Day: August 23, 2022

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Adopt Site Reliability Engineering to Win

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The coronavirus pandemic accelerated the offering of online services even in the most traditionally "offline" sectors: fitness, banking, retail, and government. 

As more companies started moving their offerings online, the reliability of these critical services has garnered particular attention from the public. In early July, Rogers, a Canadian telecom behemoth, experienced an outage that lasted 19 hours, disrupting internet and telecom services for over 10 million Canadians. For the duration of the incident, critical services, 911, and hospitals were interrupted. 

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Custom SVG Cursors with an Interactive Emitter Effect

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From the custom cursor on my portfolio marvinx.com using blurred SVG circles, I created several variations which I would like to share with you today.

Without going into too much detail, I’d like to explain some points on how I approached the making of this set.

For the demos, the idea is to set a main class grouping all the functions inherent to all cursors.

Then, I separate demos in different classes where each variable is configurable: number of particles, colors, size, gradient, opacity, filters, radius, speed, acceleration, direction, etc.

Everything is coded in native JavaScript and does not use any libraries (only d3.js if we want to sort particles).

This is how particles are drawn in the Cursor class:

  drawParticles() {
    return `<g class="particles" filter=${this.filterParticles || "none"}>
      ${(() => {
        if (this.strokeGradient) {
          return `
          <defs>
            <linearGradient id=${this.strokeGradient.idStrokeGradient} x1="0%" y1="0%" x2="0%" y2="100%">
              <stop offset="0%" stop-color=${this.strokeGradient.color1} />
              <stop offset="100%" stop-color=${this.strokeGradient.color2} />
            </linearGradient>
          </defs>`
        }
      })()}
      ${Array(this.nbrParticles).fill().map((_,i) =>
        `<circle
          r="${this.setRadiusParticles(i)}"
          cx=${this.pos.x} cy=${this.pos.y}
          fill="${this.fillParticles || "none"}"
          fill-opacity="${this.fillOpacityParticles || 1}"
          stroke="${this.strokeGradient ? `url(#${this.strokeGradient.idStrokeGradient})` : this.strokeColorParticles}"
          stroke-width="${this.strokeWidthParticles || 0}"
          stroke-opacity="${this.strokeOpacityParticles || 1}"
          id="${i}">
        </circle>`).join('')}
    </g>`
  }

This is how each parameter is then configured:

export class Cursor1 extends Cursors{

  constructor(index) {
    super(index);
    this.speed = !isTouchDevices ? 0.5 : 1;
    this.init();
    this.loop();
  }

  setParamsCursor() {
    this.radiusCursor = 15;
    this.fillCursor = getComputedStyle(document.body).getPropertyValue('--primary');
    this.maxSqueeze = 0.6;
    this.accelerator = 1000;
  }

  setParamsParticles() {
    this.strokeGradient = {
      idStrokeGradient : "gradient",
      color2 : getComputedStyle(document.body).getPropertyValue('--primary'),
      color1 : getComputedStyle(document.body).getPropertyValue('--secondary'),
    }
    this.strokeWidthParticles = 1.5;
    this.strokeOpacityParticles = .15;
    this.radiusDiff = 7;
    this.radiusStart = this.radiusCursor*3;
    this.nbrParticles = Math.round((this.diagonalWindow() + this.radiusDiff - this.radiusStart) / this.radiusDiff);
    this.transitionParticles = {
      duration: 18,
      delay: !isTouchDevices ? 4 : 14,
      easing : "linear"
    };
  }
}

1. Waves effect

2. Trail effect

3. Tube effect

4.Mask effect

On this last demo, I use twice the same superimposed video (from Mikhail Nilov‘s beautiful royalty free collection).

The first video uses a grayscale filter:

  filterImageBack() {
    return
    `<filter id=${this.filterBackId}>
      <feColorMatrix type="matrix" values=".33 .33 .33 0 0
        .33 .33 .33 0 0
        .33 .33 .33 0 0
        0 0 0 1 0">
      </feColorMatrix>
    </filter>`
  }

And the second one is placed inside a mask where I apply a duotone filter:

  filterImageCursor() {
    return 
     `<filter id=${this.filterCursorId} filterUnits="objectBoundingBox" primitiveUnits="userSpaceOnUse" color-interpolation-filters="sRGB">
      <feColorMatrix type="matrix" values=".44 .44 .44 0 0
        .44 .44 .44 0 0
        .44 .44 .44 0 0
        0 0 0 1 0">
      </feColorMatrix>
      <feComponentTransfer color-interpolation-filters="sRGB" result="duotone">
        <feFuncR type="table" tableValues="0.55 0.25"></feFuncR>
        <feFuncG type="table" tableValues="0.06 1"></feFuncG>
        <feFuncB type="table" tableValues="0.93 0.91"></feFuncB>
        <feFuncA type="table" tableValues="0 1"></feFuncA>
      </feComponentTransfer>
    </filter>`
  }

I also thank Ghislain Auzillon, for his help on the design.

Hope you enjoy it!