Method SetLOD

trinity/Tr2SkinnedObjectLOD.cpp:197–292

}

Tr2SkinnedModel* Tr2SkinnedObjectLod::SetLOD( const TriFrustum* frustum, float estimatedPixelDiameter )
{
	CCP_STATS_ZONE( __FUNCTION__ );

	if( !m_allowLodSelection )
	{
		return NULL;
	}

	IBlueObjectProxyPtr proxy[3] = { m_highDetailProxy, m_mediumDetailProxy, m_lowDetailProxy };

	// are any of the proxies in the middle of building something?  In that case, wait that out so
	// we don't bombard the resource system.
	int stickyLod = -1;
	for( unsigned i = 0; i != 3; ++i )
	{
		if( proxy[i] && proxy[i]->IsTemporary() )
		{
			CCP_STATS_INC( countUnderConstructionLOD );
			stickyLod = m_currentLod;
		}
	}

	const int high = 0;
	const int medium = 1;
	const int low = 2;

	int choice[3] = { high, medium, low }; // order of preferred LOD. set up for high lod by default

	if( stickyLod == 2 ||
		// small enough for low lod?
		( m_currentLod >= 2 && estimatedPixelDiameter <= g_skinnedLowDetailThreshold + g_skinnedMediumLowMargin ) || // before going up, add some margin
		( m_currentLod < 2 && estimatedPixelDiameter <= g_skinnedLowDetailThreshold - g_skinnedMediumLowMargin ) )
	{
		choice[0] = low;
		choice[1] = medium;
		choice[2] = high;
	}
	else if( stickyLod == 1 ||
			 // medium lod?
			 ( m_currentLod >= 1 && estimatedPixelDiameter <= g_skinnedMediumDetailThreshold + g_skinnedHighMediumMargin ) || // before going up, add some margin
			 ( m_currentLod < 1 && estimatedPixelDiameter <= g_skinnedMediumDetailThreshold - g_skinnedHighMediumMargin ) )
	{
		choice[0] = medium;
		choice[1] = low;
		choice[2] = high;
	}

	// Go through our choices of LOD in order, until we find something that's not null.
	// If we got something, but it's still loading or a temp stub, we may still want to switch
	// to something better, _if_ the new choice is already resident (so we don't trigger loads
	// on everything at the same time).

	int selectedLod = -1;
	Tr2SkinnedModel* model = NULL;
	bool modelIsTemporary = true;

	for( unsigned i = 0; i != 3; ++i )