Re: [kivy-users] Abridged summary of kivy-users@googlegroups.com - 2 updates in 1 topic

[Paul Wandendeya]

import kivy

from kivy.app import App

from kivy.uix.label import Label

from kivy.uix.boxlayout import BoxLayout

from kivy.clock import Clock

from kivy.core.sensor import Accelerometer

class ProjectileStopApp(App):

    def build(self):

        # Given values

        self.countdown_time = 5  # seconds

        self.impact_threshold = 10  # Acceleration threshold for projectile impact (in m/s^2)

        self.projectile_detected = False

        # Create the app layout

        layout = BoxLayout(orientation='vertical')

        self.label = Label(text=f"Countdown: {self.countdown_time}")

        layout.add_widget(self.label)

        # Initialize the accelerometer sensor

        self.accelerometer = Accelerometer()

        self.accelerometer.bind(acceleration=self.check_projectile)

        # Schedule a function to check for projectile impact

        self.countdown = self.countdown_time

        Clock.schedule_interval(self.update_countdown, 1)  # Check every second

        return layout

    def update_countdown(self, dt):

        # Decrease the countdown time

        self.countdown -= 1

        # Update the label text based on the countdown

        self.label.text = f"Countdown: {self.countdown}"

        # Check if projectile impact is detected

        if self.projectile_detected:

            self.label.text = "Projectile impact detected!"

            Clock.unschedule(self.update_countdown)  # Stop the countdown

    def check_projectile(self, sensor, acceleration):

        # Check if the acceleration exceeds the impact threshold

        if abs(acceleration.x) > self.impact_threshold or \

           abs(acceleration.y) > self.impact_threshold or \

           abs(acceleration.z) > self.impact_threshold:

            self.projectile_detected = True

if __name__ == '__main__':

    ProjectileStopApp().run() can you assist me to correct the code to simulate accelerometer data?

On Sat, Jun 15, 2024, 3:00 AM <kivy-...@googlegroups.com> wrote:

kivy-...@googlegroups.com

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• Detect the presence or impact of the projectile. - 2 Updates

Detect the presence or impact of the projectile.

Paul Wandendeya <paulwan...@gmail.com>: Jun 14 03:53PM +0300 The project will make bullets of the enemy fall off far away before humans such like bullet of Oswald who was involved in the actions of destroying life of the fourth President of USA John ...more

ELLIOT GARBUS <elli...@cox.net>: Jun 14 05:46PM There are some elements in the program that do not make sense.   # Register the accelerometer sensor self.accelerometer = Window.request_accelerometer()   The Window class does not have a method ...more

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[ElliotG]

"can you assist me to correct the code to simulate accelerometer data?"

Here is an example that simulates an accelerometer.

from kivy.app import App
from kivy.clock import Clock
from kivy.lang import Builder
from kivy.properties import AliasProperty, NumericProperty
from kivy.event import EventDispatcher

kv = """
BoxLayout:
    orientation: 'vertical'
    Label:
        id: label
        text: f'Countdown: {app.countdown_time}'
"""


class Accelerometer(EventDispatcher):
    x = NumericProperty()
    y = NumericProperty()
    z = NumericProperty()

    def get_acceleration(self):
        return (self.x ** 2 + self.y ** 2 + self.z ** 2) ** 0.5

    acceleration = AliasProperty(get_acceleration, None, bind=['x', 'y', 'z'])

    def simulate(self, x, y, z):
        self.x = x
        self.y = y
        self.z = z


class ProjectileStopApp(App):
    countdown_time = NumericProperty(5)  # seconds

    def __init__(self, **kwargs):
        super().__init__(**kwargs)

        self.impact_threshold = 10  # Acceleration threshold for projectile impact (in m/s^2)
        self.projectile_detected = False

        self.schedule = None  # holds the countdown schedule

        # Initialize the accelerometer sensor
        self.accelerometer = Accelerometer()
        self.accelerometer.bind(acceleration=self.check_projectile)

    def build(self):

        # Schedule a function to check for projectile impact

        self.schedule = Clock.schedule_interval(self.update_countdown, 1)  # Check every second
        return Builder.load_string(kv)

    def update_countdown(self, dt):
        # Decrease the countdown time

        self.countdown_time -= 1

        if self.countdown_time == 3:
            # simulate a change in acceleration
            self.accelerometer.simulate(100, 0, 0)

        # Check if projectile impact is detected
        if self.projectile_detected:

            self.root.ids.label.text = "Projectile impact detected!"
            self.schedule.cancel()  # Stop the countdown

        if self.countdown_time < 0:
            self.root.ids.label.text = "Countdown completed, No impact detected"
            self.schedule.cancel()  # Stop the countdown

    def check_projectile(self, acceleration, value):
        print(f'{acceleration=} {value=}')

        # Check if the acceleration exceeds the impact threshold

        if (abs(acceleration.x) > self.impact_threshold or
                abs(acceleration.y) > self.impact_threshold or
                abs(acceleration.z) > self.impact_threshold):

            self.projectile_detected = True


if __name__ == '__main__':
    ProjectileStopApp().run()