Support UE 5+ Blender 3+ (#3)

functions/sut_make_mesh.py

@@ -11,11 +11,11 @@ def make_single_mesh(selected_collection, context):
     # For scene / own global variables
     sut_tool = context.scene.sut_tool
 
-    # Go into object mode (maybe actually check stuff instead of this)
-    try:
-        bpy.ops.object.mode_set(mode="OBJECT")
-    except:
-        pass
+    # Avoid "Operator bpy.ops.object.mode_set.poll() Context missing active object"
+    context.view_layer.objects.active = selected_collection.all_objects[0]
+
+    # Go into object mode
+    bpy.ops.object.mode_set(mode='OBJECT')
 
     # Deselect everything
     bpy.ops.object.select_all(action='DESELECT')

operator/sut_op.py

@@ -36,11 +36,13 @@ def execute(self, context):
 
         # Every collection gets merged into it's own unique mesh (or all collections is a single big mesh)
         greybox_collection = bpy.data.collections[sut_tool.greybox_col_name]
-        if sut_tool.every_col_is_own_mesh is True:
+        greybox_col_has_child_col = len(greybox_collection.children) > 0 # Avoid bug + we don't support deeply nested collections
+        if sut_tool.every_col_is_own_mesh is True and greybox_col_has_child_col is True:
             # Get final collection, loop over every child collection and run make_single_mesh
             for col in greybox_collection.children:
-                make_single_mesh(col, context)
-        else:
+                if len(col.all_objects) > 0:
+                    make_single_mesh(col, context)
+        elif len(greybox_collection.all_objects) > 0:
             make_single_mesh(greybox_collection, context)
 
         # For every single object in the final collection, set the texel density

panel/sut_panel.py

@@ -4,12 +4,12 @@
 
 # Add to this list after adding a property to SutProperties
 UI_PROPERTIES = [
-    "sut_island_margin",
-    "sut_angle_limit",
+    # "sut_island_margin", # Disabling to cleanup UI
+    # "sut_angle_limit", # Disabling to cleanup UI
     "sut_texture_size",
     "sut_texel_density",
     "greybox_col_name",
-    "final_col_name",
+    # "final_col_name", # Seems to be hardcoded now, so disabled this from the UI
     "auto_smooth_angle",
     "auto_smooth_enable",
     "every_col_is_own_mesh",

panel/sut_properties.py

@@ -18,7 +18,7 @@ class SutProperties(PropertyGroup):
         max=5,
         step=0.01,
         precision=3,
-        default=0.005
+        default=0.02
     )
 
     sut_angle_limit: FloatProperty(
@@ -61,7 +61,7 @@ class SutProperties(PropertyGroup):
     every_col_is_own_mesh: BoolProperty(
         name="Seperate Child Collection Meshes",
         description="Check if you want every collection to be their own seperate merged mesh\n(Origin will still be world origin)",
-        default = False
+        default = True
     )
 
     sut_send_to_unreal: BoolProperty(
@@ -78,8 +78,8 @@ class SutProperties(PropertyGroup):
 
     final_col_name: StringProperty(
         name="Final Coll. Name",
-        description="Final collection for unreal engine, default is 'Mesh' from the UE Tools addon",
-        default = "Mesh"
+        description="Final collection for unreal engine.",
+        default = "Export" # Seems to be hardcoded now, so disabled this from the UI
     )
 
     auto_smooth_angle: StringProperty(

readme.md

@@ -15,24 +15,18 @@ Depends on the following addons:
 2. [Send To Unreal Github](https://github.com/EpicGames/BlenderTools) (You need to follow this: https://www.unrealengine.com/en-US/blog/download-our-new-blender-addons)
 
 # Setup
-1. Follow the "Send to Unreal" steps (which includes enabling remote execution in unreal & python scripting)
-  * I recommend going to options and setting "Mesh Folder(Unreal)" to: /Game/Meshes/Dev (or anything you want)
-  * Go to the export settings tab, and select "Use object origin"
-2. Create Greybox colleciton defaulting to "Collection" (or change it).
-3. Do the greyboxing / level designing you need to do. Everything gets merged into a single mesh (unless you check Split collection result).
-4. Tick "Send to Unreal" and press SUT
-5. In Unreal go top left -> Edit -> Project Settings -> Search for "Default Shape Complexity" and select "Use Complex Collision as Simple". 
-  * When you are done greyboxing this should be turned back OFF
-6. In Unreal drag the Meshes/Dev/SM_COLLECTION into your scene, and click the yellow little arrow in the transform panel, to reset it to 0,0,0 coordinates.
-7. Put on some proper dev texture (cube material or w.e)
-
+1. Follow the "Send to Unreal" steps:
+  * In unreal:
+    - Pugins -> "Enable Python Editor Script Plugin"
+    - Project Settings -> "Enable Remote Execution"
+    - "Default Shape Complexity" and select "Use Complex Collision as Simple". 
+  * In Blender (Pipeline -> Export -> Seting Dialog): 
+    - Set "Mesh Folder(Unreal)" to: /Game/Meshes/Dev (or anything you want)
+    - Export -> FXB Export Settings -> Smoothing: Face
+2. In Unreal drag the Meshes/Dev/SM_COLLECTION into your scene, and click the yellow little arrow in the transform panel, to reset it to 0,0,0 coordinates.
+3. Put on some proper dev texture, you can use 1 color per grouped collection.
 
 Done now you can:
 Go into Blender -> Change something -> Press SUT -> Instant Changes in Unreal Engine
 
-
 ![SUT](assets/addon.png)
-
-# Future Features
-1. Landscape Synchronization (Rough) (Landscape in unreal -> synchronize to blender and greybox back and forth)
-2. Instance Dupliactes in blender to world position in unreal (Make your scene in blender with a modular kit)