text 来自https://stackoverflow.com/questions/15492857/any-way-to-get-a-bounding-box-from-a-three-js-ob

Posted 2021-05-02

var loader = new THREE.ObjectLoader();
loader.load(imagePath, function(object){

    geometry = object.children[0].children[0].geometry;  // substitute the path to your geometry

    geometry.computeBoundingBox();  // otherwise geometry.boundingBox will be undefined

    var boundingBox = geometry.boundingBox.clone();
    alert('bounding box coordinates: ' + 
        '(' + boundingBox.min.x + ', ' + boundingBox.min.y + ', ' + boundingBox.min.z + '), ' + 
        '(' + boundingBox.max.x + ', ' + boundingBox.max.y + ', ' + boundingBox.max.z + ')' );
}