Parametric curve plotter: Difference between revisions
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<textarea cols=60 rows=4 id="eingabe">function x(t) {return Math.cos(t); }; | <textarea cols=60 rows=4 id="eingabe">function x(t) {return Math.cos(t); }; | ||
function y(t) {return Math.sin(t); };</textarea><br /> | function y(t) {return Math.sin(t); };</textarea><br /> | ||
<input type="button" value="plot" onClick=" | <input type="button" value="plot" onClick="plot()"> | ||
<input type="button" value="clear all" onClick="clearAll()"> | <input type="button" value="clear all" onClick="clearAll()"> | ||
</p> | </p> | ||
| Line 11: | Line 11: | ||
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],[0,1,4*Math.PI]], {style:6, name:'b'}); | ||
function | function plot(){ | ||
eval(document.getElementById("eingabe").value); | eval(document.getElementById("eingabe").value); | ||
graph = board.createElement('curve', [ | graph = board.createElement('curve', [ | ||
| Line 22: | Line 22: | ||
board.update(); | board.update(); | ||
} | } | ||
function clearAll() { | function clearAll() { | ||
JXG.JSXGraph.freeBoard(board); | JXG.JSXGraph.freeBoard(board); | ||
| Line 29: | Line 29: | ||
b = board.createElement('slider', [[0,-2],[5,-2],[0,1,4*Math.PI]], {style:6, name:'b'}); | b = board.createElement('slider', [[0,-2],[5,-2],[0,1,4*Math.PI]], {style:6, name:'b'}); | ||
} | } | ||
plot(); | |||
</jsxgraph> | </jsxgraph> | ||
===The JavaScript code=== | ===The JavaScript code=== | ||
<source lang=" | <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],[0,1,4*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],[5,-1],[-4*Math.PI,0,0]], {style:6, name:'a'}); | |||
b = board.createElement('slider', [[0,-2],[5,-2],[0,1,4*Math.PI]], {style:6, name:'b'}); | |||
} | |||
plot(); | |||
<source> | <source> | ||
[[Category:Examples]] | [[Category:Examples]] | ||
[[Category:Calculus]] | [[Category:Calculus]] | ||
Revision as of 19:44, 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],[0,1,4*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],[5,-1],[-4*Math.PI,0,0]], {style:6, name:'a'});
b = board.createElement('slider', [[0,-2],[5,-2],[0,1,4*Math.PI]], {style:6, name:'b'});
}
plot(); <source>
