Hi,

I explain you my problem.

My image Viewpoint is composed of few objects (MTSInstance).
For example, I would like to click on object and so, the orbit reference change on this object and this object will set to fullscreen into Viewpoint area.

I know how set the orbit reference to an object.

function LeftClic(piece) {
var wm = vmp.GetProperty ('MTSInstance.' + piece, 'WorldMatrix', 'mts_matrix');
vmp.SetProperty ('MTSInstance.InstTmp', 'Matrix', wm, 'mts_matrix');
var loc_ = vmp.GetProperty ('MTSInstance.InstTmp', 'loc_', 'mts_pnt3d');
vmp.SetProperty("MTSCamera", "pivt", loc_,"mts_pnt3d");
}

But I cannot zoom automatically on this object. I know OrbitDist parameter (orbd) but how can calculate the value ?

Thanks in advance

Romain.