Вращающаяся сфера из частиц на HTML5 и jQuery

Разместил: Apocalypse
Опубликовано: 3 апреля 2016

Очень необычная реализация вращающейся сферы на HTML5 Для начала посмотрите ДЕМО Моё тестирование в редакторе: КЛИК Установка: 1#: В то место, где будет сфера, вставьте:

<canvas id="canvasOne" width="900" height="520"></canvas></script>

1	<canvas id="canvasOne" width="900" height="520"></canvas></script>

2#: Сразу после этого поместите исполняемый скрипт:

<script>
window.addEventListener("load", windowLoadHandler, false);
var sphereRad = 300;
var radius_sp = 1;
//for debug messages
var Debugger = function() {};
Debugger.log = function(message) {
try {
console.log(message);
} catch (exception) {
return;
}
}

function windowLoadHandler() {
canvasApp();
}

function canvasSupport() {
return Modernizr.canvas;
}

function canvasApp() {
if (!canvasSupport()) {
return;
}

var theCanvas = document.getElementById("canvasOne");
var context = theCanvas.getContext("2d");

var displayWidth;
var displayHeight;
var timer;
var wait;
var count;
var numToAddEachFrame;
var particleList;
var recycleBin;
var particleAlpha;
var r, g, b;
var fLen;
var m;
var projCenterX;
var projCenterY;
var zMax;
var turnAngle;
var turnSpeed;
var sphereCenterX, sphereCenterY, sphereCenterZ;
var particleRad;
var zeroAlphaDepth;
var randAccelX, randAccelY, randAccelZ;
var gravity;
var rgbString;
//we are defining a lot of variables used in the screen update functions globally so that they don't have to be redefined every frame.
var p;
var outsideTest;
var nextParticle;
var sinAngle;
var cosAngle;
var rotX, rotZ;
var depthAlphaFactor;
var i;
var theta, phi;
var x0, y0, z0;

init();

function init() {
wait = 2;
count = wait - 1;
numToAddEachFrame = 1;

//particle color
r = 70;
g = 255;
b = 140;

rgbString = "rgba(" + r + "," + g + "," + b + ","; //partial string for color which will be completed by appending alpha value.
particleAlpha = 1; //maximum alpha

displayWidth = theCanvas.width;
displayHeight = theCanvas.height;

fLen = 320; //represents the distance from the viewer to z=0 depth.

//projection center coordinates sets location of origin
projCenterX = displayWidth / 2;
projCenterY = displayHeight / 2;

//we will not draw coordinates if they have too large of a z-coordinate (which means they are very close to the observer).
zMax = fLen - 2;

particleList = {};
recycleBin = {};

//random acceleration factors - causes some random motion
randAccelX = 0.1;
randAccelY = 0.1;
randAccelZ = 0.1;

gravity = -0; //try changing to a positive number (not too large, for example 0.3), or negative for floating upwards.

particleRad = 2.5;

sphereCenterX = 0;
sphereCenterY = 0;
sphereCenterZ = -3 - sphereRad;

//alpha values will lessen as particles move further back, causing depth-based darkening:
zeroAlphaDepth = -750;

turnSpeed = 2 * Math.PI / 5000; //the sphere will rotate at this speed (one complete rotation every 1600 frames).
turnAngle = 0; //initial angle

timer = setInterval(onTimer, 10 / 24);
}

function onTimer() {
//if enough time has elapsed, we will add new particles.		
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);

//We use the addParticle function to add a new particle. The parameters set the position and velocity components.
//Note that the velocity parameters will cause the particle to initially fly outwards away from the sphere center (after
//it becomes unstuck).
var p = addParticle(x0, sphereCenterY + y0, sphereCenterZ + z0, 0.002 * x0, 0.002 * y0, 0.002 * z0);

//we set some "envelope" parameters which will control the evolving alpha of the particles.
p.attack = 50;
p.hold = 50;
p.decay = 100;
p.initValue = 0;
p.holdValue = particleAlpha;
p.lastValue = 0;

//the particle will be stuck in one place until this time has elapsed:
p.stuckTime = 90 + Math.random() * 20;

p.accelX = 0;
p.accelY = gravity;
p.accelZ = 0;
}
}

//update viewing angle
turnAngle = (turnAngle + turnSpeed) % (2 * Math.PI);
sinAngle = Math.sin(turnAngle);
cosAngle = Math.cos(turnAngle);

//background fill
context.fillStyle = "#000000";
context.fillRect(0, 0, displayWidth, displayHeight);

//update and draw particles
p = particleList.first;
while (p != null) {
//before list is altered record next particle
nextParticle = p.next;

//update age
p.age++;

//if the particle is past its "stuck" time, it will begin to move.
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;
}

/*
We are doing two things here to calculate display coordinates.
The whole display is being rotated around a vertical axis, so we first calculate rotated coordinates for
x and z (but the y coordinate will not change).
Then, we take the new coordinates (rotX, y, rotZ), and project these onto the 2D view plane.
*/
rotX = cosAngle * p.x + sinAngle * (p.z - sphereCenterZ);
rotZ = -sinAngle * p.x + cosAngle * (p.z - sphereCenterZ) + sphereCenterZ;
m = radius_sp * fLen / (fLen - rotZ);
p.projX = rotX * m + projCenterX;
p.projY = p.y * m + projCenterY;

//update alpha according to envelope parameters.
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;
}

//see if the particle is still within the viewable range.
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 {
//depth-dependent darkening
depthAlphaFactor = (1 - rotZ / zeroAlphaDepth);
depthAlphaFactor = (depthAlphaFactor > 1) ? 1 : ((depthAlphaFactor < 0) ? 0 : depthAlphaFactor);
context.fillStyle = rgbString + depthAlphaFactor * p.alpha + ")";

//draw
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) {
var newParticle;
var color;

//check recycle bin for available drop:
if (recycleBin.first != null) {
newParticle = recycleBin.first;
//remove from bin
if (newParticle.next != null) {
recycleBin.first = newParticle.next;
newParticle.next.prev = null;
} else {
recycleBin.first = null;
}
}
//if the recycle bin is empty, create a new particle (a new ampty object):
else {
newParticle = {};
}

//add to beginning of particle list
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;
}

//initialize
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) {
//remove from particleList
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;
}
}
//add to recycle bin
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;
}
}
}

$(function() {
$("#slider-range").slider({
range: false,
min: 20,
max: 500,
value: 280,
slide: function(event, ui) {
console.log(ui.value);
sphereRad = ui.value;
}
});
});

$(function() {
$("#slider-test").slider({
range: false,
min: 1.0,
max: 2.0,
value: 1,
step: 0.01,
slide: function(event, ui) {
radius_sp = ui.value;
}
});
});
</script>

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

var sphereRad = 300;

var radius_sp = 1;

//for debug messages

var Debugger = function() {};

Debugger.log = function(message) {

try {

console.log(message);

} catch (exception) {

return;

}

function windowLoadHandler() {

canvasApp();

}

function canvasSupport() {

return Modernizr.canvas;

}

function canvasApp() {

if (!canvasSupport()) {

return;

}

var theCanvas = document.getElementById("canvasOne");

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

var displayWidth;

var displayHeight;

var timer;

var wait;

var count;

var numToAddEachFrame;

var particleList;

var recycleBin;

var particleAlpha;

var r, g, b;

var fLen;

var m;

var projCenterX;

var projCenterY;

var zMax;

var turnAngle;

var turnSpeed;

var sphereCenterX, sphereCenterY, sphereCenterZ;

var particleRad;

var zeroAlphaDepth;

var randAccelX, randAccelY, randAccelZ;

var gravity;

var rgbString;

//we are defining a lot of variables used in the screen update functions globally so that they don't have to be redefined every frame.

var p;

var outsideTest;

var nextParticle;

var sinAngle;

var cosAngle;

var rotX, rotZ;

var depthAlphaFactor;

var i;

var theta, phi;

var x0, y0, z0;

init();

function init() {

wait = 2;

count = wait - 1;

numToAddEachFrame = 1;

//particle color

r = 70;

g = 255;

b = 140;

rgbString = "rgba(" + r + "," + g + "," + b + ","; //partial string for color which will be completed by appending alpha value.

particleAlpha = 1; //maximum alpha

displayWidth = theCanvas.width;

displayHeight = theCanvas.height;

fLen = 320; //represents the distance from the viewer to z=0 depth.

//projection center coordinates sets location of origin

projCenterX = displayWidth / 2;

projCenterY = displayHeight / 2;

//we will not draw coordinates if they have too large of a z-coordinate (which means they are very close to the observer).

zMax = fLen - 2;

particleList = {};

recycleBin = {};

//random acceleration factors - causes some random motion

randAccelX = 0.1;

randAccelY = 0.1;

randAccelZ = 0.1;

gravity = -0; //try changing to a positive number (not too large, for example 0.3), or negative for floating upwards.

particleRad = 2.5;

sphereCenterX = 0;

sphereCenterY = 0;

sphereCenterZ = -3 - sphereRad;

//alpha values will lessen as particles move further back, causing depth-based darkening:

zeroAlphaDepth = -750;

turnSpeed = 2 * Math.PI / 5000; //the sphere will rotate at this speed (one complete rotation every 1600 frames).

turnAngle = 0; //initial angle

timer = setInterval(onTimer, 10 / 24);

}

function onTimer() {

//if enough time has elapsed, we will add new particles.

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);

//We use the addParticle function to add a new particle. The parameters set the position and velocity components.

//Note that the velocity parameters will cause the particle to initially fly outwards away from the sphere center (after

//it becomes unstuck).

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

//we set some "envelope" parameters which will control the evolving alpha of the particles.

p.attack = 50;

p.hold = 50;

p.decay = 100;

p.initValue = 0;

p.holdValue = particleAlpha;

p.lastValue = 0;

//the particle will be stuck in one place until this time has elapsed:

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

p.accelX = 0;

p.accelY = gravity;

p.accelZ = 0;

}

//update viewing angle

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

sinAngle = Math.sin(turnAngle);

cosAngle = Math.cos(turnAngle);

//background fill

context.fillStyle = "#000000";

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

//update and draw particles

p = particleList.first;

while (p != null) {

//before list is altered record next particle

nextParticle = p.next;

//update age

p.age++;

//if the particle is past its "stuck" time, it will begin to move.

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;

}

We are doing two things here to calculate display coordinates.

The whole display is being rotated around a vertical axis, so we first calculate rotated coordinates for

x and z (but the y coordinate will not change).

Then, we take the new coordinates (rotX, y, rotZ), and project these onto the 2D view plane.

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

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

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

p.projX = rotX * m + projCenterX;

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

//update alpha according to envelope parameters.

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;

}

//see if the particle is still within the viewable range.

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 {

//depth-dependent darkening

depthAlphaFactor = (1 - rotZ / zeroAlphaDepth);

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

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

//draw

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) {

var newParticle;

var color;

//check recycle bin for available drop:

if (recycleBin.first != null) {

newParticle = recycleBin.first;

//remove from bin

if (newParticle.next != null) {

recycleBin.first = newParticle.next;

newParticle.next.prev = null;

} else {

recycleBin.first = null;

}

//if the recycle bin is empty, create a new particle (a new ampty object):

else {

newParticle = {};

}

//add to beginning of particle list

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;

}

//initialize

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) {

//remove from particleList

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;

}

//add to recycle bin

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;

}

$(function() {

$("#slider-range").slider({

range: false,

min: 20,

max: 500,

value: 280,

slide: function(event, ui) {

console.log(ui.value);

sphereRad = ui.value;

}

});

$(function() {

$("#slider-test").slider({

range: false,

min: 1.0,

max: 2.0,

value: 1,

step: 0.01,

slide: function(event, ui) {

radius_sp = ui.value;

}

});

</script>

P.S. Не забудьте поиграться с числовыми значениями, которые даны в скрипте. Это очень сильно может изменить внешний вид сферы

Автор публикации

не в сети 7 дней

Apocalypse

Я не понял вашего вопроса, но постараюсь на него ответить...

Комментарии: 393Публикации: 1095Регистрация: 27-08-2018

Метки: HTML5 jQuery Вращающаяся Сфера Частицы Эффект

Apocalypse

Я не понял вашего вопроса, но постараюсь на него ответить...

Вам может также понравиться...

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topka

Есть скрипт ( денег или баллов ? )
где можно потратить эти баллы или передать и заработать ?

Что-то такое видел на одном сайте ( сталкер сайт на юкозе было)

2024-03-06 21:31:46

Всевидящее око

Новый пост от installusd1 в теме «PPI Pay-Per-Install Best Advertising Network»

2024-03-25 09:45:25

Всевидящее око

Новый комментарий от пользователя паоа: «пкаор» в материале Ajax отправка комментариев в Wordpess без плагинов от Apocalypse

2024-03-27 20:08:09

Apocalypse

Сайт был восстановлен спустя несколько месяцев бездействия

2024-06-27 16:12:56

fapalnaapo

а Шо случилось за что блокировали

2024-06-30 20:46:10

Apocalypse

@fapalnaapo, банально хостинг не был уплачен

2024-07-14 08:27:24

Apocalypse

Всем привет. У кого как жизнь?

2024-07-30 19:50:15

fapalnaapo

давольно таки не плохо, очень приятно, мне очень нравится между прочем

2024-08-13 10:09:49

Apocalypse

Всем доброго дня

2024-11-07 12:00:10

Al-Sher

Всем привет

2024-11-09 17:57:18

......

Для публикации сообщений в чате необходимо авторизоваться