SetViewingVolume ( me : mutable ; Left, Right, Bottom, Top, ZNear, ZFar : Real from Standard)
---Level: Public
---Purpose: Sets Z and XY size of the view according to given values
- -- with respecting the initial view depth (eye position)
+ -- with respecting the initial view depth (eye position).
+ -- Width/heigth aspect ratio should be preserved by the caller
+ -- of this method similarly to SetSize() to avoid unexpected
+ -- visual results like non-uniform scaling of objects in the view.
raises BadValue from Viewer;
-- If the ZNear<0, ZFar<0 or ZNear>=Zfar.