var K = document.querySelector('canvas'),
{ random: R, PI, cos: C, sin: S, floor, atan2: A } = Math,
- r = x => floor(R() * x),
- sqr = i => {
- var p = pos(i)
- x.fillRect(p.x, p.y, siz, siz)
- },
- crc = i => {
- var p = pos(i)
- x.beginPath()
- x.arc(p.x, p.y, siz / 2, 0, 2 * PI)
- x.fill()
- },
- chs = i => {
- var p = pos(i)
- x.beginPath()
- x.moveTo(p.x, p.y)
- x.lineTo(p.x * 10 * C(i.a), p.y * 10 * S(i.a))
- x.lineTo(r(64), r(64))
- x.fill()
- },
- lch = i => {
- var p = pos(i)
- x.beginPath()
- x.lineWidth = 5
- x.strokeStyle = `rgb(${i.c.join(',')})`
- x.moveTo(p.x, p.y)
- x.lineTo(p.x * 10 * C(i.a), p.y * 10 * S(i.a))
- x.stroke()
- },
- hrt = i => {
- var p = pos(i)
- x.fillRect(p.x, p.y, siz, siz)
-
- x.beginPath()
- x.arc(p.x + siz / 2, p.y, siz / 2, 0, 2 * PI, false)
- x.fill()
- x.closePath()
-
- x.beginPath()
- x.arc(p.x + siz, p.y + siz / 2, siz / 2, 0, 2 * PI, false)
- x.fill()
- x.closePath()
- },
- id = p => p,
- spn = rad => (p => ({
- x: p.x + rad * C(l),
- y: p.y + rad * S(l)
- })),
- mov = i => {
- i.x = i.x + spd * C(i.a)
- i.y = i.y + spd * S(i.a)
-
- if (i.x < 0 || i.x > 64) {
- i.a = A(S(i.a), -C(i.a))
- }
-
- if (i.y < 0 || i.y > 64) {
- i.a = A(-S(i.a), C(i.a))
- }
- },
- ucl = i => i.c = i.c.map(c => (c + 5) % 256),
- frm = t => {
- window.requestAnimationFrame(frm)
-
- var dt = t - l
-
- if (dt > 1000 / f) {
- clr && x.clearRect(0, 0, 64, 64)
- for (var i of I) {
- x.fillStyle = `rgb(${i.c.join(',')})`
- draw(i)
- ccl && ucl(i)
- mov(i)
- }
-
- l = t
- }
- },
x = K.getContext('2d'),
f = 24,
l = 0,
a: R() * 2 * PI,
c: Array(3).fill(r(256))
})),
- S = [sqr, crc, hrt, chs, lch],
+ H = [sqr, crc, hrt, chs, lch],
P = [id, spn(5), spn(15)],
- draw = S[r(S.length)],
+ draw = H[r(H.length)],
pos = P[r(P.length)]
+ function r(x) {
+ return floor(R() * x)
+ }
+
+ function sqr(i) {
+
+ var p = pos(i)
+ x.fillRect(p.x, p.y, siz, siz)
+ }
+
+ function crc(i) {
+
+ var p = pos(i)
+ x.beginPath()
+ x.arc(p.x, p.y, siz / 2, 0, 2 * PI)
+ x.fill()
+ }
+
+ function chs(i) {
+
+ var p = pos(i)
+ x.beginPath()
+ x.moveTo(p.x, p.y)
+ x.lineTo(p.x * 10 * C(i.a), p.y * 10 * S(i.a))
+ x.lineTo(r(64), r(64))
+ x.fill()
+ }
+
+ function lch(i) {
+
+ var p = pos(i)
+ x.beginPath()
+ x.lineWidth = 5
+ x.strokeStyle = `rgb(${i.c.join(',')})`
+ x.moveTo(p.x, p.y)
+ x.lineTo(p.x * 10 * C(i.a), p.y * 10 * S(i.a))
+ x.stroke()
+ }
+
+ function hrt(i) {
+
+ var p = pos(i)
+ x.fillRect(p.x, p.y, siz, siz)
+
+ x.beginPath()
+ x.arc(p.x + siz / 2, p.y, siz / 2, 0, 2 * PI, false)
+ x.fill()
+ x.closePath()
+
+ x.beginPath()
+ x.arc(p.x + siz, p.y + siz / 2, siz / 2, 0, 2 * PI, false)
+ x.fill()
+ x.closePath()
+ }
+
+ function id(p) {
+
+ return p
+ }
+
+ function spn(rad) {
+ return (p) => ({
+ x: p.x + rad * C(l),
+ y: p.y + rad * S(l)
+ })
+ }
+
+ function mov(i) {
+
+ i.x = i.x + spd * C(i.a)
+ i.y = i.y + spd * S(i.a)
+
+ if (i.x < 0 || i.x > 64) {
+ i.a = A(S(i.a), -C(i.a))
+ }
+ if (i.y < 0 || i.y > 64) {
+ i.a = A(-S(i.a), C(i.a))
+ }
+ }
+
+ function ucl(i) {
+ i.c = i.c.map(c => (c + 5) % 256)
+ }
+
+ function frm(t) {
+
+ window.requestAnimationFrame(frm)
+
+ var dt = t - l
+
+ if (dt > 1000 / f) {
+ clr && x.clearRect(0, 0, 64, 64)
+ for (var i of I) {
+ x.fillStyle = `rgb(${i.c.join(',')})`
+ draw(i)
+ ccl && ucl(i)
+ mov(i)
+ }
+
+ l = t
+ }
+ }
+
frm()
}
)()