Stqrosta :
is there a function in Pygame that returns True whenever an object collides with a particular color?
I'm curious, because it'd be very useful in making something like Paint in Pygame.
sloth :
You can create a Mask from a Color, using pygame.mask.from_threshold, and use the standard pygame colision detection.
Here's an example where I create a Mask using yellow:
import pygame
import random
class Circle(pygame.sprite.Sprite):
def __init__(self, pos, color, *grps):
super().__init__(*grps)
self.image = pygame.Surface((32, 32))
self.image.set_colorkey((1, 2, 3))
self.image.fill((1, 2, 3))
pygame.draw.circle(self.image, pygame.Color(color), (15, 15), 15)
self.rect = self.image.get_rect(center=pos)
def main():
screen = pygame.display.set_mode((800, 600))
colors = ['green', 'yellow', 'white', 'blue']
sprites = pygame.sprite.Group()
objects = pygame.sprite.Group()
for _ in range(20):
pos = random.randint(100, 700), random.randint(100, 600)
Circle(pos, random.choice(colors), sprites, objects)
for sprite in objects:
sprite.mask = pygame.mask.from_threshold(sprite.image, pygame.Color('yellow'), (1, 1, 1, 255))
player = Circle(pygame.mouse.get_pos(), 'dodgerblue', sprites)
while True:
for e in pygame.event.get():
if e.type == pygame.QUIT:
return
player.rect.center = pygame.mouse.get_pos()
if pygame.sprite.spritecollideany(player, objects, pygame.sprite.collide_mask):
screen.fill((255, 255, 255))
else:
screen.fill((30, 30, 30))
sprites.update()
sprites.draw(screen)
pygame.display.flip()
main()
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