Update geometry export - (Task #20)

Add _export_to_stl function
Update test_full_export_shape_geometry test case

---
Task #20: Add testcases with special shapes to Im- and Exporter

VirtualSatelliteCAD/json_io/parts/json_part_geometry.py

@@ -27,7 +27,7 @@
 
 from json_io.parts.json_part import AJsonPart
 from json_io.json_definitions import JSON_ELEMENT_STL_PATH
-import Mesh  # NOQA @UnresolvedImport
+import Mesh, MeshPart # NOQA @UnresolvedImport
 import Part  # NOQA @UnusedImport
 import os
 
@@ -56,9 +56,16 @@ def read_from_freecad(self, freecad_object, freecad_sheet):
         # use already read in sheet
         self.stl_path = self.sheet.read_sheet_attribute_from_freecad(freecad_sheet, "stl_path")
 
+        # TODO: here?
+        self._export_to_stl(freecad_object)
+
+    # this part has no FreeCAD properties
     def _set_freecad_properties(self, active_document):
         pass
 
+    def _get_freecad_properties(self, geometry):
+        pass
+
     def _get_geometry_name(self):
         geometry_full_path = self.stl_path
         geometry_base_name = os.path.basename(geometry_full_path)
@@ -94,5 +101,15 @@ def _create_freecad_object(self, active_document):
             active_document.gui_active_document.getObject(object_geometry_name + "_form").Visibility = False
             active_document.gui_active_document.getObject(object_geometry_name + "_cleaned").Visibility = False
 
-    def _get_freecad_properties(self, geometry):
-        pass
+    def _export_to_stl(self, freecad_object):
+
+        # object_name_and_type = self.get_shape_type()
+        # document_object = active_document.app_active_document.getObject(object_name_and_type)
+
+        if freecad_object is not None:
+            shape = freecad_object.Shape
+
+            meshed_object = freecad_object.Document.addObject("Mesh::Feature", "Mesh")
+            meshed_object.Mesh = MeshPart.meshFromShape(Shape=shape, MaxLength=520)
+
+            meshed_object.Mesh.write(self.stl_path)

VirtualSatelliteCAD/test/json_io/parts/test_json_part_geometry.py

@@ -34,6 +34,8 @@
 from module.environment import Environment
 from json_io.json_definitions import JSON_ELEMENT_STL_PATH
 from test.json_io.test_json_data import TEST_JSON_PART_GEOMETRY
+from shutil import copyfile
+import os
 
 App = FreeCAD
 Gui = FreeCADGui
@@ -86,7 +88,9 @@ def test_create_and_read_part_geometry(self):
         # get the current module path and get the directory for the test resource
         # place that path into the json object before executing the transformations
         stl_test_resource_path = Environment.get_test_resource_path("Switch.stl")
-        json_object[JSON_ELEMENT_STL_PATH] = stl_test_resource_path
+        stl_test_resource_path_cp = os.path.join(self._WORKING_DIRECTORY, "Switch_cp.stl")
+        copyfile(stl_test_resource_path, stl_test_resource_path_cp)
+        json_object[JSON_ELEMENT_STL_PATH] = stl_test_resource_path_cp
 
         json_part = JsonPartGeometry()
         json_part.parse_from_json(json_object)

VirtualSatelliteCAD/test/json_io/test_json_exporter.py

@@ -27,10 +27,14 @@
 from test.test_setup import AWorkingDirectoryTest
 from json_io.json_importer import JsonImporter
 from json_io.json_exporter import JsonExporter
-from test.json_io.test_json_data import TEST_JSON_FULL_VISCUBE
+from test.json_io.test_json_data import TEST_JSON_FULL_VISCUBE, TEST_JSON_FULL_GEOMETRY
 from json_io.json_definitions import JSON_PRODUCTS, JSON_ELEMNT_CHILDREN, JSON_ELEMENT_NAME, \
-    JSON_ELEMENT_ROT_X, JSON_ELEMENT_ROT_Y, JSON_ELEMENT_ROT_Z
+    JSON_ELEMENT_ROT_X, JSON_ELEMENT_ROT_Y, JSON_ELEMENT_ROT_Z, JSON_ELEMENT_STL_PATH, JSON_PARTS
 import json
+from module.environment import Environment
+import os
+from shutil import copyfile
+import Mesh
 
 
 class TestJsonExporter(AWorkingDirectoryTest):
@@ -75,4 +79,33 @@ def test_full_export_shape_none(self):
         pass
 
     def test_full_export_shape_geometry(self):
-        pass
+        json_importer = JsonImporter(self._WORKING_DIRECTORY)
+        json_object = json.loads(TEST_JSON_FULL_GEOMETRY)
+
+        # get the current module path and get the directory for the test resource
+        # place that path into the json object before executing the transformations
+        stl_test_resource_path = Environment.get_test_resource_path("Switch.stl")
+        stl_test_resource_path_cp = os.path.join(self._WORKING_DIRECTORY, "Switch_cp.stl")
+        copyfile(stl_test_resource_path, stl_test_resource_path_cp)
+        copy_time = os.path.getmtime(stl_test_resource_path_cp)
+        json_object[JSON_PARTS][0][JSON_ELEMENT_STL_PATH] = stl_test_resource_path_cp
+
+        _, _, active_document = json_importer.full_import(json_object)
+
+        json_exporter = JsonExporter(self._WORKING_DIRECTORY)
+        exported_json = json_exporter.full_export(active_document)
+
+        self.assertJsonObjectsAlmostEqual(exported_json, json_object, [], "JSON in and out equal each other", static_keys=[])
+
+        # check time stamps to make sure the file get's overridden
+        last_edit_time = os.path.getmtime(stl_test_resource_path_cp)
+        self.assertGreater(last_edit_time, copy_time, "File got edited after copying it")
+
+        # check STL file meshes almost equal
+        # points will differ, but we assume equality if area and volume are within a delta
+        mesh_before = Mesh.Mesh(stl_test_resource_path)
+        mesh_after = Mesh.Mesh(stl_test_resource_path_cp)
+        delta = 0.1
+
+        self.assertAlmostEqual(float(mesh_before.Area), float(mesh_after.Area), msg="Areas are almost equal", delta=delta)
+        self.assertAlmostEqual(float(mesh_before.Volume), float(mesh_after.Volume), msg="Volumes are almost equal", delta=delta)