Show both lines and sidebar for EC addition

zkmarek/video/slides/ec/addition.py

@@ -27,10 +27,11 @@ def animate_in(self, scene):
         scene.add(self.chart)
         AnimateAddition.play(scene, self.chart, 5, 1, 10, 0)
         self.new_subsection(scene, "Overflow the field")
-        AnimateAddition.play(scene, self.chart, 5, 1, 9, 1)
+        anim = AnimateAddition.play(scene, self.chart, 5, 1, 9, 1, animate_out=False)
         self.new_subsection(scene, "Sidebar")
         self.chart.animate_align_left(scene)
         self.sidebar.animate_in(scene, self)
+        anim.animate_out(scene)
 
     def animate_out(self, scene):
         self.sidebar.animate_out(scene)

zkmarek/video/slides/ec/animate_addition.py

@@ -46,10 +46,16 @@ def animate_in(self, scene: Scene, c0: ECAffine, c1: ECAffine):
         self.line2 = Line(p[2], p[3], color=DARK_GREY)
         scene.play(GrowFromPoint(self.line2, point=p[2], run_time=5))
         scene.play(FadeIn(self.labels[3]))
+        self.chart.add(*self.lines)
+        self.chart.add(self.line2)
+        self.chart.add(*self.labels)
 
     def animate_out(self, scene):
         scene.play(FadeOut(*self.labels))
         scene.play(FadeOut(self.line2), FadeOut(*self.lines))
+        self.chart.remove(*self.lines)
+        self.chart.remove(self.line2)
+        self.chart.remove(*self.labels)
 
     @staticmethod
     def play(
@@ -59,9 +65,12 @@ def play(
         a1_odd: int,
         a2_x: int,
         a2_odd: int,
+        animate_out: bool = True,
     ):
         a1 = chart.find_affine_by_x(a1_x, a1_odd)
         a2 = chart.find_affine_by_x(a2_x, a2_odd)
         anim = AnimateAddition(chart)
         anim.animate_in(scene, a1, a2)
-        anim.animate_out(scene)
+        if animate_out:
+            anim.animate_out(scene)
+        return anim