/**
* Calculates the trajectory of a falling particle and plots the position as a function of time.
*/
public void calculate() {
plotFrame.setAutoclear(false); // data not cleared at beginning of each calculation
// gets initial conditions
double y0 = control.getDouble("Initial y");
double v0 = control.getDouble("Initial v");
// sets initial conditions
Particle ball = new FallingParticle(y0, v0);
// gets parameters
ball.dt = control.getDouble("dt");
while (ball.y > 0) {
ball.step();
plotFrame.append(0, ball.t, ball.y);
plotFrame.append(1, ball.t, ball.analyticPosition());
}
}
