genish.js/js/env.js

gen~ in js

'use strict'

let gen     = require( './gen' ),
    windows = require( './windows' ),
    data    = require( './data' ),
    peek    = require( './peek' ),
    phasor  = require( './phasor' ),
    defaults = {
      type:'triangular', length:1024, alpha:.15, shift:0, reverse:false 
    }

module.exports = props => {
  
  let properties = Object.assign( {}, defaults, props )
  let buffer = new Float32Array( properties.length )

  let name = properties.type + '_' + properties.length + '_' + properties.shift + '_' + properties.reverse + '_' + properties.alpha
  if( typeof gen.globals.windows[ name ] === 'undefined' ) { 

    for( let i = 0; i < properties.length; i++ ) {
      buffer[ i ] = windows[ properties.type ]( properties.length, i, properties.alpha, properties.shift )
    }

    if( properties.reverse === true ) { 
      buffer.reverse()
    }
    gen.globals.windows[ name ] = data( buffer )
  }

  let ugen = gen.globals.windows[ name ] 
  ugen.name = 'env' + gen.getUID()

  return ugen
}