add noc eventmap conversion config

src/c3nav/mapdata/nocutils.py

@@ -0,0 +1,51 @@
+import math
+from functools import cached_property
+
+import numpy as np
+from pydantic.main import BaseModel
+from pydantic.type_adapter import TypeAdapter
+from shapely import Point
+
+
+def deg2pos(lat_deg, lon_deg):
+    lat_rad = math.radians(lat_deg)
+    xpos = (lon_deg + 180.0) / 360.0
+    ypos = math.asinh(math.tan(lat_rad)) / math.pi / 2.0
+    return ypos, xpos
+
+
+class NocTransformLayerSchema(BaseModel):
+    level_id: int
+    scale: float | int
+    offset: tuple[float, float] | int
+
+    def convert(self, lat, lng) -> Point:
+        return np.array(deg2pos(lat, lng)) * self.scale + np.array(self.offset)
+
+
+class NocTwoPointLayerSchema(BaseModel):
+    level_id: int
+    latlng1_noc: tuple[float, float]
+    latlng1_nav: tuple[float, float]
+    latlng2_noc: tuple[float, float]
+    latlng2_nav: tuple[float, float]
+
+    @cached_property
+    def to_transform(self) -> NocTransformLayerSchema:
+        diff_noc = np.array(deg2pos(*self.latlng1_noc)) - np.array(deg2pos(*self.latlng2_noc))
+        print(diff_noc)
+        diff_nav = np.array(self.latlng1_nav) - np.array(self.latlng2_nav)
+        print(diff_nav)
+        scale = np.linalg.norm(diff_nav) / np.linalg.norm(diff_noc)
+        offset = np.array(self.latlng1_nav) - (np.array(deg2pos(*self.latlng1_noc)) * scale)
+        return NocTransformLayerSchema(
+            level_id=self.level_id,
+            scale=scale,
+            offset=tuple(offset),
+        )
+
+    def convert(self, lat, lng) -> Point:
+        return self.to_transform.convert(lat, lng)
+
+
+NocLayersSchema = TypeAdapter(dict[str, NocTransformLayerSchema | NocTwoPointLayerSchema])