353 lines
8.8 KiB
HTML
353 lines
8.8 KiB
HTML
<html><head>
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<meta charset="utf-8">
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<title>www.husonghe.com</title>
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<style>
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html {
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height: 100%;
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background-image: -webkit-radial-gradient(ellipse farthest-corner at center center, #1b44e4 0%, #020f3a 100%);
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background-image: radial-gradient(ellipse farthest-corner at center center, #1b44e4 0%, #020f3a 100%);
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cursor: move;
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}
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body {
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width: 100%;
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margin: 0;
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overflow: hidden;
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}
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</style>
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</head>
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<body>
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<canvas id="canv" width="1920" height="572"></canvas>
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<script>
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var num = 200;
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var w = window.innerWidth;
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var h = window.innerHeight;
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var max = 100;
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var _x = 0;
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var _y = 0;
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var _z = 150;
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var dtr = function(d) {
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return d * Math.PI / 180;
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};
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var rnd = function() {
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return Math.sin(Math.floor(Math.random() * 360) * Math.PI / 180);
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};
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var dist = function(p1, p2, p3) {
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return Math.sqrt(Math.pow(p2.x - p1.x, 2) + Math.pow(p2.y - p1.y, 2) + Math.pow(p2.z - p1.z, 2));
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};
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var cam = {
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obj: {
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x: _x,
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y: _y,
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z: _z
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},
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dest: {
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x: 0,
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y: 0,
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z: 1
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},
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dist: {
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x: 0,
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y: 0,
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z: 200
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},
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ang: {
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cplane: 0,
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splane: 0,
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ctheta: 0,
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stheta: 0
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},
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zoom: 1,
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disp: {
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x: w / 2,
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y: h / 2,
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z: 0
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},
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upd: function() {
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cam.dist.x = cam.dest.x - cam.obj.x;
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cam.dist.y = cam.dest.y - cam.obj.y;
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cam.dist.z = cam.dest.z - cam.obj.z;
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cam.ang.cplane = -cam.dist.z / Math.sqrt(cam.dist.x * cam.dist.x + cam.dist.z * cam.dist.z);
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cam.ang.splane = cam.dist.x / Math.sqrt(cam.dist.x * cam.dist.x + cam.dist.z * cam.dist.z);
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cam.ang.ctheta = Math.sqrt(cam.dist.x * cam.dist.x + cam.dist.z * cam.dist.z) / Math.sqrt(cam.dist.x * cam.dist.x + cam.dist.y * cam.dist.y + cam.dist.z * cam.dist.z);
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cam.ang.stheta = -cam.dist.y / Math.sqrt(cam.dist.x * cam.dist.x + cam.dist.y * cam.dist.y + cam.dist.z * cam.dist.z);
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}
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};
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var trans = {
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parts: {
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sz: function(p, sz) {
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return {
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x: p.x * sz.x,
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y: p.y * sz.y,
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z: p.z * sz.z
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};
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},
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rot: {
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x: function(p, rot) {
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return {
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x: p.x,
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y: p.y * Math.cos(dtr(rot.x)) - p.z * Math.sin(dtr(rot.x)),
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z: p.y * Math.sin(dtr(rot.x)) + p.z * Math.cos(dtr(rot.x))
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};
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},
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y: function(p, rot) {
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return {
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x: p.x * Math.cos(dtr(rot.y)) + p.z * Math.sin(dtr(rot.y)),
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y: p.y,
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z: -p.x * Math.sin(dtr(rot.y)) + p.z * Math.cos(dtr(rot.y))
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};
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},
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z: function(p, rot) {
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return {
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x: p.x * Math.cos(dtr(rot.z)) - p.y * Math.sin(dtr(rot.z)),
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y: p.x * Math.sin(dtr(rot.z)) + p.y * Math.cos(dtr(rot.z)),
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z: p.z
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};
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}
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},
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pos: function(p, pos) {
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return {
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x: p.x + pos.x,
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y: p.y + pos.y,
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z: p.z + pos.z
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};
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}
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},
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pov: {
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plane: function(p) {
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return {
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x: p.x * cam.ang.cplane + p.z * cam.ang.splane,
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y: p.y,
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z: p.x * -cam.ang.splane + p.z * cam.ang.cplane
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};
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},
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theta: function(p) {
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return {
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x: p.x,
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y: p.y * cam.ang.ctheta - p.z * cam.ang.stheta,
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z: p.y * cam.ang.stheta + p.z * cam.ang.ctheta
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};
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},
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set: function(p) {
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return {
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x: p.x - cam.obj.x,
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y: p.y - cam.obj.y,
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z: p.z - cam.obj.z
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};
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}
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},
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persp: function(p) {
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return {
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x: p.x * cam.dist.z / p.z * cam.zoom,
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y: p.y * cam.dist.z / p.z * cam.zoom,
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z: p.z * cam.zoom,
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p: cam.dist.z / p.z
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};
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},
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disp: function(p, disp) {
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return {
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x: p.x + disp.x,
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y: -p.y + disp.y,
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z: p.z + disp.z,
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p: p.p
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};
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},
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steps: function(_obj_, sz, rot, pos, disp) {
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var _args = trans.parts.sz(_obj_, sz);
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_args = trans.parts.rot.x(_args, rot);
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_args = trans.parts.rot.y(_args, rot);
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_args = trans.parts.rot.z(_args, rot);
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_args = trans.parts.pos(_args, pos);
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_args = trans.pov.plane(_args);
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_args = trans.pov.theta(_args);
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_args = trans.pov.set(_args);
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_args = trans.persp(_args);
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_args = trans.disp(_args, disp);
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return _args;
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}
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};
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(function() {
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"use strict";
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var threeD = function(param) {
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this.transIn = {};
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this.transOut = {};
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this.transIn.vtx = (param.vtx);
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this.transIn.sz = (param.sz);
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this.transIn.rot = (param.rot);
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this.transIn.pos = (param.pos);
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};
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threeD.prototype.vupd = function() {
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this.transOut = trans.steps(
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this.transIn.vtx,
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this.transIn.sz,
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this.transIn.rot,
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this.transIn.pos,
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cam.disp
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);
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};
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var Build = function() {
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this.vel = 0.04;
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this.lim = 360;
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this.diff = 200;
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this.initPos = 100;
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this.toX = _x;
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this.toY = _y;
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this.go();
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};
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Build.prototype.go = function() {
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this.canvas = document.getElementById("canv");
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this.canvas.width = window.innerWidth;
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this.canvas.height = window.innerHeight;
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this.$ = canv.getContext("2d");
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this.$.globalCompositeOperation = 'source-over';
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this.varr = [];
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this.dist = [];
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this.calc = [];
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for (var i = 0, len = num; i < len; i++) {
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this.add();
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}
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this.rotObj = {
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x: 0,
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y: 0,
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z: 0
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};
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this.objSz = {
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x: w / 5,
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y: h / 5,
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z: w / 5
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};
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};
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Build.prototype.add = function() {
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this.varr.push(new threeD({
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vtx: {
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x: rnd(),
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y: rnd(),
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z: rnd()
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},
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sz: {
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x: 0,
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y: 0,
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z: 0
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},
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rot: {
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x: 20,
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y: -20,
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z: 0
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},
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pos: {
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x: this.diff * Math.sin(360 * Math.random() * Math.PI / 180),
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y: this.diff * Math.sin(360 * Math.random() * Math.PI / 180),
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z: this.diff * Math.sin(360 * Math.random() * Math.PI / 180)
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}
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}));
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this.calc.push({
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x: 360 * Math.random(),
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y: 360 * Math.random(),
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z: 360 * Math.random()
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});
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};
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Build.prototype.upd = function() {
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cam.obj.x += (this.toX - cam.obj.x) * 0.05;
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cam.obj.y += (this.toY - cam.obj.y) * 0.05;
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};
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Build.prototype.draw = function() {
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this.$.clearRect(0, 0, this.canvas.width, this.canvas.height);
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cam.upd();
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this.rotObj.x += 0.1;
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this.rotObj.y += 0.1;
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this.rotObj.z += 0.1;
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for (var i = 0; i < this.varr.length; i++) {
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for (var val in this.calc[i]) {
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if (this.calc[i].hasOwnProperty(val)) {
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this.calc[i][val] += this.vel;
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if (this.calc[i][val] > this.lim) this.calc[i][val] = 0;
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}
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}
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this.varr[i].transIn.pos = {
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x: this.diff * Math.cos(this.calc[i].x * Math.PI / 180),
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y: this.diff * Math.sin(this.calc[i].y * Math.PI / 180),
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z: this.diff * Math.sin(this.calc[i].z * Math.PI / 180)
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};
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this.varr[i].transIn.rot = this.rotObj;
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this.varr[i].transIn.sz = this.objSz;
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this.varr[i].vupd();
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if (this.varr[i].transOut.p < 0) continue;
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var g = this.$.createRadialGradient(this.varr[i].transOut.x, this.varr[i].transOut.y, this.varr[i].transOut.p, this.varr[i].transOut.x, this.varr[i].transOut.y, this.varr[i].transOut.p * 2);
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this.$.globalCompositeOperation = 'lighter';
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g.addColorStop(0, 'hsla(255, 255%, 255%, 1)');
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g.addColorStop(.5, 'hsla(' + (i + 2) + ',85%, 40%,1)');
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g.addColorStop(1, 'hsla(' + (i) + ',85%, 40%,.5)');
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this.$.fillStyle = g;
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this.$.beginPath();
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this.$.arc(this.varr[i].transOut.x, this.varr[i].transOut.y, this.varr[i].transOut.p * 2, 0, Math.PI * 2, false);
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this.$.fill();
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this.$.closePath();
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}
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};
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Build.prototype.anim = function() {
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window.requestAnimationFrame = (function() {
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return window.requestAnimationFrame ||
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function(callback, element) {
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window.setTimeout(callback, 1000 / 60);
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};
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})();
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var anim = function() {
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this.upd();
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this.draw();
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window.requestAnimationFrame(anim);
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}.bind(this);
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window.requestAnimationFrame(anim);
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};
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Build.prototype.run = function() {
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this.anim();
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window.addEventListener('mousemove', function(e) {
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this.toX = (e.clientX - this.canvas.width / 2) * -0.8;
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this.toY = (e.clientY - this.canvas.height / 2) * 0.8;
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}.bind(this));
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window.addEventListener('touchmove', function(e) {
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e.preventDefault();
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this.toX = (e.touches[0].clientX - this.canvas.width / 2) * -0.8;
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this.toY = (e.touches[0].clientY - this.canvas.height / 2) * 0.8;
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}.bind(this));
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window.addEventListener('mousedown', function(e) {
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for (var i = 0; i < 100; i++) {
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this.add();
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}
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}.bind(this));
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window.addEventListener('touchstart', function(e) {
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e.preventDefault();
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for (var i = 0; i < 100; i++) {
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this.add();
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}
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}.bind(this));
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};
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var app = new Build();
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app.run();
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})();
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// window.addEventListener('resize', function() {
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// canvas.width = w = window.innerWidth;
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// canvas.height = h = window.innerHeight;
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// }, false);
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</script>
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</body></html> |