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8 lines
74 KiB
8 lines
74 KiB
5 years ago
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var THREE=THREE||{};if(!self.Int32Array)self.Int32Array=Array,self.Float32Array=Array;THREE.Color=function(a){a!==void 0&&this.setHex(a);return this};THREE.Color.prototype={constructor:THREE.Color,r:1,g:1,b:1,copy:function(a){this.r=a.r;this.g=a.g;this.b=a.b;return this},copyGammaToLinear:function(a){this.r=a.r*a.r;this.g=a.g*a.g;this.b=a.b*a.b;return this},copyLinearToGamma:function(a){this.r=Math.sqrt(a.r);this.g=Math.sqrt(a.g);this.b=Math.sqrt(a.b);return this},setRGB:function(a,b,c){this.r=a;this.g=b;this.b=c;return this},setHSV:function(a,b,c){var d,f,e;if(c===0)this.r=this.g=this.b=0;else switch(d=Math.floor(a*6),f=a*6-d,a=c*(1-b),e=c*(1-b*f),b=c*(1-b*(1-f)),d){case 1:this.r=e;this.g=c;this.b=a;break;case 2:this.r=a;this.g=c;this.b=b;break;case 3:this.r=a;this.g=e;this.b=c;break;case 4:this.r=b;this.g=a;this.b=c;break;case 5:this.r=c;this.g=a;this.b=e;break;case 6:case 0:this.r=c,this.g=b,this.b=a}return this},setHex:function(a){a=Math.floor(a);this.r=(a>>16&255)/255;this.g=(a>>8&255)/255;this.b=(a&255)/255;return this},getHex:function(){return~~(this.r*255)<<16^~~(this.g*255)<<8^~~(this.b*255)},getContextStyle:function(){return"rgb("+Math.floor(this.r*255)+","+Math.floor(this.g*255)+","+Math.floor(this.b*255)+")"},clone:function(){return(new THREE.Color).setRGB(this.r,this.g,this.b)}};THREE.Vector2=function(a,b){this.x=a||0;this.y=b||0};THREE.Vector2.prototype={constructor:THREE.Vector2,set:function(a,b){this.x=a;this.y=b;return this},copy:function(a){this.x=a.x;this.y=a.y;return this},clone:function(){return new THREE.Vector2(this.x,this.y)},add:function(a,b){this.x=a.x+b.x;this.y=a.y+b.y;return this},addSelf:function(a){this.x+=a.x;this.y+=a.y;return this},sub:function(a,b){this.x=a.x-b.x;this.y=a.y-b.y;return this},subSelf:function(a){this.x-=a.x;this.y-=a.y;return this},multiplyScalar:function(a){this.x*=a;this.y*=a;return this},divideScalar:function(a){a?(this.x/= a, this.y /=a):this.set(0,0);return this},negate:function(){return this.multiplyScalar(-1)},dot:function(a){return this.x*a.x+this.y*a.y},lengthSq:function(){return this.x*this.x+this.y*this.y},length:function(){return Math.sqrt(this.lengthSq())},normalize:function(){return this.divideScalar(this.length())},distanceTo:function(a){return Math.sqrt(this.distanceToSquared(a))},distanceToSquared:function(a){var b=this.x-a.x,a=this.y-a.y;return b*b+a*a},setLength:function(a){return this.normalize().multiplyScalar(a)},equals:function(a){return a.x===this.x&&a.y===this.y}};THREE.Vector3=function(a,b,c){this.x=a||0;this.y=b||0;this.z=c||0};THREE.Vector3.prototype={constructor:THREE.Vector3,set:function(a,b,c){this.x=a;this.y=b;this.z=c;return this},setX:function(a){this.x=a;return this},setY:function(a){this.y=a;return this},setZ:function(a){this.z=a;return this},copy:function(a){this.x=a.x;this.y=a.y;this.z=a.z;return this},clone:function(){return new THREE.Vector3(this.x,this.y,this.z)},add:function(a,b){this.x=a.x+b.x;this.y=a.y+b.y;this.z=a.z+b.z;return this},addSelf:function(a){this.x+=a.x;this.y+=a.y;this.z+=a.z;return this},addScalar:function(a){this.x+=a;this.y+=a;this.z+=a;return this},sub:function(a,b){this.x=a.x-b.x;this.y=a.y-b.y;this.z=a.z-b.z;return this},subSelf:function(a){this.x-=a.x;this.y-=a.y;this.z-=a.z;return this},multiply:function(a,b){this.x=a.x*b.x;this.y=a.y*b.y;this.z=a.z*b.z;return this},multiplySelf:function(a){this.x*=a.x;this.y*=a.y;this.z*=a.z;return this},multiplyScalar:function(a){this.x*=a;this.y*=a;this.z*=a;return this},divideSelf:function(a){this.x/=a.x;this.y/=a.y;this.z/=a.z;return this},divideScalar:function(a){a?(this.x/= a, this.y /=a,this.z/=a):this.z=this.y=this.x=0;return this},negate:function(){return this.multiplyScalar(-1)},dot:function(a){return this.x*a.x+this.y*a.y+this.z*a.z},lengthSq:function(){return this.x*this.x+this.y*this.y+this.z*this.z},length:function(){return Math.sqrt(this.lengthSq())},lengthManhattan:function(){return this.x+this.y+this.z},normalize:function(){return this.divideScalar(this.length())},setLength:function(a){return this.normalize().multiplyScalar(a)},cross:function(a,b){this.x=
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function randomRange(t,i){return Math.random()*(i-t)+t}Particle3D=function(t){THREE.Particle.call(this,t),this.velocity=new THREE.Vector3(0,-2,0),this.velocity.rotateX(randomRange(-45,45)),this.velocity.rotateY(randomRange(0,360)),this.gravity=new THREE.Vector3(0,0,0),this.drag=1},Particle3D.prototype=new THREE.Particle,Particle3D.prototype.constructor=Particle3D,Particle3D.prototype.updatePhysics=function(){this.velocity.multiplyScalar(this.drag),this.velocity.addSelf(this.gravity),this.position.addSelf(this.velocity)};var TO_RADIANS=Math.PI/180;THREE.Vector3.prototype.rotateY=function(t){cosRY=Math.cos(t*TO_RADIANS),sinRY=Math.sin(t*TO_RADIANS);var i=this.z,o=this.x;this.x=o*cosRY+i*sinRY,this.z=o*-sinRY+i*cosRY},THREE.Vector3.prototype.rotateX=function(t){cosRY=Math.cos(t*TO_RADIANS),sinRY=Math.sin(t*TO_RADIANS);var i=this.z,o=this.y;this.y=o*cosRY+i*sinRY,this.z=o*-sinRY+i*cosRY},THREE.Vector3.prototype.rotateZ=function(t){cosRY=Math.cos(t*TO_RADIANS),sinRY=Math.sin(t*TO_RADIANS);var i=this.x,o=this.y;this.y=o*cosRY+i*sinRY,this.x=o*-sinRY+i*cosRY};
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$(function(){var container=document.querySelector(".snow-container");if(/MSIE 6|MSIE 7|MSIE 8/.test(navigator.userAgent)){return}else{if(/MSIE 9|MSIE 10/.test(navigator.userAgent)){$(container).css("height",$(window).height()).bind("click",function(){$(this).remove()})}}var containerWidth=$(container).width();var containerHeight=$(container).height();var particle;var camera;var scene;var renderer;var mouseX=0;var mouseY=0;var windowHalfX=window.innerWidth/2;var windowHalfY=window.innerHeight/2;var particles=[];var particleImage=new Image();particleImage.src="https://cdn.yimian.xyz/xuehua/ParticleSmoke.png";var snowNum=500;function init(){camera=new THREE.PerspectiveCamera(75,containerWidth/containerHeight,1,10000);camera.position.z=1000;scene=new THREE.Scene();scene.add(camera);renderer=new THREE.CanvasRenderer();renderer.setSize(containerWidth,containerHeight);var material=new THREE.ParticleBasicMaterial({map:new THREE.Texture(particleImage)});for(var i=0;i<snowNum;i++){particle=new Particle3D(material);particle.position.x=Math.random()*2000-1000;particle.position.y=Math.random()*2000-1000;particle.position.z=Math.random()*2000-1000;particle.scale.x=particle.scale.y=1;scene.add(particle);particles.push(particle)}container.appendChild(renderer.domElement);document.addEventListener("mousemove",onDocumentMouseMove,false);document.addEventListener("touchstart",onDocumentTouchStart,false);document.addEventListener("touchmove",onDocumentTouchMove,false);setInterval(loop,1000/40)}function onDocumentMouseMove(event){mouseX=event.clientX-windowHalfX;mouseY=event.clientY-windowHalfY}function onDocumentTouchStart(event){if(event.touches.length==1){event.preventDefault();mouseX=event.touches[0].pageX-windowHalfX;mouseY=event.touches[0].pageY-windowHalfY}}function onDocumentTouchMove(event){if(event.touches.length==1){event.preventDefault();mouseX=event.touches[0].pageX-windowHalfX;mouseY=event.touches[0].pageY-windowHalfY}}function loop(){for(var i=0;i<particles.length;i++){var particle=particles[i];particle.updatePhysics();with(particle.position){if(y<-1000){y+=2000}if(x>1000){x-=2000}else{if(x<-1000){x+=2000}}if(z>1000){z-=2000}else{if(z<-1000){z+=2000}}}}camera.position.x+=(mouseX-camera.position.x)*0.005;camera.position.y+=(-mouseY-camera.position.y)*0.005;camera.lookAt(scene.position);renderer.render(scene,camera)}init()});
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