<!DOCTYPE html>
<html lang="en">
<head>
<title>爱心</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<style>
body {
font-family: Monospace;
background-color: #f0f0f0;
margin: 0px;
overflow: hidden;
}
</style>
</head>
<body>
<script src="js/nb.js"></script>
<script src="js/Projector.js"></script>
<script src="js/CanvasRenderer.js"></script>
<script src="js/tween.min.js"></script>
<script src="js/Sparks.js"></script>
<!-- load the font file from canvas-text -->
<script src="js/helvetiker_regular.typeface.js"></script>
<script>
var container;
var camera, scene, renderer;
var group, text, plane;
var targetRotation = 0;
var targetRotationOnMouseDown = 0;
var mouseX = 0;
var mouseXOnMouseDown = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
var heartShape, particleCloud, sparksEmitter, emitterPos;
var _rotation = 0;
var timeOnShapePath = 0;
init();
animate();
function init() {
container = document.createElement('div');
document.body.appendChild(container);
//相机
camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 1, 1000);
camera.position.set(0, 150, 800);
//场景
scene = new THREE.Scene();
group = new THREE.Group();
scene.add(group);
// Get text from hash
var string = "love";
var hash = document.location.hash.substr(1);
if (hash.length !== 0) {
string = hash;
}
var text3d = new THREE.TextGeometry(string, {
size: 80,
height: 20,
curveSegments: 2,
font: "helvetiker"
});
text3d.computeBoundingBox();
var centerOffset = -0.5 * (text3d.boundingBox.max.x - text3d.boundingBox.min.x);
var textMaterial = new THREE.MeshBasicMaterial({color: Math.random() * 0xffffff, overdraw: 0.5});
text = new THREE.Mesh(text3d, textMaterial);
// Potentially, we can extract the vertices or faces of the text to generate particles too.
// Geo > Vertices > Position
text.position.x = centerOffset;
text.position.y = 100;
text.position.z = 0;
text.rotation.x = 0;
text.rotation.y = Math.PI * 2;
group.add(text);
particleCloud = new THREE.Object3D(); // Just a group
particleCloud.y = 800;
group.add(particleCloud);
// Create Particle Systems
// Heart
var x = 0, y = 0;
heartShape = new THREE.Shape();
heartShape.moveTo(x + 25, y + 25);
heartShape.bezierCurveTo(x + 25, y + 25, x + 20, y, x, y);
heartShape.bezierCurveTo(x - 30, y, x - 30, y + 35, x - 30, y + 35);
heartShape.bezierCurveTo(x - 30, y + 55, x - 10, y + 77, x + 25, y + 95);
heartShape.bezierCurveTo(x + 60, y + 77, x + 80, y + 55, x + 80, y + 35);
heartShape.bezierCurveTo(x + 80, y + 35, x + 80, y, x + 50, y);
heartShape.bezierCurveTo(x + 35, y, x + 25, y + 25, x + 25, y + 25);
var hue = 0;
var hearts = function(context) {
context.globalAlpha = 0.5;
var x = 0, y = 0;
context.scale(0.05, -0.05); // Scale so canvas render can redraw within bounds
context.beginPath();
// From http://blog.burlock.org/html5/130-paths
context.bezierCurveTo(x + 2.5, y + 2.5, x + 2.0, y, x, y);
context.bezierCurveTo(x - 3.0, y, x - 3.0, y + 3.5, x - 3.0, y + 3.5);
context.bezierCurveTo(x - 3.0, y + 5.5, x - 1.0, y + 7.7, x + 2.5, y + 9.5);
context.bezierCurveTo(x + 6.0, y + 7.7, x + 8.0, y + 5.5, x + 8.0, y + 3.5);
context.bezierCurveTo(x + 8.0, y + 3.5, x + 8.0, y, x + 5.0, y);
context.bezierCurveTo(x + 3.5, y, x + 2.5, y + 2.5, x + 2.5, y + 2.5);
context.fill();
context.lineWidth = 0.5; //0.05
context.stroke();
}
var setTargetParticle = function() {
var material = new THREE.SpriteCanvasMaterial({
program: hearts
});
material.color.setHSL(hue, 1, 0.75);
hue += 0.001;
if (hue > 1)
hue -= 1;
particle = new THREE.Sprite(material);
particle.scale.x = particle.scale.y = Math.random() * 40 + 40;
particleCloud.add(particle);
return particle;
};
var onParticleCreated = function(p) {
p.target.position.copy(p.position);
};
var onParticleDead = function(particle) {
particle.target.visible = false;
particleCloud.remove(particle.target);
};
sparksEmitter = new SPARKS.Emitter(new SPARKS.SteadyCounter(160));
emitterpos = new THREE.Vector3();
sparksEmitter.addInitializer(new SPARKS.Position(new SPARKS.PointZone(emitterpos)));
sparksEmitter.addInitializer(new SPARKS.Lifetime(0, 2));
sparksEmitter.addInitializer(new SPARKS.Target(null, setTargetParticle));
sparksEmitter.addInitializer(new SPARKS.Velocity(new SPARKS.PointZone(new THREE.Vector3(0, -50, 10))));
// TOTRY Set velocity to move away from centroid
sparksEmitter.addAction(new SPARKS.Age());
//sparksEmitter.addAction(new SPARKS.Accelerate(0.2));
sparksEmitter.addAction(new SPARKS.Move());
sparksEmitter.addAction(new SPARKS.RandomDrift(50, 50, 2000));
sparksEmitter.addCallback("created", onParticleCreated);
sparksEmitter.addCallback("dead", onParticleDead);
sparksEmitter.addCallback("updated", function(particle) {
particle.target.position.copy(particle.position);
});
sparksEmitter.start();
// End Particles
renderer = new THREE.CanvasRenderer();
renderer.setClearColor(0xf0f0f0);
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
container.appendChild(renderer.domElement);
document.addEventListener('mousedown', onDocumentMouseDown, false);
document.addEventListener('touchstart', onDocumentTouchStart, false);
document.addEventListener('touchmove', onDocumentTouchMove, false);
//
window.addEventListener('resize', onWindowResize, false)
