<!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="圖片3D展覽屋">
<meta name="keywords" content="canvas,3D_picture,perspective,texturing,gallery">
<link href="res/slider-wb.css" rel="stylesheet">
<title>圖片3D展覽屋</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">建議用谷歌瀏覽器打開</canvas>
</body>
</html>
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