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changes specific to transitivebullsh.it
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,135 @@ | ||
| import raf from 'raf' | ||
| import random from 'random' | ||
| import React, { Component } from 'react' | ||
| import FluidAnimation from 'react-fluid-animation' | ||
|
|
||
| const exp = random.exponential() | ||
| const numSplatsPerEpoch = 1 | ||
| const minSplatRadius = 0.01 | ||
| const maxSplatRadius = 0.03 | ||
|
|
||
| export class HeroHeader extends Component<{ | ||
| className?: string | ||
| }> { | ||
| _time: number = Date.now() | ||
| _direction: number | ||
| _tickRaf: any | ||
| _timeout: any | ||
| _animation: any | ||
|
|
||
| componentDidMount() { | ||
| this._time = Date.now() | ||
| this._direction = 1 | ||
| this._reset() | ||
| this._tick() | ||
| } | ||
|
|
||
| componentWillUnmount() { | ||
| if (this._tickRaf) { | ||
| raf.cancel(this._tickRaf) | ||
| this._tickRaf = null | ||
| } | ||
|
|
||
| if (this._timeout) { | ||
| clearTimeout(this._timeout) | ||
| this._timeout = null | ||
| } | ||
| } | ||
|
|
||
| render() { | ||
| return ( | ||
| <FluidAnimation | ||
| className={this.props.className} | ||
| animationRef={this._animationRef} | ||
| /> | ||
| ) | ||
| } | ||
|
|
||
| _animationRef = (ref) => { | ||
| this._animation = ref | ||
| this._reset() | ||
| } | ||
|
|
||
| _reset() { | ||
| if (this._animation) { | ||
| this._animation.config.splatRadius = random.float( | ||
| minSplatRadius, | ||
| maxSplatRadius | ||
| ) | ||
| this._animation.addRandomSplats(random.int(100, 180)) | ||
| } | ||
| } | ||
|
|
||
| _tick = () => { | ||
| this._tickRaf = null | ||
| this._timeout = null | ||
|
|
||
| let scale = 1.0 | ||
|
|
||
| if (this._animation) { | ||
| const w = this._animation.width | ||
| const h = this._animation.height | ||
|
|
||
| // adjust the intensity scale depending on the canvas width, so it's less | ||
| // intense on smaller screens | ||
| const s = Math.max(0.1, Math.min(1, w / 1200)) | ||
| scale = Math.pow(s, 1.2) | ||
|
|
||
| this._animation.config.splatRadius = random.float( | ||
| minSplatRadius * scale, | ||
| maxSplatRadius * scale | ||
| ) | ||
|
|
||
| const splats = [] | ||
| for (let i = 0; i < numSplatsPerEpoch; ++i) { | ||
| const color = [random.float(10), random.float(10), random.float(10)] | ||
|
|
||
| const w0 = w / 3.0 | ||
| const w1 = (w * 2.0) / 3.0 | ||
|
|
||
| const h0 = h / 3.0 | ||
| const h1 = (h * 2.0) / 3.0 | ||
|
|
||
| // eslint-disable-next-line no-constant-condition | ||
| while (true) { | ||
| const x = random.float(w) | ||
| const y = random.float(h) | ||
|
|
||
| // favor uniformly distributed samples within the center-ish of the canvas | ||
| if (x > w0 && x < w1 && y > h0 && y < h1) { | ||
| continue | ||
| } | ||
|
|
||
| const dx = random.float(-1, 1) * random.float(200, 3000) * scale | ||
| const dy = random.float(-1, 1) * random.float(200, 3000) * scale | ||
| const splat = { x, y, dx, dy, color } | ||
| splats.push(splat) | ||
| break | ||
| } | ||
|
|
||
| // old version which generated samples along a circle | ||
| // const t = random.float(2 * Math.PI) | ||
| // const cos = Math.cos(t) | ||
| // const sin = Math.sin(t) | ||
| // const x = w / 2 + r * cos | ||
| // const y = h / 2 + r * sin + yOffset | ||
| // const k = random.float() > 0.98 ? random.float(3, 10) : 1 | ||
| // const dx = k * random.float(-1, 1) * random.float(50, 300) * cos | ||
| // const dy = k * random.float(-1, 1) * random.float(50, 300) * sin | ||
| // const splat = { x, y, dx, dy, color } | ||
| // splats.push(splat) | ||
| } | ||
|
|
||
| this._animation.addSplats(splats) | ||
| } | ||
|
|
||
| // using an exponential distribution here allows us to favor bursts of activity | ||
| // but also allow for more occasional pauses | ||
| const dampenedScale = Math.pow(scale, 0.2) | ||
| const timeout = (exp() * 100) / dampenedScale | ||
|
|
||
| this._timeout = setTimeout(() => { | ||
| this._tickRaf = raf(this._tick) | ||
| }, timeout) | ||
| } | ||
| } |
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This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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