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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Lines 3D 2</title>
<link rel="stylesheet" href="../include/style.css">
</head>
<body>
<header>
Example from <a href="http://amzn.com/1430236655?tag=html5anim-20"><em>Foundation HTML5 Animation with JavaScript</em></a>
</header>
<canvas id="canvas" width="400" height="400"></canvas>
<aside>Move mouse on canvas element.</aside>
<script src="../include/utils.js"></script>
<script src="./classes/point3d.js"></script>
<script>
window.onload = function () {
var canvas = document.getElementById('canvas'),
context = canvas.getContext('2d'),
mouse = utils.captureMouse(canvas),
points = [],
numPoints = 50,
fl = 250,
vpX = canvas.width / 2,
vpY = canvas.height / 2,
angleX, angleY;
for (var point, i = 0; i < numPoints; i++) {
point = new Point3d(Math.random() * 200 - 100,
Math.random() * 200 - 100,
Math.random() * 200 - 100);
point.setVanishingPoint(vpX, vpY);
points.push(point);
}
function move (point) {
point.rotateX(angleX);
point.rotateY(angleY);
}
function draw (point, i) {
if (i !== 0) {
context.lineTo(point.getScreenX(), point.getScreenY());
}
}
(function drawFrame () {
window.requestAnimationFrame(drawFrame, canvas);
context.clearRect(0, 0, canvas.width, canvas.height);
angleX = (mouse.y - vpY) * 0.001;
angleY = (mouse.x - vpX) * 0.001;
points.forEach(move);
context.beginPath();
//line starts at first point
context.moveTo(points[0].getScreenX(), points[0].getScreenY());
points.forEach(draw);
context.stroke();
}());
};
</script>
</body>
</html>