Temporarily moved penetration depth from collision modifier permeability to niftools collision property to fix error caused by changes in Blender 3.0 and later.

Author: Candoran2

io_scene_niftools/modules/nif_export/collision/havok.py

@@ -173,7 +173,7 @@ def export_bhk_rigid_body(self, b_obj, n_col_obj):
         n_r_body.restitution = b_r_body.restitution
         n_r_body.max_linear_velocity = b_obj.nifcollision.max_linear_velocity
         n_r_body.max_angular_velocity = b_obj.nifcollision.max_angular_velocity
-        n_r_body.penetration_depth = b_obj.collision.permeability
+        n_r_body.penetration_depth = b_obj.nifcollision.penetration_depth
         n_r_body.motion_system = b_obj.nifcollision.motion_system
         n_r_body.deactivator_type = b_obj.nifcollision.deactivator_type
         n_r_body.solver_deactivation = b_obj.nifcollision.solver_deactivation

io_scene_niftools/modules/nif_import/collision/havok.py

@@ -197,7 +197,7 @@ def _import_bhk_rigid_body(self, bhkshape, collision_objs):
             b_r_body.deactivate_angular_velocity = mathutils.Vector([ang_vel.w, ang_vel.x, ang_vel.y, ang_vel.z]).magnitude
 
             # Custom Niftools properties
-            b_col_obj.collision.permeability = bhkshape.penetration_depth
+            b_col_obj.nifcollision.penetration_depth = bhkshape.penetration_depth
             b_col_obj.nifcollision.deactivator_type = NifFormat.DeactivatorType._enumkeys[bhkshape.deactivator_type]
             b_col_obj.nifcollision.solver_deactivation = NifFormat.SolverDeactivation._enumkeys[bhkshape.solver_deactivation]
             b_col_obj.nifcollision.max_linear_velocity = bhkshape.max_linear_velocity

io_scene_niftools/properties/collision.py

@@ -82,6 +82,12 @@ class CollisionProperty(PropertyGroup):
         items=game_specific_col_layer_items,
     )
 
+    penetration_depth: FloatProperty(
+        name='Penetration Depth',
+        description='The maximum allowed penetration for this object.',
+        default=0.15
+    )
+
     deactivator_type: EnumProperty(
         name='Deactivator Type',
         description='Motion deactivation setting',