Set SpriteCircle center coords during init

[chefPony]

It appears it is not possible to set the center coordinates of a SpriteCircle instance through its __init__ method. I would have expected to be able to pass center_x and center_y arguments as for its parent class.

[pushfoo]

Yep, I see what you mean. Here's an opinionated temp fix (full gist link + screenshot below):

import arcade

# Wrap the base class in a helper
class SpriteCircle(arcade.SpriteCircle):
    """Temp fix to make SpriteCircle behave more like SpriteSolidColor.

    See the following: https://github.com/pythonarcade/arcade/issues/2765
 
    Arguments:
        radius: The radius of the circle in pixels
        color: The color of the circle as an RGB or RGBA tuple
        soft:  If ``True``, the circle will fade from an opaque center to transparent edges
        center_x: Initial x position of the sprite
        center_y: Initial y position of the sprite
    """
    def __init__(
        self,
        radius: int,
        color: tuple[int, int, int, int] | tuple[int, int, int] = (255, 255, 255, 255),
        soft: bool = False,
        center_x: float = 0,
        center_y: float = 0
    ):
         # Optional: pass these as keywords for a little future-proofing
         super().__init__(radius=radius, color=color, soft=soft)
         self.position = center_x, center_y

Gist at https://gist.github.com/pushfoo/41629783cca419b70654631becd2dd8b

[pushfoo]

I've tagged this as a "good first issue" for anyone who'd like to take it. A more permanent fix would be:

1. Add the following keyword arguments to SpriteCircle.__init__ after the existing ones.:
   

   arcade/arcade/sprite/colored.py

   Line 147 in 7f4ae49

   def __init__(self, radius: int, color: RGBA255, soft: bool = False, **kwargs):

   • center_x: float = 0
   • center_y: float = 0
2. Pass them to super().__init__ here:
   

   arcade/arcade/sprite/colored.py

   Line 171 in 7f4ae49

   super().__init__(texture)

3. Add the arguments to the docstring:
   1. You can copy from SpriteSolidColor to save time:
      

      arcade/arcade/sprite/colored.py

      Lines 39 to 42 in 7f4ae49

      	center_x:
      	Initial x position of the sprite
      	center_y:
      	Initial y position of the sprite

   2. Add them after these lines:
      

      arcade/arcade/sprite/colored.py

      Lines 139 to 141 in 7f4ae49

      	soft:
      	If ``True``, the circle will fade from an opaque
      	center to transparent edges.

4. Add the behavior to the unit tests:
   1. Open up this file and look at these lines:
      

      arcade/tests/unit/sprite/test_sprite_colored.py

      Lines 8 to 12 in 7f4ae49

      	def test_sprite_circle_props():
      	"""Test basic properties of SpriteCircle"""
      	sprite = arcade.SpriteCircle(50, arcade.color.RED)
      	assert sprite.color == arcade.color.RED
      	assert sprite.size == (100, 100)

   2. Add the keyword arguments to the initialization:
      

      arcade/tests/unit/sprite/test_sprite_colored.py

      Line 10 in 7f4ae49

      sprite = arcade.SpriteCircle(50, arcade.color.RED)

      • center_x=5,
      • center_y=7
   3. Add an assert check for each property:
      • assert sprite.center_x == 5
      • assert sprite.center_y == 7