(function() {
    var zoneWebEntities = [];
    var DEFAULT_DPI = 30;
    var DPI = /*dpi ||*/ DEFAULT_DPI;
    this.enterEntity = function(id) {
        Entities.getChildrenIDs(id).forEach(function(entityID) {
            var properties = Entities.getEntityProperties(entityID);
            zoneWebEntities.push(Overlays.addOverlay("web3d", {
                url: JSON.parse(properties.userData).url,
                position: properties.position,
                rotation: properties.rotation,
                resolution: { x: 480, y: 640 },
                dpi: DPI,
                color: { red: 255, green: 255, blue: 255 },
                alpha: 1.0,
                parentID: entityID,
                parentJointIndex: -1
            }))
        });
    };

    this.leaveEntity = function(id) {
        zoneWebEntities.forEach(function(overlay) {
            Overlays.deleteOverlay(overlay);
        });
    };
});