code: function MeshToonMaterial( parameters ) {
  
  	MeshPhongMaterial.call( this );
  
  	this.defines = { 'TOON': '' };
  
  	this.type = 'MeshToonMaterial';
  
  	this.gradientMap = null;
  
  	this.setValues( parameters );
  
  }
docs: @author takahirox / http://github.com/takahirox
  
  parameters = {
  gradientMap: new THREE.Texture( <Image> )
  }