Method ensureGenerate

src/PackedSplats.ts:637–663

(maxSplats: number)

  // Ensures our PackedSplats.target render target has enough space to generate
  // maxSplats total Gsplats, and reallocate if not large enough.
  ensureGenerate(maxSplats: number): boolean {
    if (this.target && (maxSplats ?? 1) <= this.maxSplats) {
      return false;
    }
    if (this.target) {
      this.target.dispose();
    }

    const textureSize = getTextureSize(maxSplats ?? 1);
    const { width, height, depth } = textureSize;
    this.maxSplats = textureSize.maxSplats;

    // The packed Gsplats are stored in a 2D array texture of max size
    // 2048 x 2048 x 2048, one RGBA32UI pixel = 4 uint32 = one Gsplat
    this.target = new THREE.WebGLArrayRenderTarget(width, height, depth, {
      depthBuffer: false,
      stencilBuffer: false,
      generateMipmaps: false,
      magFilter: THREE.NearestFilter,
      minFilter: THREE.NearestFilter,
    });
    this.target.texture.format = THREE.RGBAIntegerFormat;
    this.target.texture.type = THREE.UnsignedIntType;
    this.target.texture.internalFormat = "RGBA32UI";
    this.target.scissorTest = true;
    return true;
  }

  // Given an array of splatCounts (.numSplats for each
  // SplatGenerator/SplatMesh in the scene), compute a