Method BeginUpdateAtlas

trinity/Tr2ImpostorManager.cpp:382–405

-------------------------------------------------------------------------------------- Description: Starts re-rendering of impostor billboards. Should be called before any BeginImpostorUpdate. Arguments: renderContext - Current render context --------------------------------------------------------------------------------------

//   renderContext - Current render context
// --------------------------------------------------------------------------------------
void Tr2ImpostorManager::BeginUpdateAtlas( Tr2RenderContext& renderContext )
{
	if( !m_rt || !m_rt->IsValid() || m_renderQueue.empty() )
	{
		return;
	}

	if( m_atlasDirty )
	{
		renderContext.m_esm.PushDepthStencilBuffer( Tr2TextureAL() );
		renderContext.m_esm.PushRenderTarget( *m_rt );

		renderContext.Clear( Tr2RenderContextEnum::CLEARFLAGS_TARGET, 0, 0 );

		renderContext.m_esm.PopRenderTarget();
		renderContext.m_esm.PopDepthStencilBuffer();
		m_atlasDirty = false;
	}

	renderContext.m_esm.PushRenderTarget( *m_itemRt );
	renderContext.m_esm.PushDepthStencilBuffer( *m_ds );

	renderContext.Clear( Tr2RenderContextEnum::CLEARFLAGS_TARGET | Tr2RenderContextEnum::CLEARFLAGS_ZBUFFER, 0, 0.f );
}

// --------------------------------------------------------------------------------------
// Description: