Precision Issue

[WilliamLiu-1997]

Hi, I am working on a project to show Gaussian Splat 3d tiles on Earth(like CesiumJS, but this project is based on ThreeJS), but because the tiles are on the surface of the earth, so it is farrrrr away from the center. And that causes the precision problem, is there any way I can do to solve this problem?
Screenshot one is using Spark, screenshot two is using renderer I write myself

[dmarcos]

Can you give 2.0.0 preview branch a try?

https://sparkjs.dev/2.0.0-preview/

[WilliamLiu-1997]

Can you give 2.0.0 preview branch a try?

https://sparkjs.dev/2.0.0-preview/

I am using 2.0.0 preview already

The only solution for now is to make Camera Relative Rendering

const cameraWorldPos = camera.position.clone();

scene.position.sub(cameraWorldPos);
camera.position.set(0, 0, 0);
scene.updateMatrixWorld(true);
camera.updateMatrixWorld(true);

// Compute SparkRenderer's local matrix so that its matrixWorld equals
// the camera's matrixWorld.  When the parent (scene) is shifted for
// camera-relative rendering, we need to compensate for the parent's
// non-identity world matrix.
const sparkParent = this.#sparkRenderer.parent;
if (sparkParent) {
  _sparkParentWorldInverse.copy(sparkParent.matrixWorld).invert();
  this.#sparkRenderer.matrix.multiplyMatrices(
    _sparkParentWorldInverse,
    this.#camera.matrixWorld,
  );
} else {
  this.#sparkRenderer.matrix.copy(this.#camera.matrixWorld);
}
this.#sparkRenderer.updateMatrixWorld(true);

// Manually trigger SparkRenderer update so that the display
// accumulator uses the CURRENT frame's shifted coordinates.
// With autoUpdate the display lags one frame behind, which causes
// visible jitter during camera rotation because each frame's
// camera-relative shift is different.
this.#sparkRenderer.update({
  scene: this.#scene,
  camera: this.#camera,
});


render()

camera.position.copy(cameraWorldPos);
scene.position.add(cameraWorldPos);
camera.updateMatrixWorld(true);
scene.updateMatrixWorld(true);

I think spark could use this type of camera-relative rendering, this could help solve the issue when user want to put the Gaussian Splats model on the surface of the earth