Added Scene.interact()

Author: eulertour

example_scenes/opengl.py

@@ -10,10 +10,10 @@
 
 class Test(Scene):
     def construct(self):
-        square = OpenGLSquare()
-        square.add_updater(lambda s: s.move_to(self.mouse_point))
-        self.add(square)
-        self.wait(60)
+        circle = OpenGLCircle()
+        self.play(circle.animate.shift(RIGHT))
+        circle.add_updater(lambda s: s.move_to(self.mouse_point))
+        self.interact()
 
 
 class InteractiveDevelopment(Scene):

manim/renderer/opengl_renderer.py

@@ -390,7 +390,6 @@ def update_frame():
         if self.window is not None:
             self.window.swap_buffers()
             while self.animation_elapsed_time < frame_offset:
-                # TODO: Just sleep?
                 update_frame()
                 self.window.swap_buffers()
 

manim/scene/scene.py

@@ -879,6 +879,16 @@ def play_internal(self, skip_rendering=False):
             self.update_mobjects(0)
         self.renderer.static_image = None
 
+    def interact(self):
+        self.quit_interaction = False
+        while not (self.renderer.window.is_closing or self.quit_interaction):
+            self.renderer.animation_start_time = 0
+            dt = 1 / config["frame_rate"]
+            self.renderer.render(self, dt, self.moving_mobjects)
+            self.update_mobjects(dt)
+        if self.renderer.window.is_closing:
+            self.renderer.window.destroy()
+
     def embed(self):
         if not config["preview"]:
             logger.warning("Called embed() while no preview window is available.")