkView(metalView, drawableSizeWillChange: metalView.drawableSize)
-        field.add(ballWithRadius: 10.0)
+        for _ in 1...10 {
+            let r = Float(20 + arc4random_uniform(50))
+            field.add(ballWithRadius: r)
+        }
    }

    private func newErrorView() -> NSView {