update plugin.

- sync PyBMap work. use different library name in different OS.
- add BMap encoding default value according to different OS (Windows and non-Windows) because non-Windows OS, we use libiconv as encoding converter.
- move all pointer properties to a single module and give corresponding visitor.
- add shared importer exporter parameters module thus bmfile import/export also can ref it.

bbp_ng/OP_EXPORT_virtools.py

@@ -1,8 +1,11 @@
 import bpy
-from . import PROP_preferences, UTIL_functions, UTIL_file_browser, UTIL_blender_mesh
+from bpy_extras.wm_utils.progress_report import ProgressReport
+import tempfile, os, typing
+from . import PROP_preferences, PROP_ptrprop_resolver, UTIL_ioport_shared
+from . import UTIL_functions, UTIL_file_browser, UTIL_blender_mesh, UTIL_icons_manager
 from .PyBMap import bmap_wrapper as bmap
 
-class BBP_OT_export_virtools(bpy.types.Operator, UTIL_file_browser.ExportVirtoolsFile):
+class BBP_OT_export_virtools(bpy.types.Operator, UTIL_file_browser.ExportVirtoolsFile, UTIL_ioport_shared.ExportParams, UTIL_ioport_shared.VirtoolsParams):
     """Export Virtools File"""
     bl_idname = "bbp.export_virtools"
     bl_label = "Export Virtools File"
@@ -15,12 +18,50 @@ class BBP_OT_export_virtools(bpy.types.Operator, UTIL_file_browser.ExportVirtool
             and bmap.is_bmap_available())
     
     def execute(self, context):
-        UTIL_functions.message_box((self.general_get_filename(), ), 'Export Virtools File Path', 'INFO')
+        # check selecting first
+        objls: tuple[bpy.types.Object] | None = self.general_get_export_objects()
+        if objls is None:
+            UTIL_functions.message_box(
+                ('No selected target!', ), 
+                'Lost Parameters', 
+                UTIL_icons_manager.BlenderPresetIcons.Error.value
+            )
+            return {'CANCELLED'}
+
+        # start exporting
+        with UTIL_ioport_shared.ExportEditModeBackup() as editmode_guard:
+            _export_virtools(
+                self.general_get_filename(),
+                self.general_get_vt_encodings(),
+                objls
+            )
+
         self.report({'INFO'}, "Virtools File Exporting Finished.")
         return {'FINISHED'}
     
     def draw(self, context):
-        pass
+        layout = self.layout
+        layout.label(text = 'Export Target')
+        self.draw_export_params(layout)
+        layout.separator()
+        layout.label(text = 'Virtools Params')
+        self.draw_virtools_params(layout)
+
+def _export_virtools(file_name_: str, encodings_: tuple[str], export_objects: tuple[bpy.types.Object]) -> None:
+    # create temp folder
+    with tempfile.TemporaryDirectory() as vt_temp_folder:
+        print(f'Virtools Engine Temp: {vt_temp_folder}')
+
+        # create virtools reader context
+        with bmap.BMFileWriter(
+            vt_temp_folder,
+            PROP_preferences.get_raw_preferences().mBallanceTextureFolder,
+            encodings_) as writer:
+
+            # prepare progress reporter
+            with ProgressReport(wm = bpy.context.window_manager) as progress:
+                pass
+
 
 def register() -> None:
     bpy.utils.register_class(BBP_OT_export_virtools)