changed camera angle

zkmarek/video/slides/short1/short.py

@@ -19,6 +19,7 @@
     VGroup,
     FadeTransform,
     MoveAlongPath,
+    ChangeSpeed,
 )
 
 import numpy as np
@@ -155,20 +156,15 @@ def animate_in(self, scene):
             chaotic_points.append([x, y, z])
         chaotic_path.set_points_as_corners(chaotic_points)
 
-        def custom_rate_func(t):
-            if t < 0.2:
-                return t * 0.5
-            elif t < 0.4:
-                return 0.1 + (t - 0.2) * 1.2
-            elif t < 0.6:
-                return 0.6 + (t - 0.4) * 0.8
-            elif t < 0.8:
-                return 0.7 + (t - 0.6) * 0.5
-            else:
-                return 1.0 - (t - 0.8) * 0.05
+        speeds = [1, 0.8, 0.7, 0.5, 0.8, 0.6, 0.3, 0.25, 0.1, 0.11, 0.05]
+
+        def speed_func(t):
+            return speeds[int(t * (len(speeds) - 1))]
 
         scene.play(
-            MoveAlongPath(dot, chaotic_path, run_time=5, rate_func=custom_rate_func)
+            ChangeSpeed(
+                MoveAlongPath(dot, chaotic_path, run_time=5), speed_func=speed_func
+            )
         )
 
         dot1 = Text("?", font_size=35, font=PRIMARY_FONT, color=PRIMARY_COLOR)
@@ -212,7 +208,9 @@ def custom_rate_func(t):
                 ).next_to(dot, RIGHT)
                 label.rotate(
                     scene.camera.get_phi() + 60 * DEGREES, axis=[1, 0, 0]
-                ).rotate(scene.camera.get_phi(), axis=[0, 0, 1])
+                ).rotate(scene.camera.get_phi(), axis=[0, 0, 1]).rotate(
+                    angle=180 * DEGREES, axis=[1, 0, 0]
+                )
                 scene.add(dot, label)
 
         self.new_subsection(scene, "south pole", "data/sound/short1/slide2-3.mp3")