Games using IMU with SenseHat

For this sense hat game, I tried IMU (Inertial Measurement Unit).

If you tilt the body, the red pixels will move. This clears when you take all the green pixels. The blue pixel in the rightmost column is the time limit.

However, it wasn't the IMU that I struggled with this time, but the Python thread that I used for the first time at the same time. The IMU was pretty easy, just like the joystick.

I tried running a thread that counts the time limit in parallel with the main loop, but I didn't know how to control each other (stop the thread if the game is cleared and stop the main loop when the time is over). I learned about the control by threading.Event () and was able to solve it.

from sense_hat import SenseHat, ACTION_PRESSED, ACTION_HELD, ACTION_RELEASED
from time import sleep
from random import randint
from copy import copy
import threading

sense = SenseHat()
sense.clear()

red = (255, 0, 0)
blue = (0, 0, 255)
yellow=(255,255,0)
purple=(128,0,128)
green=(0,255,0)
indigg=(75,0,130)
orange=(255,128,0)
black=[0,0,0]

sense.set_rotation(0)

ncol = 8
nrow = 8
col_max = ncol - 2
row_max = nrow - 1

event = threading.Event()

def setdisturbs(num_disturbs, initpos):
    disturbs = list()
    for i in range(0,num_disturbs):
        while True:
            candi = (randint(0, col_max), randint(0, row_max))
            if candi == initpos:
                continue

            duplicated = False
            for j in disturbs:
                if candi == j:
                    duplicated = True
                    break
            if duplicated:
                continue
            disturbs.append(candi)
            break

    color_disturb = green
    for i in disturbs:
        sense.set_pixel(i[0], i[1], color_disturb)

def timecount(interval):
    col = ncol - 1
    for row in range(row_max):
        sense.set_pixel(col, row, blue)
        if event.wait(interval):
            break
    event.set()

speed = 0.2
num_disturbs = 10
interval = 3

ballpos = (ncol/2, nrow/2)
sense.set_pixel(ballpos[0], ballpos[1], red)
ballvec = (0, 0)

setdisturbs(num_disturbs, ballpos)

t1 = threading.Thread(target=timecount, args=(interval,))
t1.start()

success = False
while True:
    if event.is_set():
        break
    
    acceleration = sense.get_accelerometer_raw()
    x = acceleration['x']
    y = acceleration['y']
    z = acceleration['z']

    x=int(round(x, 0))
    y=int(round(y, 0))
    z=int(round(z, 0))
    
    #print("x={0}, y={1}, z={2}".format(x, y, z))

    ballvec = (x, y)
    # if x  == -1: #left
    #   ballvec = (-1, 0)
    # elif y == -1: #top
    #   ballvec = (0, -1)
    # elif x == 1: #right
    #   ballvec = (1, 0)
    # elif y == 1: #bottom
    #   ballvec = (0, 1)
    # else:
    #   ballvec = (0, 0)

    sense.set_pixel(ballpos[0], ballpos[1], black)
    ballpos = (max(min(ballpos[0] + ballvec[0], col_max), 0), max(min(ballpos[1] + ballvec[1], row_max), 0))
    sense.set_pixel(ballpos[0], ballpos[1], red)

    #print("col={0}, row={1}".format(ballpos[0], ballpos[1]))
    num_colorpx = 0
    cur_px = sense.get_pixels()
    for px in cur_px:
        if px == [0,252,0]: # green
            num_colorpx = num_colorpx + 1
    if num_colorpx == 0:
        event.set()
        success = True
        break

    sleep(speed)

if success:
    sense.show_letter("O")
else:
    sense.show_letter("X")

sleep(2)
sense.clear()