Вращающаяся сфера на JS

Пример:

Радиус сферы:

Масштаб сферы:

HTML:

<div id="sphere-wrap">
	<canvas id="sphere"></canvas>
</div>

</div>

CSS:

#sphere-wrap {
	height: 500px;
}
#sphere {
	width: 100%;
	height: 100%;
	background-image: url('bg.jpg');
	background-size: cover;
}

#sphere-wrap {

height: 500px;

}

#sphere {

width: 100%;

height: 100%;

background-image: url('bg.jpg');

background-size: cover;

}

JS:

Некоторые настройки в коде я подписал, а полную версию комментариев и оригинальный код можно посмотреть тут или на сайте rectangleworld.com

window.addEventListener("load", windowLoadHandler, false);
let sphereRad = 280; // радиус
let scale = 1; // масштаб
function windowLoadHandler() {
	canvasApp();
}
function canvasApp() {
	let theCanvas = document.getElementById("sphere");
	let sphere_wrap = document.getElementById("sphere-wrap");
	let context = theCanvas.getContext("2d");
	let displayWidth;
	let displayHeight;
	let timer;
	let wait;
	let count;
	let numToAddEachFrame;
	let particleList;
	let recycleBin;
	let particleAlpha;
	let fLen;
	let m;
	let projCenterX;
	let projCenterY;
	let zMax;
	let turnAngle;
	let turnSpeed;
	let sphereCenterX, sphereCenterY, sphereCenterZ;
	let particleRad;
	let zeroAlphaDepth;
	let randAccelX, randAccelY, randAccelZ;
	let gravity;
	let rgbString;
	let p;
	let outsideTest;
	let nextParticle;
	let sinAngle;
	let cosAngle;
	let rotX, rotZ;
	let depthAlphaFactor;
	let i;
	let theta, phi;
	let x0, y0, z0;	
	init();
	window.addEventListener('resize', init, false);
	function init() {
		wait = 1;
		count = wait - 1;
		numToAddEachFrame = 8;
		rgbString = "rgba(169,195,238,"; // цвет частиц
		particleAlpha = 1;		
		displayWidth = theCanvas.width = sphere_wrap.offsetWidth;
		displayHeight = theCanvas.height = sphere_wrap.offsetHeight;	
		fLen = 320;
		projCenterX = displayWidth/3; // центр сферы по оси X
		projCenterY = displayHeight/2; // центр сферы по оси Y
		zMax = fLen-2;
		particleList = {};
		recycleBin = {};
		randAccelX = 0.1;
		randAccelY = 0.1;
		randAccelZ = 0.1;
		gravity = -0;
		particleRad = 2.5; // размер частиц
		sphereCenterX = 0;
		sphereCenterY = 0;
		sphereCenterZ = -3 - sphereRad;
		zeroAlphaDepth = -750; 
		turnSpeed = 2*Math.PI/1200; // скорость вращения сферы
		turnAngle = 0; 
		timer = setInterval(onTimer, 10/24);
	}
	function onTimer() {	
		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);
				let p = addParticle(x0, sphereCenterY + y0, sphereCenterZ + z0, 0.002*x0, 0.002*y0, 0.002*z0);
				p.attack = 50;
				p.hold = 50;
				p.decay = 100;
				p.initValue = 0;
				p.holdValue = particleAlpha;
				p.lastValue = 0;
				p.stuckTime = 90 + Math.random()*20;
				p.accelX = 0;
				p.accelY = gravity;
				p.accelZ = 0;
			}
		}
		turnAngle = (turnAngle + turnSpeed) % (2*Math.PI);
		sinAngle = Math.sin(turnAngle);
		cosAngle = Math.cos(turnAngle);
		context.clearRect(0, 0, displayWidth, displayHeight);
		p = particleList.first;
		while (p != null) {
			nextParticle = p.next;
			p.age++;
			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;
			}
			rotX =  cosAngle*p.x + sinAngle*(p.z - sphereCenterZ);
			rotZ =  -sinAngle*p.x + cosAngle*(p.z - sphereCenterZ) + sphereCenterZ;
			m = scale * fLen/(fLen - rotZ);
			p.projX = rotX*m + projCenterX;
			p.projY = p.y*m + projCenterY;
			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;
			}
			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 {
				depthAlphaFactor = (1-rotZ/zeroAlphaDepth);
				depthAlphaFactor = (depthAlphaFactor > 1) ? 1 : ((depthAlphaFactor<0) ? 0 : depthAlphaFactor);
				context.fillStyle = rgbString + depthAlphaFactor*p.alpha + ")";
				context.beginPath();
				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) {
		let newParticle;
		let color;
		if (recycleBin.first != null) {
			newParticle = recycleBin.first;
			if (newParticle.next != null) {
				recycleBin.first = newParticle.next;
				newParticle.next.prev = null;
				} else {
				recycleBin.first = null;
			}
			} else {
			newParticle = {};
		}
		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;
		}
		newParticle.x = x0;
		newParticle.y = y0;
		newParticle.z = z0;
		newParticle.velX = vx0;
		newParticle.velY = vy0;
		newParticle.velZ = vz0;
		newParticle.age = 0;
		newParticle.dead = false;
		if (Math.random() < 0.5) {
			newParticle.right = true;
			} else {
			newParticle.right = false;
		}
		return newParticle;		
	}
	function recycle(p) {
		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;
			}
		}
		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;
		}
	}	
}

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window.addEventListener("load", windowLoadHandler, false);

let sphereRad = 280; // радиус

let scale = 1; // масштаб

function windowLoadHandler() {

canvasApp();

}

function canvasApp() {

let theCanvas = document.getElementById("sphere");

let sphere_wrap = document.getElementById("sphere-wrap");

let context = theCanvas.getContext("2d");

let displayWidth;

let displayHeight;

let timer;

let wait;

let count;

let numToAddEachFrame;

let particleList;

let recycleBin;

let particleAlpha;

let fLen;

let m;

let projCenterX;

let projCenterY;

let zMax;

let turnAngle;

let turnSpeed;

let sphereCenterX, sphereCenterY, sphereCenterZ;

let particleRad;

let zeroAlphaDepth;

let randAccelX, randAccelY, randAccelZ;

let gravity;

let rgbString;

let p;

let outsideTest;

let nextParticle;

let sinAngle;

let cosAngle;

let rotX, rotZ;

let depthAlphaFactor;

let i;

let theta, phi;

let x0, y0, z0;

init();

window.addEventListener('resize', init, false);

function init() {

wait = 1;

count = wait - 1;

numToAddEachFrame = 8;

rgbString = "rgba(169,195,238,"; // цвет частиц

particleAlpha = 1;

displayWidth = theCanvas.width = sphere_wrap.offsetWidth;

displayHeight = theCanvas.height = sphere_wrap.offsetHeight;

fLen = 320;

projCenterX = displayWidth/3; // центр сферы по оси X

projCenterY = displayHeight/2; // центр сферы по оси Y

zMax = fLen-2;

particleList = {};

recycleBin = {};

randAccelX = 0.1;

randAccelY = 0.1;

randAccelZ = 0.1;

gravity = -0;

particleRad = 2.5; // размер частиц

sphereCenterX = 0;

sphereCenterY = 0;

sphereCenterZ = -3 - sphereRad;

zeroAlphaDepth = -750;

turnSpeed = 2*Math.PI/1200; // скорость вращения сферы

turnAngle = 0;

timer = setInterval(onTimer, 10/24);

}

function onTimer() {

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);

let p = addParticle(x0, sphereCenterY + y0, sphereCenterZ + z0, 0.002*x0, 0.002*y0, 0.002*z0);

p.attack = 50;

p.hold = 50;

p.decay = 100;

p.initValue = 0;

p.holdValue = particleAlpha;

p.lastValue = 0;

p.stuckTime = 90 + Math.random()*20;

p.accelX = 0;

p.accelY = gravity;

p.accelZ = 0;

}

turnAngle = (turnAngle + turnSpeed) % (2*Math.PI);

sinAngle = Math.sin(turnAngle);

cosAngle = Math.cos(turnAngle);

context.clearRect(0, 0, displayWidth, displayHeight);

p = particleList.first;

while (p != null) {

nextParticle = p.next;

p.age++;

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;

}

rotX = cosAngle*p.x + sinAngle*(p.z - sphereCenterZ);

rotZ = -sinAngle*p.x + cosAngle*(p.z - sphereCenterZ) + sphereCenterZ;

m = scale * fLen/(fLen - rotZ);

p.projX = rotX*m + projCenterX;

p.projY = p.y*m + projCenterY;

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;

}

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 {

depthAlphaFactor = (1-rotZ/zeroAlphaDepth);

depthAlphaFactor = (depthAlphaFactor > 1) ? 1 : ((depthAlphaFactor<0) ? 0 : depthAlphaFactor);

context.fillStyle = rgbString + depthAlphaFactor*p.alpha + ")";

context.beginPath();

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) {

let newParticle;

let color;

if (recycleBin.first != null) {

newParticle = recycleBin.first;

if (newParticle.next != null) {

recycleBin.first = newParticle.next;

newParticle.next.prev = null;

} else {

recycleBin.first = null;

}

} else {

newParticle = {};

}

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;

}

newParticle.x = x0;

newParticle.y = y0;

newParticle.z = z0;

newParticle.velX = vx0;

newParticle.velY = vy0;

newParticle.velZ = vz0;

newParticle.age = 0;

newParticle.dead = false;

if (Math.random() < 0.5) {

newParticle.right = true;

} else {

newParticle.right = false;

}

return newParticle;

}

function recycle(p) {

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;

}

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;

}

Источник: rectangleworld.com

Владимир: 25.07.2021 в 21:17

Сайт отменный!!!! Столько плюшек интересных!!!! Спасибо Вас огромное ребята!!!

Ответить
Станислав: 06.06.2021 в 22:34

Крутой Вы чувак! Сайт одними кайфами набит! Спасибо!

Ответить
Станислав: 06.06.2021 в 01:19

Как подключить на вордпрес? НЕ получается ни один кайф подклюxить, которые с js///

Ответить
- Станислав: 06.06.2021 в 07:23
  
  Получилось )
  
  Ответить

Пример:

Радиус сферы:

Масштаб сферы:

HTML:

CSS:

JS:

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