Difference between revisions of "Polar curve plotter"

From JSXGraph Wiki
Jump to navigationJump to search
Line 1: Line 1:
 
<html>
 
<html>
 
<p>
 
<p>
   <textarea cols=60 rows=4 id="eingabe">function r(t) {return t; };
+
   <textarea cols=60 rows=4 id="eingabe">function r(t) {return 0.2*t; };
 
</textarea><br />
 
</textarea><br />
 
   <input type="button" value="plot" onClick="plot()">
 
   <input type="button" value="plot" onClick="plot()">
Line 10: Line 10:
 
board = JXG.JSXGraph.initBoard('jxgbox', {axis:true, boundingbox:[-5,5,5,-5]});
 
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'});
 
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],[0,1,4*Math.PI]], {style:6, name:'b'});
+
b = board.createElement('slider', [[0,-2],[3,-2],[0,5,4*Math.PI]], {style:6, name:'b'});
 
function plot(){
 
function plot(){
 
   eval(document.getElementById("eingabe").value);
 
   eval(document.getElementById("eingabe").value);
Line 27: Line 27:
 
   board = JXG.JSXGraph.initBoard('jxgbox', {axis:true, originX: 250, originY: 250, unitX: 50, unitY: 50});
 
   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'});
 
   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],[0,1,4*Math.PI]], {style:6, name:'b'});
+
   b = board.createElement('slider', [[0,-2],[3,-2],[0,5,4*Math.PI]], {style:6, name:'b'});
 
}
 
}
  
Line 37: Line 37:
 
board = JXG.JSXGraph.initBoard('jxgbox', {axis:true, boundingbox:[-5,5,5,-5]});
 
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'});
 
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],[0,1,4*Math.PI]], {style:6, name:'b'});
+
b = board.createElement('slider', [[0,-2],[3,-2],[0,5,4*Math.PI]], {style:6, name:'b'});
 
function plot(){
 
function plot(){
 
   eval(document.getElementById("eingabe").value);
 
   eval(document.getElementById("eingabe").value);
Line 54: Line 54:
 
   board = JXG.JSXGraph.initBoard('jxgbox', {axis:true, originX: 250, originY: 250, unitX: 50, unitY: 50});
 
   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'});
 
   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],[0,1,4*Math.PI]], {style:6, name:'b'});
+
   b = board.createElement('slider', [[0,-2],[3,-2],[0,5,4*Math.PI]], {style:6, name:'b'});
 
}
 
}
  

Revision as of 21:51, 1 July 2009


The JavaScript code

<source lang="javascript"> 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],[0,5,4*Math.PI]], {style:6, name:'b'}); function plot(){

 eval(document.getElementById("eingabe").value);
 graph = board.createElement('curve', [
           x,y, 
           function(){return a.Value();}, 
           function(){return b.Value();}
           ], 
           {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],[0,5,4*Math.PI]], {style:6, name:'b'});

}

plot(); <source>