topic Sight Observer in Archicad C++ API

Sight Observer

Anonymous — Tue, 14 Sep 2021 11:47:02 GMT

Hi, guys.

I am trying to make the add-on do something when the sight change. I look into the SDK and find class ISightObserver may relate with my requirement. Could you please help me use it? Is there any sample?

Thanks in advance.

Re: Sight Observer

Kristian Bursell — Tue, 15 Sep 2020 11:35:00 GMT

is Shawn Hopkins (BIM Bakery) on this forum? They had a sight observer tool for stadiums, hence he may be able to help you.

Re: Sight Observer

Anonymous — Thu, 17 Sep 2020 10:03:13 GMT

I have solved it. Here is my code (maybe someone will find it helpful):


class MySightObserver: public Modeler::ISightObserver {

public:
	Modeler::Camera cam;
	void CameraChanged(const Modeler::Camera&);

};
MySightObserver mso;

MySight::MySight(Modeler::Sight *sig){
	mysight = sig;
	myobserver = &mso;
	((MySightObserver*)myobserver)->cam = sig->GetCamera();
	sig->Attach(*myobserver);
}

void MySightObserver::CameraChanged(const Modeler::Camera& newCamera) {
	if (!newCamera.IsNear(cam)) {
              /*Your code here*/
	}
	return;
}

PS: You need to fetch the Modeler::Sight (see my another post) and create an instance of MySightObserver.