SetAdditionalVertexStream

This C++ Function is found inside of CAdditionalVertexStreamManager.

It sets an additional vertex stream.

It can be found in Client/Client Core/Sources/CAdditionalVertexStreamManager.cpp in Visual Studio.

Required Arguments

• state: To be defined.

Code

void CAdditionalVertexStreamManager::SetAdditionalVertexStream ( SCurrentStateInfo& state ) {

   HRESULT hr;

   // Get matching custom N vbuffer for std PT vbuffer
   SAdditionalStreamInfo* pAdditionalInfo = GetAdditionalStreamInfo ( state.stream1.pStreamData );
   if ( !pAdditionalInfo )
       pAdditionalInfo = CreateAdditionalStreamInfo ( state );

   uint StridePT = 20;
   uint StrideN = 12;

   // Calc area we are going to use
   uint viMinBased = state.args.MinVertexIndex + state.args.BaseVertexIndex;
   uint viMaxBased = state.args.MinVertexIndex + state.args.NumVertices + state.args.BaseVertexIndex;

   uint ReadOffsetStart = viMinBased * StridePT + state.stream1.OffsetInBytes;
   uint ReadOffsetSize = ( viMaxBased - viMinBased ) * StridePT;

   uint OffsetInBytesN = ConvertPTSize ( state.stream1.OffsetInBytes );
   uint WriteOffsetStart = viMinBased * StrideN + OffsetInBytesN;
   uint WriteOffsetSize = ( viMaxBased - viMinBased ) * StrideN;

   assert ( WriteOffsetStart == ConvertPTSize ( ReadOffsetStart ) );
   assert ( WriteOffsetSize == ConvertPTSize ( ReadOffsetSize ) );

   // See if area VB area needs updating
   if ( !pAdditionalInfo->ConvertedRanges.IsRangeSet ( WriteOffsetStart, WriteOffsetSize ) )
   {
       // Update VB area
       UpdateAdditionalStreamContent ( state, pAdditionalInfo, ReadOffsetStart, ReadOffsetSize, WriteOffsetStart, WriteOffsetSize );
       pAdditionalInfo->ConvertedRanges.SetRange ( WriteOffsetStart, WriteOffsetSize );
   }

   // Save old declaration
   hr = m_pDevice->GetVertexDeclaration ( &m_pOldVertexDeclaration );

   // Set declaration
   hr = g_pProxyDevice->SetVertexDeclaration ( pAdditionalInfo->pVertexDeclaration );

   // Set additional stream
   uint OffsetInBytes = ConvertPTSize ( state.stream1.OffsetInBytes );
   hr = m_pDevice->SetStreamSource ( 2, pAdditionalInfo->pStreamData, OffsetInBytes, pAdditionalInfo->Stride );

} </syntaxhighlight>

See Also

• CAdditionalVertexStreamManager