anchor.diff:    (:ai-component-lights 256)
     (:ai-component-cameras 512)
     (:ai-component-meshes 1024)
  -  (:ai-component-materials 2048)
  -  (:_ai-component-force-32-bit -1610612737))
  +  (:ai-component-materials 2048))
   
   (cffi::defctype ai-file-open-proc :pointer)
   
  
positive.code: 
  (cffi::defctype ai-file-tell-proc :pointer)
  
  (cffi:defcenum ai-component
    (:ai-component-normals 2)
    (:ai-component-tangents-and-bitangents 4)
    (:ai-component-colors 8)
  
negative.code:   (m-time :double)
    (m-value ai-quaternion))
  
  (cffi:defcenum (ai-anim-behaviour :unsigned-int)
    (:ai-anim-behaviour-default 0)
    (:ai-anim-behaviour-constant 1)
    (:ai-anim-behaviour-linear 2)
    (:ai-anim-behaviour-repeat 3))
  
  (cffi:defcstruct ai-node-anim
    (m-node-name ai-string)
  