What is the best method for determining the central position of a .dae file and adjusting its placement?

As I work with numerous 3D models, I have noticed that many of them are not centered properly. Is there a method to determine the dimensions (length for x, width for z, height for y) of a model and divide it by two in order to accurately position the model?

let loaderDae = new ColladaLoader();
loaderDae.load(`model.dae`, (dae: any) => {
      this.buildingModel = dae.scene;
      // How can I calculate the center point of the model using its length, width, and height?
      this.buildingModel.position.set(x_length/2, y_length/2, z_length/2);
      this.sceneS.add(this.buildingModel);
});

https://i.sstatic.net/m94xB.png

javascriptthree.jscollada

Answer №1

First, you need to create a bounding box and then calculate its size using the getSize() method.

let boundingBox = new THREE.Box3().setFromObject(this.model);
let dimensions = new THREE.Vector3();
dimensions = boundingBox.getSize(dimensions);
this.model.position.set(dimensions.x/2, dimensions.y/2, dimensions.z/2);

It is important to note that this code is designed to be compatible with all supported 3D model file formats.

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