aframe
Version:
A web framework for building virtual reality experiences.
48 lines (36 loc) • 1.43 kB
JavaScript
import * as THREE from 'three';
import { registerComponent } from '../../core/component.js';
var originalPosition = new THREE.Vector3();
var originalRotation = new THREE.Vector3();
/**
* Wrap el.object3D within an outer group. Apply pivot to el.object3D as position.
*/
registerComponent('pivot', {
dependencies: ['position'],
schema: {type: 'vec3'},
init: function () {
var data = this.data;
var el = this.el;
var originalParent = el.object3D.parent;
var originalGroup = el.object3D;
var outerGroup = new THREE.Group();
originalPosition.copy(originalGroup.position);
originalRotation.copy(originalGroup.rotation);
// Detach current group from parent.
originalParent.remove(originalGroup);
outerGroup.add(originalGroup);
// Set new group as the outer group.
originalParent.add(outerGroup);
// Set outer group as new object3D.
el.object3D = outerGroup;
// Apply pivot to original group.
originalGroup.position.set(-1 * data.x, -1 * data.y, -1 * data.z);
// Offset the pivot so that world position not affected.
// And restore position onto outer group.
outerGroup.position.set(data.x + originalPosition.x, data.y + originalPosition.y,
data.z + originalPosition.z);
// Transfer rotation to outer group.
outerGroup.rotation.copy(originalGroup.rotation);
originalGroup.rotation.set(0, 0, 0);
}
});