static void Main()
{
// Create a SpringODE object that represents
// a 1.0 kg spring with a spring constant of
// 20 N/m and a damping coefficient of 1.5 N-s/m
double mass = 1.0;
double mu = 1.5;
double k = 20.0;
double x0 = -0.2;
SpringODE ode = new SpringODE(mass, mu, k, x0);
// Solve the ODE over a range of 7 seconds
// using a 0.1 second time increment.
double dt = 0.1;
Console.WriteLine("t x v");
Console.WriteLine("" + ode.GetTime() + " " + (float)ode.GetX() +
" " + (float)ode.GetVx());
while (ode.GetTime() <= 7.0)
{
ode.UpdatePositionAndVelocity(dt);
Console.WriteLine("" + ode.GetTime() + " " + (float)ode.GetX() +
" " + (float)ode.GetVx());
}
return;
}
// Event handling method for the "Start" button
public void StartButtonClicked(object source, EventArgs e)
{
// Get the initial values from the textfield
double mass = Convert.ToDouble(massTextBox.Text);
double mu = Convert.ToDouble(muTextBox.Text);
double k = Convert.ToDouble(kTextBox.Text);
double x0 = Convert.ToDouble(x0TextBox.Text);
// Create a SpringODE object
spring = new SpringODE(mass, mu, k, x0);
// Start the box sliding using a Timer object
// to slow down the action.
gameTimer.Start();
}
public SpringSimulator()
{
// Create a SpringODE object with default values so
// the display can be updated the first time.
spring = new SpringODE(1.0, 0.5, 20.0, 0.4);
// Create a Timer object that will be used
// to slow the action down.
gameTimer = new Timer();
gameTimer.Interval = 50; // delay in milliseconds.
gameTimer.Tick += new EventHandler(ActionPerformed);
// Create some Labels
massLabel = new Label();
massLabel.Text = "End mass, kg";
massLabel.Font = new Font(massLabel.Font, FontStyle.Bold);
massLabel.Top = 50;
massLabel.Left = 10;
massLabel.Width = 100;
muLabel = new Label();
muLabel.Text = "Damping coefficient, kg/s";
muLabel.Font = new Font(muLabel.Font, FontStyle.Bold);
muLabel.Top = 80;
muLabel.Left = 10;
muLabel.Width = 130;
kLabel = new Label();
kLabel.Text = "Spring constant, N/m";
kLabel.Font = new Font(kLabel.Font, FontStyle.Bold);
kLabel.Top = 110;
kLabel.Left = 10;
kLabel.Width = 120;
x0Label = new Label();
x0Label.Text = "Initial location, m";
x0Label.Font = new Font(x0Label.Font, FontStyle.Bold);
x0Label.Top = 140;
x0Label.Left = 10;
x0Label.Width = 120;
// Create TextBox objects to display the outcome.
massTextBox = new TextBox();
massTextBox.Width = 50;
massTextBox.Text = "1.0";
massTextBox.AutoSize = true;
massTextBox.Top = massLabel.Top;
massTextBox.Left = 150;
muTextBox = new TextBox();
muTextBox.Width = 50;
muTextBox.Text = "0.5";
muTextBox.AutoSize = true;
muTextBox.Top = muLabel.Top;
muTextBox.Left = 150;
kTextBox = new TextBox();
kTextBox.Width = 50;
kTextBox.Text = "20.0";
kTextBox.AutoSize = true;
kTextBox.Top = kLabel.Top;
kTextBox.Left = 150;
x0TextBox = new TextBox();
x0TextBox.Width = 50;
x0TextBox.Text = "0.4";
x0TextBox.AutoSize = true;
x0TextBox.Top = x0Label.Top;
x0TextBox.Left = 150;
// Create Button objects
int buttonHeight = 30;
int buttonWidth = 50;
int buttonLeft = 20;
startButton = new Button();
startButton.Text = "Start";
startButton.Height = buttonHeight;
startButton.Width = buttonWidth;
startButton.Top = 200;
startButton.Left = buttonLeft;
startButton.Click += new EventHandler(StartButtonClicked);
resetButton = new Button();
resetButton.Text = "Reset";
resetButton.Height = buttonHeight;
resetButton.Width = buttonWidth;
resetButton.Top = 250;
resetButton.Left = buttonLeft;
resetButton.Click += new EventHandler(ResetButtonClicked);
// Create a drawing panel.
drawingPanel = new Panel();
drawingPanel.Width = 151;
drawingPanel.Height = 301;
drawingPanel.Left = 230;
drawingPanel.Top = 50;
drawingPanel.BorderStyle = BorderStyle.FixedSingle;
// Add the GUI components to the Form
this.Controls.Add(massLabel);
this.Controls.Add(muLabel);
this.Controls.Add(kLabel);
this.Controls.Add(x0Label);
this.Controls.Add(massTextBox);
this.Controls.Add(muTextBox);
this.Controls.Add(kTextBox);
this.Controls.Add(x0TextBox);
this.Controls.Add(startButton);
this.Controls.Add(resetButton);
this.Controls.Add(drawingPanel);
// Set the size and title of the form
this.Height = 450;
this.Width = 400;
this.Text = "Spring Simulator";
// Center the form on the screen and make
// it visible.
this.StartPosition = FormStartPosition.CenterScreen;
this.Visible = true;
// Update the GUI display
UpdateDisplay();
}
