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Skip Navigation LinksHome Page > Programming Samples and Tutorials > C++ Samples > Zoom Sample
Zoom VC Sample

Zoom Sample

Source code for Zoom sample is available in Samples\VC  folder of the installation directory. It is recommended to copy whole VC directory to location outside of the installation folder before loading or compilation. Zoom sample demonstrates  manipulation of .viewing volume using ILook interface. It also demonstrates manipulation of the Eye frame with the help of it IFrame interface 

See also C# .NET Samples, All samples

The application  

The "Center of zoom" group allows entering a point in pixels with respect to which zoom operation will be performed. "Translate Eye Frame" group allows manipulation of the vieving plane

Implementation

All implementation is contained in the main form class named CZoomDlg.

CZoomDlg::OnZoom() handler converts screen coordinates of the zoom center to global 3D coordinates using ILookEx.creenTo3DEx. The point has to be converted to loca to the Eye frame to use the ILook.ZoomEx method. This is accomplished via IFrameEx.ToLocal.for the IFrame of the Eye Frame.