Created
May 3, 2011 23:02
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JS1k winner by @KeenBlaze unpacked by @tbdr
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<html> | |
<head> | |
<title>JS1k, 1k demo submission [984]</title> | |
<meta charset="utf-8"> | |
</head> | |
<body marginwidth="0" marginheight="0"> | |
<canvas id="c" width="1000" height="800"></canvas> | |
<script> | |
var b = document.body; | |
var c = document.getElementsByTagName('canvas')[0]; | |
var a = c.getContext('2d'); | |
document.body.clientWidth; // fix bug in webkit: http://qfox.nl/weblog/218 | |
</script> | |
<script> | |
// start of submission // | |
w = c.width = 1e3, | |
h = c.height = 800, | |
W = 50, | |
l = 3 / W, | |
r = 40, | |
p = h / 3, | |
X = [], | |
oX = [], | |
Q = [], | |
Y = [], | |
oY = [], | |
T = [], | |
S = [], | |
ondblclick = G = function(a) { | |
Z = W; | |
while (Z--) oX[Z] = X[Z] = w / 2 - 16 * Z, | |
oY[Z] = Y[Z] = I = J = V = 0, | |
b = Z < 4, | |
b | a < 0 && (Q[Z] = b ? (Z & 2) * 300 + 200: 900, T[Z] = b ? (Z & 1) * 350 + 200: 70 * (Z - 3), S[Z] = b ? 2: Z - 5) | |
}, | |
G(Z = -1), | |
onmousedown = function(a) { | |
Z = 9 | |
}, | |
onmouseup = function(a) { | |
Z = -1 | |
}, | |
onmousemove = function(a) { | |
Q[Z] = I = a.pageX, | |
T[Z] = J = a.pageY | |
} | |
setInterval(function(){ | |
a.clearRect(0, 0, w, h), | |
a.shadowColor = "#000", | |
a.shadowBlur = 3; | |
for (i = 1; i < W; i++) X[i] += .995 * ((t = X[i]) - oX[i]), | |
oX[i] = t, | |
Y[i] += .995 * ((t = Y[i]) - oY[i]) + .5, | |
oY[i] = t; | |
j = W; | |
while (j--) { | |
for (i = 1; i < W; i++) { | |
k = 7; | |
while (k--) x = X[i] - Q[k], | |
y = Y[i] - T[k], | |
d = 1 - r / Math.sqrt(x * x + y * y), | |
m = S[k] * 2, | |
m < 3 && (d < 0 && (X[i] -= (x + m * y) * d, Y[i] -= (y - m * x) * d), x += I - X[i], y += J - Y[i], Z > 0 & Math.sqrt(x * x + y * y) < r && (Z = V = k)), | |
i - W + m - V > 2 & d < 0 && S[k]++; | |
x = X[i] - X[i - 1], | |
y = Y[i] - Y[i - 1], | |
X[i] -= k = x * (m = .7 - .7 * l * p / Math.sqrt(x * x + y * y)), | |
Y[i] -= _ = y * m, | |
i > 1 && (X[i - 1] += k, Y[i - 1] += _) | |
} | |
s = S[j], | |
b = s == 0, | |
g = s > 1, | |
a.fillStyle = b ? "#f58": g ? "#ef6": "#be5", | |
a.font = (b ? 76: g ? r: 65) + "pt lucida sans unicode", | |
s < 3 & j < 7 && a.fillText(b ? "○": s > 0 ? g ? "★": "↺": "↻", Q[j] - (g ? 28: r), T[j] + (b ? 29: g ? 21: 32)) | |
} | |
for (i = 1; i < W; i++) a.strokeStyle = i > W - 2 ? "#cde": "#abc", | |
a.beginPath(a.lineWidth = 13), | |
a.moveTo(X[i - 1], Y[i - 1]), | |
a.stroke(a.lineTo(X[i], Y[i])) | |
},30) | |
// end of submission // | |
</script> | |
</body></html> |
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