   D3DXMATRIXA16
  I am having problems with finding a dx8 substitute for D3DXMATRIXA16. I cannot change to dx9 for various reasons, so what can I use instead for creating a matrix? 
  d3dxmatrix? ;  You''re changing TO D3D9 FROM D3D8 or the otherway?   --You''re Welcome,Rick Wong- Google | Google for GameDev.net | GameDev.net''s DirectX FAQ. (not as cool as the Graphics and Theory FAQ) ;  D3DXMATRIXA16 exists in DirectX 8 too so you don''t need to change to DirectX 9 to use it!Do note that if you''re using version 6 of Visual C++, you''ll need to install VC++ Service Pack 4 and The Processor Pack to get any real benefit from the aligned matrices (without those, the compiler doesn''t understand __declspec(align(x)) which D3DXMATRIXA16 uses).  VC++ 7 (MSVC .NET) already have alignment and SSE/3DNow! support.   Simon O''ConnorGame Programmer &Microsoft DirectX MVP;  Simon, you''re so smart  --You''re Welcome,Rick Wong- Google | Google for GameDev.net | GameDev.net''s DirectX FAQ. (not as cool as the Graphics and Theory FAQ) ;  Hmm, I just did some digging through my archive of older SDKs, and I have to clarify what I wrote above:D3DXMATRIXA16 was introduced in DirectX 8.1, so if you have the DirectX 8.0 SDK, you won''t have support for it.A simple solution if this is the OP''s issue is to install the DirectX 8.1   SDK - any code which is written for DirectX 8.0 interfaces should compile just fine with DirectX 8.1. Simon O''ConnorGame Programmer &Microsoft DirectX MVP