Base structure for engine

src/engine.py

@@ -1,4 +1,40 @@
-class Engine:
-    """Calculates a sequence."""
+from decimal import Decimal
+import logging
 
-    
+from models import EngineFixture, Flickr
+
+
+class Engine:
+    """Render a lightshow."""
+
+    def __init__(self, flickr: Flickr, apis: dict[str, str]) -> None:
+        self.time: Decimal = Decimal.from_float(0)
+        self.fixtures: dict[str, EngineFixture] = {
+            f.id: EngineFixture(f) for s in flickr.spaces for f in s.fixtures
+        }
+        self.flickr = flickr
+        self.apis = apis
+
+        # Validate fixture APIs
+        for id, f in self.fixtures.items():
+            if f.fixture.api not in self.apis.keys():
+                logging.warning(
+                    f"Fixture API unknown [{f.fixture.api}]. Fixture will be removed. Fixture ID [{f.fixture.id}]. Known APIs [{', '.join([a for a in self.apis.keys()])}]."
+                )
+                del self.fixtures[id]
+
+    def next(self, step_size: Decimal):
+        """Calculate light values for next step in time. Step size in seconds."""
+        prev_time = self.time
+        self.time += step_size
+
+        for s in self.flickr.sequences:
+            for t in s.tracks:
+                # TODO: Calculate new state
+                pass
+
+    def propagate(self):
+        """Forward new fixture states to APIs."""
+        for f in self.fixtures.values():
+            api = self.apis[f.fixture.api]
+            # TODO: Pass update to API

src/models.py

@@ -37,6 +37,12 @@ class Fixture:
     name: str
     """Human readable name."""
 
+    api: str
+    """API this fixture has to be used with."""
+
+    api_id: str
+    """Custom id for specific API."""
+
     capabilities: Capabilities
     """Which dynamic capabilities does the fixture have."""
 
@@ -53,6 +59,29 @@ class Fixture:
     """In range [0,1], how exposed is the light source of the fixture. 0: no exposure. 1: full exposure."""
 
 
+@dataclass
+class EngineFixture:
+    """A fixture for engine use during rendering."""
+
+    fixture: Fixture
+    """Reference meta data for fixture."""
+
+    on: bool = False
+    """On state."""
+
+    bri: float = 0
+    """Brightness state."""
+
+    hue: float = 0
+    """Hue state."""
+
+    sat: float = 0
+    """Saturation state."""
+
+    transition: float = 0
+    """Transition time in seconds."""
+
+
 @dataclass_json
 @dataclass
 class Space:
@@ -67,9 +96,6 @@ class Space:
     fixtures: list[Fixture]
     """All fixtures present in the space."""
 
-    center: SpaceVector
-    """A reference point in the space from which the audience perspective might be assumed."""
-
     version: str = "1"
     """Metatag to track version of datastructure."""
 
@@ -164,6 +190,8 @@ if __name__ == "__main__":
                     Fixture(
                         "98iwd",
                         "Cool Light",
+                        "hue",
+                        "9jsif",
                         Capabilities.BRIGHTNESS,
                         SpaceVector(),
                         SpaceVector(),
@@ -171,7 +199,6 @@ if __name__ == "__main__":
                         0.5,
                     )
                 ],
-                SpaceVector(),
             )
         ],
         [