Method GetPerObjectData

trinity/Eve/SpaceObject/Children/EveChildCloud.cpp:362–418

}

Tr2PerObjectData* EveChildCloud::GetPerObjectData( ITriRenderBatchAccumulator* accumulator )
{
	EveChildCloudPerObjectData* data = accumulator->Allocate<EveChildCloudPerObjectData>();

	if( !data )
	{
		return NULL;
	}

	data->m_data.m_world = Transpose( m_worldTransform );

	Matrix worldView = m_worldTransform * Tr2Renderer::GetViewTransform();
	data->m_data.m_worldView = Transpose( worldView );

	Matrix worldViewProjection = m_worldTransform * Tr2Renderer::GetViewTransform() * Tr2Renderer::GetProjectionTransform();

	Matrix worldViewTransposed = Transpose( worldView );
	Vector4 nearPlane( 0.f, 0.f, -1.f, -Tr2Renderer::GetFrontClip() );
	data->m_data.m_nearPlaneLocal = Transform( nearPlane, worldViewTransposed );

	Matrix worldViewInv = Inverse( worldView );
	data->m_data.m_worldViewInv = Transpose( worldViewInv );
	data->m_data.m_eyePosLocal = TransformCoord( Vector3( 0.f, 0.f, 0.f ), worldViewInv );

	const float fakeNearPlane = 500;
	// We modify the original projection matrix by changing clip planes to avoid precision problems
	Matrix fakeProjection = Tr2Renderer::GetProjectionTransform();
	fakeProjection._33 = -1;
	fakeProjection._43 = -fakeNearPlane * 2;
	data->m_data.m_projectionInv = Transpose( Inverse( fakeProjection ) );

	data->m_data.m_screenDepth = TransformCoord( Vector3( 0.f, 0.f, 0.f ), worldViewProjection ).z;

	AxisAlignedBoundingBox box;
	GetProjectedCubeBounds( box, m_worldTransform * Tr2Renderer::GetViewTransform(), fakeProjection, 1, m_min, m_max );

	data->m_data.m_screenSize.x = box.m_min.x;
	data->m_data.m_screenSize.y = box.m_min.y;
	data->m_data.m_screenSize.z = box.m_max.x;
	data->m_data.m_screenSize.w = box.m_max.y;

	unsigned w, h;
	Tr2Renderer::GetBackBufferDimensions( w, h );
	float x = ( box.m_max.x - box.m_min.x ) * w;
	float y = ( box.m_max.y - box.m_min.y ) * w;
	float size = std::max( x, y ) / m_preTesselationLevel;
	size /= m_lastLodFactor;

	m_currentIB = 0;
	while( size < m_cellScreenSize && m_currentIB + 1 < m_indexBuffers.size() )
	{
		size *= 2;
		m_currentIB += 1;
	}

	return data;
}