function fint( ww, yii, aii, bii, r ) {
	var yyi = ( ( bii - aii ) * yii ) + bii + aii;
	var out = exp( -yyi * yyi * 0.125 );
	out *= pow( apnorm( yyi * 0.5 ) -
		apnorm( ( yyi - (2*ww) ) * 0.5 ), r - 1 );
	return out;
}
Evaluates a Gauss-Legendre quadrature.

@private
@param {number} ww - quadrature point
@param {number} yii - integral bound
@param {number} aii - integral bound
@param {number} bii - integral bound
@param {number} r - relative error tolerance
@returns {number} integral value