X-Git-Url: https://git.r.bdr.sh/rbdr/r.bdr.sh/blobdiff_plain/59f6606b915c93ad38d3d9ce74c600e975dd1031..0fe938a50ab660bbe145aeacd6f4283c163cd31d:/js/animation.js

diff --git a/js/animation.js b/js/animation.js
index e0a543f..9793601 100644
--- a/js/animation.js
+++ b/js/animation.js
@@ -1,142 +1,102 @@
 (function () {
 
-  var canvas = document.querySelector('canvas'),
-      context = canvas.getContext('2d'),
-      fps = 30,
-      lastFrame = 0,
-      speed = 1,
-      size = 5 + rand(10);
-
-  var clear = !!(Math.random() > 0.5);
-  var changeColor = !!(Math.random() > 0.5);
-  var items = Array(rand(10) + 6).fill(null).map(() => ({
-    x: rand(100),
-    y: rand(100),
-    angle: Math.random() * 2 * Math.PI,
-    color: Array(3).fill(rand(256))
-  }));
-  var shapes = [square, circle, heart, chaos, lineChaos];
-  var positions = [identity, spin(5), spin(15)];
-  var draw = shapes[rand(shapes.length)];
-  var position = positions[rand(positions.length)];
-
-  function rand (x) {
-    return Math.floor(Math.random() * x);
-  }
-
-  function square(item) {
-
-    var p = position(item);
-    context.fillRect(p.x, p.y, size, size);
-  }
-
-  function circle(item) {
-
-    var p = position(item);
-    context.beginPath();
-    context.arc(p.x, p.y, size / 2, 0, 2 * Math.PI);
-    context.fill();
-  }
-
-  function chaos(item) {
-
-    var p = position(item);
-    context.beginPath();
-    context.moveTo(p.x, p.y);
-    context.lineTo(p.x * 10 * Math.cos(item.angle), p.y * 10 * Math.sin(item.angle));
-    context.lineTo(rand(100), rand(100));
-    context.fill();
-  }
-
-  function lineChaos(item) {
-
-    var p = position(item);
-    context.beginPath();
-    context.lineWidth = 5;
-    context.strokeStyle = `rgb(${item.color.join(',')})`;
-    context.moveTo(p.x, p.y);
-    context.lineTo(p.x * 10 * Math.cos(item.angle), p.y * 10 * Math.sin(item.angle));
-    context.stroke();
-  }
-
-  function square(item) {
-
-    var p = position(item);
-    context.fillRect(p.x, p.y, size, size);
-  }
-
-  function heart(item) {
-
-    var p = position(item);
-    context.fillRect(p.x, p.y, size, size);
-
-    context.beginPath();
-    context.arc(p.x + size / 2, p.y, size / 2, 0, 2 * Math.PI, false);
-    context.fill();
-    context.closePath();
-
-    context.beginPath();
-    context.arc(p.x + size, p.y + size / 2, size / 2, 0, 2 * Math.PI, false);
-    context.fill();
-    context.closePath();
-  }
-
-  function identity(position) {
-
-    return position;
-  }
-
-  function spin(radius) {
-    return function (position) {
-
-      return {
-        x: position.x + radius * Math.cos(lastFrame),
-        y: position.y + radius * Math.sin(lastFrame)
-      }
-    }
-  }
-
-  function move(item) {
-
-    item.x = item.x + speed * Math.cos(item.angle);
-    item.y = item.y + speed * Math.sin(item.angle);
-
-    if (item.x < 0 || item.x > 100) {
-      item.angle = Math.atan2(Math.sin(item.angle), -Math.cos(item.angle))
-    }
-
-    if (item.y < 0 || item.y > 100) {
-      item.angle = Math.atan2(-Math.sin(item.angle), Math.cos(item.angle))
-    }
-  }
-
-  function updateColor(item) {
-
-    item.color = item.color.map((c) => {
-      c = c + 5;
-      return c > 255 ? 0 : c;
-    })
-  }
-
-  function frame(time) {
-
-    window.requestAnimationFrame(frame);
-
-    var delta = time - lastFrame;
-
-    if (delta > 1000 / fps) {
-      clear && context.clearRect(0, 0, 100, 100);
-      for (var item of items) {
-        context.fillStyle = `rgb(${item.color.join(',')})`;
-        draw(item);
-        changeColor && updateColor(item);
-        move(item);
-      }
-
-      lastFrame = time;
-    }
-  }
-
-  frame();
+  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 + 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))
+      })),
+      S = [sqr, crc, hrt, chs, lch],
+      P = [id, spn(5), spn(15)],
+      draw = S[r(S.length)],
+      pos = P[r(P.length)]
+
+  frm()
 }
-)();
+)()