vtPagedStructureLodGrid Class Reference

Inheritance diagram for vtPagedStructureLodGrid:

[legend]List of all members.

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Detailed Description

vtPagedStructureLodGrid provides a more complex implementation of vtLodGrid.

Like vtSimpleLodGrid, it consists of a 2D grid of LOD nodes, each covering a rectangular cell, which causes that cell's children to only be shown when within a given distance. Additionally, the cells can contain structures (vtStructure) which are not constructed until the cell is visible.

Public Member Functions
void	Release ()
void	RefreshPaging (vtStructureArray3d *pArray)
vtPagedStructureLOD *	FindGroup (vtStructure *str)

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Member Function Documentation

vtPagedStructureLOD * vtPagedStructureLodGrid::FindGroup (  vtStructure *  str  )

For a given vtStructure, find the lod group parent for it, using the structure's earth extents.

void vtPagedStructureLodGrid::RefreshPaging (  vtStructureArray3d *  pArray  )

In case the paging grid did not load some structure before (because the structures were hidden), tell it to check again. You should call this when a structure layer becomes enabled (un-hidden).

void vtPagedStructureLodGrid::Release (   )  [virtual]

Releases a node. Use this method instead of C++'s delete operator when you are done with a node. Internally, the node is reference counted so it is not deleted until all references to it are removed. Implements vtLodGrid.

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