Pytris is a clone of the classic tetromino puzzle game Tetris. I built this game because my previous attempt at making a Tetris clone was incomplete. For this attempt, I’ve written an engine to be as performant as Python will allow me to, barring the usage of any JIT compilation techniques.

I’ve achieved this by utilizing Pygame’s built-in sprite type, DirtySprite, and the LayeredDirty sprite group. The “Dirty” part of these types denotes when or if the sprite should get redrawn, stopping the renderer from wasting time constantly redrawing some sprites, like backgrounds and other static objects.

My signal object, inspired by Godot’s object of the same name, is implemented in just a few lines because Python’s Dynamic typing allows implementing it with relative ease.

from typing import Callable
import inspect

class Signal():
    def __init__(self, function_definition: Callable):
        self.funcs = []

    def emit(self, *args):
        for func in self.funcs:
            func(*args)

    def connect(self, func: Callable):
        self.funcs.append(func)

The typical Pytris object initialization function looks simple, and this is because the main game object handles a lot of the object necessities.

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

    self.bkg = GameObject(
        name="TetrominoBox Background",
        layer=game_globals.Layer.Middle,
        parent=self,
        image=pygame.image.load("assets/Box_test.png"),
    )

    self.sup_bkg = GameObject(
        name="Tetrominobox SuperBackground",
        layer=game_globals.Layer.Middle,
        parent=self.bkg,
        image=pygame.image.load("assets/Box_test_super.png")
    )

    self.sup_bkg.set_position((
        self.bkg.rect.centerx - (self.sup_bkg.rect.width / 2),
        0
    ))

    self.tetromino = GameObject(
        name="TetrominoBox Tetromino",
        layer=game_globals.Layer.Foreground,
        image=pygame.Surface((0, 0)),
        parent=self
    )

Currently the game is not available as I haven’t had time to finish it. I’ll update this page when I do.