X-Git-Url: https://git.r.bdr.sh/rbdr/r.bdr.sh/blobdiff_plain/df62fcfe7f7c86127f5bc0250c4430949371258f..0fe938a50ab660bbe145aeacd6f4283c163cd31d:/js/animation.js

diff --git a/js/animation.js b/js/animation.js
index 074b1df..9793601 100644
--- a/js/animation.js
+++ b/js/animation.js
@@ -1,139 +1,102 @@
 (function () {
 
-  var canvas = document.querySelector('canvas'),
-      r = Math.random,
-      pi = Math.PI,
-      cos = Math.cos,
-      sin = Math.sin,
-      ctx = canvas.getContext('2d'),
-      fps = 24,
-      lst = 0,
+  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,
       spd = 1,
-      siz = 5 + rnd(10),
-      clr = !!(r() > 0.5),
-      ccl = !!(r() > 0.5),
-      I = Array(rnd(10) + 6).fill(null).map(() => ({
-        x: rnd(64),
-        y: rnd(64),
-        a: r() * 2 * pi,
-        c: Array(3).fill(rnd(256))
+      siz = 5 + r(10),
+      clr = R() > 0.5,
+      ccl = R() > 0.5,
+      I = Array(r(10) + 6).fill().map(() => ({
+        x: r(64),
+        y: r(64),
+        a: R() * 2 * PI,
+        c: Array(3).fill(r(256))
       })),
-      SHP = [sqr, crc, hrt, chs, lch],
-      POS = [id, spn(5), spn(15)],
-      draw = SHP[rnd(SHP.length)],
-      pos = POS[rnd(POS.length)];
-
-  function rnd (x) {
-    return Math.floor(r() * x);
-  }
-
-  function sqr(i) {
-
-    var p = pos(i);
-    ctx.fillRect(p.x, p.y, siz, siz);
-  }
-
-  function crc(i) {
-
-    var p = pos(i);
-    ctx.beginPath();
-    ctx.arc(p.x, p.y, siz / 2, 0, 2 * pi);
-    ctx.fill();
-  }
-
-  function chs(i) {
-
-    var p = pos(i);
-    ctx.beginPath();
-    ctx.moveTo(p.x, p.y);
-    ctx.lineTo(p.x * 10 * cos(i.a), p.y * 10 * sin(i.a));
-    ctx.lineTo(rnd(64), rnd(64));
-    ctx.fill();
-  }
-
-  function lch(i) {
-
-    var p = pos(i);
-    ctx.beginPath();
-    ctx.lineWidth = 5;
-    ctx.strokeStyle = `rgb(${i.c.join(',')})`;
-    ctx.moveTo(p.x, p.y);
-    ctx.lineTo(p.x * 10 * cos(i.a), p.y * 10 * sin(i.a));
-    ctx.stroke();
-  }
-
-  function hrt(i) {
-
-    var p = pos(i);
-    ctx.fillRect(p.x, p.y, siz, siz);
-
-    ctx.beginPath();
-    ctx.arc(p.x + siz / 2, p.y, siz / 2, 0, 2 * pi, false);
-    ctx.fill();
-    ctx.closePath();
-
-    ctx.beginPath();
-    ctx.arc(p.x + siz, p.y + siz / 2, siz / 2, 0, 2 * pi, false);
-    ctx.fill();
-    ctx.closePath();
-  }
-
-  function id(p) {
-
-    return p;
-  }
-
-  function spn(rad) {
-    return function (p) {
-
-      return {
-        x: p.x + rad * cos(lst),
-        y: p.y + rad * sin(lst)
-      }
-    }
-  }
-
-  function mov(i) {
-
-    i.x = i.x + spd * cos(i.a);
-    i.y = i.y + spd * sin(i.a);
-
-    if (i.x < 0 || i.x > 64) {
-      i.a = Math.atan2(sin(i.a), -cos(i.a))
-    }
-
-    if (i.y < 0 || i.y > 64) {
-      i.a = Math.atan2(-sin(i.a), cos(i.a))
-    }
-  }
-
-  function ucl(i) {
-
-    i.c = i.c.map((c) => {
-      c = c + 5;
-      return c > 255 ? 0 : c;
-    })
-  }
-
-  function frm(t) {
-
-    window.requestAnimationFrame(frm);
-
-    var dt = t - lst;
-
-    if (dt > 1000 / fps) {
-      clr && ctx.clearRect(0, 0, 64, 64);
-      for (var i of I) {
-        ctx.fillStyle = `rgb(${i.c.join(',')})`;
-        draw(i);
-        ccl && ucl(i);
-        mov(i);
-      }
-
-      lst = t;
-    }
-  }
+      S = [sqr, crc, hrt, chs, lch],
+      P = [id, spn(5), spn(15)],
+      draw = S[r(S.length)],
+      pos = P[r(P.length)]
 
-  frm();
+  frm()
 }
-)();
+)()