因为孤独是生命的常态，所以陪伴才显得格外珍贵。
一、图片3D展览效果
上传图片的大小有限制，录制的GIF图展示效果不是很好
录屏的效果见链接：https://www.bilibili.com/video/BV1Bi4y1E7wk/
二、代码实现
1. HTML代码
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<meta name="HandheldFriendly" content="true">
<meta name="description" content="图片3D展览屋">
<meta name="keywords" content="canvas,3D_picture,perspective,texturing,gallery">
<link href="res/slider-wb.css" rel="stylesheet">
<title>图片3D展览屋</title>
<style>
html
{
overflow:visible;
-ms-touch-action: none;
-ms-content-zooming: none;
}
body
{
position: absolute;
margin: 0px;
padding: 0px;
background: #fff;
width: 100%;
height: 100%;
}
#canvas
{
position: absolute;
width: 100%;
height: 100%;
background: #fff;
}
</style>
<script type="text/javascript" src="res/ge1doot.js"></script>
<script type="text/javascript">
"use strict";
(function () {
/* ==== definitions ==== */
var diapo = [], layers = [], ctx, pointer, scr, camera, light, fps = 0, quality = [1, 2],
// ---- poly constructor ----
Poly = function (parent, face) {
this.parent = parent;
this.ctx = ctx;
this.color = face.fill || false;
this.points = [];
if (!face.img) {
// ---- create points ----
for (var i = 0; i < 4; i++) {
this.points[i] = new ge1doot.transform3D.Point(
parent.pc.x + (face.x[i] * parent.normalZ) + (face.z[i] * parent.normalX),
parent.pc.y + face.y[i],
parent.pc.z + (face.x[i] * parent.normalX) + (-face.z[i] * parent.normalZ)
);
}
this.points[3].next = false;
}
},
// ---- diapo constructor ----
Diapo = function (path, img, structure) {
// ---- create image ----
this.img = new ge1doot.transform3D.Image(
this, path + img.img, 1, {
isLoaded: function (img) {
img.parent.isLoaded = true;
img.parent.loaded(img);
}
}
);
this.visible = false;
this.normalX = img.nx;
this.normalZ = img.nz;
// ---- point center ----
this.pc = new ge1doot.transform3D.Point(img.x, img.y, img.z);
// ---- target positions ----
this.tx = img.x + (img.nx * Math.sqrt(camera.focalLength) * 20);
this.tz = img.z - (img.nz * Math.sqrt(camera.focalLength) * 20);
// ---- create polygons ----
this.poly = [];
for (var i = -1, p; p = structure[++i]; ) {
layers[i] = (p.img === true ? 1 : 2);
this.poly.push(
new Poly(this, p)
);
}
},
// ---- init section ----
init = function (json) {
// draw poly primitive
Poly.prototype.drawPoly = ge1doot.transform3D.drawPoly;
// ---- init screen ----
scr = new ge1doot.Screen({
container: "canvas"
});
ctx = scr.ctx;
scr.resize();
// ---- init pointer ----
pointer = new ge1doot.Pointer({
tap: function () {
if (camera.over) {
if (camera.over === camera.target.elem) {
// ---- return to the center ----
camera.target.x = 0;
camera.target.z = 0;
camera.target.elem = false;
} else {
// ---- goto diapo ----
camera.target.elem = camera.over;
camera.target.x = camera.over.tx;
camera.target.z = camera.over.tz;
// ---- adapt tesselation level to distance ----
for (var i = 0, d; d = diapo[i++]; ) {
var dx = camera.target.x - d.pc.x;
var dz = camera.target.z - d.pc.z;
var dist = Math.sqrt(dx * dx + dz * dz);
var lev = (dist > 1500) ? quality[0] : quality[1];
d.img.setLevel(lev);
}
}
}
}
});
// ---- init camera ----
camera = new ge1doot.transform3D.Camera({
focalLength: Math.sqrt(scr.width) * 10,
easeTranslation: 0.025,
easeRotation: 0.06,
disableRz: true
}, {
move: function () {
this.over = false;
// ---- rotation ----
if (pointer.isDraging) {
this.target.elem = false;
this.target.ry = -pointer.Xi * 0.01;
this.target.rx = (pointer.Y - scr.height * 0.5) / (scr.height * 0.5);
} else {
if (this.target.elem) {
this.target.ry = Math.atan2(
this.target.elem.pc.x - this.x,
this.target.elem.pc.z - this.z
);
}
}
this.target.rx *= 0.9;
}
});
camera.z = -10000;
camera.py = 0;
// ---- create images ----
for (var i = 0, img; img = json.imgdata[i++]; ) {
diapo.push(
new Diapo(
json.options.imagesPath,
img,
json.structure
)
);
}
// ---- start engine ---- >>>
setInterval(function () {
quality = (fps > 50) ? [2, 3] : [1, 2];
fps = 0;
}, 1000);
run();
},
// ---- main loop ----
run = function () {
// ---- clear screen ----
ctx.clearRect(0, 0, scr.width, scr.height);
// ---- camera ----
camera.move();
// ---- draw layers ----
for (var k = -1, l; l = layers[++k]; ) {
light = false;
for (var i = 0, d; d = diapo[i++]; ) {
(l === 1 && d.draw()) ||
(d.visible && d.poly[k].draw());
}
}
// ---- cursor ----
if (camera.over && !pointer.isDraging) {
scr.setCursor("pointer");
} else {
scr.setCursor("move");
}
// ---- loop ----
fps++;
requestAnimFrame(run);
};
/* ==== prototypes ==== */
Poly.prototype.draw = function () {
// ---- color light ----
var c = this.color;
if (c.light || !light) {
var s = c.light ? this.parent.light : 1;
// ---- rgba color ----
light = "rgba(" +
Math.round(c.r * s) + "," +
Math.round(c.g * s) + "," +
Math.round(c.b * s) + "," + (c.a || 1) + ")";
ctx.fillStyle = light;
}
// ---- paint poly ----
if (!c.light || this.parent.light < 1) {
// ---- projection ----
for (
var i = 0;
this.points[i++].projection();
);
this.drawPoly();
ctx.fill();
}
}
/* ==== image onload ==== */
Diapo.prototype.loaded = function (img) {
// ---- create points ----
var d = [-1, 1, 1, -1, 1, 1, -1, -1];
var w = img.texture.width * 0.5;
var h = img.texture.height * 0.5;
for (var i = 0; i < 4; i++) {
img.points[i] = new ge1doot.transform3D.Point(
this.pc.x + (w * this.normalZ * d[i]),
this.pc.y + (h * d[i + 4]),
this.pc.z + (w * this.normalX * d[i])
);
}
}
/* ==== images draw ==== */
Diapo.prototype.draw = function () {
// ---- visibility ----
this.pc.projection();
if (this.pc.Z > -(camera.focalLength >> 1) && this.img.transform3D(true)) {
// ---- light ----
this.light = 0.5 + Math.abs(this.normalZ * camera.cosY - this.normalX * camera.sinY) * 0.6;
// ---- draw image ----
this.visible = true;
this.img.draw();
// ---- test pointer inside ----
if (pointer.hasMoved || pointer.isDown) {
if (
this.img.isPointerInside(
pointer.X,
pointer.Y
)
) camera.over = this;
}
} else this.visible = false;
return true;
}
return {
// --- load data ----
load: function (data) {
window.addEventListener('load', function () {
ge1doot.loadJS(
"res/imageTransform3D.js",
init, data
);
}, false);
}
}
})().load({
imgdata: [
// north
{
img: 'imgs/001.jpg', x: -1000, y: 0, z: 1500, nx: 0, nz: 1 },
{
img: 'imgs/002.jpg', x: 0, y: 0, z: 1500, nx: 0, nz: 1 },
{
img: 'imgs/003.jpg', x: 1000, y: 0, z: 1500, nx: 0, nz: 1 },
// east
{
img: 'imgs/004.jpg', x: 1500, y: 0, z: 1000, nx: -1, nz: 0 },
{
img: 'imgs/005.jpg', x: 1500, y: 0, z: 0, nx: -1, nz: 0 },
{
img: 'imgs/006.jpg', x: 1500, y: 0, z: -1000, nx: -1, nz: 0 },
// south
{
img: 'imgs/007.jpg', x: 1000, y: 0, z: -1500, nx: 0, nz: -1 },
{
img: 'imgs/008.jpg', x: 0, y: 0, z: -1500, nx: 0, nz: -1 },
{
img: 'imgs/009.jpg', x: -1000, y: 0, z: -1500, nx: 0, nz: -1 },
// west
{
img: 'imgs/010.jpg', x: -1500, y: 0, z: -1000, nx: 1, nz: 0 },
{
img: 'imgs/011.jpg', x: -1500, y: 0, z: 0, nx: 1, nz: 0 },
{
img: 'imgs/012.jpg', x: -1500, y: 0, z: 1000, nx: 1, nz: 0 }
],
structure: [
{
// wall
fill: {
r: 255, g: 255, b: 255, light: 1 },
x: [-1001, -490, -490, -1001],
z: [-500, -500, -500, -500],
y: [500, 500, -500, -500]
}, {
// wall
fill: {
r: 255, g: 255, b: 255, light: 1 },
x: [-501, 2, 2, -500],
z: [-500, -500, -500, -500],
y: [500, 500, -500, -500]
}, {
// wall
fill: {
r: 255, g: 255, b: 255, light: 1 },
x: [0, 502, 502, 0],
z: [-500, -500, -500, -500],
y: [500, 500, -500, -500]
}, {
// wall
fill: {
r: 255, g: 255, b: 255, light: 1 },
x: [490, 1002, 1002, 490],
z: [-500, -500, -500, -500],
y: [500, 500, -500, -500]
}, {
// shadow
fill: {
r: 0, g: 0, b: 0, a: 0.2 },
x: [-420, 420, 420, -420],
z: [-500, -500, -500, -500],
y: [150, 150, -320, -320]
}, {
// shadow
fill: {
r: 0, g: 0, b: 0, a: 0.2 },
x: [-20, 20, 20, -20],
z: [-500, -500, -500, -500],
y: [250, 250, 150, 150]
}, {
// shadow
fill: {
r: 0, g: 0, b: 0, a: 0.2 },
x: [-20, 20, 20, -20],
z: [-500, -500, -500, -500],
y: [-320, -320, -500, -500]
}, {
// shadow
fill: {
r: 0, g: 0, b: 0, a: 0.2 },
x: [-20, 20, 10, -10],
z: [-500, -500, -100, -100],
y: [-500, -500, -500, -500]
}, {
// base
fill: {
r: 32, g: 32, b: 32 },
x: [-50, 50, 50, -50],
z: [-150, -150, -50, -50],
y: [-500, -500, -500, -500]
}, {
// support
fill: {
r: 16, g: 16, b: 16 },
x: [-10, 10, 10, -10],
z: [-100, -100, -100, -100],
y: [300, 300, -500, -500]
}, {
// frame
fill: {
r: 255, g: 255, b: 255 },
x: [-320, -320, -320, -320],
z: [0, -20, -20, 0],
y: [-190, -190, 190, 190]
}, {
// frame
fill: {
r: 255, g: 255, b: 255 },
x: [320, 320, 320, 320],
z: [0, -20, -20, 0],
y: [-190, -190, 190, 190]
},
{
img: true },
{
// ceilingLight
fill: {
r: 255, g: 128, b: 0 },
x: [-50, 50, 50, -50],
z: [450, 450, 550, 550],
y: [500, 500, 500, 500]
}, {
// groundLight
fill: {
r: 255, g: 128, b: 0 },
x: [-50, 50, 50, -50],
z: [450, 450, 550, 550],
y: [-500, -500, -500, -500]
}
],
options: {
imagesPath: ""
}
});
</script>
</head>
<body>
<a href="https://blog.csdn.net/fyfugoyfa/article/details/108845194" target="_blank">CSDN文章</a><br />
<canvas id="canvas">建议用谷歌浏览器打开</canvas>
</body>
</html>
2. CSS代码
#icon {
background: rgb(255, 144, 0); border-radius: 6px 0px 0px; transition:0.6s ease-in-out; left: 65px; top: 6px; width: 40px; height: 40px; overflow: hidden; position: relative; cursor: pointer; -moz-transition: all 0.6s ease-in-out 0s; -webkit-transition: all 0.6s ease-in-out 0s; -o-transition: all 0.6s ease-in-out 0s;
}
#icon div {
background: none; position: absolute;
}
#icon div:nth-child(1) {
border-width: 7px 0px 7px 8px; border-style: solid; border-color: transparent rgb(255, 255, 255); left: 20px; top: 50%; width: 0px; height: 0px; margin-top: -7px; position: absolute;
}
#icon div:nth-child(2) {
background: rgb(255, 255, 255); left: 12px; top: 50%; width: 8px; height: 6px; margin-top: -3px; position: absolute;
}
#nav {
top: 10px; width: 100px; height: 0px; position: absolute; -ms-user-select: none; -webkit-user-select: none; -moz-user-select: none;
}
#nav-switch {
display: none;
}
#nav .label {
display: block; cursor: pointer;
}
#nav .container {
transition:left 0.3s ease-in-out; left: -100px; width: 100%; position: absolute; -moz-transition: left 0.3s ease-in-out 0s; -webkit-transition: left 0.3s ease-in-out 0s; -o-transition: left 0.3s ease-in-out 0s;
}
#nav .container > div {
padding: 0px; width: 50%; float: left;
}
#nav .container .nav-on {
color: rgb(51, 51, 51); padding-left: 0px;
}
#nav .container .nav-off {
width: 40px; height: 40px; padding-right: 10px;
}
:checked#nav-switch + .label .container {
left: 10px;
}
:checked#nav-switch + .label #icon {
background: rgb(0, 101, 203); border-radius: 0px 0px 6px; transform: rotate(-180deg); -webkit-transform: rotate(-180deg); -moz-transform: rotate(-180deg); -o-transform: rotate(-180deg);
}
.title {
margin: 0px; padding: 0px; left: 170px; top: 2px; height: 40px; color: rgb(51, 51, 51); line-height: 40px; font-family: "Segoe UI Light", "Segoe UI", Frutiger, "Frutiger Linotype", "Dejavu Sans", "Helvetica Neue", Arial, sans-serif; font-size: 24px; font-weight: bold; white-space: nowrap; position: absolute; -ms-user-select: none; -webkit-user-select: none; -moz-user-select: none; -o-user-select: none; user-select: none;
}
.menu {
margin: 0px; padding: 0px; left: 0px; top: 6px; color: rgb(51, 51, 51); font-family: "Segoe UI Light", "Segoe UI", Frutiger, "Frutiger Linotype", "Dejavu Sans", "Helvetica Neue", Arial, sans-serif; font-size: 1em; font-weight: lighter; list-style-type: none; position: relative; cursor: pointer;
}
.menu li {
list-style: none; width: 100px; height: 40px; border-right-color: rgb(221, 221, 221); border-right-width: 1px; border-right-style: solid; position: relative; cursor: pointer;
}
.menu a {
color: rgb(51, 51, 51); line-height: 40px; padding-left: 40px; text-decoration: none; display: block; position: relative;
}
.menu li a:hover {
background: rgb(255, 144, 0);
}
.menu li a:focus {
background: rgb(255, 144, 0);
}
.menu li a:active {
background: rgb(255, 144, 0);
}
#nav li::before {
top: 50%; margin-left: 10px; position: absolute; content: "";
}
#nav li::after {
top: 50%; margin-left: 10px; position: absolute; content: "";
}
#nav li a::before {
top: 50%; margin-left: 10px; position: absolute; content: "";
}
#nav li a::after {
top: 50%; margin-left: 10px; position: absolute; content: "";
}
#nav .home a::before {
border-width: 8px 7px; border-style: solid; border-color: transparent transparent rgb(51, 51, 51); left: 2px; margin-top: -16px;
}
#nav .home a::after {
border-width: 3px 4px 0px; border-style: solid; border-color: rgb(51, 51, 51) rgb(51, 51, 51) transparent; left: 4px; width: 2px; height: 4px; margin-top: 0px;
}
#nav .arrow a::before {
border-width: 7px 0px 7px 8px; border-style: solid; border-color: transparent rgb(51, 51, 51); left: 8px; margin-top: -7px;
}
#nav .arrow a::after {
background: rgb(51, 51, 51); left: 0px; width: 8px; height: 6px; margin-top: -3px;
}
#nav .back.arrow a::before {
border-width: 7px 8px 7px 0px; left: 0px;
}
#nav .back.arrow a::after {
left: 8px;
}
#nav .list a::before {
background: none; border-width: 6px 0px; border-style: double; border-color: rgb(51, 51, 51); left: 5px; top: 14px; width: 12px; height: 2px;
}
#nav .list a::after {
background: none; border-width: 6px 0px; border-style: double; border-color: rgb(51, 51, 51); left: 1px; top: 14px; width: 2px; height: 2px;
}
3. JavaScript代码
// ===== ge1doot global ===== js文件1
var ge1doot = ge1doot || {
json: null,
screen: null,
pointer: null,
camera: null,
loadJS: function (url, callback, data) {
if (typeof url == "string") url = [url];
var load = function (src) {
var script = document.createElement("script");
if (callback) {
if (script.readyState){
script.onreadystatechange = function () {
if (script.readyState == "loaded" || script.readyState == "complete"){
script.onreadystatechange = null;
if (--n === 0) callback(data || false);
}
}
} else {
script.onload = function() {
if (--n === 0) callback(data || false);
}
}
}
script.src = src;
document.getElementsByTagName("head")[0].appendChild(script);
}
for (var i = 0, n = url.length; i < n; i++) load(url[i]);
}
}
// ===== html/canvas container =====
ge1doot.Screen = function (setup) {
ge1doot.screen = this;
this.elem = document.getElementById(setup.container) || setup.container;
this.ctx = this.elem.tagName == "CANVAS" ? this.elem.getContext("2d") : false;
this.style = this.elem.style;
this.left = 0;
this.top = 0;
this.width = 0;
this.height = 0;
this.cursor = "default";
this.setup = setup;
this.resize = function () {
var o = this.elem;
this.width = o.offsetWidth;
this.height = o.offsetHeight;
for (this.left = 0, this.top = 0; o != null; o = o.offsetParent) {
this.left += o.offsetLeft;
this.top += o.offsetTop;
}
if (this.ctx) {
this.elem.width = this.width;
this.elem.height = this.height;
}
this.setup.resize && this.setup.resize();
}
this.setCursor = function (type) {
if (type !== this.cursor && 'ontouchstart' in window === false) {
this.cursor = type;
this.style.cursor = type;
}
}
window.addEventListener('resize', function () {
ge1doot.screen.resize();
}, false);
!this.setup.resize && this.resize();
}
// ==== unified touch events handler ====
ge1doot.Pointer = function (setup) {
ge1doot.pointer = this;
var self = this;
var body = document.body;
var html = document.documentElement;
this.setup = setup;
this.screen = ge1doot.screen;
this.elem = this.screen.elem;
this.X = 0;
this.Y = 0;
this.Xi = 0;
this.Yi = 0;
this.bXi = 0;
this.bYi = 0;
this.Xr = 0;
this.Yr = 0;
this.startX = 0;
this.startY = 0;
this.scale = 0;
this.wheelDelta = 0;
this.isDraging = false;
this.hasMoved = false;
this.isDown = false;
this.evt = false;
var sX = 0;
var sY = 0;
// prevent default behavior
if (setup.tap) this.elem.onclick = function () {
return false; }
if (!setup.documentMove) {
document.ontouchmove = function(e) {
e.preventDefault(); }
}
document.addEventListener("MSHoldVisual", function(e) {
e.preventDefault(); }, false);
if (typeof this.elem.style.msTouchAction != 'undefined') this.elem.style.msTouchAction = "none";
this.pointerDown = function (e) {
if (!this.isDown) {
if (this.elem.setCapture) this.elem.setCapture();
this.isDraging = false;
this.hasMoved = false;
this.isDown = true;
this.evt = e;
this.Xr = (e.clientX !== undefined ? e.clientX : e.touches[0].clientX);
this.Yr = (e.clientY !== undefined ? e.clientY : e.touches[0].clientY);
this.X = sX = this.Xr - this.screen.left;
this.Y = sY = this.Yr - this.screen.top + ((html && html.scrollTop) || body.scrollTop);
this.setup.down && this.setup.down(e);
}
}
this.pointerMove = function(e) {
this.Xr = (e.clientX !== undefined ? e.clientX : e.touches[0].clientX);
this.Yr = (e.clientY !== undefined ? e.clientY : e.touches[0].clientY);
this.X = this.Xr - this.screen.left;
this.Y = this.Yr - this.screen.top + ((html && html.scrollTop) || body.scrollTop);
if (this.isDown) {
this.Xi = this.bXi + (this.X - sX);
this.Yi = this.bYi - (this.Y - sY);
}
if (Math.abs(this.X - sX) > 11 || Math.abs(this.Y - sY) > 11) {
this.hasMoved = true;
if (this.isDown) {
if (!this.isDraging) {
this.startX = sX;
this.startY = sY;
this.setup.startDrag && this.setup.startDrag(e);
this.isDraging = true;
} else {
this.setup.drag && this.setup.drag(e);
}
} else {
sX = this.X;
sY = this.Y;
}
}
this.setup.move && this.setup.move(e);
}
this.pointerUp = function(e) {
this.bXi = this.Xi;
this.bYi = this.Yi;
if (!this.hasMoved) {
this.X = sX;
this.Y = sY;
this.setup.tap && this.setup.tap(this.evt);
} else {
this.setup.up && this.setup.up(this.evt);
}
this.isDraging = false;
this.isDown = false;
this.hasMoved = false;
this.setup.up && this.setup.up(this.evt);
if (this.elem.releaseCapture) this.elem.releaseCapture();
this.evt = false;
}
this.pointerCancel = function(e) {
if (this.elem.releaseCapture) this.elem.releaseCapture();
this.isDraging = false;
this.hasMoved = false;
this.isDown = false;
this.bXi = this.Xi;
this.bYi = this.Yi;
sX = 0;
sY = 0;
}
if ('ontouchstart' in window) {
this.elem.ontouchstart = function (e) {
self.pointerDown(e); return false; }
this.elem.ontouchmove = function (e) {
self.pointerMove(e); return false; }
this.elem.ontouchend = function (e) {
self.pointerUp(e); return false; }
this.elem.ontouchcancel = function (e) {
self.pointerCancel(e); return false;}
}
document.addEventListener("mousedown", function (e) {
if (
e.target === self.elem ||
(e.target.parentNode && e.target.parentNode === self.elem) ||
(e.target.parentNode.parentNode && e.target.parentNode.parentNode === self.elem)
) {
if (typeof e.stopPropagation != "undefined") {
e.stopPropagation();
} else {
e.cancelBubble = true;
}
e.preventDefault();
self.pointerDown(e);
}
}, false);
document.addEventListener("mousemove", function (e) {
self.pointerMove(e); }, false);
document.addEventListener("mouseup", function (e) {
self.pointerUp(e);
}, false);
document.addEventListener('gesturechange', function(e) {
e.preventDefault();
if (e.scale > 1) self.scale = 0.1; else if (e.scale < 1) self.scale = -0.1; else self.scale = 0;
self.setup.scale && self.setup.scale(e);
return false;
}, false);
if (window.navigator.msPointerEnabled) {
var nContact = 0;
var myGesture = new MSGesture();
myGesture.target = this.elem;
this.elem.addEventListener("MSPointerDown", function(e) {
if (e.pointerType == e.MSPOINTER_TYPE_TOUCH) {
myGesture.addPointer(e.pointerId);
nContact++;
}
}, false);
this.elem.addEventListener("MSPointerOut", function(e) {
if (e.pointerType == e.MSPOINTER_TYPE_TOUCH) {
nContact--;
}
}, false);
this.elem.addEventListener("MSGestureHold", function(e) {
e.preventDefault();
}, false);
this.elem.addEventListener("MSGestureChange", function(e) {
if (nContact > 1) {
if (e.preventDefault) e.preventDefault();
self.scale = e.velocityExpansion;
self.setup.scale && self.setup.scale(e);
}
return false;
}, false);
}
if (window.addEventListener) this.elem.addEventListener('DOMMouseScroll', function(e) {
if (e.preventDefault) e.preventDefault();
self.wheelDelta = e.detail * 10;
self.setup.wheel && self.setup.wheel(e);
return false;
}, false);
this.elem.onmousewheel = function () {
self.wheelDelta = -event.wheelDelta * .25;
self.setup.wheel && self.setup.wheel(event);
return false;
}
}
// ===== request animation frame =====
window.requestAnimFrame = (function(){
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function( run ){
window.setTimeout(run, 16);
};
})();
/* ====== js文件2 ======= */
"use strict";
var ge1doot = ge1doot || {
};
ge1doot.transform3D = {
};
/* ==== draw Poly ==== */
ge1doot.transform3D.drawPoly = function () {
this.ctx.beginPath();
this.ctx.moveTo(this.points[0].X, this.points[0].Y);
this.ctx.lineTo(this.points[1].X, this.points[1].Y);
this.ctx.lineTo(this.points[2].X, this.points[2].Y);
this.ctx.lineTo(this.points[3].X, this.points[3].Y);
this.ctx.closePath();
}
/* =============== camera constructor ================= */
ge1doot.transform3D.Camera = function (setup, func) {
ge1doot.camera = this;
this.x = 0;
this.y = 0;
this.z = 0;
this.rx = 0;
this.ry = 0;
this.rz = 0;
this.focalLength = setup.focalLength || 500;
this.easeTranslation = setup.easeTranslation || 0.1;
this.easeRotation = setup.easeRotation || 0.025;
this.enableRx = setup.disableRx ? false : true;
this.enableRy = setup.disableRy ? false : true;
this.enableRz = setup.disableRz ? false : true;
this.cmov = false;
this.cosX = 1;
this.sinX = 0;
this.cosY = 1;
this.sinY = 0;
this.cosZ = 1;
this.sinZ = 0;
this.target = {
over: false,
elem: false,
x: 0,
y: 0,
z: 0,
rx: 0,
ry: 0,
rz: 0
};
// ---- def custom move ----
if (func && func.move) this.cmov = func.move;
}
/* ==== easing ==== */
ge1doot.transform3D.Camera.prototype.ease = function (target, value) {
while (Math.abs(target - value) > Math.PI) {
if (target < value) value -= 2 * Math.PI;
else value += 2 * Math.PI;
}
return (target - value) * this.easeRotation;
}
/* ==== move / rotate camera ==== */
ge1doot.transform3D.Camera.prototype.move = function () {
// ---- run custom function ----
this.cmov && this.cmov();
// ---- translations ----
this.x += (this.target.x - this.x) * this.easeTranslation;
this.y += (this.target.y - this.y) * this.easeTranslation;
this.z += (this.target.z - this.z) * this.easeTranslation;
// ---- rotation rx ----
if (this.enableRx) {
this.rx += this.ease(this.target.rx, this.rx);
this.cosX = Math.cos(this.rx);
this.sinX = Math.sin(this.rx);
}
// ---- rotation ry ----
if (this.enableRy) {
this.ry += this.ease(this.target.ry, this.ry);
this.cosY = Math.cos(this.ry);
this.sinY = Math.sin(this.ry);
}
// ---- rotation rz ----
if (this.enableRz) {
this.rz += this.ease(this.target.rz, this.rz);
this.cosZ = Math.cos(this.rz);
this.sinZ = Math.sin(this.rz);
}
}
/* =============== point constructor ================= */
ge1doot.transform3D.Point = function (x, y, z, tx, ty) {
this.x = x;
this.y = y;
this.z = z;
this.tx = tx || 0;
this.ty = ty || 0;
this.visible = false;
this.scale = 0;
this.X = 0;
this.Y = 0;
this.Z = 0;
this.next = true;
}
/* ==== perspective projection ==== */
ge1doot.transform3D.Point.prototype.projection = function () {
var sw = this.scr.width >> 1;
var sh = this.scr.height >> 1;
// ---- 3D coordinates ----
var nx = this.x - this.camera.x;
var ny = this.y - this.camera.y;
var nz = this.z - this.camera.z;
// ---- 3D rotation and projection ----
if (this.camera.enableRz) {
var u = this.camera.sinZ * ny + this.camera.cosZ * nx;
var t = this.camera.cosZ * ny - this.camera.sinZ * nx;
} else {
var u = nx;
var t = ny;
}
var s = this.camera.cosY * nz + this.camera.sinY * u;
this.Z = this.camera.cosX * s - this.camera.sinX * t;
this.scale = this.camera.focalLength / Math.max(1, this.Z);
this.X = sw + (this.camera.cosY * u - this.camera.sinY * nz) * this.scale;
this.Y = -(this.camera.y >> 1) + sh - (this.camera.sinX * s + this.camera.cosX * t) * this.scale;
// ---- visibility test ----
this.visible = (
this.X > -sw * 0.5 && this.X < sw * 2.5
) && (
this.Y > -sh * 0.5 && this.Y < sh * 2.5
);
// ----return next (fast loop) ----
return this.next;
}
/* ==== triangle constructor ==== */
ge1doot.transform3D.Triangle = function (parent, p0, p1, p2) {
this.ctx = parent.ctx;
this.texture = parent.texture;
this.p0 = p0;
this.p1 = p1;
this.p2 = p2;
this.d = p0.tx * (p2.ty - p1.ty) - p1.tx * p2.ty + p2.tx * p1.ty + (p1.tx - p2.tx) * p0.ty;
this.pmy = p1.ty - p2.ty;
this.pmx = p1.tx - p2.tx;
this.pxy = p2.tx * p1.ty - p1.tx * p2.ty;
if (parent.t) parent.t.next = true;
}
/* ==== draw triangle ==== */
ge1doot.transform3D.Triangle.prototype.draw = function () {
if (this.p0.visible || this.p1.visible || this.p2.visible) {
var dx, dy, d;
// ---- centroid ----
var xc = (this.p0.X + this.p1.X + this.p2.X) / 3;
var yc = (this.p0.Y + this.p1.Y + this.p2.Y) / 3;
// ---- clipping ----
this.ctx.save();
this.ctx.beginPath();
dx = xc - this.p0.X;
dy = yc - this.p0.Y;
d = Math.max(Math.abs(dx), Math.abs(dy));
this.ctx.moveTo(this.p0.X - 2 * (dx / d), this.p0.Y - 2 * (dy / d));
dx = xc - this.p1.X;
dy = yc - this.p1.Y;
d = Math.max(Math.abs(dx), Math.abs(dy));
this.ctx.lineTo(this.p1.X - 2 * (dx / d), this.p1.Y - 2 * (dy / d));
dx = xc - this.p2.X;
dy = yc - this.p2.Y;
d = Math.max(Math.abs(dx), Math.abs(dy));
this.ctx.lineTo(this.p2.X - 2 * (dx / d), this.p2.Y - 2 * (dy / d));
this.ctx.closePath();
this.ctx.clip();
// ---- transform ----
var t0 = this.p2.X - this.p1.X,
t1 = this.p1.Y - this.p2.Y,
t2 = this.p2.ty * this.p1.X,
t3 = this.p1.tx * this.p2.X,
t4 = this.p2.ty * this.p1.Y,
t5 = this.p1.ty * this.p2.X,
t6 = this.p1.ty * this.p2.Y,
t7 = this.p2.tx * this.p1.X,
t8 = this.p1.tx * this.p2.Y,
t9 = this.p2.tx * this.p1.Y;
this.ctx.transform(
-(this.p0.ty * t0 - t5 + t2 + this.pmy * this.p0.X) / this.d, // m11
(t6 + this.p0.ty * t1 - t4 - this.pmy * this.p0.Y) / this.d, // m12
(this.p0.tx * t0 - t3 + t7 + this.pmx * this.p0.X) / this.d, // m21
-(t8 + this.p0.tx * t1 - t9 - this.pmx * this.p0.Y) / this.d, // m22
(this.p0.tx * (t2 - t5) + this.p0.ty * (t3 - t7) + this.pxy * this.p0.X) / this.d, // dx
(this.p0.tx * (t4 - t6) + this.p0.ty * (t8 - t9) + this.pxy * this.p0.Y) / this.d // dy
);
// ---- draw ----
this.ctx.drawImage(this.texture, 0, 0);
this.ctx.restore();
}
return this.next;
}
/* ===================== image constructor ========================== */
ge1doot.transform3D.Image = function (parent, imgSrc, lev, callback) {
this.parent = parent;
this.points = [];
this.triangles = [];
this.ctx = ge1doot.screen.ctx;
this.pointer = ge1doot.pointer;
this.texture = new Image();
this.texture.src = imgSrc;
this.isLoading = true;
this.callback = callback;
this.textureWidth = 0;
this.textureHeight = 0;
this.level = lev || 1;
this.visible = false;
this.t = false;
if (!ge1doot.transform3D.Point.prototype.scr) {
ge1doot.transform3D.Point.prototype.scr = ge1doot.screen;
ge1doot.transform3D.Point.prototype.camera = ge1doot.camera;
}
}
/* ==== drawPoly prototype ==== */
ge1doot.transform3D.Image.prototype.drawPoly = ge1doot.transform3D.drawPoly;
/* ==== change tessellation level prototype ==== */
ge1doot.transform3D.Image.prototype.setLevel = function (level) {
this.points.length = 0;
this.triangles.length = 0;
this.level = level;
this.loading();
}
/* ==== loading prototype ==== */
ge1doot.transform3D.Image.prototype.loading = function () {
if (this.texture.complete) {
var dir = [0,1,1,0,0,0,1,1];
this.isLoading = false;
// ---- image size ----
this.textureWidth = this.texture.width;
this.textureHeight = this.texture.height;
// ---- isLoaded callback ---
this.callback && this.callback.isLoaded && this.callback.isLoaded(this);
// ---- texture position ----
for (var i = -1, p; p = this.points[++i];) {
p.tx = this.textureWidth * dir[i];
p.ty = this.textureHeight * dir[i+4];
}
// ---- triangularization ----
this.triangulate(this.points[0], this.points[1], this.points[2], this.level);
this.triangulate(this.points[0], this.points[2], this.points[3], this.level);
// ---- last point ----
this.points[this.points.length - 1].next = false;
}
}
/* ==== vector bisection function ==== */
ge1doot.transform3D.Image.prototype.subdivise = function (p0, p1) {
return {
x: (p1.x + p0.x) * 0.5,
y: (p1.y + p0.y) * 0.5,
z: (p1.z + p0.z) * 0.5,
tx: (p1.tx + p0.tx) * 0.5,
ty: (p1.ty + p0.ty) * 0.5
};
}
/* ==== triangulation ==== */
ge1doot.transform3D.Image.prototype.triangulate = function (p0, p1, p2, level) {
level--;
if (level === 0) {
// final triangle
this.t = new ge1doot.transform3D.Triangle(this, p0, p1, p2);
this.triangles.push(this.t);
} else {
// ---- subdivision ----
var p01 = this.subdivise(p0, p1);
var p12 = this.subdivise(p1, p2);
var p20 = this.subdivise(p2, p0);
// ---- insert new points ----
this.points.push(p01 = new ge1doot.transform3D.Point(p01.x, p01.y, p01.z, p01.tx, p01.ty));
this.points.push(p12 = new ge1doot.transform3D.Point(p12.x, p12.y, p12.z, p12.tx, p12.ty));
this.points.push(p20 = new ge1doot.transform3D.Point(p20.x, p20.y, p20.z, p20.tx, p20.ty));
// ---- recursive triangulation ----
this.triangulate(p0, p01, p20, level);
this.triangulate(p01, p1, p12, level);
this.triangulate(p20, p12, p2, level);
this.triangulate(p01, p12, p20, level);
}
}
/* ==== transform prototype ==== */
ge1doot.transform3D.Image.prototype.transform3D = function (backfaceTest) {
if (this.isLoading) {
// ---- image is loading ----
this.loading();
return false;
} else {
// ---- project points ----
for (
var i = 0;
this.points[i++].projection();
);
if (backfaceTest) {
var p0 = this.points[0];
var p1 = this.points[1];
var p2 = this.points[2];
return (
((p1.Y - p0.Y) / (p1.X - p0.X) -
(p2.Y - p0.Y) / (p2.X - p0.X) < 0) ^
(p0.X <= p1.X == p0.X > p2.X)
);
} else return true;
}
}
/* ==== draw prototype ==== */
ge1doot.transform3D.Image.prototype.draw = function () {
if (!this.isLoading) {
// ---- draw triangles ----
for (
var i = 0;
this.triangles[i++].draw();
);
}
}
/* ==== isPointerInside prototype ==== */
ge1doot.transform3D.Image.prototype.isPointerInside = function (x, y) {
this.drawPoly(this.points);
return this.ctx.isPointInPath(x, y);
}
作者：叶庭云
公众号：微信搜一搜【修炼Python】 分享学习文档、教程资料和简历模板
CSDN：https://yetingyun.blog.csdn.net/
本文仅用于交流学习，未经作者允许，禁止转载，更勿做其他用途，违者必究。
热爱可抵岁月漫长，发现求知的乐趣，在不断总结和学习中进步，与诸君共勉。
转载：https://blog.csdn.net/fyfugoyfa/article/details/108845194
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