vtDynTerrainGeom Class Reference
[Dynamic Terrain (CLOD)]

Inheritance diagram for vtDynTerrainGeom:

[legend]

List of all members.

Public Member Functions
DTErr	BasicInit (const vtElevationGrid *pGrid)
void	SetOptions (bool bUseTriStrips, int iBlockArrayDim, int iTextureSize)
virtual void	SetPolygonTarget (int iPolygonCount)
int	GetPolygonTarget ()
int	GetNumDrawnTriangles ()

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Detailed Description

This class provides a framework for implementing any kind of dynamic geometry for a heightfield terrain grid. It is the parent class which contains common fuctionality used by each of the terrain CLOD implementations.

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Member Function Documentation

DTErr vtDynTerrainGeom::BasicInit

(

const vtElevationGrid *

pGrid

)

Sets up the vtDynTerrainGeom object. The units, extents, height range, grid dimensions and other properties are copied from the supplied elevation grid.

This is generally called from the Init() method of a subclass.

int vtDynTerrainGeom::GetNumDrawnTriangles

(

)

Return the number of triangles that were rendered by this dynamic terrain last frame.

int vtDynTerrainGeom::GetPolygonTarget

(

)

Get the polygon target, which is the number of polygons (generally triangles) which the CLOD algorithm will try to maintain.

void vtDynTerrainGeom::SetOptions	(	bool	bUseTriStrips,
		int	iTPatchDim,
		int	iTPatchSize
	)

Set the options for this vtDynTerrainGeom:

Parameters:

	bUseTriStrips	True to enable triangle strips; this is only observed by SMTerrain.
	iTPatchDim	The number of texture patches, e.g. 4 indicated a 4x4 grid of patches.
	iTPatchSize	The size of each texture, e.g. 1024.

void vtDynTerrainGeom::SetPolygonTarget

(

int

iCount

)

[virtual]

Set the polygon target, which is the number of polygons (generally triangles) which the CLOD algorithm will try to maintain.

Reimplemented in SRTerrain.