anchor.diff:    (c :float)
     (d :float))
   
  +#-old-assimp
   (cffi:defcfun ("aiTransformVecByMatrix3" ai-transform-vec-by-matrix-3) :void
     (vec :pointer)
     (mat :pointer))
   
  +#-old-assimp
   (cffi:defcfun ("aiTransformVecByMatrix4" ai-transform-vec-by-matrix-4) :void
     (vec :pointer)
     (mat :pointer))
   
  +#-old-assimp
   (cffi:defcfun ("aiDetachLogStream" ai-detach-log-stream) ai-return
     (stream :pointer))
   
  
positive.code: 
  (cffi:defcfun ("aiReleaseImport" ai-release-import) :void (p-scene :pointer))
  
  (cffi:defcfun ("aiTransposeMatrix3" ai-transpose-matrix-3) :void (mat :pointer))
  
  (cffi:defcfun ("aiTransposeMatrix4" ai-transpose-matrix-4) :void (mat :pointer))
  
  (cffi:defcfun ("aiMultiplyMatrix3" ai-multiply-matrix-3) :void (dst :pointer)
                (src :pointer))
  
  (cffi:defcfun ("aiMultiplyMatrix4" ai-multiply-matrix-4) :void (dst :pointer)
                (src :pointer))
  
  
negative.code: 
  (cffi:defcfun ("aiGetVersionRevision" ai-get-version-revision) :unsigned-int)
  
  #-old-assimp
  (cffi:defcfun ("aiIdentityMatrix3" ai-identity-matrix-3) :void (mat :pointer))
  
  #-old-assimp
  (cffi:defcfun ("aiIdentityMatrix4" ai-identity-matrix-4) :void (mat :pointer))
  
  #-old-assimp
  (cffi:defcfun ("aiDetachAllLogStreams" ai-detach-all-log-streams) :void)
  
  (cffi::defctype ai-log-stream-callback :pointer)
  