1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
| function clickEffect() {
let balls = [];
let longPressed = false;
let longPress;
let multiplier = 0;
let width, height;
let origin;
let normal;
let ctx;
const colours = ["#F73859", "#14FFEC", "#00E0FF", "#FF99FE", "#FAF15D"];
const canvas = document.createElement("canvas");
document.body.appendChild(canvas);
canvas.setAttribute("style", "width: 10%; height: 10%; top: 0; left: 0; z-index: 99999; position: fixed; pointer-events: none;");
const pointer = document.createElement("span");
pointer.classList.add("pointer");
document.body.appendChild(pointer);
if (canvas.getContext && window.addEventListener) {
ctx = canvas.getContext("2d");
updateSize();
window.addEventListener('resize', updateSize, false);
loop();
window.addEventListener("mousedown", function(e) {
pushBalls(randBetween(5, 10), e.clientX, e.clientY);
document.body.classList.add("is-pressed");
longPress = setTimeout(function(){
document.body.classList.add("is-longpress");
longPressed = true;
}, 500);
}, false);
window.addEventListener("mouseup", function(e) {
clearInterval(longPress);
if (longPressed == true) {
document.body.classList.remove("is-longpress");
pushBalls(randBetween(20 + Math.ceil(multiplier), 40 + Math.ceil(multiplier)), e.clientX, e.clientY);
longPressed = false;
}
document.body.classList.remove("is-pressed");
}, false);
window.addEventListener("mousemove", function(e) {
let x = e.clientX;
let y = e.clientY;
pointer.style.top = y + "px";
pointer.style.left = x + "px";
}, false);
} else {
console.log("canvas or addEventListener is unsupported!");
}
function updateSize() {
canvas.width = window.innerWidth * 2;
canvas.height = window.innerHeight * 2;
canvas.style.width = window.innerWidth + 'px';
canvas.style.height = window.innerHeight + 'px';
ctx.scale(2, 2);
width = (canvas.width = window.innerWidth);
height = (canvas.height = window.innerHeight);
origin = {
x: width / 2,
y: height / 2
};
normal = {
x: width / 2,
y: height / 2
};
}
class Ball {
constructor(x = origin.x, y = origin.y) {
this.x = x;
this.y = y;
this.angle = Math.PI * 2 * Math.random();
if (longPressed == true) {
this.multiplier = randBetween(9 + multiplier, 10 + multiplier);
} else {
this.multiplier = randBetween(5, 10);
}
this.vx = (this.multiplier + Math.random() * 0.5) * Math.cos(this.angle);
this.vy = (this.multiplier + Math.random() * 0.5) * Math.sin(this.angle);
this.r = randBetween(7, 9) + 3 * Math.random();
this.color = colours[Math.floor(Math.random() * colours.length)];
}
update() {
this.x += this.vx - normal.x;
this.y += this.vy - normal.y;
normal.x = -2 / window.innerWidth * Math.sin(this.angle);
normal.y = -2 / window.innerHeight * Math.cos(this.angle);
this.r -= 0.3;
this.vx *= 0.9;
this.vy *= 0.9;
}
}
function pushBalls(count = 1, x = origin.x, y = origin.y) {
for (let i = 0; i < count; i++) {
balls.push(new Ball(x, y));
}
}
function randBetween(min, max) {
return Math.floor(Math.random() * max) + min;
}
function loop() {
ctx.fillStyle = "rgba(255, 255, 255, 0)";
ctx.clearRect(0, 0, canvas.width, canvas.height);
for (let i = 0; i < balls.length; i++) {
let b = balls[i];
if (b.r < 0) continue;
ctx.fillStyle = b.color;
ctx.beginPath();
ctx.arc(b.x, b.y, b.r, 0, Math.PI * 2, false);
ctx.fill();
b.update();
}
if (longPressed == true) {
multiplier += 0.2;
} else if (!longPressed && multiplier >= 0) {
multiplier -= 0.4;
}
removeBall();
requestAnimationFrame(loop);
}
function removeBall() {
for (let i = 0; i < balls.length; i++) {
let b = balls[i];
if (b.x + b.r < 0 || b.x - b.r > width || b.y + b.r < 0 || b.y - b.r > height || b.r < 0) {
balls.splice(i, 1);
}
}
}
}
clickEffect();
|