def __init__(self, state, xy: (int, int), bearing: float, color, brain=None):
"""
Creates a germ given the canvas on which to create it, the coordinates, color, and initial velocity.
state - the world state.
xy - coordinates; location of the germ. To prevent sticking, must be between 0 and bounding area, _exclusively_.
color - a tkinter-viable color (can be hex)
"""
# The tag in tkinter representing all parts of this germ. Appended "str" to the front b/c tags don't work if they don't contain letters for some reason.
self.tag = "str" + str(id(self))
# 'Adopts' the canvas, and then creates itself on the canvas with the color given.
# Then moves itself to the given xy coordinate.
self.state = state
self.canvas = state.canvas
self.brain = Brain.from_random() if not brain else brain
self.bearing = bearing
self.body = self.canvas.create_oval(0, 0, 11, 11, fill=color, tags="germ")
self.canvas.move(self.body, *xy)
self.color = color # Saving this mostly just for debugging purposes.
