resize 3dimage widget / Javascript

Is it possible to change the width and height  of 3DImage with the javascript code?

I tried in every way but in the end it does not change anything.

i used this code.

$scope.add=function() {

$scope.setWidgetProp("3DImage-1", "width", parseInt($scope.getWidgetProp("3DImage-1", "width")) + 1);

}

or 

$scope.add=function() {

$scope.view.wdg["3DImage-1"].width += 1
}

but not working.

Thnx

Giuseppe