beezy

this modules solves amplitude over time for bezier curves with any amount of control points (any scale).

It was designed for use creating audio envelopes. See entry.js for an example that uses this module to draw an envelope. To see the example in action, serve the public folder on localhost, and load index.html in your browser.

changelog

as of version 1, the solver returns the vector [x,y], whereas previous it returned only y, and not only that, it was f(x) not f(t) heh

usage

Note that bezier functions operate in the normalized space 0 <= t <= 1, ergo this module does as well. See also modules normalize-time and nvelope.

Initiate the solver function with a rayray of control point coordinates:

var solver = require('beezy')

//  the coordinates
var curves = [[0,0], [.05, 1],[.75, .5],  [1,0]]

var solve = solver(curves)

for(var t = 0; t < 100; t++){
  var xy = solve(t/100) // [.25, .67]
}