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53 lines
1.6 KiB
Swift
53 lines
1.6 KiB
Swift
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//
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// MachineDocument.swift
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// Clock Signal
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//
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// Created by Thomas Harte on 04/01/2016.
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// Copyright © 2016 Thomas Harte. All rights reserved.
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//
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import Cocoa
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class MachineDocument: NSDocument, CSCathodeRayViewDelegate, CSCathodeRayViewResponderDelegate {
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@IBOutlet weak var openGLView: CSCathodeRayView! {
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didSet {
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openGLView.delegate = self
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openGLView.responderDelegate = self
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}
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}
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override func windowControllerDidLoadNib(aController: NSWindowController) {
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super.windowControllerDidLoadNib(aController)
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// bind the content aspect ratio to remain 4:3 from now on
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aController.window?.contentAspectRatio = NSSize(width: 4.0, height: 3.0)
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}
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var intendedCyclesPerSecond: Int64 = 0
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private var lastCycleCount: Int64?
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final func openGLView(view: CSCathodeRayView, didUpdateToTime time: CVTimeStamp) {
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// TODO: treat time as a delta from old time, work out how many cycles that is plus error
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// this slightly elaborate dance is to avoid overflow
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let videoTimeScale64 = Int64(time.videoTimeScale)
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let cycleCountLow = ((time.videoTime % videoTimeScale64) * intendedCyclesPerSecond) / videoTimeScale64
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let cycleCountHigh = (time.videoTime / videoTimeScale64) * intendedCyclesPerSecond
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let cycleCount = cycleCountLow + cycleCountHigh
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if let lastCycleCount = lastCycleCount {
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let elapsedTime = cycleCount - lastCycleCount
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runForNumberOfCycles(Int32(elapsedTime))
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}
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lastCycleCount = cycleCount
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}
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func runForNumberOfCycles(numberOfCycles: Int32) {}
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// MARK: CSOpenGLViewResponderDelegate
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func keyDown(event: NSEvent) {}
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func keyUp(event: NSEvent) {}
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func flagsChanged(newModifiers: NSEvent) {}
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}
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