Difference between revisions of "Polar curve plotter"

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Line 41: Line 41:
 
   eval(document.getElementById("eingabe").value);
 
   eval(document.getElementById("eingabe").value);
 
   graph = board.createElement('curve', [
 
   graph = board.createElement('curve', [
             x,y,  
+
             r, [0,0],  
 
             function(){return a.Value();},  
 
             function(){return a.Value();},  
 
             function(){return b.Value();}
 
             function(){return b.Value();}
 
             ],  
 
             ],  
             {strokeColor:'red', strokeWidth:2}
+
             {curveType:'polar',strokeColor:'red', strokeWidth:2}
 
           );
 
           );
 
   board.update();
 
   board.update();

Revision as of 18:45, 20 March 2012


The JavaScript code

board = JXG.JSXGraph.initBoard('jxgbox', {axis:true, boundingbox:[-5,5,5,-5]});
a = board.createElement('slider', [[0,-1],[3,-1],[-4*Math.PI,0,0]], {style:6, name:'a'});
b = board.createElement('slider', [[0,-2],[3,-2],[0,7,4*Math.PI]], {style:6, name:'b'});
function plot(){
  eval(document.getElementById("eingabe").value);
  graph = board.createElement('curve', [
            r, [0,0], 
            function(){return a.Value();}, 
            function(){return b.Value();}
            ], 
            {curveType:'polar',strokeColor:'red', strokeWidth:2}
          );
  board.update();
} 

function clearAll() { 
  JXG.JSXGraph.freeBoard(board);
  board = JXG.JSXGraph.initBoard('jxgbox', {axis:true, originX: 250, originY: 250, unitX: 50, unitY: 50});
  a = board.createElement('slider', [[0,-1],[3,-1],[-4*Math.PI,0,0]], {style:6, name:'a'});
  b = board.createElement('slider', [[0,-2],[3,-2],[0,7,4*Math.PI]], {style:6, name:'b'});
}

plot();