nl_tokens: inverseSHT implements the inverse SHT from SH coefficients
pl_tokens: function ( coeffs , aziElev ) { var aziElevR = aziElev ; var N = Math . sqrt ( coeffs . length ) - 1 ; // SH sampling matrix var Y_N = computeRealSH ( N , aziElev ) ; // reconstruction var data = numeric . dotVM ( coeffs , Y_N ) ; // gather in data matrix for ( var i = 0 ; i < aziElev . length ; i ++ ) { aziElevR [ i ] [ 2 ] = <mask> [ i ] ; } return aziElevR ; }