What is the best way to clear the textureCache in A-Frame's latest release?

Question

What is the best way to clear the textureCache in A-Frame's latest release?

Currently working on a project involving multi-camera streaming, I've noticed a continuous increase in memory usage after switching between cameras. I've managed to clean up on the hls.js side of things, but I haven't come across any methods to do the same in a-frame. I'm currently using version 1.2.0.

After searching, I found some older posts suggesting to use

document.querySelector('a-scene').systems.material.textureCache

and execute .dispose()

It seems like this method worked on version 0.3.0, but not in the latest versions. Is there a new way to clean up textures or does this now happen automatically?

javascript three.js aframe hls.js

Answer 1

Answer №1

From my understanding, the textureCache is responsible for managing loaded textures (image, video) as promises.

Although there is a clearTextureCache function, it only clears the object without disposing of the loaded textures.

One approach could be to iterate through the textureCache, retrieve the THREE.Texture objects, and call .dispose() on them. Following this, you can use clearTextureCache() to tidy up. The code snippet below demonstrates how to print cached textures to the console upon window click:

<script src="https://aframe.io/releases/1.2.0/aframe.min.js"></script>
<script>
  AFRAME.registerComponent("foo", {
    init: function() {
      window.addEventListener("click", e => {
        const textureCache = this.el.systems.material.textureCache;
        console.log("Textures in the cache:")
        for (let key in textureCache) {
          textureCache[key].then(val => console.log(val))
        }
      })
    }
  })
</script>
<a-scene foo>
  <a-image position="-1 1.6 -2" src="https://i.imgur.com/wjobVTN.jpeg"></a-image>
  <a-image position="1 1.6 -2" src="https://i.imgur.com/AD3MbBi.jpg"></a-image>
  <a-sky color="#ECECEC"></a-sky>
</a-scene>

Answer 2

From my understanding, the textureCache is responsible for managing loaded textures (image, video) as promises.

Although there is a clearTextureCache function, it only clears the object without disposing of the loaded textures.

One approach could be to iterate through the textureCache, retrieve the THREE.Texture objects, and call .dispose() on them. Following this, you can use clearTextureCache() to tidy up. The code snippet below demonstrates how to print cached textures to the console upon window click:

<script src="https://aframe.io/releases/1.2.0/aframe.min.js"></script>
<script>
  AFRAME.registerComponent("foo", {
    init: function() {
      window.addEventListener("click", e => {
        const textureCache = this.el.systems.material.textureCache;
        console.log("Textures in the cache:")
        for (let key in textureCache) {
          textureCache[key].then(val => console.log(val))
        }
      })
    }
  })
</script>
<a-scene foo>
  <a-image position="-1 1.6 -2" src="https://i.imgur.com/wjobVTN.jpeg"></a-image>
  <a-image position="1 1.6 -2" src="https://i.imgur.com/AD3MbBi.jpg"></a-image>
  <a-sky color="#ECECEC"></a-sky>
</a-scene>

What is the best way to clear the textureCache in A-Frame's latest release?

Answer №1

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