Xin chào các bạn, bài viết hôm nay mình tiếp tục chia sẻ đến các bạn source code cách tạo Particle Generator in winform C#.

C# Particle Generator in winform

Giao diện demo ứng dụng:

Video demo:

Ứng dụng sẽ tự động tạo các điểm chấm ngẫu nhiên trên màn hình.

Các bạn có thể sử dụng code này để chạy giống Screen Saver trên Window.

Source code c#:

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

namespace ParticleGenerator
{
    public partial class MainForm : Form
    {        
        private readonly Random randomNum = new Random();
        private Graphics graphics;

        public MainForm()
        {
            InitializeComponent();
            graphics = CreateGraphics();
            Size = SystemInformation.PrimaryMonitorSize;
        }

        protected override void OnSizeChanged(EventArgs e)
        {
            base.OnSizeChanged(e);
            graphics = CreateGraphics();
        }

        protected override void OnKeyDown(KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Escape)
            {
                Application.Exit();
            }
        }

        private void Render()
        {
            if (checkBoxClear.Checked)
                graphics.Clear(BackColor);

            graphics.SmoothingMode = SmoothingMode.AntiAlias;
            graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
            graphics.CompositingQuality = CompositingQuality.HighQuality;
            graphics.InterpolationMode = InterpolationMode.High;
            int xMinPos = 0, xMaxPos = 0, yMinPos = 0, yMaxPos = 0;
            SetParticleBoundarys(ref xMinPos, ref xMaxPos, ref yMinPos, ref yMaxPos);
            float particleWidth = (float)numberBoxParticleSize.Value;

            using (var brush = new SolidBrush(panelColor.BackColor))
            {
                //Generate particles according to the max/min pos, count, and particle width.
                for (int i = 0; i < numberBoxParticles.Value; i++)
                {
                    var xPos = randomNum.Next(xMinPos, xMaxPos);
                    var yPos = randomNum.Next(yMinPos, yMaxPos);
                    graphics.FillEllipse(brush, xPos, yPos, particleWidth, particleWidth);
                }
            }
        }
   
        private void SetParticleBoundarys(ref int xMinPos, ref int xMaxPos, ref int yMinPos, ref int yMaxPos)
        {
            // Apply multiplier to the width and height to get smaller bounds.
            xMaxPos = (int)(Width * numberBoxDensity.Value + 0.5m);
            yMaxPos = (int)(Height * numberBoxDensity.Value + 0.5m);

            // Get the difference between the size of the form and the new bounds.
            // Then do some wacky calculations to center the particles.
            xMinPos = ((Width - xMaxPos) / 4) + ((Width - xMaxPos) / 2);
            yMinPos = ((Height - yMaxPos) / 4) + ((Height - yMaxPos) / 2);
        }

        private void buttonClose_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void buttonSave_Click(object sender, EventArgs e)
        {
            if (BackgroundImage == null)
            {
                MessageBox.Show("Image not generated.", Application.ProductName,
                    MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }

            using (SaveFileDialog dialog = new SaveFileDialog())
            {
                dialog.Filter = "Bitmap Format|*.bmp";
                dialog.InitialDirectory =
                    Environment.GetFolderPath(Environment.SpecialFolder.MyPictures);

                if (dialog.ShowDialog() == DialogResult.OK)
                {
                    BackgroundImage.Save(dialog.FileName);
                }
            }
        }

        private void buttonColor_Click(object sender, EventArgs e)
        {
            using (ColorDialog dialog = new ColorDialog())
            {
                if (dialog.ShowDialog() == DialogResult.OK)
                {
                    panelColor.BackColor = dialog.Color;
                }
            }
        }

        private void buttonGenerate_Click(object sender, EventArgs e)
        {
            Render();
        }
    }
}

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