Develop Reference

How do my make my image (rect) collide with my randomly generated circles to end the game? [duplicate]

This question already has answers here:
How do I detect collision in pygame?
(5 answers)
Closed 1 year ago.
I have been trying to solve this for weeks. This is a free-falling pit game, where my character (in this case a chimpanzee png) falls from the top of the screen to the bottom while trying to dodge the random black circles. I have tried so many angles at tackling this, I have tried the standard collision I was taught (pygame.sprite.groupcollide(Group1, Group2, False, True, collided = None) I have tried doing collisions with the colour black only, different formats of spawning my image and all that, and I haven't been able to find anything that works with my code. It has resulted in the code being very messy. I have tried to clean it up for this, but it still might be hard to understand, but if anybody has any solution to this, please let me know as I have been stumped for weeks. I just want the game to close or "game over" when they touch a circle Code:
import sys
import pygame as pg
RED = (255, 0, 0)
GRAY = (150, 150, 150)
GREEN =(34, 177, 76)
BLACK = (0,0,0)
import random
import math
def main():
width, height = 1024, 768
hbox, vbox = 80, 80
w, h = 640, 240
screen = pg.display.set_mode((width, height))
BG = pg.image.load('jungle.jpg').convert()
img = pg.image.load('MONKEY.png')
img = pg.transform.scale(img, (80, 80))
img.convert()
rect = img.get_rect()
rect.center = w//2, h//2
clock = pg.time.Clock()
Score = 0
class Circle(pg.sprite.Sprite):
def __init__(self):
#You can initialise the size to a random value
self.pos = [random.randint(0, 1000), random.randint(180, 600)]
self.color = (0,0, 0)
self.radius = 20
def draw(self):
pg.draw.circle(screen, self.color, (self.pos[0], self.pos[1]), self.radius)
circles = []
for i in range(20):
circles.append(Circle())
def checkIntersection(c1, c2):
dx = c1.pos[0] - c2.pos[0]
dy = c1.pos[1] - c2.pos[1]
d = math.hypot(dx, dy)
if d < c1.radius + c2.radius:
return True
return False
for i in range(19):
while checkIntersection(circles[i], circles[i + 1]):
circles[i].pos = random.randint(0, 1000), random.randint(0, 700)
velocity = (0, 0)
done = False
while not done:
for event in pg.event.get():
if event.type == pg.QUIT:
done = True
keys = pg.key.get_pressed()
# booster
move = 8 if keys[pg.K_LSHIFT] else 4
if keys[pg.K_a]: #to move left
rect.x -= move
if rect.x < 0 : rect.x = 0
if keys[pg.K_d]: #to move right
rect.x += move
if rect.x > width-hbox : rect.x = width - hbox
Score += 1
rect.y += 2.5
screen.blit(BG, (0,0))
screen.blit(img,rect)
pg.draw.rect(screen, RED, rect, 1)
pg.draw.polygon(screen, GREEN, ((1024,768), (0,768), (0,640),(1024,640)))
font = pg.font.SysFont("comicsansms", 45)
text = font.render (" " + str(Score), 1, BLACK)
screen.blit(text,(480,700))
pg.event.get()
for circle in circles:
circle.draw()
pg.display.update()
clock.tick(30)
if __name__ == '__main__':
pg.init()
main()
pg.quit()
sys.exit()

Use a "mask" collision. See How can I made a collision mask? and Pygame mask collision
Create a Sprite class with mask (see pygame.mask.from_surface):
class Circle(pg.sprite.Sprite):
def __init__(self):
super().__init__()
self.pos = [random.randint(0, 1000), random.randint(180, 600)]
self.color = (0,0, 0)
self.radius = 20
self.image = pg.Surface((self.radius*2, self.radius*2), pg.SRCALPHA)
pg.draw.circle(self.image , self.color, (self.radius, self.radius), self.radius)
self.rect = self.image.get_rect(center = self.pos)
self.mask = pg.mask.from_surface(self.image)
Create a Sprite class for the player (also with a mask)
class Player(pg.sprite.Sprite):
def __init__(self, x, y):
super().__init__()
self.image = pg.image.load('MONKEY.png')
self.image = pg.transform.scale(self.image, (80, 80)).convert()
self.rect = self.image.get_rect()
self.rect.center = x, y
self.mask = pg.mask.from_surface(self.image)
Manage the Sprites in pygame.sprite.Group and use pygame.sprite.spritecollide and pygame.sprite.collide_mask() for the collision test:
if pg.sprite.spritecollide(player, circles, False, collided = pg.sprite.collide_mask):
done = True
Complete example:
import sys
import pygame as pg
RED = (255, 0, 0)
GRAY = (150, 150, 150)
GREEN =(34, 177, 76)
BLACK = (0,0,0)
import random
import math
class Circle(pg.sprite.Sprite):
def __init__(self):
super().__init__()
self.pos = [random.randint(0, 1000), random.randint(180, 600)]
self.color = (0,0, 0)
self.radius = 20
self.image = pg.Surface((self.radius*2, self.radius*2), pg.SRCALPHA)
pg.draw.circle(self.image , self.color, (self.radius, self.radius), self.radius)
self.rect = self.image.get_rect(center = self.pos)
self.mask = pg.mask.from_surface(self.image)
class Player(pg.sprite.Sprite):
def __init__(self, x, y):
super().__init__()
self.image = pg.image.load('MONKEY.png')
self.image = pg.transform.scale(self.image, (80, 80)).convert()
self.rect = self.image.get_rect()
self.rect.center = x, y
self.mask = pg.mask.from_surface(self.image)
def main():
width, height = 1024, 768
hbox, vbox = 80, 80
w, h = 640, 240
screen = pg.display.set_mode((width, height))
BG = pg.image.load('jungle.jpg').convert()
clock = pg.time.Clock()
Score = 0
player = Player(w//2, h//2)
all_sprites = pg.sprite.Group(player)
circles = pg.sprite.Group()
for i in range(20):
circle = Circle()
circles.add(circle)
all_sprites.add(circle)
def checkIntersection(c1, c2):
dx = c1.pos[0] - c2.pos[0]
dy = c1.pos[1] - c2.pos[1]
d = math.hypot(dx, dy)
if d < c1.radius + c2.radius:
return True
return False
c = circles.sprites()
for i in range(19):
while checkIntersection(c[i], c[i + 1]):
c[i].pos = random.randint(0, 1000), random.randint(0, 700)
velocity = (0, 0)
done = False
while not done:
for event in pg.event.get():
if event.type == pg.QUIT:
done = True
keys = pg.key.get_pressed()
# booster
move = 8 if keys[pg.K_LSHIFT] else 4
if keys[pg.K_a]: #to move left
player.rect.x -= move
if player.rect.x < 0 : player.rect.x = 0
if keys[pg.K_d]: #to move right
player.rect.x += move
if player.rect.x > width-hbox : player.rect.x = width - hbox
Score += 1
player.rect.y += 2.5
screen.blit(BG, (0,0))
pg.draw.rect(screen, RED, player.rect, 1)
pg.draw.polygon(screen, GREEN, ((1024,768), (0,768), (0,640),(1024,640)))
font = pg.font.SysFont("comicsansms", 45)
text = font.render (" " + str(Score), 1, BLACK)
screen.blit(text,(480,700))
pg.event.get()
all_sprites.draw(screen)
pg.display.update()
clock.tick(30)
if pg.sprite.spritecollide(player, circles, False, collided = pg.sprite.collide_mask):
done = True
if __name__ == '__main__':
pg.init()
main()
pg.quit()
sys.exit()

PyGame Snake decreases speed as window size increases

I've been struggling with this problem for a couple days now. I want to eventually convert my snake game script to an exe, for my friends to play. I want the snake to move at the same speed, no matter the size of the window.
For Example: My window size right now is (400, 400). If I increase the size to (800, 800), the snake will move slower. However, the snake velocity is constant at 20 pixels. It almost seems like my main game loop is looping at a slower pace as the window size increases.
I know that the snake has more pixels to traverse with a bigger window size, but how does that affect the snake velocity at all? I'm thinking the solution lies somewhere in the speed at which I'm drawing the snake to the screen, but can't be sure.
import pygame
import sys
import random
import math
import time
pygame.display.set_caption('Snake')
pygame.font.init()
game_running = True
width = 400
height = 400
size = (width, height)
window = pygame.display.set_mode(size) # our surface type
pygame.display.set_caption("Snake Game by Nick Rinaldi")
class Food:
def __init__(self, block_size, surface, x_loc, y_loc): # pass in color and random_x/random_y. block size is a constant
self.block_size = block_size
self.surface = surface # green
self.x_loc = x_loc
self.y_loc = y_loc
self.mask = pygame.mask.from_surface(self.surface)
def draw(self, window):
window.blit(self.surface, (self.x_loc, self.y_loc))
class Snake:
def __init__(self, block_size, surface, x_loc, y_loc):
self.block_size = block_size
self.surface = surface # red
self.x_loc = x_loc
self.y_loc = y_loc
self.body = []
self.direction = None
self.velocity = 20
self.mask = pygame.mask.from_surface(self.surface)
def draw(self, color, window, block_size):
self.seg = []
self.head = pygame.Rect(self.x_loc, self.y_loc, block_size, block_size)
pygame.draw.rect(window, color, self.head)
if len(self.body) > 0:
for unit in self.body:
segment = pygame.Rect(unit[0], unit[1], block_size, block_size)
pygame.draw.rect(window, color, segment)
self.seg.append(segment)
def add_unit(self):
if len(self.body) != 0:
index = len(self.body) - 1
x = self.body[index][0]
y = self.body[index][1]
self.body.append([x, y])
else:
self.body.append([1000, 1000])
def move(self, step):
for index in range(len(self.body) -1, 0, -1):
x = self.body[index-1][0]
y = self.body[index-1][1]
self.body[index] = [x, y]
if len(self.body) > 0:
self.body[0] = [self.x_loc, self.y_loc]
if self.direction == "right": # if specific constant, keep moving in direction
self.x_loc += self.velocity * step
if self.direction == "left":
self.x_loc -= self.velocity * step
if self.direction == "down":
self.y_loc += self.velocity * step
if self.direction == "up":
self.y_loc -= self.velocity * step
def collision(self, obj):
return collide(food)
def gameOver(snake):
white = pygame.Color(255, 255, 255)
display = True
while display:
window.fill(white)
score_font = pygame.font.SysFont("Courier New", 16)
score_label = score_font.render("Your score was: " + str(len(snake.body) + 1), 1, (0, 0, 0))
replay_label = score_font.render("To replay, click the mouse button", 1, (0, 0, 0))
window.blit(score_label, (50, 100))
window.blit(replay_label, (50, 130))
pygame.display.update()
for event in pygame.event.get(): # if we hit "x" to close out the game, close out the game.
if event.type == pygame.QUIT:
pygame.quit()
exit()
if event.type == pygame.MOUSEBUTTONDOWN:
main()
pygame.quit()
sys.exit()
clock = pygame.time.Clock()
def main():
game_over = False
x = 20 # x position
y = 20 # y position
block_snakes = []
pygame.init()
clock = pygame.time.Clock()
red = pygame.Color(255, 0, 0)
green = pygame.Color(0, 255, 0)
white = pygame.Color(255, 255, 255)
black = pygame.Color(0, 0, 0)
block_size = 20
randx_green = random.randrange(0, width, 20)
randy_green = random.randrange(0, height, 20)
randx_red = random.randrange(0, width, 20)
randy_red = random.randrange(0, height, 20)
red_square = pygame.Surface((block_size, block_size))
red_square.fill(red)
green_square = pygame.Surface((block_size, block_size))
green_square.fill(green)
snake = Snake(block_size, red_square, 20, 20) # create snake instance
food = Food(block_size, green_square, randx_green, randy_green) # create food instance
def redraw_window():
draw_grid(window, height, width, white)
while game_running:
dt = clock.tick(30) # time passed between each call
step = dt/1000
print(step)
FPS = 60
window.fill(black)
food.draw(window)
snake.draw(red, window, block_size)
redraw_window()
for event in pygame.event.get(): # if we hit "x" to close out the game, close out the game.
if event.type == pygame.QUIT:
pygame.quit()
exit()
keys = pygame.key.get_pressed()
if keys[pygame.K_RIGHT]: # sets direction attribute as a constant
snake.direction = "right"
if keys[pygame.K_LEFT]:
snake.direction = "left"
if keys[pygame.K_DOWN]:
snake.direction = "down"
if keys[pygame.K_UP]:
snake.direction = "up"
snake.move(step)
collision = collide_food(snake.x_loc, snake.y_loc, food.x_loc, food.y_loc)
if collision:
ac_rand_x = random.randrange(0, width, 20) # after collision, random x
ac_rand_y = random.randrange(0, height, 20) # after collision, random y
# check snake.direction.
food = Food(block_size, green_square, ac_rand_x, ac_rand_y)
food.draw(window)
snake.add_unit()
wall_collide = collide_wall(snake.x_loc, snake.y_loc)
if wall_collide:
gameOver(snake)
# break
for block in snake.body:
if snake.x_loc == block[0] and snake.y_loc == block[1]:
gameOver(snake)
pygame.display.update()
# clock.tick(FPS)
def collide_food(snake_x, snake_y, obj_x, obj_y):
distance = math.sqrt((math.pow(snake_x - obj_x, 2)) + (math.pow(snake_y - obj_y, 2)))
if distance < 20:
return True
else:
return False
def collide_wall(snake_x, snake_y):
if snake_x > width:
game_over = True
return game_over
if snake_y > height:
game_over = True
return game_over
if snake_x < 0:
game_over = True
return game_over
if snake_y < 0:
game_over = True
return game_over
def collide_self(snake_x, snake_y, body_x, body_y):
if (snake_x and snake_y) == (body_x and body_y):
return True
else:
return False
def draw_grid(window, height, width, color):
x = 0
y = 0
grid_blocks = 20
for i in range(height):
x += 20
pygame.draw.line(window, color, (x, 0), (x, height), 1)
for j in range(width):
y += 20
pygame.draw.line(window, color, (0, y), (height, y), 1)
# pygame.display.update()
def display_score():
score_font = pygame.font.SysFont()
def main_menu(width, height):
clock = pygame.time.Clock()
FPS = 60
width = width
height = height
run = True
title_font = pygame.font.SysFont("Courier New", 16)
title_font.set_bold(True)
white = pygame.Color(255, 255, 255)
while run:
window.fill(white)
title_label = title_font.render("Snake Game by Nick Rinaldi ", 1, (0, 0, 0))
sponser_label = title_font.render("Sponsored by #goodproblemsnyc", 1, (0, 0, 0))
window.blit(title_label, ((width/4, height/4)))
window.blit(sponser_label, ((width/4, height/4 + 30)))
pygame.display.update()
for event in pygame.event.get(): # if we hit "x" to close out the game, close out the game.
if event.type == pygame.QUIT:
pygame.quit()
exit()
if event.type == pygame.MOUSEBUTTONDOWN:
main()
pygame.quit()
main_menu(width, height)```

The bottleneck in your game is the function draw_grid, which draws far too many lines out of the window.
def draw_grid(window, height, width, color):
x = 0
y = 0
grid_blocks = 20
for i in range(height):
x += 20
pygame.draw.line(window, color, (x, 0), (x, height), 1)
for j in range(width):
y += 20
pygame.draw.line(window, color, (0, y), (height, y), 1)
If you draw a line outside the window, the statement does not draw anything, nevertheless the nested for loops still run.
Furthermore, you don't need a nested loops. You don't want to draw 19 horizontal lines for each vertical line. You want to draw 19 vertical and 19 horizontal lines. Hence 1 for-loop is enough.
Use the step argument of range to define the list of positions for the vertical and horizontal lines
def draw_grid(window, height, width, color):
tile_size = 20
for p in range(tile_size, height, tile_size):
pygame.draw.line(window, color, (p, 0), (p, height), 1)
pygame.draw.line(window, color, (0, p), (height, p), 1)

if the size is 400 * 400 pixels, the total pixels 160000 so moving at a 20 pixel rate, because there are less pixels the an 800 * 800 board (320000 pixels) it looks like you are going faster because there are less pixels. Find an equation to calculate the correct speed on differently sized boards.
Sincerely,
Zac

Ship moves up and left faster than down and right when rotating in pygame

I am working on a simple game. I created a pygame sprite which and tested it by making it move forward and rotating at a consistent speed. However, it seams to be moving left and up (where sin and cos are negative) quicker than right and down (where sin and cos are positive). I tested it without moving and just rotating and it works.
Here is the code:
import pygame
import sys
from math import cos, sin, pi
from time import sleep
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 800
FPS = 60
pygame.init()
DISPLAY = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
CLOCK = pygame.time.Clock()
RED = (255, 0, 0)
GREEN = (0, 255, 0)
BLUE = (0, 0, 255)
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
SHIP_BLUE_IMG = pygame.image.load('./spaceshooter/PNG/playerShip1_blue.png').convert()
SHIP_RED_IMG = pygame.image.load('./spaceshooter/PNG/playerShip1_red.png').convert()
LASER_BLUE_IMG = pygame.image.load('./spaceshooter/PNG/Lasers/laserBlue16.png').convert()
LASER_RED_IMG = pygame.image.load('./spaceshooter/PNG/Lasers/laserRed16.png').convert()
LASER_SPEED = 10
PLAYER_SHIP_SPEED = 5
all_sprites = pygame.sprite.Group()
class Player(pygame.sprite.Sprite):
def __init__(self, img, pos, angle):
super().__init__()
img.set_colorkey((0, 0, 0, 0))
self.angle = angle
self.original_img = pygame.transform.rotate(img, 180) # Becase these images come upside down
self.image = self.original_img
self.rect = self.image.get_rect()
self.rect.center = pos
self._update_image()
def _update_image(self):
x, y = self.rect.center
self.image = pygame.transform.rotate(self.original_img, self.angle)
self.rect = self.image.get_rect()
self.rect.center = (x, y)
def _get_radeons(self):
return (self.angle*pi)/180
def rotate(self, degrees):
self.angle += degrees
self._update_image()
def update(self):
self.rotate(5)
x, y = self.rect.center
nx = sin(self._get_radeons())*PLAYER_SHIP_SPEED + x
ny = cos(self._get_radeons())*PLAYER_SHIP_SPEED + y
self.rect.center = (nx, ny)
player = Player(SHIP_BLUE_IMG, (300, 300), 45)
all_sprites.add(player)
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
DISPLAY.fill(BLACK)
all_sprites.update()
all_sprites.draw(DISPLAY)
pygame.display.update()
CLOCK.tick(FPS)
To describe what it looks like when I run it, it is a ship on a black background that rotates counter-clockwise while moving forward in what should be a circle. But instead, it is creating a sort of spiral, slowly getting closer to the top left corner of the screen.

This is an accuracy issue. Since pygame.Rect is supposed to represent an area on the screen, a pygame.Rect object can only store integral data.
The coordinates for Rect objects are all integers. [...]
The fraction part of the coordinates gets lost when the new position of the player is assigned to the Rect object:
self.rect.center = (nx, ny)
Since this is done every frame, the position error will accumulate over time.
If you want to store object positions with floating point accuracy, you have to store the location of the object in separate variables respectively attributes (self.pos) and to synchronize the pygame.Rect object. round the coordinates and assign it to the location (e.g. .center) of the rectangle:
class Player(pygame.sprite.Sprite):
def __init__(self, img, pos, angle):
# [...]
self.pos = pos
# [...]
def update(self):
self.rotate(5)
nx = sin(self._get_radeons())*PLAYER_SHIP_SPEED + self.pos[0]
ny = cos(self._get_radeons())*PLAYER_SHIP_SPEED + self.pos[1]
self.pos = (nx, ny)
self.rect.center = round(nx), round(ny)
See also Move and rotate.
Minimal example:
import math
import pygame
class Player(pygame.sprite.Sprite):
def __init__(self, img, pos, angle):
super().__init__()
img.set_colorkey((0, 0, 0, 0))
self.angle = angle
self.original_img = pygame.transform.rotate(img, 180)
self.image = self.original_img
self.rect = self.image.get_rect()
self.rect.center = pos
self.pos = pos
self.speed = 5
self.angle_step = 5
self._update_image()
def _update_image(self):
x, y = self.rect.center
self.image = pygame.transform.rotate(self.original_img, self.angle)
self.rect = self.image.get_rect()
self.rect.center = (x, y)
def update(self):
self.angle += self.angle_step
self._update_image()
nx = math.sin(math.radians(self.angle)) * self.speed + self.pos[0]
ny = math.cos(math.radians(self.angle)) * self.speed + self.pos[1]
self.pos = (nx, ny)
self.rect.center = round(nx), round(ny)
pygame.init()
window = pygame.display.set_mode((300, 300))
clock = pygame.time.Clock()
background = pygame.Surface(window.get_size())
background.set_alpha(5)
all_sprites = pygame.sprite.Group()
ship_image = pygame.image.load('Rocket64.png').convert_alpha()
player = Player(ship_image, (window.get_width()//2-40, window.get_height()//2+40), 45)
all_sprites.add(player)
run = True
while run:
clock.tick(60)
for event in pygame.event.get():
if event.type == pygame.QUIT:
run = False
all_sprites.update()
window.blit(background, (0, 0))
all_sprites.draw(window)
pygame.display.update()
pygame.quit()
exit()

How can I make my player move whilst still being able to rotate?

I am currently writing a program for my first python game (a simple top down shooter) and I have so far gotten to here using tutorials and examples online to help me build the code.
My character is able to rotate using vectors and that is all working how I want it to.
However, I cannot seem to make the player move using the arrow keys. I converted the velocity to a vector and when running the code and using the arrow keys, the players coordinates are actually changing and so in my head the player should be moving but isn't.
My initial thoughts are that player isn't being redrawn to the surface each time and hence staying in the same position, but I am not sure if this is correct.
What amendments/changes can I make in order to make this work as this problem has been driving me crazy the last few days.
import math
from random import randint
import pygame
from pygame.math import Vector2
pygame.init()
screen = pygame.display.set_mode((600, 600))
screen_width = 600
screen_height = 600
black = (0, 0, 0)
pygame.display.set_caption("gang")
clock = pygame.time.Clock()
class Character:
def __init__(self, x, y, width, height):
self.x = x
self.y = y
self.width = width
self.height = height
class Player(pygame.sprite.Sprite):
def __init__(self, pos):
super().__init__()
self.image = pygame.Surface((50, 30), pygame.SRCALPHA)
pygame.draw.polygon(self.image, pygame.Color('steelblue2'),
[(0, 0), (50, 15), (0, 30)])
self.orig_image = self.image
self.rect = self.image.get_rect(center=pos)
self.pos = Vector2(pos)
self.velocityx = Vector2(12, 0)
self.velocityy = Vector2(0, 12)
def update(self):
self.rotate()
def rotate(self):
direction = pygame.mouse.get_pos() - self.pos
radius, angle = direction.as_polar()
self.image = pygame.transform.rotate(self.orig_image, -angle)
self.rect = self.image.get_rect(center=self.rect.center)
class Enemy(Character):
def __init__(self, x, y, width, height):
Character.__init__(self, x, y, width, height)
def draw(self, win):
pygame.draw.rect(win, (0, 255, 0), (jeff.x, jeff.y, jeff.width, jeff.height))
def draw_window():
screen.fill((30, 30, 30))
jeff.draw(screen)
all_sprites.update()
all_sprites.draw(screen)
pygame.display.update()
def xor(a, b):
if bool(a) != bool(b):
return True
else:
return False
def game_end():
pygame.font.init()
text = pygame.font.Font('freesansbold.ttf', 32)
text_surface = text.render('Game Over', False, (0, 0, 0))
text_rect = text_surface.get_rect()
text_rect.center = (86, 86)
screen.blit(text_surface, (172, 172))
pygame.display.update()
mag = Player((150, 150))
playersprite = pygame.sprite.RenderPlain(mag)
all_sprites = pygame.sprite.Group(Player((300, 220)))
jeff = Enemy(randint(300, 500), randint(300, 500), 60, 60)
bullets = []
def main():
run = True
while run:
clock.tick(60)
keys = pygame.key.get_pressed()
if xor(keys[pygame.K_a], keys[pygame.K_LEFT]):
mag.pos -= mag.velocityx
print(mag.pos)
elif xor(keys[pygame.K_d], keys[pygame.K_RIGHT]):
mag.pos += mag.velocityx
print(mag.pos)
elif xor(keys[pygame.K_w], keys[pygame.K_UP]):
mag.pos -= mag.velocityy
print(mag.pos)
elif xor(keys[pygame.K_s], keys[pygame.K_DOWN]):
mag.pos += mag.velocityy
print(mag.pos)
draw_window()
main()

There are 2 issues in your code.
The Player object mag is not rendered at all, because you've created a 2nd Player object:
mag = Player((150, 150))
playersprite = pygame.sprite.RenderPlain(mag)
all_sprites = pygame.sprite.Group(Player((300, 220)))
Create 1 Player object and add it to the pygame.sprite.Group all_sprites:
mag = Player((150, 150))
playersprite = pygame.sprite.RenderPlain(mag)
all_sprites = pygame.sprite.Group(mag)
When the pygame.sprite.Sprite of a .sprite.Group are drawn by draw(), then the .image is drawn at the location which is defined by .rect.
You've to update the position of the .rect attribute by .pos in .update:
class Player(pygame.sprite.Sprite):
# [...]
def update(self):
# update position
self.rect.center = (int(self.pos.x), int(self.pos.y))
# update orientation
self.rotate()
def rotate(self):
direction = pygame.mouse.get_pos() - self.pos
radius, angle = direction.as_polar()
self.image = pygame.transform.rotate(self.orig_image, -angle)
self.rect = self.image.get_rect(center=self.rect.center)

Pygame's arc to be used as a sprite

I am trying to use the pygame.draw.arc() as a sprite, but its not displaying on the screen.
I can achieve the same effect by writing same code in the main loop, but once I try to create a sprite, the effect is not being displayed.
(One part in the main-loop can be un-commented to see the desired effect as well.)
Any pointers could be of great help.
import pygame
import random
import math
BLACK = ( 0, 0, 0)
WHITE = ( 255, 255, 255)
RED = ( 255, 0, 0)
SCREEN_WIDTH = 513
SCREEN_HEIGHT = 513
class Block(pygame.sprite.Sprite):
def __init__(self, color, width, height):
pygame.sprite.Sprite.__init__(self)
self.color = color
self.image = pygame.Surface([width, height])
self.image.fill(WHITE)
self.image.set_colorkey(WHITE)
self.center_x = SCREEN_WIDTH/2-15
self.center_y = SCREEN_HEIGHT/2-15
# Draw the ellipse, THIS WORKS PERFECTLY
#pygame.draw.ellipse(self.image, color, [0, 0, width, height])
self.i=0
#THIS DOESN'T WORK FOR SOME REASON
pygame.draw.arc(self.image, (0,255,255),(25,25,450,450),0+(self.i*math.pi)/180,math.pi/6 +(self.i*math.pi)/180,10)
self.rect = self.image.get_rect()
self.angle = 0
self.radius = 210
self.speed = 0.05
def update(self):
self.i += self.speed
pygame.init()
screen = pygame.display.set_mode([SCREEN_WIDTH, SCREEN_HEIGHT])
all_sprites_list = pygame.sprite.Group()
block = Block(BLACK, 20, 15)
all_sprites_list.add(block)
done = False
clock = pygame.time.Clock()
i=0
while not done:
for event in pygame.event.get():
if event.type == pygame.QUIT: #
done = True
screen.fill(WHITE)
all_sprites_list.update()
all_sprites_list.draw(screen)
#UNCOMMENT TO SEE THE DESIRED EFFECT
#i= i+1
#pygame.draw.arc(screen, (0,255,255),(25,25,450,450),0+(i*math.pi)/180,math.pi/6 +(i*math.pi)/180,10)
pygame.display.flip()
clock.tick(60)
pygame.quit()

You draw the arc outside of the surface.
Here you pass the values 20 and 15 to Block:
block = Block(BLACK, 20, 15)
So you create a Surface with the size 20, 15:
self.image = pygame.Surface([width, height])
Then you draw the arc in the area 25,25,450,450:
pygame.draw.arc(self.image, (0,255,255),(25,25,450,450),0+(self.i*math.pi)/180,math.pi/6 +(self.i*math.pi)/180,10)
But that area is outside the surface, because it is only 20 pixels wide and 15 pixels high.
The area you passed to pygame.draw.arc is relative to self.image.