pointergeometry

PointerGeometry3000

A simple little utility that makes it easy to work with values calculated from the pointer's location relative to one or multiple defined points. 🙋🏼

🍒 VISIT THE PROJECT (MINI DEMO) WEBSITE

Why?

I experiment a lot with interactive graphics and interaction in general, and have found that I often have to calculate this and that, particularly the distance and angle from (a) specific point(s). I decided to make this little utility so I can just plop it in and start trying things out.

While the output is very 'basic', I found that what can be done with them when used to manipulate things are endless. I hope you find this stirring your creativity and imagination. Lots of possibilities!

💅🏾 THE PROJECT SITE IS A MINI DEMO

More demos coming soon (mocking 3d, AppleTV rotating cards, etc)

How?

Simply call PointerGeometry3000. This will create a global variable PointerGeometry which contains points. Values are updated onMouseMove by default (see available settings below).

  // Initialize
  PointerGeometry();

If initialised without arguments it will simply register the center of the viewport as its one and only reference point. The default name of this auto-created point is pointA. If you do a console.log(PointerGeometry('pointA') after initialisation, you will find that a point object contains the following data:

  // Sample data
  pointA: {
    cx: 640, // (centerX, reference)
    cy: 333, // (centerY, reference)
    deg: 43.42633594589745, // (degrees),
    hyp: 426.8480408763756 // (distance from reference)
    rad: 0.7579325443330766, // (radians)
    x: 187 // (positionX),
    y: 177 // (positionY)
  }

But you probably want to define specific points of reference, have multiple and even name them for convenience, so you'd want to initialize it like so:

  // We initialize with multiple points
  PointerGeometry({
    points: {
      aNicelyNamedPoint: {
        cx: 200, // coordinate in pixels relative to viewport
        cy: 200
      },
      anotherPoint: {
        cx: 'center', // you can just pass 'center' for center of viewport
        cy: 'center' // you can just pass 'center' for center of viewport
      },
      goCrazy: {
        cx: 450
        cy: 620
      }
    },
    initialPos: { pageX: 200, pageY: 200 }, // (optional) registered 'mouse position' immediately on init. defaults to center
    listener: 'mousemove', // (optional, default: mousemove) event to listen to when updating values
    console: true // (optional) set to true if you want a console with values to be shown
  });

So how do you get a specific point's particular value? You just do: PointerGeometry(pointName).propertyKey

  // Get a specific point's value
  var distanceFromReference = PointerGeometry('aNicelyNamedPoint').hyp;
  var angleInDegrees = PointerGeometry('aNicelyNamedPoint').deg;
  // ... so on

You can also access all points via PointerGeometry.points.

Notes

• If manipulating DOM elements, it is still best to use transforms as they are way more performant than manipulating e.g. width and height.
• Having console: true or having inspector open (as you already know) will reduce performance as it will be updating values, recording timelines, highlighting updated DOM elements what have you.

Plans

• More values e.g. adjacent, opposite and corresponding angles
• point relative to a parent element
• any suggestions?

Say Hi!

Please do. If you have any comments or suggestions, i'd love to hear them. This utility is completely free but if you have used it for something cool please do let me know, let me see what you've made! Drop me a line at [e-mail] or via @the_ezekiel on Twitter!

P.S. Follow me on twitter!

License

This project is licensed under the MIT License - see the LICENSE.md file for details