Last active
January 22, 2021 20:51
-
-
Save quitegreensky/9050acdb0cee666efb161ceaec564a85 to your computer and use it in GitHub Desktop.
snowfall made with kivy
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| from kivy.uix.floatlayout import FloatLayout | |
| from kivy.lang import Builder | |
| from kivy.properties import StringProperty, NumericProperty, ListProperty | |
| from kivy.clock import Clock | |
| from kivy.animation import Animation | |
| from random import randint | |
| from kivy.metrics import dp | |
| Builder.load_string( | |
| """ | |
| <SnowItem> | |
| opacity : 0 | |
| size_hint: None, None | |
| canvas.before: | |
| Color: | |
| rgba: 1,1,1,1 | |
| Ellipse: | |
| pos: self.pos | |
| size: self.size | |
| """ | |
| ) | |
| class SnowItem(FloatLayout): | |
| def __init__(self, **kwargs): | |
| super().__init__(**kwargs) | |
| Clock.schedule_once(self._update) | |
| def _update(self, *args): | |
| (Animation(opacity = 1, d=randint(*self.parent.time_before_fade))).start(self) | |
| class SnowFall(FloatLayout): | |
| size_range = ListProperty([dp(5), dp(15)]) | |
| time_range = ListProperty([3,8]) | |
| speed = ListProperty([4,15]) | |
| time_before_fade = ListProperty([0,2]) | |
| number = NumericProperty(50) | |
| def __init__(self, **kwargs): | |
| super().__init__(**kwargs) | |
| Clock.schedule_once(self._update) | |
| def add_item(self, count): | |
| for x in range(count): | |
| item = SnowItem( | |
| size = [ | |
| randint(*self.size_range), | |
| randint(*self.size_range) | |
| ], | |
| pos = [ | |
| randint(0, self.width), | |
| randint( int(self.height*0.7), self.height) | |
| ] | |
| ) | |
| self.add_widget(item) | |
| self.start_anim(item) | |
| return item | |
| def _update(self, *args): | |
| self.add_item(self.number) | |
| def start_anim(self, item): | |
| target_pos = [randint(0,self.width),0] | |
| final_time = randint(*self.time_range) | |
| speed = randint(*self.time_range) | |
| anim = Animation(pos = target_pos, d=speed) | |
| anim.start(item) | |
| #remove | |
| Clock.schedule_once(lambda x:self.remove_widget(item), final_time) | |
| #add new | |
| Clock.schedule_once(lambda x:self.add_item(1), final_time) | |
| fade_time = final_time-randint(*self.time_before_fade) | |
| Clock.schedule_once(lambda x: self._fade_out(item, fade_time), final_time-fade_time) | |
| def _fade_out(self, item, time): | |
| anim = Animation(opacity = 0, d=time) | |
| anim.start(item) | |
| if __name__ == "__main__": | |
| from kivy.app import App | |
| from kivy.factory import Factory | |
| from kivy.animation import Animation | |
| kv = """ | |
| Screen: | |
| canvas.before: | |
| Color: | |
| rgba: 0.3,0.3,1,1 | |
| Rectangle: | |
| pos: self.pos | |
| size: self.size | |
| SnowFall: | |
| size_hint: None, None | |
| size: root.size | |
| """ | |
| class Test(App): | |
| def build(self): | |
| return Builder.load_string(kv) | |
| if __name__ == '__main__': | |
| Test().run() |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment