io_scene_3ds/__init__.py

@@ -16,7 +16,7 @@ import bpy
 bl_info = {
     "name": "Autodesk 3DS format",
     "author": "Bob Holcomb, Campbell Barton, Andreas Atteneder, Sebastian Schrand",
-    "version": (2, 4, 1),
+    "version": (2, 4, 3),
     "blender": (3, 6, 0),
     "location": "File > Import-Export",
     "description": "3DS Import/Export meshes, UVs, materials, textures, "
@@ -109,6 +109,11 @@ class Export3DS(bpy.types.Operator, ExportHelper):
         description="Export selected objects only",
         default=False,
     )
+    use_hierarchy: bpy.props.BoolProperty(
+        name="Export Hierarchy",
+        description="Export hierarchy chunks",
+        default=False,
+    )
     write_keyframe: BoolProperty(
         name="Write Keyframe",
         description="Write the keyframe data",

io_scene_3ds/export_3ds.py

@@ -87,6 +87,8 @@ MASTERSCALE = 0x0100  # Master scale factor
 OBJECT_MESH = 0x4100  # This lets us know that we are reading a new object
 OBJECT_LIGHT = 0x4600  # This lets us know we are reading a light object
 OBJECT_CAMERA = 0x4700  # This lets us know we are reading a camera object
+OBJECT_HIERARCHY = 0x4F00  # Hierarchy id of the object
+OBJECT_PARENT = 0x4F10  # Parent id of the object
 
 # >------ Sub defines of LIGHT
 LIGHT_MULTIPLIER = 0x465B  # The light energy factor
@@ -1477,7 +1479,7 @@ def make_ambient_node(world):
 # EXPORT #
 ##########
 
-def save(operator, context, filepath="", use_selection=False, write_keyframe=False, global_matrix=None):
+def save(operator, context, filepath="", use_selection=False, use_hierarchy=False, write_keyframe=False, global_matrix=None):
 
     """Save the Blender scene to a 3ds file."""
     # Time the export
@@ -1608,6 +1610,7 @@ def save(operator, context, filepath="", use_selection=False, write_keyframe=Fal
     scale = {}
 
     # Give all objects a unique ID and build a dictionary from object name to object id
+    object_id = {}
     name_id = {}
 
     for ob, data, matrix in mesh_objects:
@@ -1615,6 +1618,7 @@ def save(operator, context, filepath="", use_selection=False, write_keyframe=Fal
         rotation[ob.name] = ob.rotation_euler.to_quaternion().inverted()
         scale[ob.name] = ob.scale
         name_id[ob.name] = len(name_id)
+        object_id[ob.name] = len(object_id)
 
     for ob in empty_objects:
         translation[ob.name] = ob.location
@@ -1622,6 +1626,12 @@ def save(operator, context, filepath="", use_selection=False, write_keyframe=Fal
         scale[ob.name] = ob.scale
         name_id[ob.name] = len(name_id)
 
+    for ob in light_objects:
+        object_id[ob.name] = len(object_id)
+
+    for ob in camera_objects:
+        object_id[ob.name] = len(object_id)
+
     # Create object chunks for all meshes
     i = 0
     for ob, mesh, matrix in mesh_objects:
@@ -1633,20 +1643,32 @@ def save(operator, context, filepath="", use_selection=False, write_keyframe=Fal
         # Make a mesh chunk out of the mesh
         object_chunk.add_subchunk(make_mesh_chunk(ob, mesh, matrix, materialDict, translation))
 
-        # Ensure the mesh has no over sized arrays, skip ones that do!
+        # Add hierachy chunk with ID from object_id dictionary
+        if use_hierarchy:
+            obj_hierarchy_chunk = _3ds_chunk(OBJECT_HIERARCHY)
+            obj_hierarchy_chunk.add_variable("hierarchy", _3ds_ushort(object_id[ob.name]))
+
+            # Add parent chunk if object has a parent
+            if ob.parent is not None and (ob.parent.name in object_id):
+                obj_parent_chunk = _3ds_chunk(OBJECT_PARENT)
+                obj_parent_chunk.add_variable("parent", _3ds_ushort(object_id[ob.parent.name]))
+                obj_hierarchy_chunk.add_subchunk(obj_parent_chunk)
+            object_chunk.add_subchunk(obj_hierarchy_chunk)
+
+        # ensure the mesh has no over sized arrays - skip ones that do!
         # Otherwise we cant write since the array size wont fit into USHORT
         if object_chunk.validate():
             object_info.add_subchunk(object_chunk)
         else:
             operator.report({'WARNING'}, "Object %r can't be written into a 3DS file")
 
-        # Export kf object node
+        # Export object node
         if write_keyframe:
             kfdata.add_subchunk(make_object_node(ob, translation, rotation, scale, name_id))
 
         i += i
 
-    # Create chunks for all empties, only requires a kf object node
+    # Create chunks for all empties - only requires a object node
     if write_keyframe:
         for ob in empty_objects:
             kfdata.add_subchunk(make_object_node(ob, translation, rotation, scale, name_id))
@@ -1654,15 +1676,15 @@ def save(operator, context, filepath="", use_selection=False, write_keyframe=Fal
     # Create light object chunks
     for ob in light_objects:
         object_chunk = _3ds_chunk(OBJECT)
-        light_chunk = _3ds_chunk(OBJECT_LIGHT)
+        obj_light_chunk = _3ds_chunk(OBJECT_LIGHT)
         color_float_chunk = _3ds_chunk(RGB)
-        energy_factor = _3ds_chunk(LIGHT_MULTIPLIER)
+        light_energy_factor = _3ds_chunk(LIGHT_MULTIPLIER)
         object_chunk.add_variable("light", _3ds_string(sane_name(ob.name)))
-        light_chunk.add_variable("location", _3ds_point_3d(ob.location))
+        obj_light_chunk.add_variable("location", _3ds_point_3d(ob.location))
         color_float_chunk.add_variable("color", _3ds_float_color(ob.data.color))
-        energy_factor.add_variable("energy", _3ds_float(ob.data.energy * 0.001))
+        light_energy_factor.add_variable("energy", _3ds_float(ob.data.energy * 0.001))
-        light_chunk.add_subchunk(color_float_chunk)
+        obj_light_chunk.add_subchunk(color_float_chunk)
-        light_chunk.add_subchunk(energy_factor)
+        obj_light_chunk.add_subchunk(light_energy_factor)
 
         if ob.data.type == 'SPOT':
             cone_angle = math.degrees(ob.data.spot_size)
@@ -1684,10 +1706,24 @@ def save(operator, context, filepath="", use_selection=False, write_keyframe=Fal
             if ob.data.use_square:
                 spot_square_chunk = _3ds_chunk(LIGHT_SPOT_RECTANGLE)
                 spotlight_chunk.add_subchunk(spot_square_chunk)
-            light_chunk.add_subchunk(spotlight_chunk)
+            obj_light_chunk.add_subchunk(spotlight_chunk)
 
-        # Add light to object info
+        # Add light to object chunk
-        object_chunk.add_subchunk(light_chunk)
+        object_chunk.add_subchunk(obj_light_chunk)
+
+        # Add hierachy chunks with ID from object_id dictionary
+        if use_hierarchy:
+            obj_hierarchy_chunk = _3ds_chunk(OBJECT_HIERARCHY)
+            obj_parent_chunk = _3ds_chunk(OBJECT_PARENT)
+            obj_hierarchy_chunk.add_variable("hierarchy", _3ds_ushort(object_id[ob.name]))
+            if ob.parent is None or (ob.parent.name not in object_id):
+                obj_parent_chunk.add_variable("parent", _3ds_ushort(ROOT_OBJECT))
+            else:  # Get the parent ID from the object_id dict
+                obj_parent_chunk.add_variable("parent", _3ds_ushort(object_id[ob.parent.name]))
+            obj_hierarchy_chunk.add_subchunk(obj_parent_chunk)
+            object_chunk.add_subchunk(obj_hierarchy_chunk)
+
+        # Add light object and hierarchy chunks to object info
         object_info.add_subchunk(object_chunk)
 
         # Export light and spotlight target node
@@ -1714,6 +1750,20 @@ def save(operator, context, filepath="", use_selection=False, write_keyframe=Fal
         camera_chunk.add_variable("roll", _3ds_float(round(ob.rotation_euler[1], 6)))
         camera_chunk.add_variable("lens", _3ds_float(ob.data.lens))
         object_chunk.add_subchunk(camera_chunk)
+
+        # Add hierachy chunks with ID from object_id dictionary
+        if use_hierarchy:
+            obj_hierarchy_chunk = _3ds_chunk(OBJECT_HIERARCHY)
+            obj_parent_chunk = _3ds_chunk(OBJECT_PARENT)
+            obj_hierarchy_chunk.add_variable("hierarchy", _3ds_ushort(object_id[ob.name]))
+            if ob.parent is None or (ob.parent.name not in object_id):
+                obj_parent_chunk.add_variable("parent", _3ds_ushort(ROOT_OBJECT))
+            else:  # Get the parent ID from the object_id dict
+                obj_parent_chunk.add_variable("parent", _3ds_ushort(object_id[ob.parent.name]))
+            obj_hierarchy_chunk.add_subchunk(obj_parent_chunk)
+            object_chunk.add_subchunk(obj_hierarchy_chunk)
+
+        # Add light object and hierarchy chunks to object info
         object_info.add_subchunk(object_chunk)
 
         # Export camera and target node

io_scene_3ds/import_3ds.py

@@ -92,6 +92,8 @@ MAT_MAP_BCOL = 0xA368  # Blue mapping
 OBJECT_MESH = 0x4100  # This lets us know that we are reading a new object
 OBJECT_LIGHT = 0x4600  # This lets us know we are reading a light object
 OBJECT_CAMERA = 0x4700  # This lets us know we are reading a camera object
+OBJECT_HIERARCHY = 0x4F00  # This lets us know the hierachy id of the object
+OBJECT_PARENT = 0x4F10  # This lets us know the parent id of the object
 
 # >------ Sub defines of LIGHT
 LIGHT_SPOTLIGHT = 0x4610  # The target of a spotlight
@@ -322,6 +324,9 @@ def add_texture_to_material(image, contextWrapper, pct, extend, alpha, scale, of
     contextWrapper._grid_to_location(1, 0, dst_node=contextWrapper.node_out, ref_node=shader)
 
 
+childs_list = []
+parent_list = []
+
 def process_next_chunk(context, file, previous_chunk, imported_objects, CONSTRAIN, IMAGE_SEARCH, WORLD_MATRIX, KEYFRAME, CONVERSE):
 
     contextObName = None
@@ -461,6 +466,7 @@ def process_next_chunk(context, file, previous_chunk, imported_objects, CONSTRAI
     temp_chunk = Chunk()
 
     CreateBlenderObject = False
+    CreateCameraObject = False
     CreateLightObject = False
     CreateTrackData = False
 
@@ -924,6 +930,23 @@ def process_next_chunk(context, file, previous_chunk, imported_objects, CONSTRAI
             contextMatrix = mathutils.Matrix(
                 (data[:3] + [0], data[3:6] + [0], data[6:9] + [0], data[9:] + [1])).transposed()
 
+        # If hierarchy chunk
+        elif new_chunk.ID == OBJECT_HIERARCHY:
+            child_id = read_short(new_chunk)
+            childs_list.insert(child_id, contextObName)
+            parent_list.insert(child_id, None)
+            if child_id in parent_list:
+                idp = parent_list.index(child_id)
+                parent_list[idp] = contextObName
+        elif new_chunk.ID == OBJECT_PARENT:
+            parent_id = read_short(new_chunk)
+            if parent_id > len(childs_list):
+                parent_list[child_id] = parent_id
+                parent_list.extend([None]*(parent_id-len(parent_list)))
+                parent_list.insert(parent_id, contextObName)
+            elif parent_id < len(childs_list):
+                parent_list[child_id] = childs_list[parent_id]
+
         # If light chunk
         elif contextObName and new_chunk.ID == OBJECT_LIGHT:  # Basic lamp support
             newLamp = bpy.data.lights.new("Lamp", 'POINT')
@@ -934,9 +957,9 @@ def process_next_chunk(context, file, previous_chunk, imported_objects, CONSTRAI
             temp_data = file.read(SZ_3FLOAT)
             contextLamp.location = struct.unpack('<3f', temp_data)
             new_chunk.bytes_read += SZ_3FLOAT
-            contextMatrix = None  # Reset matrix
             CreateBlenderObject = False
             CreateLightObject = True
+            contextMatrix = None  # Reset matrix
         elif CreateLightObject and new_chunk.ID == COLOR_F:  # Light color
             temp_data = file.read(SZ_3FLOAT)
             contextLamp.data.color = struct.unpack('<3f', temp_data)
@@ -973,6 +996,21 @@ def process_next_chunk(context, file, previous_chunk, imported_objects, CONSTRAI
             contextLamp.data.show_cone = True
         elif CreateLightObject and new_chunk.ID == LIGHT_SPOT_RECTANGLE:  # Square
             contextLamp.data.use_square = True
+        elif CreateLightObject and new_chunk.ID == OBJECT_HIERARCHY:
+            child_id = read_short(new_chunk)
+            childs_list.insert(child_id, contextObName)
+            parent_list.insert(child_id, None)
+            if child_id in parent_list:
+                idp = parent_list.index(child_id)
+                parent_list[idp] = contextObName
+        elif CreateLightObject and new_chunk.ID == OBJECT_PARENT:
+            parent_id = read_short(new_chunk)
+            if parent_id > len(childs_list):
+                parent_list[child_id] = parent_id
+                parent_list.extend([None]*(parent_id-len(parent_list)))
+                parent_list.insert(parent_id, contextObName)
+            elif parent_id < len(childs_list):
+                parent_list[child_id] = childs_list[parent_id]
 
         # If camera chunk
         elif contextObName and new_chunk.ID == OBJECT_CAMERA:  # Basic camera support
@@ -996,8 +1034,24 @@ def process_next_chunk(context, file, previous_chunk, imported_objects, CONSTRAI
             temp_data = file.read(SZ_FLOAT)
             contextCamera.data.lens = float(struct.unpack('<f', temp_data)[0])  # Focus
             new_chunk.bytes_read += SZ_FLOAT
-            contextMatrix = None  # Reset matrix
             CreateBlenderObject = False
+            CreateCameraObject = True
+            contextMatrix = None  # Reset matrix
+        elif CreateCameraObject and new_chunk.ID == OBJECT_HIERARCHY:
+            child_id = read_short(new_chunk)
+            childs_list.insert(child_id, contextObName)
+            parent_list.insert(child_id, None)
+            if child_id in parent_list:
+                idp = parent_list.index(child_id)
+                parent_list[idp] = contextObName
+        elif CreateCameraObject and new_chunk.ID == OBJECT_PARENT:
+            parent_id = read_short(new_chunk)
+            if parent_id > len(childs_list):
+                parent_list[child_id] = parent_id
+                parent_list.extend([None]*(parent_id-len(parent_list)))
+                parent_list.insert(parent_id, contextObName)
+            elif parent_id < len(childs_list):
+                parent_list[child_id] = childs_list[parent_id]
 
         # start keyframe section
         elif new_chunk.ID == EDITKEYFRAME:
@@ -1296,12 +1350,22 @@ def process_next_chunk(context, file, previous_chunk, imported_objects, CONSTRAI
 
         #pivot_list[ind] += pivot_list[parent]  # Not sure this is correct, should parent space matrix be applied before combining?
 
+    # if parent name
     for par, objs in parent_dictionary.items():
         parent = object_dictionary.get(par)
         for ob in objs:
             if parent is not None:
                 ob.parent = parent
 
+    # If hierarchy
+    hierarchy = dict(zip(childs_list, parent_list))
+    hierarchy.pop(None, ...)
+    for idt, (child, parent) in enumerate(hierarchy.items()):
+        child_obj = object_dictionary.get(child)
+        parent_obj = object_dictionary.get(parent)
+        if child_obj and parent_obj is not None:
+            child_obj.parent = parent_obj
+
     # fix pivots
     for ind, ob in enumerate(object_list):
         if ob.type == 'MESH':
@@ -1312,14 +1376,7 @@ def process_next_chunk(context, file, previous_chunk, imported_objects, CONSTRAI
             ob.data.transform(pivot_matrix)
 
 
-def load_3ds(filepath,
+def load_3ds(filepath, context, CONSTRAIN=10.0, IMAGE_SEARCH=True, WORLD_MATRIX=False, KEYFRAME=True, APPLY_MATRIX=True, CONVERSE=None):
-             context,
-             CONSTRAIN=10.0,
-             IMAGE_SEARCH=True,
-             WORLD_MATRIX=False,
-             KEYFRAME=True,
-             APPLY_MATRIX=True,
-             CONVERSE=None):
 
     print("importing 3DS: %r..." % (filepath), end="")