bubble_blaster.py

#!/usr/bin/env python3
# Bubble blaster game from Carol Vorderman book pp.164 onwards

from tkinter import *
HEIGHT = 500
WIDTH = 800
window = Tk()
window.title("Bubble Blaster")
window.attributes("-topmost", 1)

c = Canvas(window, width=WIDTH, height=HEIGHT, bg="darkblue")
c.pack()

ship_id = c.create_polygon(5, 5, 5, 25, 30, 15, fill="red")
ship_id2 = c.create_oval(0, 0, 30, 30, outline="red")
SHIP_R = 15
MID_X = WIDTH/2
MID_Y = HEIGHT/2
c.move(ship_id, MID_X, MID_Y)
c.move(ship_id2, MID_X, MID_Y)
SHIP_SPD = 10

def move_ship(event):
    if event.keysym == "Up":
        c.move(ship_id, 0, -SHIP_SPD)
        c.move(ship_id2, 0, -SHIP_SPD)
    elif event.keysym == "Down":
        c.move(ship_id, 0, SHIP_SPD)
        c.move(ship_id2, 0, SHIP_SPD)
    elif event.keysym == "Left":
        c.move(ship_id, -SHIP_SPD, 0)
        c.move(ship_id2, -SHIP_SPD, 0)
    elif event.keysym == "Right":
        c.move(ship_id, SHIP_SPD, 0)
        c.move(ship_id2, SHIP_SPD, 0)
c.bind_all("<Key>", move_ship)

from random import randint
bub_id = list()
bub_r = list()
bub_speed = list()
MIN_BUB_R = 10
MAX_BUB_R = 30
MAX_BUB_SPD = 10
GAP = 100
def create_bubble():
    x = WIDTH + GAP
    y = randint(0, HEIGHT)
    r = randint(MIN_BUB_R, MAX_BUB_R)
    id1 = c.create_oval(x - r, y - r, x + r, y + r, outline = "white")
    bub_id.append(id1)
    bub_r.append(r)
    bub_speed.append(randint(1, MAX_BUB_SPD))

def move_bubbles():
    for i in range(len(bub_id)):
        c.move(bub_id[i], -bub_speed[i], 0)

def get_coords(id_num):
    pos = c.coords(id_num)
    x = (pos[0] + pos[2])/2
    y = (pos[1] + pos[3])/2
    return x, y

def del_bubble(i):
    del bub_r[i]
    del bub_speed[i]
    c.delete(bub_id[i])
    del bub_id[i]

def clean_up_bubs():
    for i in range(len(bub_id)-1, -1, -1):
        x, y = get_coords(bub_id[i])
        if x < -GAP:
            del_bubble(i)

from math import sqrt
def distance(id1, id2):
    x1, y1 = get_coords(id1)
    x2, y2 = get_coords(id2)
    return sqrt((x2 - x1)**2 + (y2 - y1)**2)

def collision():
    points = 0
    for bub in range(len(bub_id)-1, -1, -1):
        if distance(ship_id2, bub_id[bub]) < (SHIP_R + bub_r[bub]):
            points += (bub_r[bub] + bub_speed[bub])
            del_bubble(bub)
    return points

c.create_text(50, 30, text="TIME", fill="white")
c.create_text(150, 30, text="SCORE", fill="white")
time_text = c.create_text(50, 50, fill="white")
score_text = c.create_text(150, 50, fill="white")

def show_score(score):
    c.itemconfig(score_text, text=str(score))


def show_time(time_left):
    c.itemconfig(time_text, text=str(time_left))

from time import sleep, time
BUB_CHANCE = 10
TIME_LIMIT = 30
BONUS_SCORE = 1000
score = 0
bonus = 0
end = time() + TIME_LIMIT
# MAIN GAME LOOP
while time() < end:
    if randint(1, BUB_CHANCE) == 1:
        create_bubble()
    move_bubbles()
    clean_up_bubs()
    score += collision()
    if (int(score/BONUS_SCORE)) > bonus:
        bonus += 1
        end += TIME_LIMIT
    show_score(score)
    show_time(int(end - time()))
    # print(score)
    window.update()
    sleep(0.01)

c.create_text(MID_X, MID_Y, text="GAME OVER", fill="white", font=("Helvetica", 30))
c.create_text(MID_X, MID_Y+30, text="Score: "+str(score), fill="white")
c.create_text(MID_X, MID_Y+45, text="Bonus time: "+str(bonus+TIME_LIMIT), fill="white")
# Need to add the following to paint the "game over" screen then leave it there for a bit
window.update()
sleep(2)