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@@ -0,0 +1,726 @@
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+(function (global) {
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+ "use strict";
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+
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+ /* Set up a RequestAnimationFrame shim so we can animate efficiently FOR
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+ * GREAT JUSTICE. */
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+ var requestInterval, cancelInterval;
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+
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+ (function () {
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+ var raf = global.requestAnimationFrame ||
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+ global.webkitRequestAnimationFrame ||
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+ global.mozRequestAnimationFrame ||
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+ global.oRequestAnimationFrame ||
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+ global.msRequestAnimationFrame,
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+ caf = global.cancelAnimationFrame ||
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+ global.webkitCancelAnimationFrame ||
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+ global.mozCancelAnimationFrame ||
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+ global.oCancelAnimationFrame ||
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+ global.msCancelAnimationFrame;
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+
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+ if (raf && caf) {
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+ requestInterval = function (fn) {
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+ var handle = { value: null };
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+
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+ function loop() {
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+ handle.value = raf(loop);
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+ fn();
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+ }
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+
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+ loop();
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+ return handle;
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+ };
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+
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+ cancelInterval = function (handle) {
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+ caf(handle.value);
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+ };
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+ }
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+
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+ else {
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+ requestInterval = setInterval;
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+ cancelInterval = clearInterval;
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+ }
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+ }());
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+
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+ /* Catmull-rom spline stuffs. */
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+ /*
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+ function upsample(n, spline) {
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+ var polyline = [],
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+ len = spline.length,
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+ bx = spline[0],
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+ by = spline[1],
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+ cx = spline[2],
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+ cy = spline[3],
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+ dx = spline[4],
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+ dy = spline[5],
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+ i, j, ax, ay, px, qx, rx, sx, py, qy, ry, sy, t;
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+
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+ for(i = 6; i !== spline.length; i += 2) {
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+ ax = bx;
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+ bx = cx;
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+ cx = dx;
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+ dx = spline[i ];
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+ px = -0.5 * ax + 1.5 * bx - 1.5 * cx + 0.5 * dx;
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+ qx = ax - 2.5 * bx + 2.0 * cx - 0.5 * dx;
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+ rx = -0.5 * ax + 0.5 * cx ;
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+ sx = bx ;
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+
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+ ay = by;
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+ by = cy;
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+ cy = dy;
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+ dy = spline[i + 1];
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+ py = -0.5 * ay + 1.5 * by - 1.5 * cy + 0.5 * dy;
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+ qy = ay - 2.5 * by + 2.0 * cy - 0.5 * dy;
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+ ry = -0.5 * ay + 0.5 * cy ;
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+ sy = by ;
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+
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+ for(j = 0; j !== n; ++j) {
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+ t = j / n;
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+
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+ polyline.push(
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+ ((px * t + qx) * t + rx) * t + sx,
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+ ((py * t + qy) * t + ry) * t + sy
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+ );
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+ }
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+ }
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+
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+ polyline.push(
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+ px + qx + rx + sx,
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+ py + qy + ry + sy
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+ );
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+
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+ return polyline;
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+ }
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+
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+ function downsample(n, polyline) {
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+ var len = 0,
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+ i, dx, dy;
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+
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+ for(i = 2; i !== polyline.length; i += 2) {
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+ dx = polyline[i ] - polyline[i - 2];
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+ dy = polyline[i + 1] - polyline[i - 1];
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+ len += Math.sqrt(dx * dx + dy * dy);
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+ }
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+
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+ len /= n;
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+
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+ var small = [],
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+ target = len,
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+ min = 0,
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+ max, t;
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+
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+ small.push(polyline[0], polyline[1]);
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+
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+ for(i = 2; i !== polyline.length; i += 2) {
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+ dx = polyline[i ] - polyline[i - 2];
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+ dy = polyline[i + 1] - polyline[i - 1];
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+ max = min + Math.sqrt(dx * dx + dy * dy);
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+
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+ if(max > target) {
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+ t = (target - min) / (max - min);
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+
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+ small.push(
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+ polyline[i - 2] + dx * t,
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+ polyline[i - 1] + dy * t
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+ );
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+
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+ target += len;
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+ }
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+
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+ min = max;
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+ }
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+
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+ small.push(polyline[polyline.length - 2], polyline[polyline.length - 1]);
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+
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+ return small;
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+ }
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+ */
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+
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+ /* Define skycon things. */
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+ /* FIXME: I'm *really really* sorry that this code is so gross. Really, I am.
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+ * I'll try to clean it up eventually! Promise! */
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+ var KEYFRAME = 500,
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+ STROKE = 0.08,
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+ TAU = 2.0 * Math.PI,
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+ TWO_OVER_SQRT_2 = 2.0 / Math.sqrt(2);
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+
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+ function circle(ctx, x, y, r) {
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+ ctx.beginPath();
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+ ctx.arc(x, y, r, 0, TAU, false);
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+ ctx.fill();
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+ }
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+
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+ function line(ctx, ax, ay, bx, by) {
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+ ctx.beginPath();
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+ ctx.moveTo(ax, ay);
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+ ctx.lineTo(bx, by);
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+ ctx.stroke();
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+ }
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+
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+ function puff(ctx, t, cx, cy, rx, ry, rmin, rmax) {
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+ var c = Math.cos(t * TAU),
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+ s = Math.sin(t * TAU);
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+
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+ rmax -= rmin;
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+
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+ circle(
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+ ctx,
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+ cx - s * rx,
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+ cy + c * ry + rmax * 0.5,
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+ rmin + (1 - c * 0.5) * rmax
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+ );
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+ }
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+
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+ function puffs(ctx, t, cx, cy, rx, ry, rmin, rmax) {
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+ var i;
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+
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+ for (i = 5; i--;)
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+ puff(ctx, t + i / 5, cx, cy, rx, ry, rmin, rmax);
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+ }
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+
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+ function cloud(ctx, t, cx, cy, cw, s, color) {
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+ t /= 30000;
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+
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+ var a = cw * 0.21,
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+ b = cw * 0.12,
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+ c = cw * 0.24,
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+ d = cw * 0.28;
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+
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+ ctx.fillStyle = color;
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+ puffs(ctx, t, cx, cy, a, b, c, d);
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+
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+ ctx.globalCompositeOperation = 'destination-out';
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+ puffs(ctx, t, cx, cy, a, b, c - s, d - s);
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+ ctx.globalCompositeOperation = 'source-over';
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+ }
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+
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+ function sun(ctx, t, cx, cy, cw, s, color) {
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+ t /= 120000;
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+
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+ var a = cw * 0.25 - s * 0.5,
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+ b = cw * 0.32 + s * 0.5,
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+ c = cw * 0.50 - s * 0.5,
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+ i, p, cos, sin;
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+
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+ ctx.strokeStyle = color;
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+ ctx.lineWidth = s;
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+ ctx.lineCap = "round";
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+ ctx.lineJoin = "round";
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+
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+ ctx.beginPath();
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+ ctx.arc(cx, cy, a, 0, TAU, false);
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+ ctx.stroke();
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+
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+ for (i = 8; i--;) {
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+ p = (t + i / 8) * TAU;
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+ cos = Math.cos(p);
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+ sin = Math.sin(p);
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+ line(ctx, cx + cos * b, cy + sin * b, cx + cos * c, cy + sin * c);
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+ }
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+ }
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+
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+ function moon(ctx, t, cx, cy, cw, s, color) {
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+ t /= 15000;
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+
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+ var a = cw * 0.29 - s * 0.5,
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+ b = cw * 0.05,
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+ c = Math.cos(t * TAU),
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+ p = c * TAU / -16;
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+
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+ ctx.strokeStyle = color;
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+ ctx.lineWidth = s;
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+ ctx.lineCap = "round";
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+ ctx.lineJoin = "round";
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+
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+ cx += c * b;
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+
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+ ctx.beginPath();
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+ ctx.arc(cx, cy, a, p + TAU / 8, p + TAU * 7 / 8, false);
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+ ctx.arc(cx + Math.cos(p) * a * TWO_OVER_SQRT_2, cy + Math.sin(p) * a * TWO_OVER_SQRT_2, a, p + TAU * 5 / 8, p + TAU * 3 / 8, true);
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+ ctx.closePath();
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+ ctx.stroke();
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+ }
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+
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+ function rain(ctx, t, cx, cy, cw, s, color) {
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+ t /= 1350;
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+
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+ var a = cw * 0.16,
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+ b = TAU * 11 / 12,
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+ c = TAU * 7 / 12,
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+ i, p, x, y;
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+
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+ ctx.fillStyle = color;
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+
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+ for (i = 4; i--;) {
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+ p = (t + i / 4) % 1;
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+ x = cx + ((i - 1.5) / 1.5) * (i === 1 || i === 2 ? -1 : 1) * a;
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+ y = cy + p * p * cw;
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+ ctx.beginPath();
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+ ctx.moveTo(x, y - s * 1.5);
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+ ctx.arc(x, y, s * 0.75, b, c, false);
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+ ctx.fill();
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+ }
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+ }
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+
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+ function sleet(ctx, t, cx, cy, cw, s, color) {
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+ t /= 750;
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+
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+ var a = cw * 0.1875,
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+ i, p, x, y;
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+
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+ ctx.strokeStyle = color;
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+ ctx.lineWidth = s * 0.5;
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+ ctx.lineCap = "round";
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+ ctx.lineJoin = "round";
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+
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+ for (i = 4; i--;) {
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+ p = (t + i / 4) % 1;
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+ x = Math.floor(cx + ((i - 1.5) / 1.5) * (i === 1 || i === 2 ? -1 : 1) * a) + 0.5;
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+ y = cy + p * cw;
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+ line(ctx, x, y - s * 1.5, x, y + s * 1.5);
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+ }
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+ }
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+
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+ function snow(ctx, t, cx, cy, cw, s, color) {
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+ t /= 3000;
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+
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+ var a = cw * 0.16,
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+ b = s * 0.75,
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+ u = t * TAU * 0.7,
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+ ux = Math.cos(u) * b,
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+ uy = Math.sin(u) * b,
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+ v = u + TAU / 3,
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+ vx = Math.cos(v) * b,
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+ vy = Math.sin(v) * b,
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+ w = u + TAU * 2 / 3,
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+ wx = Math.cos(w) * b,
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+ wy = Math.sin(w) * b,
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+ i, p, x, y;
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+
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+ ctx.strokeStyle = color;
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+ ctx.lineWidth = s * 0.5;
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+ ctx.lineCap = "round";
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+ ctx.lineJoin = "round";
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+
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+ for (i = 4; i--;) {
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+ p = (t + i / 4) % 1;
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+ x = cx + Math.sin((p + i / 4) * TAU) * a;
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+ y = cy + p * cw;
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+
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+ line(ctx, x - ux, y - uy, x + ux, y + uy);
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+ line(ctx, x - vx, y - vy, x + vx, y + vy);
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+ line(ctx, x - wx, y - wy, x + wx, y + wy);
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+ }
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+ }
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+
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+ function fogbank(ctx, t, cx, cy, cw, s, color) {
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+ t /= 30000;
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+
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+ var a = cw * 0.21,
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+ b = cw * 0.06,
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+ c = cw * 0.21,
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+ d = cw * 0.28;
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+
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+ ctx.fillStyle = color;
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+ puffs(ctx, t, cx, cy, a, b, c, d);
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+
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+ ctx.globalCompositeOperation = 'destination-out';
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+ puffs(ctx, t, cx, cy, a, b, c - s, d - s);
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+ ctx.globalCompositeOperation = 'source-over';
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+ }
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+
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+ /*
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+ var WIND_PATHS = [
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+ downsample(63, upsample(8, [
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+ -1.00, -0.28,
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+ -0.75, -0.18,
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+ -0.50, 0.12,
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+ -0.20, 0.12,
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+ -0.04, -0.04,
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+ -0.07, -0.18,
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+ -0.19, -0.18,
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+ -0.23, -0.05,
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+ -0.12, 0.11,
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+ 0.02, 0.16,
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+ 0.20, 0.15,
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+ 0.50, 0.07,
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+ 0.75, 0.18,
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+ 1.00, 0.28
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+ ])),
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+ downsample(31, upsample(16, [
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+ -1.00, -0.10,
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+ -0.75, 0.00,
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+ -0.50, 0.10,
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+ -0.25, 0.14,
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+ 0.00, 0.10,
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+ 0.25, 0.00,
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+ 0.50, -0.10,
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+ 0.75, -0.14,
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+ 1.00, -0.10
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+ ]))
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+ ];
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+ */
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+
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+ var WIND_PATHS = [
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+ [
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+ -0.7500, -0.1800, -0.7219, -0.1527, -0.6971, -0.1225,
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+ -0.6739, -0.0910, -0.6516, -0.0588, -0.6298, -0.0262,
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+ -0.6083, 0.0065, -0.5868, 0.0396, -0.5643, 0.0731,
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+ -0.5372, 0.1041, -0.5033, 0.1259, -0.4662, 0.1406,
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+ -0.4275, 0.1493, -0.3881, 0.1530, -0.3487, 0.1526,
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+ -0.3095, 0.1488, -0.2708, 0.1421, -0.2319, 0.1342,
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+ -0.1943, 0.1217, -0.1600, 0.1025, -0.1290, 0.0785,
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+ -0.1012, 0.0509, -0.0764, 0.0206, -0.0547, -0.0120,
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+ -0.0378, -0.0472, -0.0324, -0.0857, -0.0389, -0.1241,
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+ -0.0546, -0.1599, -0.0814, -0.1876, -0.1193, -0.1964,
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+ -0.1582, -0.1935, -0.1931, -0.1769, -0.2157, -0.1453,
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+ -0.2290, -0.1085, -0.2327, -0.0697, -0.2240, -0.0317,
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+ -0.2064, 0.0033, -0.1853, 0.0362, -0.1613, 0.0672,
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+ -0.1350, 0.0961, -0.1051, 0.1213, -0.0706, 0.1397,
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+ -0.0332, 0.1512, 0.0053, 0.1580, 0.0442, 0.1624,
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+ 0.0833, 0.1636, 0.1224, 0.1615, 0.1613, 0.1565,
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+ 0.1999, 0.1500, 0.2378, 0.1402, 0.2749, 0.1279,
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+ 0.3118, 0.1147, 0.3487, 0.1015, 0.3858, 0.0892,
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+ 0.4236, 0.0787, 0.4621, 0.0715, 0.5012, 0.0702,
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+ 0.5398, 0.0766, 0.5768, 0.0890, 0.6123, 0.1055,
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+ 0.6466, 0.1244, 0.6805, 0.1440, 0.7147, 0.1630,
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+ 0.7500, 0.1800
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+ ],
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+ [
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+ -0.7500, 0.0000, -0.7033, 0.0195, -0.6569, 0.0399,
|
|
|
+ -0.6104, 0.0600, -0.5634, 0.0789, -0.5155, 0.0954,
|
|
|
+ -0.4667, 0.1089, -0.4174, 0.1206, -0.3676, 0.1299,
|
|
|
+ -0.3174, 0.1365, -0.2669, 0.1398, -0.2162, 0.1391,
|
|
|
+ -0.1658, 0.1347, -0.1157, 0.1271, -0.0661, 0.1169,
|
|
|
+ -0.0170, 0.1046, 0.0316, 0.0903, 0.0791, 0.0728,
|
|
|
+ 0.1259, 0.0534, 0.1723, 0.0331, 0.2188, 0.0129,
|
|
|
+ 0.2656, -0.0064, 0.3122, -0.0263, 0.3586, -0.0466,
|
|
|
+ 0.4052, -0.0665, 0.4525, -0.0847, 0.5007, -0.1002,
|
|
|
+ 0.5497, -0.1130, 0.5991, -0.1240, 0.6491, -0.1325,
|
|
|
+ 0.6994, -0.1380, 0.7500, -0.1400
|
|
|
+ ]
|
|
|
+ ],
|
|
|
+ WIND_OFFSETS = [
|
|
|
+ { start: 0.36, end: 0.11 },
|
|
|
+ { start: 0.56, end: 0.16 }
|
|
|
+ ];
|
|
|
+
|
|
|
+ function leaf(ctx, t, x, y, cw, s, color) {
|
|
|
+ var a = cw / 8,
|
|
|
+ b = a / 3,
|
|
|
+ c = 2 * b,
|
|
|
+ d = (t % 1) * TAU,
|
|
|
+ e = Math.cos(d),
|
|
|
+ f = Math.sin(d);
|
|
|
+
|
|
|
+ ctx.fillStyle = color;
|
|
|
+ ctx.strokeStyle = color;
|
|
|
+ ctx.lineWidth = s;
|
|
|
+ ctx.lineCap = "round";
|
|
|
+ ctx.lineJoin = "round";
|
|
|
+
|
|
|
+ ctx.beginPath();
|
|
|
+ ctx.arc(x, y, a, d, d + Math.PI, false);
|
|
|
+ ctx.arc(x - b * e, y - b * f, c, d + Math.PI, d, false);
|
|
|
+ ctx.arc(x + c * e, y + c * f, b, d + Math.PI, d, true);
|
|
|
+ ctx.globalCompositeOperation = 'destination-out';
|
|
|
+ ctx.fill();
|
|
|
+ ctx.globalCompositeOperation = 'source-over';
|
|
|
+ ctx.stroke();
|
|
|
+ }
|
|
|
+
|
|
|
+ function swoosh(ctx, t, cx, cy, cw, s, index, total, color) {
|
|
|
+ t /= 2500;
|
|
|
+
|
|
|
+ var path = WIND_PATHS[index],
|
|
|
+ a = (t + index - WIND_OFFSETS[index].start) % total,
|
|
|
+ c = (t + index - WIND_OFFSETS[index].end) % total,
|
|
|
+ e = (t + index) % total,
|
|
|
+ b, d, f, i;
|
|
|
+
|
|
|
+ ctx.strokeStyle = color;
|
|
|
+ ctx.lineWidth = s;
|
|
|
+ ctx.lineCap = "round";
|
|
|
+ ctx.lineJoin = "round";
|
|
|
+
|
|
|
+ if (a < 1) {
|
|
|
+ ctx.beginPath();
|
|
|
+
|
|
|
+ a *= path.length / 2 - 1;
|
|
|
+ b = Math.floor(a);
|
|
|
+ a -= b;
|
|
|
+ b *= 2;
|
|
|
+ b += 2;
|
|
|
+
|
|
|
+ ctx.moveTo(
|
|
|
+ cx + (path[b - 2] * (1 - a) + path[b] * a) * cw,
|
|
|
+ cy + (path[b - 1] * (1 - a) + path[b + 1] * a) * cw
|
|
|
+ );
|
|
|
+
|
|
|
+ if (c < 1) {
|
|
|
+ c *= path.length / 2 - 1;
|
|
|
+ d = Math.floor(c);
|
|
|
+ c -= d;
|
|
|
+ d *= 2;
|
|
|
+ d += 2;
|
|
|
+
|
|
|
+ for (i = b; i !== d; i += 2)
|
|
|
+ ctx.lineTo(cx + path[i] * cw, cy + path[i + 1] * cw);
|
|
|
+
|
|
|
+ ctx.lineTo(
|
|
|
+ cx + (path[d - 2] * (1 - c) + path[d] * c) * cw,
|
|
|
+ cy + (path[d - 1] * (1 - c) + path[d + 1] * c) * cw
|
|
|
+ );
|
|
|
+ }
|
|
|
+
|
|
|
+ else
|
|
|
+ for (i = b; i !== path.length; i += 2)
|
|
|
+ ctx.lineTo(cx + path[i] * cw, cy + path[i + 1] * cw);
|
|
|
+
|
|
|
+ ctx.stroke();
|
|
|
+ }
|
|
|
+
|
|
|
+ else if (c < 1) {
|
|
|
+ ctx.beginPath();
|
|
|
+
|
|
|
+ c *= path.length / 2 - 1;
|
|
|
+ d = Math.floor(c);
|
|
|
+ c -= d;
|
|
|
+ d *= 2;
|
|
|
+ d += 2;
|
|
|
+
|
|
|
+ ctx.moveTo(cx + path[0] * cw, cy + path[1] * cw);
|
|
|
+
|
|
|
+ for (i = 2; i !== d; i += 2)
|
|
|
+ ctx.lineTo(cx + path[i] * cw, cy + path[i + 1] * cw);
|
|
|
+
|
|
|
+ ctx.lineTo(
|
|
|
+ cx + (path[d - 2] * (1 - c) + path[d] * c) * cw,
|
|
|
+ cy + (path[d - 1] * (1 - c) + path[d + 1] * c) * cw
|
|
|
+ );
|
|
|
+
|
|
|
+ ctx.stroke();
|
|
|
+ }
|
|
|
+
|
|
|
+ if (e < 1) {
|
|
|
+ e *= path.length / 2 - 1;
|
|
|
+ f = Math.floor(e);
|
|
|
+ e -= f;
|
|
|
+ f *= 2;
|
|
|
+ f += 2;
|
|
|
+
|
|
|
+ leaf(
|
|
|
+ ctx,
|
|
|
+ t,
|
|
|
+ cx + (path[f - 2] * (1 - e) + path[f] * e) * cw,
|
|
|
+ cy + (path[f - 1] * (1 - e) + path[f + 1] * e) * cw,
|
|
|
+ cw,
|
|
|
+ s,
|
|
|
+ color
|
|
|
+ );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ var Skycons = function (opts) {
|
|
|
+ this.list = [];
|
|
|
+ this.interval = null;
|
|
|
+ this.color = opts && opts.color ? opts.color : "black";
|
|
|
+ this.resizeClear = !!(opts && opts.resizeClear);
|
|
|
+ };
|
|
|
+
|
|
|
+ Skycons.CLEAR_DAY = function (ctx, t, color) {
|
|
|
+ var w = ctx.canvas.width,
|
|
|
+ h = ctx.canvas.height,
|
|
|
+ s = Math.min(w, h);
|
|
|
+
|
|
|
+ sun(ctx, t, w * 0.5, h * 0.5, s, s * STROKE, color);
|
|
|
+ };
|
|
|
+
|
|
|
+ Skycons.CLEAR_NIGHT = function (ctx, t, color) {
|
|
|
+ var w = ctx.canvas.width,
|
|
|
+ h = ctx.canvas.height,
|
|
|
+ s = Math.min(w, h);
|
|
|
+
|
|
|
+ moon(ctx, t, w * 0.5, h * 0.5, s, s * STROKE, color);
|
|
|
+ };
|
|
|
+
|
|
|
+ Skycons.PARTLY_CLOUDY_DAY = function (ctx, t, color) {
|
|
|
+ var w = ctx.canvas.width,
|
|
|
+ h = ctx.canvas.height,
|
|
|
+ s = Math.min(w, h);
|
|
|
+
|
|
|
+ sun(ctx, t, w * 0.625, h * 0.375, s * 0.75, s * STROKE, color);
|
|
|
+ cloud(ctx, t, w * 0.375, h * 0.625, s * 0.75, s * STROKE, color);
|
|
|
+ };
|
|
|
+
|
|
|
+ Skycons.PARTLY_CLOUDY_NIGHT = function (ctx, t, color) {
|
|
|
+ var w = ctx.canvas.width,
|
|
|
+ h = ctx.canvas.height,
|
|
|
+ s = Math.min(w, h);
|
|
|
+
|
|
|
+ moon(ctx, t, w * 0.667, h * 0.375, s * 0.75, s * STROKE, color);
|
|
|
+ cloud(ctx, t, w * 0.375, h * 0.625, s * 0.75, s * STROKE, color);
|
|
|
+ };
|
|
|
+
|
|
|
+ Skycons.CLOUDY = function (ctx, t, color) {
|
|
|
+ var w = ctx.canvas.width,
|
|
|
+ h = ctx.canvas.height,
|
|
|
+ s = Math.min(w, h);
|
|
|
+
|
|
|
+ cloud(ctx, t, w * 0.5, h * 0.5, s, s * STROKE, color);
|
|
|
+ };
|
|
|
+
|
|
|
+ Skycons.RAIN = function (ctx, t, color) {
|
|
|
+ var w = ctx.canvas.width,
|
|
|
+ h = ctx.canvas.height,
|
|
|
+ s = Math.min(w, h);
|
|
|
+
|
|
|
+ rain(ctx, t, w * 0.5, h * 0.37, s * 0.9, s * STROKE, color);
|
|
|
+ cloud(ctx, t, w * 0.5, h * 0.37, s * 0.9, s * STROKE, color);
|
|
|
+ };
|
|
|
+
|
|
|
+ Skycons.SLEET = function (ctx, t, color) {
|
|
|
+ var w = ctx.canvas.width,
|
|
|
+ h = ctx.canvas.height,
|
|
|
+ s = Math.min(w, h);
|
|
|
+
|
|
|
+ sleet(ctx, t, w * 0.5, h * 0.37, s * 0.9, s * STROKE, color);
|
|
|
+ cloud(ctx, t, w * 0.5, h * 0.37, s * 0.9, s * STROKE, color);
|
|
|
+ };
|
|
|
+
|
|
|
+ Skycons.SNOW = function (ctx, t, color) {
|
|
|
+ var w = ctx.canvas.width,
|
|
|
+ h = ctx.canvas.height,
|
|
|
+ s = Math.min(w, h);
|
|
|
+
|
|
|
+ snow(ctx, t, w * 0.5, h * 0.37, s * 0.9, s * STROKE, color);
|
|
|
+ cloud(ctx, t, w * 0.5, h * 0.37, s * 0.9, s * STROKE, color);
|
|
|
+ };
|
|
|
+
|
|
|
+ Skycons.WIND = function (ctx, t, color) {
|
|
|
+ var w = ctx.canvas.width,
|
|
|
+ h = ctx.canvas.height,
|
|
|
+ s = Math.min(w, h);
|
|
|
+
|
|
|
+ swoosh(ctx, t, w * 0.5, h * 0.5, s, s * STROKE, 0, 2, color);
|
|
|
+ swoosh(ctx, t, w * 0.5, h * 0.5, s, s * STROKE, 1, 2, color);
|
|
|
+ };
|
|
|
+
|
|
|
+ Skycons.FOG = function (ctx, t, color) {
|
|
|
+ var w = ctx.canvas.width,
|
|
|
+ h = ctx.canvas.height,
|
|
|
+ s = Math.min(w, h),
|
|
|
+ k = s * STROKE;
|
|
|
+
|
|
|
+ fogbank(ctx, t, w * 0.5, h * 0.32, s * 0.75, k, color);
|
|
|
+
|
|
|
+ t /= 5000;
|
|
|
+
|
|
|
+ var a = Math.cos((t) * TAU) * s * 0.02,
|
|
|
+ b = Math.cos((t + 0.25) * TAU) * s * 0.02,
|
|
|
+ c = Math.cos((t + 0.50) * TAU) * s * 0.02,
|
|
|
+ d = Math.cos((t + 0.75) * TAU) * s * 0.02,
|
|
|
+ n = h * 0.936,
|
|
|
+ e = Math.floor(n - k * 0.5) + 0.5,
|
|
|
+ f = Math.floor(n - k * 2.5) + 0.5;
|
|
|
+
|
|
|
+ ctx.strokeStyle = color;
|
|
|
+ ctx.lineWidth = k;
|
|
|
+ ctx.lineCap = "round";
|
|
|
+ ctx.lineJoin = "round";
|
|
|
+
|
|
|
+ line(ctx, a + w * 0.2 + k * 0.5, e, b + w * 0.8 - k * 0.5, e);
|
|
|
+ line(ctx, c + w * 0.2 + k * 0.5, f, d + w * 0.8 - k * 0.5, f);
|
|
|
+ };
|
|
|
+
|
|
|
+ Skycons.prototype = {
|
|
|
+ _determineDrawingFunction: function (draw) {
|
|
|
+ if (typeof draw === "string")
|
|
|
+ draw = Skycons[draw.toUpperCase().replace(/-/g, "_")] || null;
|
|
|
+
|
|
|
+ return draw;
|
|
|
+ },
|
|
|
+ add: function (el, draw) {
|
|
|
+ var obj;
|
|
|
+
|
|
|
+ if (typeof el === "string")
|
|
|
+ el = document.getElementById(el);
|
|
|
+
|
|
|
+ // Does nothing if canvas name doesn't exists
|
|
|
+ if (el === null || el === undefined)
|
|
|
+ return;
|
|
|
+
|
|
|
+ draw = this._determineDrawingFunction(draw);
|
|
|
+
|
|
|
+ // Does nothing if the draw function isn't actually a function
|
|
|
+ if (typeof draw !== "function")
|
|
|
+ return;
|
|
|
+
|
|
|
+ obj = {
|
|
|
+ element: el,
|
|
|
+ context: el.getContext("2d"),
|
|
|
+ drawing: draw
|
|
|
+ };
|
|
|
+
|
|
|
+ this.list.push(obj);
|
|
|
+ this.draw(obj, KEYFRAME);
|
|
|
+ },
|
|
|
+ set: function (el, draw) {
|
|
|
+ var i;
|
|
|
+
|
|
|
+ if (typeof el === "string")
|
|
|
+ el = document.getElementById(el);
|
|
|
+
|
|
|
+ for (i = this.list.length; i--;)
|
|
|
+ if (this.list[i].element === el) {
|
|
|
+ this.list[i].drawing = this._determineDrawingFunction(draw);
|
|
|
+ this.draw(this.list[i], KEYFRAME);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ this.add(el, draw);
|
|
|
+ },
|
|
|
+ remove: function (el) {
|
|
|
+ var i;
|
|
|
+
|
|
|
+ if (typeof el === "string")
|
|
|
+ el = document.getElementById(el);
|
|
|
+
|
|
|
+ for (i = this.list.length; i--;)
|
|
|
+ if (this.list[i].element === el) {
|
|
|
+ this.list.splice(i, 1);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ },
|
|
|
+ draw: function (obj, time) {
|
|
|
+ var canvas = obj.context.canvas;
|
|
|
+
|
|
|
+ if (this.resizeClear)
|
|
|
+ canvas.width = canvas.width;
|
|
|
+
|
|
|
+ else
|
|
|
+ obj.context.clearRect(0, 0, canvas.width, canvas.height);
|
|
|
+
|
|
|
+ obj.drawing(obj.context, time, this.color);
|
|
|
+ },
|
|
|
+ play: function () {
|
|
|
+ var self = this;
|
|
|
+
|
|
|
+ this.pause();
|
|
|
+ this.interval = requestInterval(function () {
|
|
|
+ var now = Date.now(),
|
|
|
+ i;
|
|
|
+
|
|
|
+ for (i = self.list.length; i--;)
|
|
|
+ self.draw(self.list[i], now);
|
|
|
+ }, 1000 / 60);
|
|
|
+ },
|
|
|
+ pause: function () {
|
|
|
+ if (this.interval) {
|
|
|
+ cancelInterval(this.interval);
|
|
|
+ this.interval = null;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ };
|
|
|
+
|
|
|
+ global.Skycons = Skycons;
|
|
|
+}(this));
|
Help-14