busola

Track along polyline by generating events in response to position changes.

Installation

Install with component(1):

$ component install furkot/busola

API

var busola = require('busola')(legs);
 
busola
  .on('lost', function() {
    console.log('Not sure where to go');
  })
  .on('turn', function() {
    console.log('turn now!')
  })
 
busola.update(positon)

Basic data structures

• point - is an Array [x, y] - first element represents the latitude, second -- longitude
• leg is a line segment described by 2 points from and to

busola(legs)

Create a busola with a polyline represented by legs Array.

update(position)

Notify busola about the new position One or more events can be generated as the result of updating the position

Events

lost

Generate is busola have no idea where you are related to polyline. Usually means you are to far away.

follow(leg, distance)

Follow the current leg, the next leg will start in distance (meters).

turn(prev, next, distance)

You are at the turning point - you were following the prev leg, but now it's time to follow the next leg (for at least a distance meters.)

License

The MIT License (MIT)

Copyright (c) 2014

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.