我正在使用以下代码对加载使用ObjectLoader压缩的msgpack对象进行缩放和居中处理,但无法正常工作。我认为我的对象有一个旋转,因此导致一些奇怪的行为。对于某些对象,它成功地居中,但对于其他对象,居中偏移且缩放也不正确。
在这个片段中,result是从ObjectLoader获得的场景。我的想法是对象没有很好的形成,但我不确定。我希望图像上的桌子或任何其他用户输入的网格位于网格的顶部,并以最大大小为1个单位进行居中和缩放。
每个正方形尺寸为0.25,轴位于0,0,0 http://i.stack.imgur.com/fkKYC.png
// result is a threejs scene
var geometry = result.children[0].geometry;
var mesh = result.children[0];
geometry.computeBoundingBox();
var middle = new THREE.Vector3();
middle.x = ( geometry.boundingBox.max.x + geometry.boundingBox.min.x ) / 2;
middle.y = -geometry.boundingBox.min.y;
middle.z = ( geometry.boundingBox.max.z + geometry.boundingBox.min.z ) / 2;
middle.negate();
mesh.position.copy(middle);
// scales the mesh up to maxsize
var maxSize = 1;
// gets the biggest axis
var maxVal = geometry.boundingBox.max.x - geometry.boundingBox.min.x;
if (maxVal < geometry.boundingBox.max.y - geometry.boundingBox.min.y) {
maxVal = geometry.boundingBox.max.y - geometry.boundingBox.min.y;
}
if (maxVal < geometry.boundingBox.max.z - geometry.boundingBox.min.z) {
maxVal = geometry.boundingBox.max.z - geometry.boundingBox.min.z;
// scales the current size proportional to the maxval, times maxsize
mesh.scale.divideScalar(maxVal * maxSize);
self.scene.add(result);