*Amplitude and Frequency (Wave Modulation) *
(https://www.youtube.com/watch?v=H0KBVZBsI7A&feature=youtu.be)
Code :
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Wave_Modulation_Amplitude_and_Frequency
{
public partial class Form1 : Form
{
private Timer timer1;
private Button buttonStart;
private Button buttonPause;
private Ball ball;
private const float ballSize = 9;
private double time;
private bool isPaused = false;
private TrackBar HSlider_Amp;
private TrackBar HSlider_Freq;
private Label labelAmp;
private Label labelFreq;
private TextBox textBoxAmp;
private TextBox textBoxFreq;
private float amplitude = 50f; // Default amplitude
private float frequency = 1f; // Default frequency in Hz
public Form1()
{
InitializeComponent();
InitializeButton();
InitializeSlidersAndControls();
this.Width = 1300;
this.Height = 700;
this.Text = "Amplitude and Frequency (Wave Modulation)";
this.BackColor = Color.Black;
this.CenterToScreen();
timer1 = new Timer
{
Enabled = false,
Interval = 20 // Update every 20ms
};
timer1.Tick += Timer1_Tick;
this.Paint += Form1_Paint;
ball = new Ball(Color.Red, 0, false); // Red ball follows a sine wave
}
private void InitializeButton()
{
buttonStart = new Button
{
Text = "Start",
AutoSize = true,
Location = new Point(1070, 60),
ForeColor = Color.Red,
BackColor = Color.Yellow,
Font = new Font("Microsoft Sans Serif", 16, FontStyle.Bold)
};
buttonStart.Click += new EventHandler(ButtonStart_Click);
Controls.Add(buttonStart);
buttonPause = new Button
{
Text = "Pause",
AutoSize = true,
Location = new Point(1150, 60),
ForeColor = Color.Red,
BackColor = Color.Yellow,
Font = new Font("Microsoft Sans Serif", 16, FontStyle.Bold)
};
buttonPause.Click += new EventHandler(ButtonPause_Click);
Controls.Add(buttonPause);
}
private void ButtonPause_Click(object sender, EventArgs e)
{
if (isPaused)
{
// Resume the timer
timer1.Start();
buttonPause.Text = "Pause"; // Update button text to show current state
isPaused = false;
}
else
{
// Pause the timer
timer1.Stop();
buttonPause.Text = "Resume"; // Update button text to show current state
isPaused = true;
}
}
private void InitializeSlidersAndControls()
{
int sliderWidth = (int)(this.ClientSize.Width * 0.4); // 40% of form width
// Amplitude Slider
HSlider_Amp = new TrackBar
{
Orientation = Orientation.Horizontal,
Minimum = 10,
Maximum = 200,
Value = (int)amplitude,
TickFrequency = 10,
Location = new Point(190, 10),
Width = 500
};
HSlider_Amp.Scroll += (s, e) =>
{
amplitude = HSlider_Amp.Value;
textBoxAmp.Text = amplitude.ToString();
};
Controls.Add(HSlider_Amp);
// Frequency Slider
HSlider_Freq = new TrackBar
{
Orientation = Orientation.Horizontal,
Minimum = 0,
Maximum = 1000,
Value = (int)(frequency * 100), // scale frequency for slider
TickFrequency = 100,
Location = new Point(750, 10),
Width = 500
};
HSlider_Freq.Scroll += (s, e) =>
{
frequency = HSlider_Freq.Value;
textBoxFreq.Text = frequency.ToString();
};
Controls.Add(HSlider_Freq);
// Amplitude Label
labelAmp = new Label
{
Text = "Amplitude (10 - 200 volts): ",
AutoSize = true,
ForeColor = Color.White,
BackColor = Color.Black,
Location = new Point(200, 60),
Font = new Font("Microsoft Sans Serif", 13, FontStyle.Bold)
};
Controls.Add(labelAmp);
// Frequency Label
labelFreq = new Label
{
Text = "Frequency (0 - 1000 Hz):",
AutoSize = true,
ForeColor = Color.White,
BackColor = Color.Black,
Location = new Point(760, 60),
Font = new Font("Microsoft Sans Serif", 13, FontStyle.Bold)
};
Controls.Add(labelFreq);
// Amplitude TextBox
textBoxAmp = new TextBox
{
Text = amplitude.ToString(),
ForeColor = Color.White,
BackColor = Color.Black,
Location = new Point(455, 60),
Width = 50,
Font = new Font("Microsoft Sans Serif", 13, FontStyle.Bold),
ReadOnly = true
};
Controls.Add(textBoxAmp);
// Frequency TextBox
textBoxFreq = new TextBox
{
Text = frequency.ToString(),
ForeColor = Color.White,
BackColor = Color.Black,
Location = new Point(1000, 60),
Width = 60,
Font = new Font("Microsoft Sans Serif", 13, FontStyle.Bold),
ReadOnly = true
};
Controls.Add(textBoxFreq);
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
// Calculate the middle points
int midY = this.ClientSize.Height / 2;
int midX = 50; // Left margin for Y-axis
// Draw X-Axis (Frequency)
e.Graphics.DrawLine(Pens.White, 0, midY, this.ClientSize.Width, midY);
e.Graphics.DrawString("Frequency", new Font("Microsoft Sans Serif", 12, FontStyle.Bold), Brushes.White, this.ClientSize.Width - 100, midY + 10);
// Draw Y-Axis (Amplitude)
e.Graphics.DrawLine(Pens.White, midX, 0, midX, this.ClientSize.Height);
e.Graphics.DrawString("Amplitude", new Font("Microsoft Sans Serif", 10, FontStyle.Bold), Brushes.White, midX + 5, 10);
// Draw the red ball and its trajectory
if (ball.Trajectory.Count >= 2)
{
using (Pen trajectoryPen = new Pen(ball.Color, 2f))
{
e.Graphics.DrawLines(trajectoryPen, ball.Trajectory.ToArray());
}
}
// Draw the ball
e.Graphics.FillEllipse(new SolidBrush(ball.Color), ball.Position.X, ball.Position.Y, ballSize, ballSize);
}
private void Timer1_Tick(object sender, EventArgs e)
{
time += 0.02; // Time increment
ball.UpdatePosition(time, this.ClientSize.Height / 2, ballSize, amplitude, frequency);
this.Invalidate(); // Trigger repaint
}
private void ButtonStart_Click(object sender, EventArgs e)
{
ball.Reset(this.ClientSize.Height / 2 - ballSize / 2);
timer1.Start(); // Start the timer
}
}
public class Ball
{
public Color Color { get; }
public PointF Position { get; private set; }
public List<PointF> Trajectory { get; }
private float phaseShift;
private bool isStraight;
public Ball(Color color, float phaseShift, bool isStraight)
{
Color = color;
this.phaseShift = phaseShift;
this.isStraight = isStraight;
Trajectory = new List<PointF>();
}
public void UpdatePosition(double time, float midY, float ballSize, float amplitude, float frequency)
{
float speed = 5f;
Position = new PointF(
Position.X + speed,
midY + (float)(amplitude * Math.Sin(2 * Math.PI * frequency * time + phaseShift))
);
Trajectory.Add(new PointF(Position.X, Position.Y));
if (Position.X > 1300)
{
Position = new PointF(0, midY); // Reset to start position
Trajectory.Clear(); // Clear the trajectory points
}
}
public void Reset(float initialY)
{
Position = new PointF(0, initialY);
Trajectory.Clear();
}
}
}
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