#1479 Fix for error during camera shake example. (#1485)

Co-authored-by: Paul V Craven <[email protected]>

Author: pvcraven

arcade/camera.py

@@ -145,7 +145,8 @@ def shake(self, velocity: Vec2, speed: float = 1.5, damping: float = 0.9):
         """
         Add a camera shake.
 
-        :param Vec2 velocity: Vector to start moving the camera
+        :param Vec2 velocity: Vector to start moving the camera. Needs to be
+                              a pyglet.math.Vec2.
         :param float speed: How fast to shake
         :param float damping: How fast to stop shaking
         """

arcade/examples/sprite_move_scrolling_shake.py

@@ -10,6 +10,7 @@
 import random
 import math
 import arcade
+from pyglet.math import Vec2
 
 SPRITE_SCALING = 0.5
 
@@ -157,7 +158,7 @@ def on_update(self, delta_time):
             # How 'far' to shake
             shake_amplitude = 10
             # Calculate a vector based on that
-            shake_vector = (
+            shake_vector = Vec2(
                 math.cos(shake_direction) * shake_amplitude,
                 math.sin(shake_direction) * shake_amplitude
             )
@@ -179,7 +180,7 @@ def scroll_to_player(self):
         pan.
         """
 
-        position = (
+        position = Vec2(
             self.player_sprite.center_x - self.width / 2,
             self.player_sprite.center_y - self.height / 2
         )