Is there a way to plot a model from cesium so it maintains its coordinates system?

maintaining cesium coordinate system about three-loader-3dtiles HOT 2 CLOSED

nytimes commented on May 30, 2024

maintaining cesium coordinate system

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Comments (2)

Avnerus commented on May 30, 2024

Hi Eytan,
The loader was initially designed to be independent of geo coordinates so unfortunately there isn't currently an intuitive way to do this. It is, however, in the Roadmap and would appreciate a PR on the matter. Since the backend is loaders.gl, everything should be supported. For example adding a resetGeoTransformation: true/false option would be great. In the mean time, you could try this workaround which seems to work for me with Cesium tilesets:

      // The loaders.gl matrix type
      import { Matrix4 as MathGLMatrix4 } from '@math.gl/core';

      // The result from await Loader3DTiles.load()
      const {model, runtime} = result;

      // Get a reference to the loaders.gl tileset
      const tileset = runtime.getTileset();
    
      // Set the model and camera position to the cartesian center
      model.position.set(...tileset.cartesianCenter);
      camera.position.set(...tileset.cartesianCenter);
      camera.translateY(1000);
  
      // If using orbit controls
      controls.target.set(...tileset.cartesianCenter);
      controls.update();
    
      // Reset the loaders.gl model matrix, otherwise it is set by the loader to inverse the geo-transformation.
      tileset.modelMatrix = new MathGLMatrix4();

Let me know if that worked for you!
/Avner

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Avnerus commented on May 30, 2024

Closing due to inactivity.

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