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vgl-box-helper.js
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vgl-box-helper.js
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import { BoxHelper } from 'three';
import VglObject3d from '../core/vgl-object3d';
import { name, color } from '../types';
import { validateName } from '../validators';
/**
* A helper component to show the world-axis-aligned bounding box around its parent,
* corresponding [THREE.BoxHelper](https://threejs.org/docs/index.html#api/helpers/BoxHelper).
*
* Properties of [VglObject3d](../core/vgl-object3d) are also available as mixin.
*/
export default {
mixins: [VglObject3d],
props: {
/** Size of the lines representing the axes. */
color: { type: color, default: '#ff0' },
/** Name of the object to show the world-axis-aligned boundingbox. */
object: { type: name, required: true, validator: validateName },
},
computed: {
/** The THREE.BoxHelper instance. */
inst() { return new BoxHelper(undefined, this.color); },
},
methods: {
/** Set the geometry of the helper box from given object. */
setFromObject(obj) { this.inst.setFromObject(obj); },
},
beforeDestroy() {
if (this.object !== undefined) {
this.vglNamespace.object3ds.unlisten(this.object, this.setFromObject);
}
},
watch: {
inst() {
if (this.object !== undefined) {
this.setFromObject(this.vglNamespace.object3ds.get(this.object));
}
},
object: {
handler(newName, oldName) {
const { vglNamespace: { object3ds }, setFromObject } = this;
if (oldName !== undefined) object3ds.unlisten(oldName, setFromObject);
if (newName !== undefined) {
object3ds.listen(newName, setFromObject);
setFromObject(this.vglNamespace.object3ds.get(newName));
}
},
immediate: true,
},
},
};