points-to-vertices

:white_square_button: a points to vertices array convertor

Usage

import pointsToVertices from 'points-to-vertices';

const points = [
  {
    x: 1,
    y: 1,
    z: 1,
    color: `rgba(255, 0, 0, .3)`
  },
  {
    x: 1,
    y: - 1,
    z: 0,
    color: `#FF0000`
  }
];

const vertices = pointsToVertices(points);
console.log(vertices);
// > [1, 1, 1,  1, 0, 0, .3,  1, -1, 0,  1, 0, 0, 1]

Each point can have x, y, z and color (vec4, hex, rgb or rgba) properties points-to-vertices fills in the blanks with (provided) defaults.

result is an array of vertices

[

  // point 1
  1, 1, 1,      // x, y, z
  1, 0, 0, .3,  // r, g, b, a

  // point 2
  1, -1, 0,     // x, y, z
  1, 0, 0, 1    // r, g, b, a

]

Installation

Install via yarn

yarn add points-to-vertices (--dev)

or npm

npm install points-to-vertices (--save-dev)

configuration

You can pass in extra options as a configuration object (all parameters are optional)

import pointsToVertices from 'points-to-vertices';

const points = [
  {
    x: -1,
    y: 0,
    z: 0,
    color: `rgba(255, 0, 0, .3)`
  },
  {
    x: 0,
    y: - 1,
  }
];

const vertices = pointsToVertices(points, {
  meta: true, // wrap the data in an object
  color: false // no colors in result vertices array, only points
  dx: 1, // default x
  dy: 1, // default y
  dz: - 1, // default z
  dcolor: `#FFFF00` // default color
});

➖ color ( boolean ) ✏️ true 📝 output colors in vertices array ℹ️ false => [x, y, z] vertex ℹ️ true => [x, y, z, r, g, b, a] vertex (default)

➖ meta ( boolean ) ✏️ false 📝 wrap the result in an object (with a meta property) ℹ️ returns extra info on vertices, start and end of position, color, total length ℹ️ meta: false returns a simple vertices array

example output with meta: true (annotated for clarity)

{

  data: [

  	// point 1
  	0, 0, 1,     // position (x, y, z)
  	0, 1, 1, 1,  // color (r, g, b, a)

  	// point 2
  	1, - 1, 0,    // position (x, y, z)
  	0, 1, 1, 1   // color (r, g, b, a)

  ],

  meta: {

   	// each vertex is 7 long
   	vertexLength: 7,

    // there are 2 vertices in this array
   	amount: 2,

   	// position is 3 long, starts at index 0
    position: { start: 0, length: 3 },

    // color is 4 long, starts at index 3
    color: { start: 3, length: 4 }
  }

}

you can pass in default values for x, y, z and color if no value is set for x, y, z, or color, points-to-vertices will use the default

➖ dx ( number ) ✏️ 0 📝 default x for a vertex

➖ dy ( number ) ✏️ 0 📝 default y for a vertex

➖ dz ( number ) ✏️ 0 📝 default z for a vertex

➖ dcolor ( vec4 | string ) ✏️ [0, 0, 0, 1] (black) 📝 default z for a vertex

Examples

See example folder

Builds

If you don't use a package manager, you can access points-to-vertices via unpkg (CDN), download the source, or point your package manager to the url.

points-to-vertices is compiled as a collection of CommonJS modules & [ES2015 modules](http://www.2ality.com/2014/0 -9/es6-modules-final.html) for bundlers that support the jsnext:main or module field in package.json (Rollup, Webpack 2)

The points-to-vertices package includes precompiled production and development UMD builds in the dist folder. They can be used directly without a bundler and are thus compatible with many popular JavaScript module loaders and environments. You can drop a UMD build as a <script> tag on your page. The UMD builds make points-to-vertices available as a window.pointsToVertices global variable.

License

The code is available under the MIT license.

Contributing

We are open to contributions, see CONTRIBUTING.md for more info.

Misc

This module was created using generator-module-boilerplate.