Make sure skip_animations and start_at_animation_number play well together

manimlib/config.py

@@ -302,9 +302,10 @@ def get_configuration(args):
         "file_writer_config": file_writer_config,
         "quiet": args.quiet or args.write_all,
         "write_all": args.write_all,
+        "skip_animations": args.skip_animations,
         "start_at_animation_number": args.start_at_animation_number,
-        "preview": not write_file,
         "end_at_animation_number": None,
+        "preview": not write_file,
         "leave_progress_bars": args.leave_progress_bars,
     }
 
@@ -334,10 +335,6 @@ def get_configuration(args):
         else:
             config["start_at_animation_number"] = int(stan)
 
-    config["skip_animations"] = any([
-        args.skip_animations,
-        args.start_at_animation_number,
-    ])
     return config
 
 

manimlib/scene/scene.py

@@ -56,6 +56,8 @@ class Scene(object):
         self.time = 0
         self.skip_time = 0
         self.original_skipping_status = self.skip_animations
+        if self.start_at_animation_number is not None:
+            self.skip_animations = True
 
         # Items associated with interaction
         self.mouse_point = Point()
@@ -277,9 +279,8 @@ class Scene(object):
                 raise EndSceneEarlyException()
 
     def stop_skipping(self):
-        if self.skip_animations:
-            self.skip_animations = False
-            self.skip_time += self.time
+        self.virtual_animation_start_time = self.time
+        self.skip_animations = False
 
     # Methods associated with running animations
     def get_time_progression(self, run_time, n_iterations=None, desc="", override_skip_animations=False):