Function 
(  Instance is used together with node in hierarchy evaluation. 
   In addition to information related to the node, instance also has information regarding the hierarchy. 

Functions 
(  void mhcInstanceInit( MhcInstance *instance_ptr, MhcNode *node_ptr );
  Initializes MhcInstance. 

Macros 
(  _mhcInstanceCopyContext(dest_ptr,src_ptr)
  Copies hierarchy context of MhcInstance. 

(  _mhcInstanceIsReady(instance_ptr)
  Checks whether MhcInstance can be evaluated. 

(  _mhcInstanceEvaluate(instance_ptr,scene_ptr)
  Evaluates MhcInstance. 

History 
  1998/10/12  Takamitsu Hirata 
    Instance.h, instance.c:  Initial version 
