example/threejs/asset/three.js
function() {

		var EPS = 0.000001;
		this.phi = Math.max( EPS, Math.min( Math.PI - EPS, this.phi ) );

		return this;

	}
function() {

		var EPS = 0.000001;
		this.phi = Math.max( EPS, Math.min( Math.PI - EPS, this.phi ) );

		return this;

	}
function ( ) { var EPS = 0.000001 ; this . phi = Math . max ( EPS , Math . min ( Math . PI - EPS , this . phi ) ) ; return this ; }
restrict phi to be betwee EPS and PI-EPS
restrict phi to be betwee EPS and PI - EPS