playcanvas/build/playcanvas.prf/src/framework/xr/xr-tracked-image.js

PlayCanvas WebGL game engine

import { EventHandler } from '../../core/event-handler.js';
import { Vec3 } from '../../core/math/vec3.js';
import { Quat } from '../../core/math/quat.js';

class XrTrackedImage extends EventHandler {
		static{
				this.EVENT_TRACKED = 'tracked';
		}
		static{
				this.EVENT_UNTRACKED = 'untracked';
		}
		constructor(image, width){
				super(), this._bitmap = null, this._measuredWidth = 0, this._trackable = false, this._tracking = false, this._emulated = false, this._pose = null, this._position = new Vec3(), this._rotation = new Quat();
				this._image = image;
				this._width = width;
		}
		get image() {
				return this._image;
		}
		set width(value) {
				this._width = value;
		}
		get width() {
				return this._width;
		}
		get trackable() {
				return this._trackable;
		}
		get tracking() {
				return this._tracking;
		}
		get emulated() {
				return this._emulated;
		}
		prepare() {
				if (this._bitmap) {
						return {
								image: this._bitmap,
								widthInMeters: this._width
						};
				}
				return createImageBitmap(this._image).then((bitmap)=>{
						this._bitmap = bitmap;
						return {
								image: this._bitmap,
								widthInMeters: this._width
						};
				});
		}
		destroy() {
				this._image = null;
				this._pose = null;
				if (this._bitmap) {
						this._bitmap.close();
						this._bitmap = null;
				}
		}
		getPosition() {
				if (this._pose) this._position.copy(this._pose.transform.position);
				return this._position;
		}
		getRotation() {
				if (this._pose) this._rotation.copy(this._pose.transform.orientation);
				return this._rotation;
		}
}

export { XrTrackedImage };