Apply Groom Modifiers Extension

send2ue/resources/extensions/apply_groom_modifiers.py

@@ -0,0 +1,74 @@
+import bpy
+from send2ue.core import utilities
+from send2ue.constants import ToolInfo
+from send2ue.core.extension import ExtensionBase
+
+# Get or create temp collection (necessary?) 
+def get_temp_collection(collection_name="GroomTempCollection"):
+    if collection_name in bpy.data.collections:
+        temp_collection = bpy.data.collections[collection_name]
+    else:
+        temp_collection = bpy.data.collections.new(name=collection_name)
+        bpy.context.scene.collection.children.link(temp_collection)
+
+    return temp_collection
+
+# make copies of original objects, link to temp collection
+def apply_groom_modifiers():
+    properties = bpy.context.scene.send2ue
+    hair_objects = utilities.get_hair_objects(properties)
+    temp_collection = get_temp_collection()
+
+    for hair_object in hair_objects:
+        hair_copy = hair_object.copy()
+        hair_copy.data = hair_object.data.copy()
+        temp_collection.objects.link(hair_copy)
+
+        for modifier in hair_object.modifiers:
+            bpy.context.view_layer.objects.active = hair_object
+            print(modifier.name)
+            if modifier.name != 'Surface Deform':
+                bpy.ops.object.modifier_apply(modifier=modifier.name)
+
+# Delete modified objects and restore original copies
+def restore_groom_modifiers():
+    temp_collection = get_temp_collection()
+    export_collection = bpy.data.collections.get(ToolInfo.EXPORT_COLLECTION.value)
+    hair_copies = temp_collection.all_objects
+
+    for hair_copy in hair_copies:
+        original_name = hair_copy.name.split(".")[0]
+        modified_hair_object = bpy.data.objects.get(original_name)
+        if modified_hair_object:
+            bpy.data.objects.remove(modified_hair_object, do_unlink=True)
+            export_collection.objects.link(hair_copy)
+            temp_collection.objects.unlink(hair_copy)
+            hair_copy.name = original_name
+
+    bpy.data.collections.remove(temp_collection)
+
+class ApplyGroomModifiersExtension(ExtensionBase):
+    name = 'applygroommodifiers'
+
+    apply_groom_mods: bpy.props.BoolProperty(
+        name= "Apply Groom Mods",
+        default= False,
+        description="Automatically applies hair modifiers for export "
+                    "Modifiers restored after export finishes."
+    )
+
+    # Draws setting in extensions panel.
+    def draw_export(self, dialog, layout, properties):
+        box = layout.box()
+        box.label(text='Groom Modifiers:')
+        dialog.draw_property(self, box, 'apply_groom_mods')
+
+    def pre_operation(self, properties):
+        if self.apply_groom_mods:
+            print('groommods enabled')
+            apply_groom_modifiers()
+
+    def post_operation(self, properties):
+        if self.apply_groom_mods:
+            print('groommods post')
+            restore_groom_modifiers()

send2ue/resources/setting_templates/default.json

@@ -66,6 +66,9 @@
   "export_custom_property_fcurves": true,
   "export_object_name_as_root": true,
   "extensions": {
+    "applygroommodifiers": {
+      "apply_groom_mods": true
+    },
     "affixes": {
       "animation_sequence_name_affix": "Anim_",
       "auto_add_asset_name_affixes": false,

tests/test_files/send2ue_templates/default.json

@@ -66,6 +66,9 @@
   "export_custom_property_fcurves": true,
   "export_object_name_as_root": true,
   "extensions": {
+    "applygroommodifiers": {
+      "apply_groom_mods": true
+    },
     "affixes": {
       "animation_sequence_name_affix": "Anim_",
       "auto_add_asset_name_affixes": false,

tests/test_files/send2ue_templates/template_1.json

@@ -66,6 +66,9 @@
   "export_custom_property_fcurves": true,
   "export_object_name_as_root": true,
   "extensions": {
+    "applygroommodifiers": {
+      "apply_groom_mods": true
+    },
     "affixes": {
       "animation_sequence_name_affix": "Anim_",
       "auto_add_asset_name_affixes": false,