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import pygame
from random import randrange
from display import Scaling
from text import Fonts
class EnemySprite(pygame.sprite.Sprite):
def __init__(self):
super().__init__()
self.position = (0, 0)
self.movement = (0, 0)
def set_position(self, position: tuple):
self.position = position
self.update()
def set_movement(self, movement: tuple):
self.movement = movement
def update(self, dt = 0, **kwargs):
if dt:
self.position = (
self.position[0] + self.movement[0] * dt,
self.position[1] + self.movement[1] * dt)
self.rect = pygame.Rect(
Scaling.scale_to_display(self.position),
self.image.get_size())
def force_right(self):
self.movement = (abs(self.movement[0]), self.movement[1])
def force_left(self):
self.movement = (-abs(self.movement[0]), self.movement[1])
def force_down(self):
self.movement = (self.movement[0], abs(self.movement[1]))
def force_up(self):
self.movement = (self.movement[0], -abs(self.movement[1]))
class EnemyBall(EnemySprite):
def __init__(self):
super().__init__()
letter = Fonts.fonts['8x8'].get(randrange(1,3)).subsurface((0,0,8,8))
colored = letter.fill( "black", special_flags = pygame.BLEND_RGBA_MULT)
self.image = pygame.transform.scale_by(letter, 1_000 * Scaling.factor)
self.update()
class Enemies(pygame.sprite.Group):
def __init__(self, field = None, count = 0):
super().__init__()
for _ in range(count):
enemy = EnemyBall()
enemy.set_position( (randrange(0,300_000), randrange(0,200_000)) )
enemy.set_movement( (randrange(0,200)-100, randrange(0,200)-100) )
self.add(enemy)
self.field = field
def update(self, field_rects = [], **kwargs):
super().update(**kwargs)
""" Do actions on enemies that are only partly on the fields """
for enemy in self.sprites():
for field_rect in field_rects:
# if enemy is completely inside any field do next enemy
if field_rect.contains(enemy):
break
else:
# now find field that enemy is partly on
for field_rect in field_rects:
if field_rect.colliderect(enemy):
self.wall_hit(field_rect, enemy)
def wall_hit(self, field, enemy):
if enemy.rect.x < field.x:
enemy.force_right()
if enemy.rect.y < field.y:
enemy.force_down()
if ( enemy.rect.x + enemy.rect.w >= field.x + field.w ):
enemy.force_left()
if ( enemy.rect.y + enemy.rect.h >= field.y + field.h ):
enemy.force_up()
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