Fix T42586: Error when attempting to export FBX (non-invertible matrix).

Just use 'new' inverted_safe() everywhere we are not 100% sure the matrix is invertible...

io_scene_fbx/export_fbx_bin.py

@@ -1452,7 +1452,7 @@ def fbx_data_armature_elements(root, arm_obj, scene_data):
                 #          http://area.autodesk.com/forum/autodesk-fbx/fbx-sdk/why-the-values-return-
                 #                 by-fbxcluster-gettransformmatrix-x-not-same-with-the-value-in-ascii-fbx-file/
                 elem_data_single_float64_array(fbx_clstr, b"Transform",
-                                               matrix4_to_array(mat_world_bones[bo_obj].inverted() * mat_world_obj))
+                                               matrix4_to_array(mat_world_bones[bo_obj].inverted_safe() * mat_world_obj))
                 elem_data_single_float64_array(fbx_clstr, b"TransformLink", matrix4_to_array(mat_world_bones[bo_obj]))
                 elem_data_single_float64_array(fbx_clstr, b"TransformAssociateModel", matrix4_to_array(mat_world_arm))
 

io_scene_fbx/fbx_utils.py

@@ -902,11 +902,11 @@ class ObjectWrapper(metaclass=MetaObjectWrapper):
         if self._tag == 'OB':
             return self.bdata.matrix_local.copy()
         elif self._tag == 'DP':
-            return self._ref.matrix_world.inverted() * self._dupli_matrix
+            return self._ref.matrix_world.inverted_safe() * self._dupli_matrix
         else:  # 'BO', current pose
             # PoseBone.matrix is in armature space, bring in back in real local one!
             par = self.bdata.parent
-            par_mat_inv = self._ref.pose.bones[par.name].matrix.inverted() if par else Matrix()
+            par_mat_inv = self._ref.pose.bones[par.name].matrix.inverted_safe() if par else Matrix()
             return par_mat_inv * self._ref.pose.bones[self.bdata.name].matrix
     matrix_local = property(get_matrix_local)
 
@@ -923,7 +923,7 @@ class ObjectWrapper(metaclass=MetaObjectWrapper):
         if self._tag == 'BO':
             # Bone.matrix_local is in armature space, bring in back in real local one!
             par = self.bdata.parent
-            par_mat_inv = par.matrix_local.inverted() if par else Matrix()
+            par_mat_inv = par.matrix_local.inverted_safe() if par else Matrix()
             return par_mat_inv * self.bdata.matrix_local
         else:
             return self.matrix_local
@@ -1012,7 +1012,7 @@ class ObjectWrapper(metaclass=MetaObjectWrapper):
                 matrix = (parent.matrix_rest_local if rest else parent.matrix_local) * matrix
                 # ...and move it back into parent's *FBX* local space.
                 par_mat = parent.fbx_object_matrix(scene_data, rest=rest, local_space=True)
-                matrix = par_mat.inverted() * matrix
+                matrix = par_mat.inverted_safe() * matrix
 
         if self.use_bake_space_transform(scene_data):
             # If we bake the transforms we need to post-multiply inverse global transform.

io_scene_fbx/import_fbx.py

@@ -360,11 +360,11 @@ def blen_read_object_transform_do(transform_data):
         pre_rot *
         lcl_rot *
         pst_rot *
-        rot_piv.inverted() *
+        rot_piv.inverted_safe() *
         sca_ofs *
         sca_piv *
         lcl_scale *
-        sca_piv.inverted()
+        sca_piv.inverted_safe()
     )
 
 
@@ -537,7 +537,7 @@ def blen_read_animations_action_item(action, item, cnodes, fps):
         rot_prev = bl_obj.rotation_euler.copy()
 
         # Pre-compute inverted local rest matrix of the bone, if relevant.
-        restmat_inv = item.get_bind_matrix().inverted() if item.is_bone else None
+        restmat_inv = item.get_bind_matrix().inverted_safe() if item.is_bone else None
 
         # We assume for now blen init point is frame 1.0, while FBX ktime init point is 0.
         for frame, values in blen_read_animations_curves_iter(fbx_curves, 1.0, 0, fps):
@@ -1424,7 +1424,7 @@ class FbxImportHelperNode:
             self.post_matrix = settings.global_matrix_inv * (self.post_matrix if self.post_matrix else Matrix())
 
         # process children
-        correction_matrix_inv = correction_matrix.inverted() if correction_matrix else None
+        correction_matrix_inv = correction_matrix.inverted_safe() if correction_matrix else None
         for child in self.children:
             child.find_correction_matrix(settings, correction_matrix_inv)
 
@@ -1522,7 +1522,7 @@ class FbxImportHelperNode:
             parent_matrix = Matrix()
 
         if self.bind_matrix:
-            bind_matrix = parent_matrix.inverted() * self.bind_matrix
+            bind_matrix = parent_matrix.inverted_safe() * self.bind_matrix
         else:
             bind_matrix = self.matrix.copy() if self.matrix else None
 
@@ -1541,7 +1541,7 @@ class FbxImportHelperNode:
 
     def collect_armature_meshes(self):
         if self.is_armature:
-            armature_matrix_inv = self.get_world_matrix().inverted()
+            armature_matrix_inv = self.get_world_matrix().inverted_safe()
 
             meshes = set()
             for child in self.children:
@@ -1549,7 +1549,7 @@ class FbxImportHelperNode:
             for m in meshes:
                 old_matrix = m.matrix
                 m.matrix = armature_matrix_inv * m.get_world_matrix()
-                m.anim_compensation_matrix = old_matrix.inverted() * m.matrix
+                m.anim_compensation_matrix = old_matrix.inverted_safe() * m.matrix
                 m.parent = self
             self.meshes = meshes
         else:
@@ -1666,7 +1666,7 @@ class FbxImportHelperNode:
 
     def set_pose_matrix(self, arm):
         pose_bone = arm.bl_obj.pose.bones[self.bl_bone]
-        pose_bone.matrix_basis = self.get_bind_matrix().inverted() * self.get_matrix()
+        pose_bone.matrix_basis = self.get_bind_matrix().inverted_safe() * self.get_matrix()
 
         for child in self.children:
             if child.ignore: