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biaobai.html
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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title> love for Feb.14 2015 </title>
<style type="text/css">
body {margin:0; padding:0; wdith:100%; height: 100%}
canvas {display:block; background-color:#000}
</style>
</head>
<body bgcolor='#000'>
<script src='//code.jquery.com/jquery.js'></script>
<script>
/*
vector.js
常用二维三维矢量操作view-source:http://zichi.date/2015/love-on-20150214/
@author zichi
*/
/* 二维矢量类 */
function Vector2(x, y) {
this.x = x || 0;
this.y = y || 0;
}
Vector2.prototype.reset = function(x, y) {
this.x = x || this.x;
this.y = y || this.y;
};
Vector2.prototype.scale = function(s) {
this.x *= s;
this.y *= s;
};
Vector2.prototype.clone = function() {
return new Vector2(this.x, this.y);
};
Vector2.prototype.add = function(v) {
this.x += v.x;
this.y += v.y;
};
Vector2.prototype.addNew = function(v) {
return new Vector2(this.x + v.x, this.y + v.y);
};
Vector2.prototype.minus = function(v) {
this.x -= v.x;
this.y -= v.y;
};
Vector2.prototype.minusNew = function(v) {
return new Vector2(this.x - v.x, this.y - v.y);
};
Vector2.prototype.getMid = function(v) {
return new Vector2((this.x + v.x) / 2, (this.y + v.y) / 2);
};
// 向量点积得到夹角cos值，大于0为0~90度
Vector2.prototype.dot = function(v) {
return this.x * v.x + this.y * v.y;
};
Vector2.prototype.length = function() {
return Math.sqrt(this.sqrLength());
};
Vector2.prototype.sqrLength = function() {
return this.x * this.x + this.y * this.y;
};
Vector2.prototype.getDistance = function(v) {
var dis = (this.x - v.x) * (this.x - v.x) + (this.y - v.y) * (this.y - v.y);
return Math.sqrt(dis);
};
// 标准化，单位长度为1
Vector2.prototype.normalize = function() {
var inv = 1 / this.length();
return new Vector2(this.x * inv, this.y * inv);
};
Vector2.prototype.getAngle = function() {
return Math.atan2(this.y, this.x);
};
/* 三维矢量类 */
function Vector3(x, y, z) {
this.x = x || 0;
this.y = y || 0;
this.z = z || 0;
}
Vector3.prototype.scale = function(s) {
this.x *= s;
this.y *= s;
this.z *= s;
};
Vector3.prototype.reset = function(x, y, z) {
this.x = x || this.x;
this.y = y || this.y;
this.z = z || this.z;
};
Vector3.prototype.clone = function() {
return new Vector3(this.x, this.y, this.z);
};
Vector3.prototype.add = function(v) {
this.x += v.x;
this.y += v.y;
this.z += v.z;
};
Vector3.prototype.addNew = function(v) {
return new Vector3(this.x + v.x, this.y + v.y, this.z + v.z);
};
Vector3.prototype.minus = function(v) {
this.x -= v.x;
this.y -= v.y;
this.z -= v.z;
};
Vector3.prototype.minusNew = function(v) {
return new Vector3(this.x - v.x, this.y - v.y, this.z - v.z);
};
// 向量点积得到夹角cos值，大于0为0~90度
Vector3.prototype.dot = function(v) {
return this.x * v.x + this.y * v.y + this.z * v.z;
};
Vector3.prototype.length = function() {
return Math.sqrt(this.sqrLength());
};
Vector3.prototype.sqrLength = function() {
return this.x * this.x + this.y * this.y + this.z * this.z;
};
Vector3.prototype.getDistance = function(v) {
var dis = (this.x - v.x) * (this.x - v.x) + (this.y - v.y) * (this.y - v.y) + (this.z - v.z) * (this.z - v.z);
return Math.sqrt(dis);
};
// 标准化，单位长度为1
Vector3.prototype.normalize = function() {
var inv = 1 / this.length();
return new Vector3(this.x * inv, this.y * inv, this.z * inv);
}
// 矢量旋转
Vector3.prototype.rotateX = function(angleX) {
var cosx = Math.cos(angleX);
var sinx = Math.sin(angleX);
var y1 = this.y * cosx - this.z * sinx;
var z1 = this.y * sinx + this.z * cosx;
this.y = y1;
this.z = z1;
};
Vector3.prototype.rotateY = function(angleY) {
var cosy = Math.cos(angleY);
var siny = Math.sin(angleY);
var x1 = this.z * siny + this.x * cosy;
var z1 = this.z * cosy - this.x * siny;
this.x = x1;
this.z = z1;
};
Vector3.prototype.rotateP = function(v, angleP) {
var c = Math.cos(angleP);
var s = Math.sin(angleP);
// v为旋转轴单位向量
var x = v.x;
var y = v.y;
var z = v.z;
var new_x = (x * x * (1 - c) + c) * this.x + (x * y * (1 - c) - z * s) * this.y + (x * z * (1 - c) + y * s) * this.z;
var new_y = (y * x * (1 - c) + z * s) * this.x + (y * y * (1 - c) + c) * this.y + (y * z * (1 - c) - x * s) * this.z;
var new_z = (x * z * (1 - c) - y * s) * this.x + (y * z * (1 - c) + x * s) * this.y + (z * z * (1 - c) + c) * this.z;
this.reset(new_x, new_y, new_z);
};
</script>
<script>
window.onload = function() {
function Ball(v, current, r, g, b, a) {
this.pos2 = v; // 目标位置
this.now = current;
this.r = r;
this.g = g;
this.b = b;
this.a = a;
this.state = 1;
}
Ball.prototype.draw = function() {
ctx.beginPath();
ctx.fillStyle = 'rgba(' + this.r + ',' + this.g + ',' + this.b + ',' + this.a +')';
ctx.arc(this.now.x, this.now.y, 1, 0, Math.PI * 2, true);
ctx.fill();
}
var stage = {
balls: [], //
// balls[0] I
// balls[1] love
// balls[2] 慧
// balls[3] love.png
// balls[4] forever
// balls[5] 签名
index: +new Date,
init: function() {
// ctx.globalCompositeOperation = 'lighter'
for(var i = 0; i < 6; i++)
this.balls[i] = [];
window.canvas = document.createElement('canvas');
document.body.appendChild(window.canvas);
canvas.height = window.height = window.innerHeight;
canvas.width = window.width = window.innerWidth;
window.ctx = canvas.getContext('2d');
},
putText: function() {
var ocanvas = document.createElement('canvas');
// document.body.appendChild(ocanvas);
ocanvas.height = window.innerHeight;
ocanvas.width = window.innerWidth;
var octx = ocanvas.getContext('2d');
octx.font = "100px 微软雅黑"
octx.textAlign = "center";
octx.textBaseline = "middle";
octx.fillStyle = 'rgba(117,74,14,1)';
octx.fillText('I', width/2+150, height/2);
this.getTextPoints(octx, 0);
octx.clearRect(0, 0, width, height)
octx.font = "100px 微软雅黑"
octx.textAlign = "center";
octx.textBaseline = "middle";
octx.fillStyle = 'rgba(166,74,79,1)';
octx.fillText('love', width/2, height/2);
this.getTextPoints(octx, 1);
octx.clearRect(0, 0, width, height)
octx.font = "120px 微软雅黑"
octx.textAlign = "center";
octx.textBaseline = "middle";
octx.fillStyle = 'rgba(142,101,2,1)';
octx.fillText('慧', width/2 - 180, height/2 );
this.getTextPoints(octx, 2);
octx.clearRect(0, 0, width, height)
octx.font = "120px 微软雅黑"
octx.textAlign = "center";
octx.textBaseline = "middle";
octx.fillStyle = 'rgba(152,52,13,1)';
octx.fillText('4ever', width/2+50, height/2+10);
this.getTextPoints(octx, 4);
octx.clearRect(0, 0, width, height)
octx.font = "20px 微软雅黑"
// octx.font = "bold 12px serif"
octx.textAlign = "center";
octx.textBaseline = "middle";
octx.fillStyle = 'rgba(166,74,79,1)';
octx.fillText('————— 2017.2.29 by suping', width/2+70, height/2+90);
this.getTextPoints(octx, 5);
octx.clearRect(0, 0, width, height)
var img = new Image();
img.src = "http://zichi.date/2015/love-on-20150214/img/love.png";
// var img = document.getElementById('img');
var that = this;
img.onload = function () {
octx.drawImage(img, width/2 -150 - 185, height/2-40);
that.getTextPoints(octx, 3);
}
// this.balls.sort(function (a, b) {
// return a.pos2.x > b.pos2.x ? 1 : 0;
// });
},
draw: function() {
ctx.clearRect(0, 0, width, height);
for(var i = 0; i < 6; i++) {
if(i === 3 && +new Date - this.index < 6000) continue;
if(i === 4 && +new Date - this.index < 7000) continue;
if(i === 5 && +new Date - this.index < 10000) continue;
for(var j = 0, len = this.balls[i].length; j < len; j++) {
this.balls[i][j].draw();
}
for(var j = 0; j < this.balls[i].length; j++) {
if(i === 1 && this.balls[i][j].now.y > height)
this.balls[i].splice(j, 1);
}
}
},
update: function() {
for(var i = 0; i < 6; i++) {
if(i === 3 && +new Date - this.index < 6000) continue;
if(i === 4 && +new Date - this.index < 7000) continue;
if(i === 5 && +new Date - this.index < 10000) continue;
for(var j = 0, len = this.balls[i].length; j < len; j++) {
var b = this.balls[i][j];
var addV = b.pos2.minusNew(b.now);
addV.scale(0.1);
b.now.add(addV);
}
}
// love
if(+new Date - this.index > 3000) {
for(var i = 0, len = this.balls[1].length; i < len; i++) {
var b = this.balls[1][i];
if(b.state === 1) {
b.state = 2;
b.pos2 = new Vector2(Math.random() * width, height + 1)
}
}
}
// I
if(+new Date - this.index > 4000) {
for(var i = 0, len = this.balls[0].length; i < len; i++) {
var b = this.balls[0][i];
if(b.state === 1) {
b.state = 2;
b.pos2 = new Vector2(b.pos2.x - 500, b.pos2.y)
}
}
}
},
getTextPoints: function(c, id) {
var array = this.balls[id];
var num = 0;
var imgData = c.getImageData(0, 0, width, height);
for(var i = 0; i < imgData.width; i+=3)
for(var j = 0; j < imgData.height; j+=3) {
var index = (i + j * imgData.width) * 4 + 3;
if(imgData.data[index]) {
var r = imgData.data[index - 3];
var g = imgData.data[index - 2];
var b = imgData.data[index - 1];
var a = imgData.data[index];
var current = new Vector2(width * Math.random(), height * Math.random());
if(id !== 3 && id !== 4 && id !==5 )
array.push(new Ball(new Vector2(i, j), current, r, g, b, a));
else if(id === 3 || id === 4) {
// console.log(1)
cc = new Vector2(Math.random() * width, height + 1);
array.push(new Ball(new Vector2(i, j), cc, r, g, b, a));
} else {
array.push(new Ball(new Vector2(i, j), new Vector2(i + Math.random() * 20 - 10 , j + Math.random() * 20 - 10 ), r, g, b, a));
}
}
}
}
};
stage.init();
stage.putText();
setInterval(function() {
stage.draw();
stage.update();
}, 1000/60)
}
</script>
</body>
</html>