Starting to add content for data framework

dblanding · dblanding · commit 8a62091f34c3 · 2022-11-07T07:45:30.000-05:00
diff --git a/docs/std_doc_services.md b/docs/std_doc_services.md
@@ -0,0 +1,31 @@
+#!/usr/bin/env python
+#
+# Copyright 2022 Doug Blanding (dblanding@gmail.com)
+#
+# This file contains the PythonOCC equivalent code for the C++ code
+# presented in the Open CASCADE Technology OCAF Documentation at:
+# https://dev.opencascade.org/doc/overview/html/occt_user_guides__ocaf.html
+# It has lots of extra snippets of code and print() functions
+# sprinkled in to allow a student to explore the details of OCAF
+# labels and attributes while using PythonOCC rather than C++.
+# :-)
+
+from OCC.Core.TCollection import (TCollection_AsciiString,
+                                  TCollection_ExtendedString)
+from OCC.Core.TDataStd import TDataStd_Integer
+from OCC.Core.TDocStd import TDocStd_Document
+from OCC.Core.TDF import (TDF_Tool, TDF_TagSource,
+                          TDF_ChildIterator,)
+
+
+def get_entry(label):
+    """Return entry of label"""
+    entry_str = TCollection_AsciiString()
+    TDF_Tool.Entry(label, entry_str)
+    entry = entry_str.ToCString()
+    return entry
+
+# Create a document
+title = "Main document"
+doc = TDocStd_Document(TCollection_ExtendedString(title))
+root = doc.Main()
diff --git a/ocaf_data_framework.py b/ocaf_data_framework.py
diff --git a/ocaf_std_doc_srvcs.py b/ocaf_std_doc_srvcs.py
@@ -0,0 +1,41 @@
+#!/usr/bin/env python
+#
+# Copyright 2022 Doug Blanding (dblanding@gmail.com)
+#
+# This file contains the PythonOCC equivalent code for the C++ code
+# presented in the Open CASCADE Technology OCAF Documentation at:
+# https://dev.opencascade.org/doc/overview/html/occt_user_guides__ocaf.html
+#
+
+from OCC.Core.TCollection import (TCollection_AsciiString,
+                                  TCollection_ExtendedString)
+from OCC.Core.TDocStd import TDocStd_Application, TDocStd_Document
+from OCC.Core.XCAFApp import XCAFApp_Application_GetApplication
+from OCC.Extend.DataExchange import read_step_file_with_names_colors
+from OCC.Core.STEPCAFControl import STEPCAFControl_Reader
+from OCC.Core.IFSelect import IFSelect_RetDone
+
+# The Application
+
+# There are several different "flavors" of applications & documents
+# Here, XDE (Extended Data Exchange) has been chosen, enabling STEP
+title = "Main document"
+doc = TDocStd_Document(TCollection_ExtendedString(title))
+"""
+app = XCAFApp_Application_GetApplication()
+app.NewDocument(TCollection_ExtendedString("MDTV-XCAF"), doc)
+"""
+filename = "/home/doug/step-files/as1-oc-214.stp"
+step_reader = STEPCAFControl_Reader()
+step_reader.SetColorMode(True)
+step_reader.SetLayerMode(True)
+step_reader.SetNameMode(True)
+step_reader.SetMatMode(True)
+step_reader.SetGDTMode(True)
+
+status = step_reader.ReadFile(filename)
+if status == IFSelect_RetDone:
+    step_reader.Transfer(doc)
+
+# see if I can retrieve the app from doc
+# app = doc.Application()  # gives runtime error: document has not yet been opened by any application
