C++'s viewcontrol doesn't work at ver0.8

[kazu0622]

I'm using ver0.8 to build C++ app because my VisualStudio is 2015.
And I tried to use viewControl to change view angle by changing camera extrinsic params.
And it seems it fail to change extrinsics. I'd like to know how to solve this probrem.

My code overview is as follows:
visualization::Visualizer vis;
geometry::LineSet lineset;
Eigen::Vector3d drawcamerapoint[5] = {
Eigen::Vector3d(0, 0, 0),//0
Eigen::Vector3d(-0.2, -0.1, 0.1),//1
Eigen::Vector3d(0.2, -0.1, 0.1),//2
Eigen::Vector3d(0.2, 0.1, 0.1),//3
Eigen::Vector3d(-0.2, 0.1, 0.1)//4
};
Eigen::Vector2i drawcameraline[8] = {
Eigen::Vector2i(0, 1),
Eigen::Vector2i(0, 2)
};
Eigen::Matrix4d view_extrinsic = Eigen::Matrix4d::Identity();
std::shared_ptrgeometry::LineSet lineset_ptr(
new geometry::LineSet);
*lineset_ptr = lineset;
vis.AddGeometry(lineset_ptr);
visualization::ViewControl viewctrl = vis.GetViewControl();
camera::PinholeCameraParameters camparam;
viewctrl.ConvertToPinholeCameraParameters(camparam);
camparam.extrinsic_ = Eigen::Matrix4d_u::Identity();
while(1){
vis.UpdateGeometry();
vis.PollEvents();
vis.UpdateRender();
}

[yxlao]

duplicate of #2843