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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,72 +1,83 @@ | ||
| var __ribbonsrc__ = { | ||
| z: -1, | ||
| alpha: 0.9, | ||
| size: 120 | ||
| } | ||
|
|
||
| var c = document.createElement('canvas'), | ||
| c2d = c.getContext('2d'), | ||
| pr = window.devicePixelRatio || 1, | ||
| width = window.innerWidth, | ||
| height = window.innerHeight, | ||
| s = __ribbonsrc__.size, | ||
| q, | ||
| m = Math, | ||
| r = 0, | ||
| pi = m.PI * 2, | ||
| cos = m.cos, | ||
| randoMath = m.random | ||
| function wrap(params) { | ||
| var __ribbonsrc__ = { | ||
| z: -1, | ||
| alpha: 0.9, | ||
| size: 120 | ||
| } | ||
|
|
||
| c.width = width * pr | ||
| c.height = height * pr | ||
| c.style.cssText = | ||
| 'opacity: ' + | ||
| __ribbonsrc__.alpha + | ||
| ';position:fixed;top:0;left:0;z-index: ' + | ||
| __ribbonsrc__.z + | ||
| ';width:100%;height:100%;pointer-events:none;' | ||
| var c = document.createElement('canvas'), | ||
| c2d = c.getContext('2d'), | ||
| pr = window.devicePixelRatio || 1, | ||
| width = window.innerWidth, | ||
| height = window.innerHeight, | ||
| s = __ribbonsrc__.size, | ||
| q, | ||
| m = Math, | ||
| r = 0, | ||
| pi = m.PI * 2, | ||
| cos = m.cos, | ||
| randoMath = m.random | ||
|
|
||
| c2d.scale(pr, pr) | ||
| c2d.globalAlpha = __ribbonsrc__.alpha | ||
| c.className = 'sagiri-ribbons' | ||
| c.width = width * pr | ||
| c.height = height * pr | ||
| c.style.cssText = | ||
| 'opacity: ' + | ||
| __ribbonsrc__.alpha + | ||
| ';position:fixed;top:0;left:0;z-index: ' + | ||
| __ribbonsrc__.z + | ||
| ';width:100%;height:100%;pointer-events:none;' | ||
|
|
||
| document.getElementsByTagName('body')[0].appendChild(c) | ||
| c2d.scale(pr, pr) | ||
| c2d.globalAlpha = __ribbonsrc__.alpha | ||
|
|
||
| function redraw() { | ||
| c2d.clearRect(0, 0, width, height) | ||
| q = [{ x: 0, y: height * 0.7 + s }, { x: 0, y: height * 0.7 - s }] | ||
| while (q[1].x < width + s) draw(q[0], q[1]) | ||
| } | ||
| document.getElementsByTagName('body')[0].appendChild(c) | ||
|
|
||
| function draw(i, j) { | ||
| c2d.beginPath() | ||
| c2d.moveTo(i.x, i.y) | ||
| c2d.lineTo(j.x, j.y) | ||
| var k = j.x + (randoMath() * 2 - 0.25) * s, | ||
| n = line(j.y) | ||
| c2d.lineTo(k, n) | ||
| c2d.closePath() | ||
| r -= pi / -50 | ||
| c2d.fillStyle = | ||
| '#' + | ||
| ( | ||
| ((cos(r) * 127 + 128) << 16) | | ||
| ((cos(r + pi / 3) * 127 + 128) << 8) | | ||
| (cos(r + (pi / 3) * 2) * 127 + 128) | ||
| ).toString(16) | ||
| c2d.fill() | ||
| q[0] = q[1] | ||
| q[1] = { x: k, y: n } | ||
| } | ||
|
|
||
| function line(p) { | ||
| var t = p + (randoMath() * 2 - 1.1) * s | ||
| return t > height || t < 0 ? line(p) : t | ||
| } | ||
|
|
||
| function draw(i, j) { | ||
| c2d.beginPath() | ||
| c2d.moveTo(i.x, i.y) | ||
| c2d.lineTo(j.x, j.y) | ||
| var k = j.x + (randoMath() * 2 - 0.25) * s, | ||
| n = line(j.y) | ||
| c2d.lineTo(k, n) | ||
| c2d.closePath() | ||
| r -= pi / -50 | ||
| c2d.fillStyle = | ||
| '#' + | ||
| ( | ||
| ((cos(r) * 127 + 128) << 16) | | ||
| ((cos(r + pi / 3) * 127 + 128) << 8) | | ||
| (cos(r + (pi / 3) * 2) * 127 + 128) | ||
| ).toString(16) | ||
| c2d.fill() | ||
| q[0] = q[1] | ||
| q[1] = { x: k, y: n } | ||
| } | ||
|
|
||
| function line(p) { | ||
| var t = p + (randoMath() * 2 - 1.1) * s | ||
| return t > height || t < 0 ? line(p) : t | ||
| return { | ||
| redraw() { | ||
| const _el = document.getElementsByClassName('sagiri-ribbons')[0]; | ||
| if (_el) { | ||
| c2d = _el.getContext('2d') | ||
| } | ||
| c2d.clearRect(0, 0, width, height) | ||
| q = [{ x: 0, y: height * 0.7 + s }, { x: 0, y: height * 0.7 - s }] | ||
| while (q[1].x < width + s) draw(q[0], q[1]) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| function ribbons() { | ||
| document.onclick = redraw | ||
| document.ontouchstart = redraw | ||
| redraw() | ||
| document.onclick = wrap.redraw | ||
| document.ontouchstart = wrap.redraw | ||
| wrap().redraw() | ||
| } | ||
|
|
||
| export default ribbons |
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