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https://github.com/Leonmmcoset/CMLeonOS.git
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122 lines
3.7 KiB
C#
122 lines
3.7 KiB
C#
// The CMLeonOS Project (https://github.com/Leonmmcoset/CMLeonOS)
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// Copyright (C) 2025-present LeonOS 2 Developer Team
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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using CMLeonOS;
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using CMLeonOS.Gui.UILib;
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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namespace CMLeonOS.Gui.Apps.Demos
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{
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internal class Starfield : Process
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{
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internal Starfield() : base("Starfield", ProcessType.Application) { }
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AppWindow window;
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WindowManager wm = ProcessManager.GetProcess<WindowManager>();
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private readonly Random random = new Random();
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private readonly List<Star> stars = new List<Star>();
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private int timerId;
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private class Star
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{
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internal double X { get; set; }
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internal double Y { get; set; }
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internal double Z { get; set; }
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internal double Velocity { get; set; }
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internal Star(double x, double y, double z, double velocity)
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{
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X = x;
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Y = y;
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Z = z;
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Velocity = velocity;
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}
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}
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internal (double, double) TransformCoordinates(double x, double y, double z, double fov)
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{
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double screenX = x / (z * Math.Tan(fov / 2)) + 0.5;
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double screenY = y / (z * Math.Tan(fov / 2)) + 0.5;
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return (screenX, screenY);
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}
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public override void Start()
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{
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base.Start();
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window = new AppWindow(this, 256, 256, 256, 256);
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wm.AddWindow(window);
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window.Title = "Starfield";
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window.CanResize = true;
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window.Closing = TryStop;
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for (int i = 0; i < 100; i++)
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{
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stars.Add(new Star(
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x: random.NextDouble() * 2 - 1.5,
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y: random.NextDouble() * 2 - 1.5,
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z: 3,
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velocity: random.NextDouble() * 0.05 + 0.05));
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}
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timerId = Cosmos.HAL.Global.PIT.RegisterTimer(new Cosmos.HAL.PIT.PITTimer(() =>
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{
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foreach (var star in stars)
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{
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star.Z -= star.Velocity;
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if (star.Z < 0)
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{
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star.X = random.NextDouble() * 2 - 1.5;
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star.Y = random.NextDouble() * 2 - 1.5;
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star.Z = 3;
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}
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}
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}, (ulong)((1000 /* ms */ / 30) * 1e+6 /* ms -> ns */ ), true));
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}
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public override void Run()
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{
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window.Clear(Color.Black);
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foreach (var star in stars)
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{
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(double X, double Y) pos = TransformCoordinates(star.X, star.Y, star.Z, Math.PI / 2);
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int screenX = (int)((pos.X + 1) * (window.Width / 2));
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int screenY = (int)((pos.Y + 1) * (window.Height / 2));
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window.DrawPoint(screenX, screenY, Color.White);
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}
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wm.Update(window);
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}
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public override void Stop()
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{
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base.Stop();
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Cosmos.HAL.Global.PIT.UnregisterTimer(timerId);
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}
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}
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}
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