Function calculateLight

Three.js/js/Three56.js:13797–13837

( position, normal, color )

		}

		function calculateLight( position, normal, color ) {

			for ( var l = 0, ll = _lights.length; l < ll; l ++ ) {

				var light = _lights[ l ];

				_lightColor.copy( light.color );

				if ( light instanceof THREE.DirectionalLight ) {

					var lightPosition = _vector3.getPositionFromMatrix( light.matrixWorld ).normalize();

					var amount = normal.dot( lightPosition );

					if ( amount <= 0 ) continue;

					amount *= light.intensity;

					color.add( _lightColor.multiplyScalar( amount ) );

				} else if ( light instanceof THREE.PointLight ) {

					var lightPosition = _vector3.getPositionFromMatrix( light.matrixWorld );

					var amount = normal.dot( _vector3.subVectors( lightPosition, position ).normalize() );

					if ( amount <= 0 ) continue;

					amount *= light.distance == 0 ? 1 : 1 - Math.min( position.distanceTo( lightPosition ) / light.distance, 1 );

					if ( amount == 0 ) continue;

					amount *= light.intensity;

					color.add( _lightColor.multiplyScalar( amount ) );

				}

			}

		}

		function renderParticle( v1, element, material ) {