130 lines
3.3 KiB
Swift
130 lines
3.3 KiB
Swift
//
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// MetaballsSaverView.swift
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// Metaballs
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//
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// Created by Eryn Wells on 8/16/17.
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// Copyright © 2017 Eryn Wells. All rights reserved.
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//
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import Foundation
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import MetalKit
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import ScreenSaver
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@objc public class MetaballsSaverView: ScreenSaverView, RendererDelegate {
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private static func defaultParameters() -> Parameters {
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var p = Parameters()
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let defaults = UserDefaults.standard
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let style = defaults.colorStyle ?? .gradient2
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p.colorStyle = style
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let color0 = defaults.color0 ?? Float4(0.50, 0.79, 1, 1)
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p.color0 = color0
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let color1 = defaults.color1 ?? Float4(0.88, 0.50, 1, 1)
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p.color1 = color1
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return p
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}
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public var metalView: MTKView
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public var field: Field {
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didSet {
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field.size = Size(size: metalView.drawableSize)
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}
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}
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internal var renderer: Renderer
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override public init?(frame: NSRect, isPreview: Bool) {
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let params = MetaballsSaverView.defaultParameters()
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field = Field(parameters: params)
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field.size = Size(size: frame.size)
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metalView = MetalView()
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metalView.isPaused = true // Don't use the Metal View's internal timer.
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metalView.translatesAutoresizingMaskIntoConstraints = false
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renderer = Renderer()
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metalView.delegate = renderer
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super.init(frame: frame, isPreview: isPreview)
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addSubview(metalView)
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NSLayoutConstraint.activate([
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metalView.topAnchor.constraint(equalTo: topAnchor),
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metalView.leftAnchor.constraint(equalTo: leftAnchor),
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metalView.bottomAnchor.constraint(equalTo: bottomAnchor),
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metalView.rightAnchor.constraint(equalTo: rightAnchor),
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])
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renderer.delegate = self
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animationTimeInterval = 1 / 30.0
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metalView.preferredFramesPerSecond = 30
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}
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required public init?(coder: NSCoder) {
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fatalError("initWithCoder: not implemented")
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}
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override public func startAnimation() {
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for _ in 1...10 {
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addBallWithRandomRadius()
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}
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super.startAnimation()
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}
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override public func stopAnimation() {
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super.stopAnimation()
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}
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override public func animateOneFrame() {
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metalView.draw()
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}
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override public func draw(_ rect: NSRect) {
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metalView.draw()
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}
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override public var hasConfigureSheet: Bool {
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return true
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}
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override public var configureSheet: NSWindow? {
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let prefs = PreferencesViewController()
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prefs.showsCloseButton = true
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let window = NSWindow(contentViewController: prefs)
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return window
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}
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// MARK: - NSView
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override public func setFrameSize(_ newSize: NSSize) {
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super.setFrameSize(newSize)
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NSLog("Resizing: \(newSize)")
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}
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// MARK: - Private
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private func addBallWithRandomRadius() {
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let base = UInt32(bounds.width * 0.05)
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let variance = UInt32(base * 2)
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let r = Float(base + arc4random_uniform(variance))
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field.add(ballWithRadius: r)
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}
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// MARK: - RendererDelegate
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public var renderSize: Size {
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get {
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return field.size
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}
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set {
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field.size = newValue
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}
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}
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}
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class MetalView: MTKView {
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override var isOpaque: Bool {
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return true
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}
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}
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