15.5 - Terrain Implementations

Terrain database files are imported using DtTerrainImplementations (terrainImplementation.h).

A DtTerrainImplementation knows how to import terrain geometry data (terrain skin) from an external format and provide intersection capabilities. VR-inTerra has the following terrain implementations:

• Ellipsoid implementation.
• MAK Terrain Format (GDB) implementation.
• VR-Vantage implementation.
• Terrain passthrough layers.

These terrain implementors handle the following terrain types:

• Digital Terrain Elevation Data (DTED)
• Shapefile (SHP)
• MultiGen Paradigm OpenFlight (FLT) and MetaFlight
• Compact Terrain Database (CTDB) versions 4b, 7b, and 7l
• VR-TheWorld Streaming Terrain
• Open Scene Graph IVE
• Extent.

For example, to load an OpenFlight database, do the following:

// Create and initialize a terrain interface
DtTerrainInterface terrainInterface;
terrainInterface.init();

// Load the terrain database
// Openflight files.
if(!terrainInterface.loadTerrain("HL_94.flt.flt"))
{
   DtWarn("Couldn't load terrain database file\n");
   return 1;
}

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