A serie of small lines; step-by-step; model-driven

public class Aorta extends java.applet.Applet
{
    double t,dt,i,j,Plv,PlvMax,f,Qao,Pao,Vao,Qp,Rp,Cao;
    int iy=0,ix=0,n=0,youd,xoud;
	
public void paint(Graphics g)
 {
       youd = iy;
       xoud = ix;
       t = 0.0;
       dt = 0.02;  
       Plv = 0.0;
       PlvMax = 120.0;
       f = 1.0;
       Qao = 80.0;
       Pao = 80.0;
       Vao = 80.0;
       Qp = 70.0;
       Rp = 1.25;
       Cao = 1.1;

       i = 50.0 * t + 0.0;  
       j = -1.0 * Pao + 200.0;
	
       for ( n=0; n < size().width; n=n+1 )
	   {
		t = t + dt;
		Plv = PlvMax * Math.sin (2.0 * 3.14 * f * t); 
		if (Plv < 0.0)  Plv = 0.0; 
		Qao = 33.0 * (Plv - Pao);
		if ((Plv-Pao) < 0.0)  Qao = 0.0; 
		Vao = Vao + (Qao - Qp) * dt;
		Qp = Pao / Rp;
		Pao = Vao / Cao;
		if ( t > 2.0 ) { Cao = 0.50; } // <--- a hiden case

		i = 50.0 * t + 0.0;  
		j = -1.0 * Pao + 200.0;

		iy = (int) j; // <-- the transformation of the coordinates 
		ix = (int) i;
			
		System.out.println("tijd, Pao, iy: "+t+", "+Pao+", "+iy);
		g.drawLine (xoud, youd, ix, iy);
		xoud = ix;
		youd = iy;
	   }
 }
}

You see graphical output are drawing. See the model (of Aorta) in the html-source-code.

Enschede, 1996; updated March, 2003.