fix - handle float64 checksums from files saved in previous Blender versions

Files saved in previous Blender versions stored position checksums as float64
(24 bytes for location, 72 bytes for rotation), but the current code only
expected float32 format. This caused a shape mismatch error (6,) vs (3,) when
comparing checksums during save operations.

Added byte size detection in is_moved() methods to automatically handle both
old float64 and new float32 checksum formats, ensuring backward compatibility
with files from previous versions.

Fixes ValueError when saving IFC files loaded from older Blender versions.

src/bonsai/bonsai/bim/module/drawing/decoration.py

@@ -1739,13 +1739,27 @@ class CutDecorator:
             self.cache_camera_matrix()
             return True  # Let's be conservative
         obj = bpy.context.scene.camera
-        loc_check = np.frombuffer(eval(DecoratorData.camera_location_checksum), dtype=np.float32)
-        loc_real = np.array(obj.matrix_world.translation).flatten()
+
+        # Handle both old float64 and new float32 checksums for version compatibility
+        loc_checksum_bytes = eval(DecoratorData.camera_location_checksum)
+        if len(loc_checksum_bytes) == 24:  # Old format: 3 * 8 bytes (float64)
+            loc_check = np.frombuffer(loc_checksum_bytes, dtype=np.float64).astype(np.float32)
+        else:  # New format: 3 * 4 bytes (float32)
+            loc_check = np.frombuffer(loc_checksum_bytes, dtype=np.float32)
+
+        loc_real = np.array(obj.matrix_world.translation, dtype=np.float32).flatten()
         if not np.allclose(loc_check, loc_real, atol=1e-4):  # 0.1 mm
             self.cache_camera_matrix()
             return True
-        rot_check = np.frombuffer(eval(DecoratorData.camera_rotation_checksum), dtype=np.float32).reshape(3, 3)
-        rot_real = np.array(obj.matrix_world.to_3x3())
+
+        # Handle both old float64 and new float32 checksums for version compatibility
+        rot_checksum_bytes = eval(DecoratorData.camera_rotation_checksum)
+        if len(rot_checksum_bytes) == 72:  # Old format: 9 * 8 bytes (float64)
+            rot_check = np.frombuffer(rot_checksum_bytes, dtype=np.float64).astype(np.float32).reshape(3, 3)
+        else:  # New format: 9 * 4 bytes (float32)
+            rot_check = np.frombuffer(rot_checksum_bytes, dtype=np.float32).reshape(3, 3)
+
+        rot_real = np.array(obj.matrix_world.to_3x3(), dtype=np.float32)
         rot_dot = np.dot(rot_check, rot_real.T)
         angle_rad = np.arccos(np.clip((np.trace(rot_dot) - 1) / 2, -1, 1))
         if angle_rad > 0.0017453292519943296:  # 0.1 degrees

src/bonsai/bonsai/tool/ifc.py

@@ -110,12 +110,26 @@ class Ifc(bonsai.core.tool.Ifc):
         oprops = tool.Blender.get_object_bim_props(obj)
         if not oprops.location_checksum:
             return True  # Let's be conservative
-        loc_check = np.frombuffer(eval(oprops.location_checksum), dtype=np.float32)
-        loc_real = np.array(obj.matrix_world.translation).flatten()
+
+        # Handle both old float64 and new float32 checksums for version compatibility
+        loc_checksum_bytes = eval(oprops.location_checksum)
+        if len(loc_checksum_bytes) == 24:  # Old format: 3 * 8 bytes (float64)
+            loc_check = np.frombuffer(loc_checksum_bytes, dtype=np.float64).astype(np.float32)
+        else:  # New format: 3 * 4 bytes (float32)
+            loc_check = np.frombuffer(loc_checksum_bytes, dtype=np.float32)
+
+        loc_real = np.array(obj.matrix_world.translation, dtype=np.float32).flatten()
         if not np.allclose(loc_check, loc_real, atol=1e-4):  # 0.1 mm
             return True
-        rot_check = np.frombuffer(eval(oprops.rotation_checksum), dtype=np.float32).reshape(3, 3)
-        rot_real = np.array(obj.matrix_world.to_3x3())
+
+        # Handle both old float64 and new float32 checksums for version compatibility
+        rot_checksum_bytes = eval(oprops.rotation_checksum)
+        if len(rot_checksum_bytes) == 72:  # Old format: 9 * 8 bytes (float64)
+            rot_check = np.frombuffer(rot_checksum_bytes, dtype=np.float64).astype(np.float32).reshape(3, 3)
+        else:  # New format: 9 * 4 bytes (float32)
+            rot_check = np.frombuffer(rot_checksum_bytes, dtype=np.float32).reshape(3, 3)
+
+        rot_real = np.array(obj.matrix_world.to_3x3(), dtype=np.float32)
         rot_dot = np.dot(rot_check, rot_real.T)
         angle_rad = np.arccos(np.clip((np.trace(rot_dot) - 1) / 2, -1, 1))
         if angle_rad > 0.0017453292519943296:  # 0.1 degrees