Created the main file and integrated the engine into it.

assets/stacked_sprites/animated/sprite_properties.json

@@ -1,6 +1,6 @@
 {
     "Bla": {
-        "path": "../assets/stacked_sprites/animated/bla/",
+        "path": "assets/stacked_sprites/animated/bla/",
         "layers": 3,
         "scale": 16
     }

assets/stacked_sprites/sprite_properties.json

@@ -1,11 +1,11 @@
 {
     "Robot": {
-        "path": "../assets/stacked_sprites/Robot.png",
+        "path": "assets/stacked_sprites/Robot.png",
         "layers": 16,
         "scale": 8
     },
     "Building": {
-        "path": "../assets/stacked_sprites/Building.png",
+        "path": "assets/stacked_sprites/Building.png",
         "layers": 80,
         "scale": 4
     }

moss.py

@@ -0,0 +1,44 @@
+#!/usr/bin/python3
+
+import pygame
+from wobbl_tools import pg
+from sprite_stacking_engine.engine import Engine
+
+
+class Moss:
+    def __init__(self):
+        self.screen = pygame.display.set_mode((1400, 800))
+        self.clock = pygame.time.Clock()
+        self.engine = Engine(self)
+        self.time = 0
+        self.delta_time = 0.01
+
+        self.running = True
+
+    def update(self):
+        pygame.display.set_caption(f"{self.clock.get_fps(): .1f}")
+        self.delta_time = self.clock.tick(60)
+        self.engine.update()
+
+    def draw(self):
+        self.engine.draw()
+
+        self.screen.blit(self.engine.surface, (0, 0))
+
+        pygame.display.flip()
+
+    def get_time(self):
+        self.time = pygame.time.get_ticks() * 0.001
+
+    def tick(self):
+        self.engine.check_events()
+        self.get_time()
+        self.update()
+        self.draw()
+
+
+if __name__ == "__main__":
+    game = Moss()
+
+    while game.running:
+        game.tick()

sprite_stacking_engine/cache.py

@@ -1,8 +1,7 @@
 #!/usr/bin/python3
 
 import os
-from random import randrange
-from settings import *
+from sprite_stacking_engine.settings import *
 
 
 class Cache:

sprite_stacking_engine/engine.py

@@ -1,19 +1,16 @@
 #!/usr/bin/python3
 
 import sys
-from settings import *
-from stacked_sprite import StackedSprite
-from cache import Cache
-from player import Player
-from scene import Scene
+from sprite_stacking_engine.settings import *
+from sprite_stacking_engine.cache import Cache
+from sprite_stacking_engine.player import Player
+from sprite_stacking_engine.scene import Scene
 
 
-class App:
-    def __init__(self):
-        self.screen = pygame.display.set_mode(RES)
-        self.clock = pygame.time.Clock()
-        self.time = 0
-        self.delta_time = 0.01
+class Engine:
+    def __init__(self, app):
+        self.app = app
+        self.surface = pygame.Surface(self.app.screen.get_size())  # surface to draw the sprites on
         # groups
         self.main_group = pygame.sprite.LayeredUpdates()
         # game objects
@@ -23,13 +20,10 @@ class App:
 
     def update(self):
         self.main_group.update()
-        pygame.display.set_caption(f"{self.clock.get_fps(): .1f}")
-        self.delta_time = self.clock.tick(60)
 
     def draw(self):
-        self.screen.fill(BG_COLOR)
-        self.main_group.draw(self.screen)
-        pygame.display.flip()
+        self.surface.fill(BG_COLOR)
+        self.main_group.draw(self.surface)
 
     def check_events(self):
         for event in pygame.event.get():
@@ -37,17 +31,7 @@ class App:
                 pygame.quit()
                 sys.exit()
 
-    def get_time(self):
-        self.time = pygame.time.get_ticks() * 0.001
-
-    def run(self):
-        while True:
-            self.check_events()
-            self.get_time()
-            self.update()
-            self.draw()
-
-
-if __name__ == "__main__":
-    app = App()
-    app.run()
+    def tick(self):
+        self.check_events()
+        self.update()
+        self.draw()

sprite_stacking_engine/player.py

@@ -1,13 +1,14 @@
 #!/usr/bin/python3
 
-from settings import *
+from sprite_stacking_engine.settings import *
 import math
 
 
 class Player(pygame.sprite.Sprite):
-    def __init__(self, app):
-        self.app = app
-        self.group = app.main_group
+    def __init__(self, engine):
+        self.engine = engine
+        self.app = engine.app
+        self.group = self.engine.main_group
         super().__init__(self.group)
 
         self.group.change_layer(self, CENTER.y)  # simpy set the layer to the y center of the screen because that is -

sprite_stacking_engine/scene.py

@@ -1,6 +1,6 @@
 #!/usr/bin/python3
 
-from stacked_sprite import *
+from sprite_stacking_engine.stacked_sprite import *
 from random import uniform
 
 P = "player"
@@ -23,8 +23,9 @@ MAP_CENTER = MAP_SIZE / 2
 
 
 class Scene:
-    def __init__(self, app):
-        self.app = app
+    def __init__(self, engine):
+        self.engine = engine
+        self.app = engine.app
         self.load_scene()
 
     def load_scene(self):
@@ -36,11 +37,11 @@ class Scene:
                 pos = vec2(i, j) + vec2(0.5)
 
                 if name == "player":
-                    self.app.player.offset = pos * TILE_SIZE
+                    self.engine.player.offset = pos * TILE_SIZE
 
                 elif name:
                     if name == "Bla":
-                        AnimatedStackedSprite(self.app, name=name, pos=rand_pos(pos), rot=rand_rot())
+                        AnimatedStackedSprite(self.engine, name=name, pos=rand_pos(pos), rot=rand_rot())
 
                     else:
-                        StackedSprite(self.app, name=name, pos=rand_pos(pos), rot=rand_rot())
+                        StackedSprite(self.engine, name=name, pos=rand_pos(pos), rot=rand_rot())

sprite_stacking_engine/settings.py

@@ -27,8 +27,8 @@ NUM_ANGLES = 180  # multiple of 360
 TRANSP_COLOR = (45, 54, 76)
 OUTLINE = True
 
-SPRITE_ATTRS = load_json("../assets/stacked_sprites/sprite_properties.json")
-ANIMATED_SPRITE_ATTRS = load_json("../assets/stacked_sprites/animated/sprite_properties.json")
+SPRITE_ATTRS = load_json("assets/stacked_sprites/sprite_properties.json")
+ANIMATED_SPRITE_ATTRS = load_json("assets/stacked_sprites/animated/sprite_properties.json")
 
 # SPRITE_ATTRS = {
 #     "Robot": {

sprite_stacking_engine/stacked_sprite.py

@@ -1,17 +1,18 @@
 #!/usr/bin/python3
 import pygame
 
-from settings import *
+from sprite_stacking_engine.settings import *
 import math
 
 
 class StackedSprite(pygame.sprite.Sprite):
-    def __init__(self, app, name, pos, rot=0):
-        self.app = app
+    def __init__(self, engine, name, pos, rot=0):
+        self.engine = engine
+        self.app = engine.app
         self.name = name
         self.pos = vec2(pos) * TILE_SIZE
-        self.player = self.app.player
-        self.group = self.app.main_group
+        self.player = engine.player
+        self.group = engine.main_group
         super().__init__(self.group)
 
         self.attrs = SPRITE_ATTRS[name]  # get attributes
@@ -21,8 +22,8 @@ class StackedSprite(pygame.sprite.Sprite):
 
         self.y_offset = vec2(0, -self.attrs["layers"] / 2 * self.attrs["scale"])  # calculate the y offset because the -
         # images position in pygame is the position of the top left corner of the image and we use the bottom position
-        self.cache = self.app.cache.stacked_sprite_cache
-        self.viewing_angle = app.cache.viewing_angle
+        self.cache = engine.cache.stacked_sprite_cache
+        self.viewing_angle = engine.cache.viewing_angle
         self.rotated_sprites = self.cache[name]["rotated_sprites"]
         self.angle = 0
         self.screen_position = vec2(0)
@@ -52,12 +53,13 @@ class StackedSprite(pygame.sprite.Sprite):
 
 
 class AnimatedStackedSprite(pygame.sprite.Sprite):  # stacked sprite class for animated sprites, works nearly the same
-    def __init__(self, app, name, pos, rot=0):
-        self.app = app
+    def __init__(self, engine, name, pos, rot=0):
+        self.engine = engine
+        self.app = engine.app
         self.name = name
         self.pos = vec2(pos) * TILE_SIZE
-        self.player = self.app.player
-        self.group = self.app.main_group
+        self.player = engine.player
+        self.group = engine.main_group
         super().__init__(self.group)
 
         self.attrs = ANIMATED_SPRITE_ATTRS[name]
@@ -67,8 +69,8 @@ class AnimatedStackedSprite(pygame.sprite.Sprite):  # stacked sprite class for a
 
         self.attrs["animated"] = True  # set the animated attribute to true so that the cache knows that this sprite -
         self.y_offset = vec2(0, -self.attrs["layers"] / 2 * self.attrs["scale"])  # is animated
-        self.cache = self.app.cache.stacked_sprite_cache
-        self.viewing_angle = app.cache.viewing_angle
+        self.cache = engine.cache.stacked_sprite_cache
+        self.viewing_angle = engine.cache.viewing_angle
         self.frame = list(self.cache[name]["frames"].keys())[0]  # set the frame to the first frame
         self.rotated_sprites = self.cache[name]["frames"][self.frame]["rotated_sprites"]
         self.angle = 0