BindVertexbuffer

stride 的意思是　inputstream.layout 的大小

比如　description是　pos uv normal

stride 就是一组pos uv normal的大小

ns  里面

nvn::BufferAddress StartAdress = m_CurrentVertexBuffer[i]->GetAddress(m_CurrentVertexBufferOffset[i]);//m_CurrentVertexBuffer[i]+m_CurrentVertexBufferOffset[i]
size_t BufferSize = m_CurrentVertexBuffer[i]->GetSize() - m_CurrentVertexBufferOffset[i] * sizeof(uint8_t); //@@cz:
m_Commandbuffer->BindVertexBuffer(i , StartAdress, BufferSize);
m_CurrentVertexStreamState[i].SetStride(m_CurrentVertexBufferStrides[i]);//i is slot num

BindVertexBuffer的参数　比dx多了个buffer size是不是可以绑一小块　不用像这样绑这么大　上文绑的是　offset之后所有的