ThreeJS disable rendering of faces behind the Camera

Question

I am Writing a Panorama Viewer. The Image is Displayed in a Sphere with a variable amount of faces. I want it only to render the faces in the camera direction (

Answer 1

If rolling your own vertices, edges, indices, a triangle with vertices stored in counterclockwise order is said to be front facing by default :

"To activate face culling, GL_CULL_FACE​ must first be enabled with glEnable​. By default, face culling is disabled"

Answer 2

This process is called viewing frustum culling and ThreeJS takes care of this.

ThreeJS also takes care of font and/or backface culling depending on your material settings. Meaning that only the visible side of the faces are rendered.

Here in the documentation you can find the ThreeJS Frustum.

And if the frustumCulled property on THREE.Object3D manages frustum culling and is by default set to true.