io_scene_3ds/__init__.py

@@ -18,7 +18,7 @@ import bpy
 bl_info = {
     "name": "Autodesk 3DS format",
     "author": "Bob Holcomb, Campbell Barton, Andreas Atteneder, Sebastian Schrand",
-    "version": (2, 4, 5),
+    "version": (2, 4, 6),
     "blender": (3, 6, 0),
     "location": "File > Import-Export",
     "description": "3DS Import/Export meshes, UVs, materials, textures, "
@@ -188,13 +188,14 @@ class Export3DS(bpy.types.Operator, ExportHelper):
     )
     object_filter: bpy.props.EnumProperty(
         name="Object Filter", options={'ENUM_FLAG'},
-        items=(('MESH',"Mesh".rjust(11),"",'MESH_DATA',0x1),
-                ('LIGHT',"Light".rjust(12),"",'LIGHT_DATA',0x2),
-                ('CAMERA',"Camera".rjust(11),"",'CAMERA_DATA',0x4),
-                ('EMPTY',"Empty".rjust(11),"",'EMPTY_DATA',0x8),
+        items=(('WORLD', "World".rjust(11), "", 'WORLD_DATA',0x1),
+               ('MESH', "Mesh".rjust(11), "", 'MESH_DATA', 0x2),
+               ('LIGHT', "Light".rjust(12), "", 'LIGHT_DATA',0x4),
+               ('CAMERA', "Camera".rjust(11), "", 'CAMERA_DATA',0x8),
+               ('EMPTY', "Empty".rjust(11), "", 'EMPTY_DATA',0x10),
                ),
         description="Object types to export",
-        default={'MESH', 'LIGHT', 'CAMERA', 'EMPTY'},
+        default={'WORLD', 'MESH', 'LIGHT', 'CAMERA', 'EMPTY'},
     )
     use_hierarchy: BoolProperty(
         name="Export Hierarchy",
@@ -248,10 +249,8 @@ class MAX3DS_PT_export_include(bpy.types.Panel):
         operator = sfile.active_operator
 
         layout.prop(operator, "use_selection")
-        laysub = layout.column(align=True)
-        laysub.enabled = (not operator.use_selection)
-        laysub.prop(operator, "object_filter")
-        layout.column().prop(operator, "use_hierarchy")
+        layout.column().prop(operator, "object_filter")
+        layout.prop(operator, "use_hierarchy")
         layout.prop(operator, "write_keyframe")
 
 

io_scene_3ds/export_3ds.py

@@ -30,6 +30,12 @@ KFDATA = 0xB000  # This is the header for all of the keyframe info
 # >----- sub defines of OBJECTINFO
 OBJECTINFO = 0x3D3D  # Main mesh object chunk before material and object information
 MESHVERSION = 0x3D3E  # This gives the version of the mesh
+BITMAP = 0x1100  # The background image name
+USE_BITMAP = 0x1101  # The background image flag
+SOLIDBACKGND = 0x1200  # The background color (RGB)
+USE_SOLIDBGND = 0x1201  # The background color flag
+VGRADIENT = 0x1300  # The background gradient colors
+USE_VGRADIENT = 0x1301  # The background gradient flag
 AMBIENTLIGHT = 0x2100  # The color of the ambient light
 MATERIAL = 45055  # 0xAFFF // This stored the texture info
 OBJECT = 16384  # 0x4000 // This stores the faces, vertices, etc...
@@ -1549,13 +1555,30 @@ def save(operator, context, filepath="", scale_factor=1.0, apply_unit=False, use
         curtime = scene.frame_current
         kfdata = make_kfdata(revision, start, stop, curtime)
 
-    # Add AMBIENT color
-    if world is not None:
+    # Add AMBIENT and BACKGROUND color
+    if world is not None and 'WORLD' in object_filter:
         ambient_chunk = _3ds_chunk(AMBIENTLIGHT)
         ambient_light = _3ds_chunk(RGB)
         ambient_light.add_variable("ambient", _3ds_float_color(world.color))
         ambient_chunk.add_subchunk(ambient_light)
         object_info.add_subchunk(ambient_chunk)
+        if world.use_nodes:
+            ntree = world.node_tree.links
+            background_color = _3ds_chunk(RGB)
+            background_chunk = _3ds_chunk(SOLIDBACKGND)
+            background_flag = _3ds_chunk(USE_SOLIDBGND)
+            bgcol, bgtex, nworld = 'BACKGROUND', 'TEX_IMAGE', 'OUTPUT_WORLD'
+            bg_color = next((lk.from_node.inputs[0].default_value[:3] for lk in ntree if lk.to_node.type == nworld), world.color)
+            bg_image = next((lk.from_node.image.name for lk in ntree if lk.from_node.type == bgtex and lk.to_node.type in {bgcol, nworld}), False)
+            background_color.add_variable("color", _3ds_float_color(bg_color))
+            background_chunk.add_subchunk(background_color)
+            if bg_image:
+                background_image = _3ds_chunk(BITMAP)
+                background_flag = _3ds_chunk(USE_BITMAP)
+                background_image.add_variable("image", _3ds_string(sane_name(bg_image)))
+                object_info.add_subchunk(background_image)
+            object_info.add_subchunk(background_chunk)
+            object_info.add_subchunk(background_flag)
         if write_keyframe and world.animation_data:
             kfdata.add_subchunk(make_ambient_node(world))
 
@@ -1564,7 +1587,7 @@ def save(operator, context, filepath="", scale_factor=1.0, apply_unit=False, use
     mesh_objects = []
 
     if use_selection:
-        objects = [ob for ob in scene.objects if ob.visible_get(view_layer=layer) and ob.select_get(view_layer=layer)]
+        objects = [ob for ob in scene.objects if ob.type in object_filter and ob.visible_get(view_layer=layer) and ob.select_get(view_layer=layer)]
     else:
         objects = [ob for ob in scene.objects if ob.type in object_filter and ob.visible_get(view_layer=layer)]