Implementation of SpotLight rotation using three.js

Question

Implementation of SpotLight rotation using three.js

Currently, I am attempting to rotate a spotlight using the following code:

var light   = new THREE.SpotLight( color, intensity, distance );
light.position.set( 0, 100, 0 );
light.rotation.set( 0, Math.PI, 0 );
light.shadowCameraFar = 50;
light.shadowCameraNear      = 0.01;     
light.castShadow        = true;
light.shadowDarkness        = 0.5;
light.shadowCameraVisible   = true;
light.shadowCameraFar = 800;
light.shadowCameraFov = 15;
scene.add( light );

I am encountering an issue where the spotlight does not change its rotation regardless of what value I assign to it. I'm trying to figure out where I may be going wrong.

javascript 3d three.js

Answer 1

Answer №1

light.target is used to set the orientation of the spotlight's shadow camera. For instance, if you have an object named myObject in your scene, you can assign it to light.target like this:

light.target = myObject;

It's important to note that light.target should be an instance of Object3D, not just a position vector.

This information pertains to Three.js version r.49

Answer 2

light.target is used to set the orientation of the spotlight's shadow camera. For instance, if you have an object named myObject in your scene, you can assign it to light.target like this:

light.target = myObject;

It's important to note that light.target should be an instance of Object3D, not just a position vector.

This information pertains to Three.js version r.49

Answer 3

Answer №2

To position the light target, you can either directly assign its position:

myLight.target.position = new THREE.Object3D( 50, 60, 70 );

Alternatively, you can define the properties of the light target object:

myLight.target.position.x = 50;
myLight.target.position.y = 60;
myLight.target.position.z = 70;

Answer 4

To position the light target, you can either directly assign its position:

myLight.target.position = new THREE.Object3D( 50, 60, 70 );

Alternatively, you can define the properties of the light target object:

myLight.target.position.x = 50;
myLight.target.position.y = 60;
myLight.target.position.z = 70;

Answer 5

Answer №3

Give this a shot

Insert an empty Object3D inside SpotLight as a child

const targetObject = new THREE.Object3D()
scene.add(targetObject)
spotLight.add(targetObject)
targetObject.position.set(0,-1,0)
spotLight.target = targetObject

Now, you can manipulate the rotation of spotLight

Answer 6

Give this a shot

Insert an empty Object3D inside SpotLight as a child

const targetObject = new THREE.Object3D()
scene.add(targetObject)
spotLight.add(targetObject)
targetObject.position.set(0,-1,0)
spotLight.target = targetObject

Now, you can manipulate the rotation of spotLight

Implementation of SpotLight rotation using three.js

Answer №1

Answer №2

Answer №3

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