[英]Get size of Object3D in Three.js
I have this 3D object in my scene:我的场景中有这个 3D 对象:
var icon = new THREE.Object3D()
var iconTexture = THREE.ImageUtils.loadTexture('images/icon.png'),
iconMaterial = new THREE.SpriteMaterial({
map: iconTexture,
color: 0xffffff,
opacity: 1
});
var iconSprite = new THREE.Sprite(iconMaterial);
iconSprite.scale.set(14, 14, 1.0);
iconSprite.position.set(Math.random() - 0.5, Math.random() - 0.5, Math.random() - 0.75);
icon.position.setLength(0);
icon.add(iconSprite);
icon.position.y = 15;
icon.position.z = 20;
scene.add(icon);
scene.updateMatrixWorld(true);
I manged to get the position of this object:我设法得到这个对象的位置:
var position = new THREE.Vector3();
position.getPositionFromMatrix( icon.matrixWorld );
console.log(position.x + ',' + position.y + ',' + position.z);
But I can't get the size of that object.但我无法获得该对象的大小。 I tried something like that:
我尝试过这样的事情:
console.log("sizes: "+icon.min+", "+icon.max);
But got this output: sizes: undefined, undefined
.但是得到了这个输出:
sizes: undefined, undefined
。
Is there any way to get the size of that object?有什么方法可以获取该对象的大小?
You could possibly create bounding box from your object:您可以从您的对象创建边界框:
var bbox = new THREE.Box3().setFromObject(icon);
If you have bounding box you can get it's min and max.如果你有边界框,你可以得到它的最小值和最大值。
Max.z - Min.z
-> height Max.z - Min.z
-> 高度
Max.x - Min.x
-> width Max.x - Min.x
-> 宽度
Max.y - Min.y
-> depth Max.y - Min.y
-> 深度
THREE.Sprite()
has a geometry
property so you can do: THREE.Sprite()
具有geometry
属性,因此您可以执行以下操作:
if( iconSprite.geometry.boundingBox === undefined )
iconSprite.geometry.computeBoundingBox ();
and you can get all the info you need from the .boundingBox
property from its own properties .boundingBox.min
and .boundingBox.max
.并且您可以从
.boundingBox
属性从其自己的属性.boundingBox.min
和.boundingBox.max
获取您需要的所有信息。
const boundingBox = new THREE.Box3().setFromObject(object) const xSize = boundingBox.max.x - boundingBox.min.x const ySize = boundingBox.max.y - boundingBox.min.y const zSize = boundingBox.max.z - boundingBox.min.z const maxSize = Math.max(xSize, ySize, zSize)
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