Transform the file format from .casa-model to .obj

Looking for a way to convert a file with the extension .casa-model to .obj format. Is there any solution available? Find the model here.

Answer №1

This particular .casa-model appears to follow a unique JSON format that lacks documentation. Nonetheless, it contains all the essential data (vertices, normals, uv-coordinates, and indices) necessary for rendering, just like a .obj or any other file format.

Here's a suggested approach:

  1. Begin by loading and parsing the JSON file.
  2. Next, iterate through casa_model.mesh.

    1. Create a new THREE.BufferGeometry.
    2. Add attributes like position, normal, and uv, filling them with corresponding JSON data (casa_model.mesh[i].vertices, casa_model.mesh[i].normals, casa_model.mesh[i].uvs). This can be done as follows:

      buffergeometry.addAttribute('position', 
          new THREE.BufferAttribute(new Float32Array(casa_model.mesh[i].vertices), 3));
      
    3. Create an index attribute and populate it with data from JSON (

      casa_model.mesh[i].triangle_indices
      ).

  3. At this stage, you should be able to render the object using three.js. If you still require the .obj file, utilize THREE.OBJExporter to convert it into the .obj format.

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