type CubismModel = private { __ : unit }
type UniqueString = unit
type KnobId = UniqueString
type KnobFriendlyName = string
type KnobSetting = single
type CubismPoseId = UniqueString

type KnobMetadata =
    { Min : single
      Max : single
      Default : Map<KnobId, KnobSetting>
      KnobFriendlyName : KnobFriendlyName }

type CubismPose =
    { KnobSettings : Map<KnobId, KnobSetting> }

type CubismModelInstance =
    { ModelContainerMemoryPtr : voidptr
      ModelMemoryPtr : voidptr
      ModelContainerPtr : nativeint
      ModelPtr : nativeint }

type CubismInstance =
    { CubismModelInstances : Map<CubismModel AssetTag, CubismModelInstance> }

type CubismContext =
    { CubismInstance : CubismInstance
      KnobDefaultses : Map<CubismModel AssetTag, Map<KnobId, KnobSetting>> // TODO: consider making all map<id,settings> poses.
      KnobMetadatases : Map<CubismModel AssetTag, Map<KnobId, KnobMetadata>>
      CubismPoses : Map<CubismModel AssetTag, Map<CubismPoseId, CubismPose>> }

type CubismModelDescriptor =
    { KnobSettings : Map<KnobId, KnobSetting> (* low-level algebra *)
      CubismPoseOpt : Choice<unit, CubismPoseId, single * CubismPoseId * CubismPoseId> (* high-level algebra *) }

type CubismModelMetadata =
    { KnobDefaults : Map<KnobId, KnobSetting>
      KnobMetadatas : Map<KnobId, KnobMetadata> }