function onMouseMove()

in viewer/legacy/js/OrbitControls.js [316:386]
39 lines of code
12 McCabe index (conditional complexity)

	function onMouseMove( event ) {

		if ( scope.enabled === false ) return;

		event.preventDefault();

		var element = scope.domElement === document ? scope.domElement.body : scope.domElement;

		if ( state === STATE.ROTATE ) {
			if ( scope.noRotate === true ) return;

			rotateEnd.set( event.clientX, event.clientY );
			rotateDelta.subVectors( rotateEnd, rotateStart );

			// rotating across whole screen goes 360 degrees around
			scope.rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientWidth * scope.rotateSpeed );

			// rotating up and down along whole screen attempts to go 360, but limited to 180
			scope.rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight * scope.rotateSpeed );

			rotateStart.copy( rotateEnd );

		} else if ( state === STATE.LOOK_AROUND ) {
			if (scope.noRotate === true) return;

			lookAroundEnd.set(event.clientX, event.clientY);
			lookAroundDelta.subVectors(lookAroundEnd, lookAroundStart);

			// rotating across whole screen goes 360 degrees around
			scope.lookAroundLeft(2 * Math.PI * lookAroundDelta.x / element.clientWidth * scope.lookAroundSpeed);

			// rotating up and down along whole screen attempts to go 360, but limited to 180
			scope.lookAroundUp(2 * Math.PI * lookAroundDelta.y / element.clientWidth * scope.lookAroundSpeed);

			lookAroundStart.copy(lookAroundEnd);

		} else if ( state === STATE.DOLLY ) {

			if ( scope.noZoom === true ) return;

			dollyEnd.set( event.clientX, event.clientY );
			dollyDelta.subVectors( dollyEnd, dollyStart );

			if ( dollyDelta.y > 0 ) {

				scope.dollyIn(getZoomScale());

			} else {

				scope.dollyOut(getZoomScale());

			}

			dollyStart.copy( dollyEnd );

		} else if ( state === STATE.PAN ) {

			if ( scope.noPan === true ) return;

			panEnd.set( event.clientX, event.clientY );
			panDelta.subVectors( panEnd, panStart );

			scope.pan( panDelta.x, panDelta.y );

			panStart.copy( panEnd );

		}

		scope.update();

	}