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Author Topic: Physlets An attempt at bar magnet using physletbuilder java applet  (Read 5398 times)
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lookang
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on: September 02, 2008, 10:51:27 am » posted from:Singapore,,Singapore

 name="AppletNames" value="Bfield">






* physletsmagnetic.PNG (40.77 KB, 643x523 - viewed 75 times.)
« Last Edit: July 25, 2009, 10:54:56 pm by lookang » Logged
Fu-Kwun Hwang
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Reply #1 on: September 09, 2008, 02:32:38 pm » posted from:Taipei,T'ai-pei,Taiwan

I copied the same code here:


 name="AppletNames" value="Bfield">



The javascript code is the following:
var timerID2=0;
function initApplets2(){
 clearTimeout(timerID2);
 loaded2=true;
 timerID2=setTimeout("init2()",100);
}
function init2(){
 fkh2=document.Bfield2;// define id for the physlet applet
 fkh2.setAutoRefresh(false);
 fkh2.setDefault();
 id=new Array(18);
 x1=0;
 id0=fkh2.addObject("coil","x=0.0,y=0.0,i=0,r=0.1");// no current, just for drag effect
 for(i=0;i<18;i++){
  param="x="+x1+",y=0,i=1,r=0.1";
  id[ i ]=fkh2.addObject("coil",param);
  x1+=0.02;
 }
 fkh2.setDragable(id0,true);
 fkh2.setAutoRefresh(true);
}

function movetodrag(){
 x2=fkh2.getXPos(id0);
 y2=fkh2.getYPos(id0);
 for(i=0;i<18;i++){
  fkh2.setXPos(id[ i ],x2);
  fkh2.setYPos(id[ i ],y2);
  x2+=0.02;
 }
}

And the button just call movetodrag()!
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"There is nothing either good or bad, but thinking makes it so." ..."Shakespeare (154-1616, English dramatist and poet) "
 
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