Example with a slider and model-driven graphical output

<SCRIPT>
function infoFromJava_Slider(sliderNaam,waarde)
{
 document.A8.veld1.value=waarde;
}

function  setModel(form)
{
t = 0.0;  
dt =  1.0;
Tmin = 0.0;
Tmax = 1000.0;

x = 100;   //start values and parameter values
y = 5000;
p = 1.0;

document.slider1.setPMax(1.5); //input object.
document.slider1.setPMin(0.0);
document.slider1.setPStart(1.0);
document.slider1.setDigits(4);
p = document.A8.veld1.value;

document.grafiekAB.setYmaxb("200"); //output object.
document.grafiekAB.setYminb("0");
document.grafiekAB.setYmaxo("6000");
document.grafiekAB.setYmino("4000");

aantalpunten=Math.round(Tmax/dt);   //aantal punten 1000/10=100!!
document.grafiekAB.setPunten(aantalpunten);
}

function  runModel(form)
{
var string1="";

iii = document.A8.veld1.value;
p = parseFloat(iii);

  for (var i=0; i<aantalpunten; i++)
  {
  t = t + dt;
  dxdt = 0.1*p;
  dydt = -0.2;
  x = x + dxdt*dt;
  y = y + dydt*dt;

  ix = Math.round (x);  
  iy = Math.round (y);
  document.grafiekAB.setUpper(string1 + ix );
  document.grafiekAB.setLower(string1 + iy );
  }
}
</SCRIPT>


<FORM NAME="A8">

<P> 
<applet
    code=slider.class
    name=slider1
    width=200
    height=16 MAYSCRIPT>
</applet>  

<INPUT TYPE="text" NAME="veld1" VALUE="aaa" SIZE="10">

<P>
<APPLET
CODE=grafiek.class
NAME=grafiekAB
WIDTH=300
HEIGHT=300>
</APPLET>

<INPUT TYPE="button" VALUE="Reset" ONCLICK="setModel(this.form)">
<INPUT TYPE="button" VALUE="Run" ONCLICK="runModel(this.form)"> 

</FORM>

You have to reset everytime...

Objects: an applet with the name 'slider1', an applet ... 'grafiekAB', a button ... "Reset' and a method 'setModel', a button 'Run' and a method 'runModel', a form 'veld1' and a form with the name 'A8'. In the form 'A8' there are two applets, two buttons and one output-field.

t = t + dt
x = f1(p,t) 
y = f2(p,t) 

Two applets with the name 'slider1' and 'grafiekAB'; and the form "A8"

The function 'run' runs the model and the output until 'Tmax'.

Be careful: 1000 internal points in the internal buffer. More points gives java-error. See the other examples.

De maximum of y and the minimal of y you have to set with 'setYmaxb' and 'setYmaxb'.

You need the function infoFromJava_Slider (sliderNaam, waarde) for sending an event.

Enschede, 10 febr. 2000; updated jan 2003.