SpotLight Helper won't turn!

Questions
1

Hi.
Installed SpotLight on scene. Gave a target for the light. Then I installed SpotLightHelper and there was a problem: SpotLightHelper looking in the wrong direction!

 var targetObject = new THREE.Object3D();
            targetObject.position.set(40,0,6);
            scene.add(targetObject);

    var spotLight = new THREE.SpotLight(0xffffff, 1, 50, THREE.Math.degToRad(30), 0.1, 2);
            spotLight.power = 2000;
            spotLight.position.set(20,6,3);
            spotLight.target = targetObject;
            scene.add(spotLight.target);

    var spotLightHelper = new THREE.SpotLightHelper(spotLight);
            scene.add(spotLightHelper);

            scene.add(spotLight);

helperspot
helperspot934×771 75.5 KB

2

Are you updating the helper in your animation loop? Check out how this is done in the following example:

https://threejs.org/examples/webgl_lights_spotlights