Scuffed awful rendering, not good at z buffer ordering but doing that ecs style is...

diff --git a/src/pacman/ecs/__init__.py b/src/pacman/ecs/__init__.py
index 5a71480ffa5c5a44717f3619cd7227629c8e6e2c..44eb0adbec0517f19f1912bcff6992a5fac90b2a 100644 (file)
--- a/src/pacman/ecs/__init__.py
+++ b/src/pacman/ecs/__init__.py
@@ -3,6 +3,7 @@ from dataclasses import dataclass
 from typing import Any, cast, get_args, overload
 
 import pygame.sprite
+from pygame import Vector2
 
 
 class Entity:
@@ -18,6 +19,10 @@ class Resource[T]:
     storage: type[T]
 
 
+class SkipSystem(Exception):
+    pass
+
+
 type System = Callable[["World"], None]
 
 type Plugin = Callable[["World"], None] | tuple[Plugin, ...]
@@ -142,7 +147,15 @@ class World:
         if schedule not in self._schedules:
             return
         for system in self._schedules[schedule]:
-            system(self)
+            try:
+                system(self)
+            except SkipSystem:
+                pass
+
+    def res_s[T](self, ty: type[T]) -> T:
+        if Resource(ty) not in self:
+            raise SkipSystem()
+        return self[Resource(ty)]
 
     def run(
         self,
@@ -197,23 +210,70 @@ def minimal_plugins(world: World) -> None:
 
 
 @dataclass
-class Vec2:
-    x: float
-    y: float
+class ScreenCoord2D:
+    vec: Vector2
+
+
+class ShouldRender:
+    pass
 
 
 @dataclass
-class Pos:
-    vec: Vec2
+class Window:
+    surface: pygame.Surface
+
+
+def init_window(world: World) -> None:
+    world[Resource(Window)] = Window(pygame.display.set_mode())
 
 
 @dataclass
-class Model2D:
-    sprite: pygame.Surface
+class Sprite2D:
+    surface: pygame.Surface
 
 
-class ShouldRender:
-    pass
+def render_sprite2d(world: World) -> None:
+    window = world.res_s(Window)
+    sprites = [
+        (sprite.surface, coord.vec)
+        for coord, sprite, _ in world.query(
+            tuple[ScreenCoord2D, Sprite2D, ShouldRender]
+        )
+    ]
+    window.surface.blits(sprites)
+
+
+@dataclass
+class ShapeColor:
+    color: pygame.Color
+
+
+@dataclass
+class Circle:
+    radius: float
+
+
+def render_circle2d(world: World) -> None:
+    window = world.res_s(Window)
+    for circle, coord, color, _ in world.query(
+        tuple[Circle, ScreenCoord2D, ShapeColor, ShouldRender]
+    ):
+        pygame.draw.circle(
+            window.surface, color.color, coord.vec, circle.radius
+        )
+
+
+@dataclass
+class Rectangle:
+    dims: Vector2
+
+
+def render_rectangle2d(world: World) -> None:
+    window = world.res_s(Window)
+    for rect, coord, color, _ in world.query(
+        tuple[Rectangle, ScreenCoord2D, ShapeColor, ShouldRender]
+    ):
+        pygame.draw.rect(window.surface, color.color, (coord.vec, rect.dims))
 
 
 world = World()