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Data Structures
Vrml_LOD.hxx File Reference
#include <Standard.hxx>
#include <Standard_DefineHandle.hxx>
#include <Handle_Vrml_LOD.hxx>
#include <Handle_TColStd_HArray1OfReal.hxx>
#include <gp_Vec.hxx>
#include <Standard_Boolean.hxx>
#include <MMgt_TShared.hxx>
#include <Standard_OStream.hxx>

Data Structures

class  Vrml_LOD
 defines a LOD (level of detailization) node of VRML specifying properties
of geometry and its appearance.
This group node is used to allow applications to switch between
various representations of objects automatically. The children of this
node typically represent the same object or objects at the varying
of Levels Of Detail (LOD), from highest detail to lowest.

The specified center point of the LOD is transformed by current
transformation into world space, and yhe distancefrom the transformed
center to the world-space eye point is calculated.
If thedistance is less than the first value in the ranges array,
than the first child of the LOD group is drawn. If between
the first and second values in the range array, the second child
is drawn, etc.
If there are N values in the range array, the LOD group should
have N+1 children.
Specifying too few children will result in the last child being
used repeatedly for the lowest lewels of detail; if too many children
are specified, the extra children w ll be ignored.
Each value in the ranges array should be greater than the previous
value, otherwise results are undefined.
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