Can a single camera be utilized for capturing two different scenes?

Hey there! I'm currently working on rendering two different scenes with a camera that moves in sync between the two.

Here's what I'm trying to accomplish: I need to display two separate point clouds in two distinct scenes, but I want the cameras in each scene to move simultaneously and in a similar way.

I'm curious if anyone knows an efficient way to achieve this. I initially attempted using two renderers, two scenes, and one camera, but encountered an error after adding spheres to each scene:

"three.js:21528 Uncaught TypeError: Cannot read property 'length' of undefined"

Do I have to resort to having two cameras, or is there another method I could try? Additionally, is it possible to use the same object and add it to both scenes without removing it from the first one?

Appreciate any guidance you can offer! 😄

Answer №1

It appears that in the world of 3D rendering, a camera or mesh object can only be linked to one scene at a time due to the nature of the child:parent relationship formed when assigning them. This means a child can have only one parent at any given moment.

In theory, you could potentially transfer a single camera between scenes or move multiple mesh objects back and forth. However, it may not be ideal if you're aiming for a smooth and high frame rate, especially with numerous elements moving across scenes.

A more reliable approach would involve creating individual cameras for each scene and ensuring they move synchronously by matching their position and rotation values before each frame render. The same goes for mesh objects meant to appear in multiple scenes - generate separate copies and synchronize any changes to their properties like position and rotation.

Answer №2

It is not necessary to include a camera in every scene, as one camera can be utilized for rendering multiple scenes. The exception to this rule is when a camera has a child element, like a light source.

A single renderer has the ability to render diverse scenes effectively.

An individual object, such as a mesh or point cloud, can only have one parent and thus can only be added to one scene at any given time.

Version r.75 of three.js

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