Canvas 3D球形文字云动画特效
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2022-10-04 21:50:08
Canvas 3D球形文字云动画特效 效果图： 代码如下，复制即可使用： （适用浏览器：360、FireFox、Chrome、Opera、傲游、搜狗、世界之窗. 不支持Safari、IE8及以下浏览器。） canvas.min.js 如有错误，欢迎联系我改正，非常感谢！！！ ......
canvas 3d球形文字云动画特效
效果图：
代码如下，复制即可使用：
（适用浏览器：360、firefox、chrome、opera、傲游、搜狗、世界之窗. 不支持safari、ie8及以下浏览器。）
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>canvas 3d球形文字云动画特效</title>
<style>
body {
background-color:#000000;
color:#555555;
}
h4 {
font-family:sans-serif;
color:#555555;
font-size:16px;
}
h3 {
font-family:sans-serif;
color:#555555;
}
p {
font-family:sans-serif;
color:#888888;
font-size:14px;
}
a {
font-family:sans-serif;
color:#d15423;
text-decoration:none;
}
</style>
</head>
<body>
<!-- 此处需要自己修改路径 -->
<script src="js/canvas.min.js"></script>
<div style="text-align:center">
<canvas id="canvasone" width="900" height="520" ></canvas>
</div>
<script type="text/javascript">
window.addeventlistener("load", windowloadhandler, false);
var sphererad = 280;
var radius_sp=1;
var opt_display_dots = false;
var unicodeflakes = ['?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '我', '蒌', '火', '的', '山', '首', '页', '嫖', '是', '肺', '化', '?', '化', '?', '符', '?', '是', '原', '子', '序', '?', '是', '它', '是', '肺', '灰', '白', '色', '?', '金', '?', '有', '光', '?', '冱', '硬', '?', '於', '碳', '族', '化', '?', '性', '冱', '陪', '同', '族', '的', '遽', '陪', '矽', '相', '共', '有', '五', '肺', '同', '位', '素', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '才', '菜', '参', '餐', '层', '茶', '差', '长', '常', '场', '唱', '超', '车', '成', '城', '程', '吃', '店', '定', '订', '丢', '东', '冬', '懂', '动', '都', '读', '独', '度', '短', '对', '多', '饿', '儿', '而', '发', '法', '反', '饭', '方', '房', '放', '飞', '非', '费', '分', '份', '风', '封', '夫', '服', '附', '父', '复', '该', '改', '干', '感', '刚', '高', '告', '哥', '歌', '格', '个', '给', '号', '喝', '和', '河', '贺', '黑', '很', '红', '后', '候', '湖', '护', '花', '化', '画', '话', '坏', '欢', '还', '换', '黄', '回', '会', '婚', '活', '火', '或', '机', '鸡', '级', '极', '急', '际', '济', '继', '寄', '加', '家', '假', '价', '力', '历', '丽', '联', '凉', '两', '亮', '谅', '辆', '了', '林', '零', '六', '楼', '路', '录', '旅', '妈', '马', '码', '吗', '买', '卖', '满', '慢', '忙', '猫', '毛', '贸', '么', '没', '每', '美', '妹', '米', '面', '民', '明', '末', '母', '目', '拿', '哪', '那', '奶', '男', '南', '难', '脑', '呢', '能', '你', '年', '念', '鸟', '您', '牛', '农', '努', '女', '暖', '欧', '怕', '乓', '旁', '胖', '跑', '朋', '片', '漂', '票', '乒', '平', '期', '其', '奇', '骑', '起', '气', '汽', '千', '前', '签', '轻', '清', '情', '请', '秋', '球', '区', '取', '去', '趣', '全', '然', '让', '首', '售', '书', '术', '树', '双', '谁', '水', '睡', '说', '司', '思', '死', '四', '送', '诉', '算', '虽', '岁', '孙', '所', '他', '她', '它', '台', '太', '谈', '汤', '堂', '套', '特', '踢', '提', '题', '体', '天', '填', '条', '铁', '听', '厅', '庭', '通', '同', '头', '图', '外', '玩', '完', '晚', '万', '王', '网', '往', '忘', '望', '卫', '为', '位', '文', '我', '卧', '五', '午', '务', '物', '西', '吸', '希', '息', '习', '牙', '亚', '烟', '言', '羊', '阳', '样', '药', '要', '也', '业', '夜', '一', '衣', '医', '已', '以', '易', '意', '因', '音', '印', '银', '应', '英', '影', '硬', '用', '邮', '油', '游', '友', '有', '又', '右', '鱼', '愉', '雨', '语', '元', '员', '园', '原', '远', '院', '愿', '月', '在', '早', '怎', '张', '找', '照', '者', '这', '真', '正', '证', '知', '只', '之', '直', '止', '纸', '至', '治', '中', '钟', '种', '重', '周', '洲', '主', '住', '助', '祝', '注', '专', '准' ];
//for debug messages
var debugger = function() { };
debugger.log = function(message) {
try {
console.log(message);
}
catch (exception) {
return;
}
}
function windowloadhandler() {
canvasapp();
}
function canvassupport() {
return modernizr.canvas;
}
function canvasapp() {
if (!canvassupport()) {
return;
}
var thecanvas = document.getelementbyid("canvasone");
var context = thecanvas.getcontext("2d");
var displaywidth;
var displayheight;
var timer;
var wait;
var count;
var numtoaddeachframe;
var particlelist;
var recyclebin;
var particlealpha;
var r,g,b;
var flen;
var m;
var projcenterx;
var projcentery;
var zmax;
var turnangle;
var turnspeed;
var spherecenterx, spherecentery, spherecenterz;
var particlerad;
var zeroalphadepth;
var randaccelx, randaccely, randaccelz;
var gravity;
var rgbstring;
//we are defining a lot of variables used in the screen update functions globally so that they don't have to be redefined every frame.
var p;
var outsidetest;
var nextparticle;
var sinangle;
var cosangle;
var rotx, rotz;
var depthalphafactor;
var i;
var theta, phi;
var x0, y0, z0;
init();
// initialli
function init() {
wait = 1;
count = wait - 1;
numtoaddeachframe = 4;
//particle color
r = 70;
g = 255;
b = 140;
rgbstring = "rgba("+r+","+g+","+b+","; //partial string for color which will be completed by appending alpha value.
particlealpha = 1; //maximum alpha
displaywidth = thecanvas.width;
displayheight = thecanvas.height;
flen = 320; //represents the distance from the viewer to z=0 depth.
//projection center coordinates sets location of origin
projcenterx = displaywidth/2;
projcentery = displayheight/2;
//we will not draw coordinates if they have too large of a z-coordinate (which means they are very close to the observer).
zmax = flen-2;
particlelist = {};
recyclebin = {};
//random acceleration factors - causes some random motion
randaccelx = 0.1;
randaccely = 0.1;
randaccelz = 0.1;
gravity = -0; //try changing to a positive number (not too large, for example 0.3), or negative for floating upwards.
particlerad = 2.5;
spherecenterx = 0;
spherecentery = 0;
spherecenterz = -3 - sphererad;
//alpha values will lessen as particles move further back, causing depth-based darkening:
zeroalphadepth = -750;
turnspeed = 2*math.pi/1200; //the sphere will rotate at this speed (one complete rotation every 1600 frames).
turnangle = 0; //initial angle
timer = setinterval(ontimer, 10/24);
}
function ontimer() {
//if enough time has elapsed, we will add new particles.
count++;
if (count >= wait) {
count = 0;
for (i = 0; i < numtoaddeachframe; i++) {
theta = math.random()*2*math.pi;
phi = math.acos(math.random()*2-1);
x0 = sphererad*math.sin(phi)*math.cos(theta);
y0 = sphererad*math.sin(phi)*math.sin(theta);
z0 = sphererad*math.cos(phi);
//we use the addparticle function to add a new particle. the parameters set the position and velocity components.
//note that the velocity parameters will cause the particle to initially fly outwards away from the sphere center (after
//it becomes unstuck).
var p = addparticle(x0, spherecentery + y0, spherecenterz + z0, 0.002*x0, 0.002*y0, 0.002*z0);
//we set some "envelope" parameters which will control the evolving alpha of the particles.
p.attack = 50;
p.hold = 50;
p.decay = 100;
p.initvalue = 0;
p.holdvalue = particlealpha;
p.lastvalue = 0;
//the particle will be stuck in one place until this time has elapsed:
p.stucktime = 90 + math.random()*20;
p.accelx = 0;
p.accely = gravity;
p.accelz = 0;
}
}
//update viewing angle
turnangle = (turnangle + turnspeed) % (2*math.pi);
sinangle = math.sin(turnangle);
cosangle = math.cos(turnangle);
//background fill
context.fillstyle = "#000000";
context.fillrect(0,0,displaywidth,displayheight);
//update and draw particles
p = particlelist.first;
while (p != null) {
//before list is altered record next particle
nextparticle = p.next;
//update age
p.age++;
//if the particle is past its "stuck" time, it will begin to move.
if (p.age > p.stucktime) {
p.velx += p.accelx + randaccelx*(math.random()*2 - 1);
p.vely += p.accely + randaccely*(math.random()*2 - 1);
p.velz += p.accelz + randaccelz*(math.random()*2 - 1);
p.x += p.velx;
p.y += p.vely;
p.z += p.velz;
}
/*
we are doing two things here to calculate display coordinates.
the whole display is being rotated around a vertical axis, so we first calculate rotated coordinates for
x and z (but the y coordinate will not change).
then, we take the new coordinates (rotx, y, rotz), and project these onto the 2d view plane.
*/
rotx = cosangle*p.x + sinangle*(p.z - spherecenterz);
rotz = -sinangle*p.x + cosangle*(p.z - spherecenterz) + spherecenterz;
m =radius_sp* flen/(flen - rotz);
p.projx = rotx*m + projcenterx;
p.projy = p.y*m + projcentery;
//update alpha according to envelope parameters.
if (p.age < p.attack+p.hold+p.decay) {
if (p.age < p.attack) {
p.alpha = (p.holdvalue - p.initvalue)/p.attack*p.age + p.initvalue;
}
else if (p.age < p.attack+p.hold) {
p.alpha = p.holdvalue;
}
else if (p.age < p.attack+p.hold+p.decay) {
p.alpha = (p.lastvalue - p.holdvalue)/p.decay*(p.age-p.attack-p.hold) + p.holdvalue;
}
}
else {
p.dead = true;
}
//see if the particle is still within the viewable range.
if ((p.projx > displaywidth)||(p.projx<0)||(p.projy<0)||(p.projy>displayheight)||(rotz>zmax)) {
outsidetest = true;
}
else {
outsidetest = false;
}
if (outsidetest||p.dead) {
recycle(p);
}
else {
//depth-dependent darkening
depthalphafactor = (1-rotz/zeroalphadepth);
depthalphafactor = (depthalphafactor > 1) ? 1 : ((depthalphafactor<0) ? 0 : depthalphafactor);
context.fillstyle = rgbstring + depthalphafactor*p.alpha + ")";
/*add text function!*/
context.filltext(p.flake,p.projx, p.projy);
/*add text function!*/
//draw
context.beginpath();
if(opt_display_dots)
{context.arc(p.projx, p.projy, m*particlerad, 0, 2*math.pi, false);}
context.closepath();
context.fill();
}
p = nextparticle;
}
}
function addparticle(x0,y0,z0,vx0,vy0,vz0) {
var newparticle;
var color;
//check recycle bin for available drop:
if (recyclebin.first != null) {
newparticle = recyclebin.first;
//remove from bin
if (newparticle.next != null) {
recyclebin.first = newparticle.next;
newparticle.next.prev = null;
}
else {
recyclebin.first = null;
}
}
//if the recycle bin is empty, create a new particle (a new ampty object):
else {
newparticle = {};
}
//add to beginning of particle list
if (particlelist.first == null) {
particlelist.first = newparticle;
newparticle.prev = null;
newparticle.next = null;
}
else {
newparticle.next = particlelist.first;
particlelist.first.prev = newparticle;
particlelist.first = newparticle;
newparticle.prev = null;
}
//initialize
newparticle.x = x0;
newparticle.y = y0;
newparticle.z = z0;
newparticle.velx = vx0;
newparticle.vely = vy0;
newparticle.velz = vz0;
newparticle.age = 0;
newparticle.dead = false;
newparticle.flake = unicodeflakes[math.floor(math.random() * unicodeflakes.length)];
if (math.random() < 0.5) {
newparticle.right = true;
}
else {
newparticle.right = false;
}
return newparticle;
}
function recycle(p) {
//remove from particlelist
if (particlelist.first == p) {
if (p.next != null) {
p.next.prev = null;
particlelist.first = p.next;
}
else {
particlelist.first = null;
}
}
else {
if (p.next == null) {
p.prev.next = null;
}
else {
p.prev.next = p.next;
p.next.prev = p.prev;
}
}
//add to recycle bin
if (recyclebin.first == null) {
recyclebin.first = p;
p.prev = null;
p.next = null;
}
else {
p.next = recyclebin.first;
recyclebin.first.prev = p;
recyclebin.first = p;
p.prev = null;
}
}
}
</script>
<div style="text-align:center;margin:50px 0; font:normal 14px/24px 'microsoft yahei';">
<p>适用浏览器：360、firefox、chrome、opera、傲游、搜狗、世界之窗. 不支持safari、ie8及以下浏览器。</p>
</div>
</body>
</html>
canvas.min.js
/* modernizr 2.6.2 (custom build) | mit & bsd
* build: http://modernizr.com/download/#-fontface-backgroundsize-borderimage-borderradius-boxshadow-flexbox-hsla-multiplebgs-opacity-rgba-textshadow-cssanimations-csscolumns-generatedcontent-cssgradients-cssreflections-csstransforms-csstransforms3d-csstransitions-applicationcache-canvas-canvastext-draganddrop-hashchange-history-audio-video-indexeddb-input-inputtypes-localstorage-postmessage-sessionstorage-websockets-websqldatabase-webworkers-geolocation-inlinesvg-smil-svg-svgclippaths-touch-webgl-shiv-mq-cssclasses-addtest-prefixed-teststyles-testprop-testallprops-hasevent-prefixes-domprefixes-load
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