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<html>
<head>
<title>JSXGraph example</title>
<link rel="stylesheet" type="text/css" href="../distrib/jsxgraph.css" />
<script type="text/javascript" src="../distrib/jsxgraphcore.js"></script>
<script type="text/javascript" src="/javascript/jquery/jquery.js"></script>
<script id="shader-fs" type="x-shader/x-fragment">
#ifdef GL_ES
precision highp float;
#endifhandleAt
void main(void) {
gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0);
}
</script>
<script id="shader-vs" type="x-shader/x-vertex">
attribute vec3 aVertexPosition;
uniform mat4 uMVMatrix;
uniform mat4 uPMatrix;
void main(void) {
gl_Position = uPMatrix * uMVMatrix * vec4(aVertexPosition, 1.0);
}
</script>
</head>
<body>
<h2>Playground to test things temporarily. May change very often.</h2>
<!--a href="javascript:zoomPoints();">Zoom all points (new)</a><br />
<a href="javascript:brd.zoomAllPoints();">Zoom all points (old)</a><br />
<a href="javascript:zoomAll();">Zoom all elements (new)</a-->
<input type="text" id="input" value="sin(x)*x">
<input type="button" value="plot" onClick="plotter()">
<input type="button" value="clear all" onClick="clearAll()">
<div style="width:800px">
<div id="jxgbox" class="jxgbox" style="width:800px; height:800px; float:left;"></div>
<!--div id="jxgbox2" class="jxgbox" style="width:800px; height:800px; float:left"></div-->
</div>
<div id="debug" style="display:block;">DEBUG</div>
<a href="javascript:gJSX();" id="hideaxis">gJSX</a>
<img id="snapshot" />
<script type="text/javascript">
/* <![CDATA[ */
var rotate = (function () {
JXG.Options.text.display = 'internal';
var board = JXG.JSXGraph.initBoard('jxgbox', {axis: false, boundingbox: [-10,10,10,-10], grid: true, keepaspectratio: true}),
p = board.create('point', [1, 2]);
//p.label.content.addRotation(30);
//board.update();
// OR
p.label.content.setProperty({rotate: 30});
}());
var setprop = (function () {
var board = JXG.JSXGraph.initBoard('jxgbox', {axis: false, boundingbox: [-10,10,10,-10], grid: true, keepaspectratio: true}),
line, lines = ['Math.sin(x)', 'Math.cos(x)', 'Math.tan(x)'], funcs = {};
for (line in lines) {
var fname = 'f_'.concat(line);
funcs[fname] = (function (fun) {
return new Function ('x', 'return (' + fun + ');');
})(lines[line]);
board.create('functiongraph', [funcs['f_'.concat(line)]],{name: fname, strokeWidth: 2, dash:2, strokeColor : 'green', doAdvancedPlot:false});
}
board.create('axis', [[0, 0], [1, 0]], {ticks: {drawZero: false}});
});
var spline = (function () {
var board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-5, 10, 7, -5], axis:true});
var p = [];
p[0] = board.create('point', [-1,2], {size: 4, face: 'o'});
p[1] = board.create('point', [0,-1], {size: 4, face: 'o'});
p[2] = board.create('point', [1,0], {size: 4, face: 'o'});
p[3] = board.create('point', [2,1], {size: 4, face: 'o'});
var c = board.create('spline', p, {strokeWidth:3});
});
var alex_integral = (function () {
var board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox:[-5,8,8,-5], axis: {ticks: {scale: 3.14, scaleSymbol: 'π'}}, zoom: false, /*pan: false,*/ grid: false});
var p = board.create('plot', [Math.sin]);
var i = board.create('integral', [p, [-2, 2]], {label: {visible: false}, curveLeft: {color: 'green', size: 20, strokeWidth: 7}, color: 'blue'});
});
var simple = (function () {
var board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox:[-5,8,8,-5], axis: {ticks: {scale: 3.14, scaleSymbol: 'π'}}, zoom: false, /*pan: false,*/ grid: false});
var p = board.create('point', [0, 0], {label: {offset: [10,10]}});
var q = board.create('point', [3.14, 0], {label: {offset: [10,10]}});
var r = board.create('point', [0, 1], {label: {offset: [10,10]}});
var a = board.create('angle', [p, q, r]);
var t = board.create('text', [2, 2, '<button onclick="alert(\'Hello!\');">Click</button>'], {fixed: true});
});
var drei = (function () {
JXG.Options.renderer = 'svg';
var board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-5, 5, 5, -5]}),
cs = [
[-2, 2, 2, 1], [2, 2, 2, 1], [-2, 2, -2, 1], [2, 2, -2, 1],
//[0, -2, 0, 1], [0, -2, 0, 1], [0, -2, 0, 1], [0, -2, 0, 1]
[-2, -2, 2, 1], [2, -2, 2, 1], [-2, -2, -2, 1], [2, -2, -2, 1]
],
ps = [],
init = function () {
for (i = 0; i < cs.length; i++) {
//co = render(cs[i]);
ps[i] = board.create('point', [0, 0], {withLabel: false, trace: false});
ps[i].threeD = JXG.Math.Statistics.add(cs[i], [3, 0, 0]);
}
// back
board.create('segment', [ps[0], ps[1]]);
board.create('segment', [ps[2], ps[3]]);
board.create('segment', [ps[0], ps[2]]);
board.create('segment', [ps[1], ps[3]]);
// front
board.create('segment', [ps[4], ps[5]]);
board.create('segment', [ps[6], ps[7]]);
board.create('segment', [ps[4], ps[6]]);
board.create('segment', [ps[5], ps[7]]);
// left
board.create('segment', [ps[0], ps[4]]);
board.create('segment', [ps[2], ps[6]]);
// right
board.create('segment', [ps[1], ps[5]]);
board.create('segment', [ps[3], ps[7]]);
},
render = function (camera, points) {
var c = camera.position,//[6, 0, 6],
n = camera.normal,//[-2, 0, -2],
i, b, nt,
nl = Math.sqrt(JXG.Math.innerProduct(n, n)),
sgny = Math.abs(n[1]) < JXG.Math.eps ? 0 : (n[1] > 0 ? 1 : -1),
phi, theta,
rotx, roty, transform;
theta = 0;//-Math.atan2(n[1], n[2]);
phi = 0;//-Math.atan2(n[0], n[2]);
/*if (n[0] > 0) {
phi = Math.atan2(n[1], n[0]);
} else if (Math.abs(n[0]) < JXG.Math.eps) {
phi = sgny*Math.PI/2;
} else {
phi = Math.atan2(n[1], n[0]) + sgny*Math.PI;
}
theta = Math.acos(n[2]/nl);*/
rotx = [
[1, 0, 0, 0],
[0, Math.cos(theta), -Math.sin(theta), 0],
[0, Math.sin(theta), Math.cos(theta), 0],
[0, 0, 0, 1]
];
roty = [
[Math.cos(phi), 0, Math.sin(phi), 0],
[0, 1, 0, 0],
[-Math.sin(phi), 0, Math.cos(phi), 0],
[0, 0, 0, 1]
];
//transform = JXG.Math.matMatMult(JXG.Math.projection(Math.PI/4, 1, 0.1, 100), JXG.Math.matMatMult(rotx, roty));
transform = JXG.Math.matMatMult(rotx, roty);
nt = JXG.Math.matVecMult(transform, JXG.Math.Statistics.subtract(n, c));
console.log(nt);
for (i = 0; i < points.length; i++) {
b = JXG.Math.matVecMult(transform, JXG.Math.Statistics.subtract(points[i].threeD, c));
//points[i].moveTo(b[0], b[1]);
points[i].moveTo([Math.abs(nt[2])*b[0]/b[2], Math.abs(nt[2])*b[1]/b[2]]);
//points[i].moveTo([nl*b[0]/b[2], nl*b[1]/b[2]]);
}
//return ;
},
animate = function () {
render({
position: [12*Math.sin(t), 3, 12*Math.cos(t)],
normal: [-1*Math.sin(t), 0, -1*Math.cos(t)]
//normal: [-1*Math.sin(t)*(2+Math.sin(t)), 0, -1*Math.cos(t)*(2+Math.sin(t))]
}, ps);
t += 0.1;
//if (t > 2*Math.PI) {
// t = 0;
// }
setTimeout(animate, 100);
//document.getElementById('debug').innerHTML = t/Math.PI;
},
i, co, t = 0;
init();
/*render({
position: [6, 0, 6],
normal: [-2, 0, -2]
}, ps);*/
setTimeout(animate, 100);
var pmat = JXG.Math.transpose(JXG.Math.projection(Math.PI/4, 1, 0.1, 100));
var d = document.getElementById("debug");
d.innerHTML = '';
for (i = 0; i < pmat.length; i++) {
for (var j = 0; j < pmat[i].length; j++) {
d.innerHTML += pmat[i][j];
d.innerHTML += ', ';
}
d.innerHTML += '<br />';
}
//board.options.axis.majorHeight = 5;
//console.log(project([0, 0, 0]), project([1, 0, 0]), project([0, 1, 0]), project([0, 0, 1]));
// axes
/*var axp = {
visible: true,
withLabel: true,
face: 'x',
size: 5,
strokeWidth: 2,
strokeColor: 'green'
},
axl = {
withLabel: false,
strokeColor: 'black',
strokeWidth: 1,
lastArrow: true
},
o = board.create('point', render([0, 0, 0]), axp),
p100 = board.create('point', render([2, 0, 0]), axp),
p010 = board.create('point', render([0, 2, 0]), axp),
p001 = board.create('point', render([0, 0, 2]), axp),
xax = board.create('line', [o, p100], axl),
yax = board.create('line', [o, p010], axl),
zax = board.create('line', [o, p001], axl);*/
});
/* ]]> */
</script>
</body>
</html>
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