HRESULT InitTerrainRender()
{
HRESULT hr = S_OK;
float fFinestLevelTriangError = g_fElevationSamplingInterval / 4.f;
g_pTriangDataSource.reset( new CTriangDataSource );
CHAR str[MAX_PATH];
WideCharToMultiByte( CP_ACP, 0, g_strEncodedRQTTriangFile, -1, str, MAX_PATH, NULL, FALSE );
//hr = DXUTFindDXSDKMediaFileCch( str, MAX_PATH, g_strEncodedRQTTriangFile );
bool bCreateAdaptiveTriang = g_bForceRecreateTriang;
if( !bCreateAdaptiveTriang )
{
if( SUCCEEDED(hr) )
{
// Try load triangulation data file
hr = g_pTriangDataSource->LoadFromFile(str);
if( SUCCEEDED(hr) )
{
if( g_pTriangDataSource->GetNumLevelsInHierarchy() != g_pElevDataSource->GetNumLevelsInHierarchy() ||
g_pTriangDataSource->GetPatchSize() != g_pElevDataSource->GetPatchSize() )
bCreateAdaptiveTriang = true; // Incorrect parameters
}
else
bCreateAdaptiveTriang = true; // Loading failed
}
else
bCreateAdaptiveTriang = true; // File not found
}
// Init empty adaptive triangulation data source if file was not found or other problem occured
if( bCreateAdaptiveTriang )
{
g_pTriangDataSource->Init( g_pElevDataSource->GetNumLevelsInHierarchy(), g_pElevDataSource->GetPatchSize(), fFinestLevelTriangError );
}
g_TerrainDX11Render.Init(g_TerrainRenderParams, g_DX11PatchRenderParams, g_pElevDataSource.get(), g_pTriangDataSource.get() );
// Create adaptive triangulation if file was not found or other problem occured
if( bCreateAdaptiveTriang )
{
g_TerrainDX11Render.ConstructPatchAdaptiveTriangulations();
hr = g_pTriangDataSource->SaveToFile(str);
}
SPatchBoundingBox TerrainAABB;
g_TerrainDX11Render.GetTerrainBoundingBox(TerrainAABB);
return S_OK;
}
// Loads the selected scene
HRESULT LoadScene()
{
memset( g_strRawDEMDataFile, 0, sizeof(g_strRawDEMDataFile) );
memset( g_strEncodedRQTTriangFile, 0, sizeof(g_strEncodedRQTTriangFile) );
// Get selected config file
int iSelectedConfigFile = 0;
// Parse the config file
if( FAILED(ParseConfigurationFile( g_ConfigFiles[iSelectedConfigFile].c_str() )) )
{
//LOG_ERROR(_T("Failed to load config file %s"), g_ConfigFiles[iSelectedConfigFile].c_str() );
return E_FAIL;
}
g_TerrainRenderParams.m_fElevationSamplingInterval = g_fElevationSamplingInterval;
// Create data source
try
{
g_pElevDataSource.reset( new CElevationDataSource(g_strRawDEMDataFile, g_iPatchSize) );
}
catch(const std::exception &)
{
LOG_ERROR(_T("Failed to create elevation data source"));
return E_FAIL;
}
g_TerrainRenderParams.m_iNumLevelsInPatchHierarchy = g_pElevDataSource->GetNumLevelsInHierarchy();
g_TerrainRenderParams.m_fGlobalMinElevation = g_pElevDataSource->GetGlobalMinElevation() * g_fElevationScale ;
g_TerrainRenderParams.m_fGlobalMaxElevation = g_pElevDataSource->GetGlobalMaxElevation() * g_fElevationScale ;
g_TerrainRenderParams.m_iPatchSize = g_pElevDataSource->GetPatchSize();
g_TerrainRenderParams.m_fElevationScale = g_fElevationScale;
return S_OK;
}