playcanvas/build/playcanvas/src/framework/xr/xr-joint.js

PlayCanvas WebGL game engine

import { platform } from '../../core/platform.js';
import { Mat4 } from '../../core/math/mat4.js';
import { Quat } from '../../core/math/quat.js';
import { Vec3 } from '../../core/math/vec3.js';

var tipJointIds = platform.browser && window.XRHand ? [
		'thumb-tip',
		'index-finger-tip',
		'middle-finger-tip',
		'ring-finger-tip',
		'pinky-finger-tip'
] : [];
var tipJointIdsIndex = {};
for(var i = 0; i < tipJointIds.length; i++){
		tipJointIdsIndex[tipJointIds[i]] = true;
}
class XrJoint {
		update(pose) {
				this._dirtyLocal = true;
				this._radius = pose.radius;
				this._localPosition.copy(pose.transform.position);
				this._localRotation.copy(pose.transform.orientation);
		}
		_updateTransforms() {
				if (this._dirtyLocal) {
						this._dirtyLocal = false;
						this._localTransform.setTRS(this._localPosition, this._localRotation, Vec3.ONE);
				}
				var manager = this._hand._manager;
				var parent = manager.camera.parent;
				if (parent) {
						this._worldTransform.mul2(parent.getWorldTransform(), this._localTransform);
				} else {
						this._worldTransform.copy(this._localTransform);
				}
		}
		getPosition() {
				this._updateTransforms();
				this._worldTransform.getTranslation(this._position);
				return this._position;
		}
		getRotation() {
				this._updateTransforms();
				this._rotation.setFromMat4(this._worldTransform);
				return this._rotation;
		}
		get id() {
				return this._id;
		}
		get index() {
				return this._index;
		}
		get hand() {
				return this._hand;
		}
		get finger() {
				return this._finger;
		}
		get wrist() {
				return this._wrist;
		}
		get tip() {
				return this._tip;
		}
		get radius() {
				return this._radius || 0.005;
		}
		constructor(index, id, hand, finger = null){
				this._radius = null;
				this._localTransform = new Mat4();
				this._worldTransform = new Mat4();
				this._localPosition = new Vec3();
				this._localRotation = new Quat();
				this._position = new Vec3();
				this._rotation = new Quat();
				this._dirtyLocal = true;
				this._index = index;
				this._id = id;
				this._hand = hand;
				this._finger = finger;
				this._wrist = id === 'wrist';
				this._tip = this._finger && !!tipJointIdsIndex[id];
		}
}

export { XrJoint };