Issue 4563:  I haven't found any way to create ModelInstance                                                                                                                                                        (cad-ftf)
Source: Open CASCADE (Mr. Mikhail Kazakov, m-kazakov@opencascade.com, m-kazakov@eads.matradatavision.com)
Nature: Uncategorized Issue
Severity: 
Summary: 7. Creation of ModelInstances. I haven't found any way to create ModelInstance. And it's not explained in the specification. 

Resolution: see above
Revised Text: Added new section 2.2.5, describing new interface:
Section 2.2.5 ModelInstanceFactory Interface
The ModelInstanceFactory interface provides the ability to create ModelInstances which are used to support assemblies. A ModelInstanceFactory is created from the Model interface (Section 2.2.4) and allows the input of location information.

interface ModelInstanceFactory 
  { 
    CadMain::ModelInstance new_model_instance (
        in CadUtility::TransformationStruct  global_location)
        raises (CadUtility::CadError); 
    // Creates a new ModelInstance with initial transformation 
    // according the global coordinate system 
  };



new_model_instance	Returns a created ModelInstance using the input global_location (CadUtility::TransformationStruct, Section 2.7)

Modified section 2.2.2.2, Model Interface, to provide a new operation that creates the ModelInstanceFactory :

new_model_instance_factory	Returns a ModelInstanceFactory (Section 2.2.5) that enables the creation of new ModelInstances.

Actions taken:
September 5, 2001: received issue
July 5, 2002: closed issue
Discussion: 
A ModelInstanceFactory interface was added to the CadMain module. This interface enables the creation of ModelInstances:
  interface ModelInstanceFactory 
  { 
    CadMain::ModelInstance new_model_instance (
     in CadUtility::TransformationStruct  global_location) 
     raises (CadUtility::CadError); 
    // Creates a new ModelInstance with initial transformation
    // according the global coordinate system 
  };
An operation was added to the Model interface to support access to this interface:
   ModelInstanceFactory new_model_instance_factory () 
      raises (CadUtility::CadError); 
   //Creates the ModelInstanceFactory, which is used to 
   // add ModelInstances

End of Annotations:=====
Date: Wed, 05 Sep 2001 13:13:07 +0200
From: "Mikhail KAZAKOV (mko)" <m-kazakov@paris1.matra-dtv.fr>
Organization: Matra Datavision
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To: "jcad_services@yahoogroups.com" <jcad_services@yahoogroups.com>,
   cad ftf <cad-ftf@emerald.omg.org>
Subject: New issues to resolve
References: <5.1.0.14.2.20010829112031.03733d48@popserve.grc.nasa.gov>
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X-UIDL: VF6e98+\!!WWYd9f3=e9

                Dear colleagues, 

I've just returned from vacation (thus sorry for silence) 
and I would like to give some new issues according our spec. to
resolve: 


7. Creation of ModelInstances. I haven't found any way to create
   ModelInstance. And it's not explained in the specification. 

Date: Thu, 20 Sep 2001 20:09:53 +0200
From: "Mikhail KAZAKOV (mko)" <m-kazakov@paris1.matra-dtv.fr>
Organization: Matra Datavision
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MIME-Version: 1.0
To: cad ftf <cad-ftf@emerald.omg.org>,
   "jcad_services@yahoogroups.com" <jcad_services@yahoogroups.com>
Subject: Proposals for issues resolution
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X-UIDL: o$Fe97[c!!)``d9diTd9

        Dear colleagues, 

I'd like to propose some possible ways to resolve next issues: 





Issue 4563 Creation of ModelInstances 

Possible resolutions: 
Creation of new ModelInstanceFactory interface in CadFoundation
module: 

interface ModelInstanceFactory 
{ 
    CadMain::ModelInstance new_model_instance (in
    CadUtility::TransformationStruct  transformation) raises
    (CadUtility::CadError); 
    // Creates a new ModelInstance with initial transofmration
    according the global coordinate system 
} 

+ 

add new methods to Model interface 

interface Model : CadFoundation::Attributable 
{ 
    ... 
    ModelInstanceFactory new_model_instance_factory () raises
    (CadUtility::CadError); 
   //Creates the ModelInstanceFactory, which is used to add
   ModelInstances 

    void add_as_child(in Model mode) raises (CadUtility::CadError); 

    void remove_from_childs(in Model model) raises
    (CadUtility::CadError); 
    ... 
}