Module 7 - Section 1 - Classes

This example code could be used in Python/Pygame to draw a ball. Having all the parameters contained in a class makes data management easier.

class Ball(): def __init__(self): # --- Class Attributes --- # Ball position self.x = 0 self.y = 0 # Ball's vector self.change_x = 0 self.change_y = 0 # Ball size self.size = 10 # Ball color self.color = [255,255,255] # --- Class Methods --- def move(self): self.x += self.change_x self.y += self.change_y def draw(self, screen): pygame.draw.circle(screen, self.color, [self.x, self.y], self.size )

Below is the code that would go ahead of the main program loop to create a ball and set its attributes:
theBall = Ball() theBall.x = 100 theBall.y = 100 theBall.change_x = 2 theBall.change_y = 1 theBall.color = [255,0,0]

This code would go inside the main loop to move and draw the ball:

theBall.move() theBall.draw(screen)

The complete code can be downloaded from here