Add bouncing spot based on transform helper

effects/bouncingspot.py

@@ -1,12 +1,12 @@
 from typing import Any
 import pygame as pg
-from effects.effect import Effect, Colors
+from effects.effect import Effect, Colors, transform_bounce
 import random
 import math
 from typing import Union, Generator
 
 
-class BouncingSpot(Effect):
+class BouncingSpot2(Effect):
     def __init__(
         self,
         bounds: pg.Rect,
@@ -24,8 +24,6 @@ class BouncingSpot(Effect):
 
         self.velocity = random.randint(self.min_velocity, self.max_velocity)
         self.ticks = random.randint(0, 360)
-        self.x_factor = random.uniform(x_factor[0], x_factor[1])
-        self.y_factor = random.uniform(y_factor[0], y_factor[1])
         self.color = color
         size = (math.sin(self.ticks) / 2 + 0.5) * (
             self.max_size - self.min_size
@@ -44,6 +42,10 @@ class BouncingSpot(Effect):
             *groups
         )
         self.bounds = bounds
+        self.bouncer = transform_bounce(
+            bounds=bounds, velocity=velocity, x_factor=x_factor, y_factor=y_factor
+        )
+        next(self.bouncer)
         self.update()
 
     def update(self, *args: Any, **kwargs: Any) -> None:
@@ -53,14 +55,8 @@ class BouncingSpot(Effect):
 
         new_scale = new_size - self.rect.width
         self.rect.inflate_ip(new_scale, new_scale)
-        self.rect.centerx = (
-            0.4 * math.cos(self.x_factor * self.ticks) * self.bounds.width
-            + self.bounds.centerx
-        )
-        self.rect.centery = (
-            0.4 * math.sin(self.y_factor * self.ticks) * self.bounds.height
-            + self.bounds.centery
-        )
+
+        self.rect.center = self.bouncer.send(self.rect.size)
 
         self.image.fill(Colors.Black)
         pg.draw.ellipse(