Make backend configurable

README.md

@@ -0,0 +1,26 @@
+# followspot-psn
+
+Solution for controlling followspots, and sending the position data to ma3 over
+[posistagenet (PSN)](https://posistage.net/). It uses
+[psn-py](https://github.com/vyv/psn-py) to do PSN stuff.
+
+### Deployment
+
+**TLDR**: `docker compose up --build` on a Linux machine.
+
+> [!NOTE]
+> Why Linux? This is because PSN uses multicast to transmit positional data to
+> ma3. On linux this is done using host networking driver. However the host
+> networking driver on macOS or windows will only allow broadcasting on the
+> docker linux VM. It could probably be done using some fancy routing/bridge
+> setup with the docker VM.
+
+This opens a webserver on port 8000 where you can control the PSN trackers. PSN
+data is multicasted on `236.10.10.10:56565`. Tracker positions can also be
+updated using OSC, by default OSC listens on port 9000. The OSC endpoint expects
+data on `/Tracker/{trackerid}` with three floats specifying x, y and z value.
+
+Currently all configuration is done in the source files, most notably in
+[psn_server.py](backend/psn_server.py).
+
+The rest of the functionality is documented in the code.

backend/psn_server.py

@@ -1,22 +1,26 @@
 import asyncio
 import json
 import logging
+import os
 import socket
 import time
 import weakref
 from dataclasses import dataclass
 
 import psn
-from pythonosc.osc_server import AsyncIOOSCUDPServer
+from aiohttp import WSCloseCode, web
 from pythonosc.dispatcher import Dispatcher
-from aiohttp import web, WSCloseCode
+from pythonosc.osc_server import AsyncIOOSCUDPServer
 
-PSN_DEFAULT_UDP_PORT = 56565
+PSN_DEFAULT_UDP_PORT = os.getenv("PSN_DEFAULT_UDP_PORT", 56565)
-PSN_DEFAULT_UDP_MCAST_ADDRESS = "236.10.10.10"
+PSN_DEFAULT_UDP_MCAST_ADDRESS = os.getenv(
-WEB_SERVER_PORT = 8000
+    "PSN_DEFAULT_UDP_MCAST_ADDRESS", "236.10.10.10"
+)
+WEB_SERVER_PORT = int(os.getenv("WEB_SERVER_PORT", 8000))
 IP = "0.0.0.0"
-OSC_SERVER_PORT = 6969
+OSC_SERVER_PORT = int(os.getenv("OSC_SERVER_PORT", 9000))
-NUM_TRACKERS = 3
+NUM_TRACKERS = int(os.getenv("NUM_TRACKERS", 3))
+
 
 class SceneDimensions:
     x_min: float
@@ -30,7 +34,7 @@ class SceneDimensions:
 
     dimension_map = {
         "scene_only": (-13 / 2, 13 / 2, 0, 6.3, 0, 4),
-        "full_arena": (-13 / 2, 13 / 2, -9.7, 6.3 , 0, 4)
+        "full_arena": (-13 / 2, 13 / 2, -9.7, 6.3, 0, 4),
     }
 
     def __init__(self):
@@ -53,10 +57,12 @@ class SceneDimensions:
         self.dimension_name = "full_arena"
 
 
-
 START_POSITION_INTERNAL = (0.5, 0.5, 2)
 
-def map_range(value: float, in_min: float, in_max: float, out_min: float, out_max: float) -> float:
+
+def map_range(
+    value: float, in_min: float, in_max: float, out_min: float, out_max: float
+) -> float:
     return (value - in_min) * (out_max - out_min) / (in_max - in_min) + out_min
 
 
@@ -69,7 +75,9 @@ class TrackerData:
     z: float
 
     @staticmethod
-    def internal_to_scene_coords_3d(x: float, y: float, z: float, dim: SceneDimensions) -> tuple[float, float, float]:
+    def internal_to_scene_coords_3d(
+        x: float, y: float, z: float, dim: SceneDimensions
+    ) -> tuple[float, float, float]:
         """
         Convert internal coordinates to scene coordinates
 
@@ -83,7 +91,9 @@ class TrackerData:
         return x_val, y_val, z_val
 
     @staticmethod
-    def scene_to_internal_coords_3d(x: float, y: float, z: float, dim: SceneDimensions) -> tuple[float, float, float]:
+    def scene_to_internal_coords_3d(
+        x: float, y: float, z: float, dim: SceneDimensions
+    ) -> tuple[float, float, float]:
         x_val = map_range(x, dim.x_min, dim.x_max, 0, 1)
         y_val = map_range(y, dim.y_max, dim.y_min, 0, 1)  # Invert y axis
         z_val = z
@@ -117,20 +127,25 @@ def get_elapsed_time_ms():
     return get_time_ms() - START_TIME
 
 
-async def update_all_other_clients(app: web.Application, ws: web.WebSocketResponse = None):
+async def update_all_other_clients(
+    app: web.Application, ws: web.WebSocketResponse = None
+):
     for ws_send in app["ws_clients"]:
         if ws_send == ws:
             continue
         await ws_send.send_str(trackers_to_json(app))
 
+
 async def update_all_clients(app: web.Application):
     for ws in app["ws_clients"]:
         await ws.send_str(trackers_to_json(app))
 
+
 async def update_all_clients_bg(app: web.Application):
     for ws in app["ws_clients"]:
         await ws.send_str(json.dumps({"refresh": True}))
 
+
 async def handle_websocket(request):
     ws = web.WebSocketResponse()
     logging.debug("Websocket connection starting")
@@ -161,6 +176,7 @@ async def handle_websocket(request):
 
     return ws
 
+
 async def on_shutdown(app):
     for ws in set(app["ws_clients"]):
         await ws.close(code=WSCloseCode.GOING_AWAY, message="Server shutdown")
@@ -169,6 +185,7 @@ async def on_shutdown(app):
 async def handle_root(request):
     return web.FileResponse("./static/index.html")
 
+
 async def handle_background_image(request):
     if request.app["scene_dimensions"].dimension_name == "full_arena":
         return web.FileResponse("./static/scene_and_crowd.png")
@@ -176,6 +193,7 @@ async def handle_background_image(request):
         return web.FileResponse("./static/scene_only.png")
     return web.Response(text="Incorrect server scende dimension state", status=500)
 
+
 async def handle_set_mode(request):
     try:
         data = request.data = await request.json()
@@ -193,6 +211,7 @@ async def handle_set_mode(request):
     except Exception as e:
         return web.Response(text=f"Error: {e}", status=400)
 
+
 async def handlet_get_mode(request):
     return web.json_response({"mode": request.app["scene_dimensions"].dimension_name})
 
@@ -232,7 +251,9 @@ def osc_tracker_updater(address, fixed_args, *args) -> None:
 async def receive_osc_data(app):
     dispatcher = Dispatcher()
     dispatcher.map("/Tracker*", osc_tracker_updater, app)
-    server = AsyncIOOSCUDPServer((IP, OSC_SERVER_PORT), dispatcher, asyncio.get_event_loop())
+    server = AsyncIOOSCUDPServer(
+        (IP, OSC_SERVER_PORT), dispatcher, asyncio.get_event_loop()
+    )
     transport, protocol = await server.create_serve_endpoint()
     app["osc_transport"] = transport
     yield

compose.yaml

@@ -2,3 +2,9 @@ services:
   followspot-psn:
     build: .
     network_mode: host
+    environment:
+      PSN_DEFAULT_UDP_PORT: 56565
+      PSN_DEFAULT_UDP_MCAST_ADDRESS: "236.10.10.10"
+      WEB_SERVER_PORT: 8000
+      OSC_SERVER_PORT: 9000
+      NUM_TRACKERS: 3

frontend/src/components/Container.svelte

@@ -63,6 +63,8 @@
     width = image?.getBoundingClientRect().width ?? 0;
     height = image?.getBoundingClientRect().height ?? 0;
   });
+
+
 </script>
 
 <svelte:window onresize={resize} />

frontend/src/components/Modal.svelte

@@ -1,10 +1,38 @@
 <script lang="ts">
   type Props = {
-    open: boolean;
+    action: () => void;
-    onClose: () => void;
+  };
+
+  let { action }: Props = $props();
+
+  let dialog: HTMLDialogElement;
+  const openModal = () => {
+    dialog.showModal();
   };
 </script>
 
-<dialog>
+<button class="mb-24 rounded-md bg-red-400 p-2" onclick={openModal}>
-  <div></div>
+  Change mode
+</button>
+
+<dialog
+  open={false}
+  bind:this={dialog}
+  class="absolute left-0 top-0 z-50 m-0 h-full max-h-full w-full max-w-full p-0 open:bg-black/80"
+>
+  <div class="flex h-full w-full flex-col items-center justify-center">
+    <h1 class="text-red-600 text-8xl">THIS GONNA FUCK THINGS UP</h1>
+    <div class="flex  items-center justify-center gap-6">
+      <button class="rounded-md bg-gray-400 p-4" onclick={() => dialog.close()}
+        >Close</button
+      >
+      <button
+        class="rounded-md bg-red-400 p-4"
+        onclick={() => {
+          action();
+          dialog.close();
+        }}>Change mode</button
+      >
+    </div>
+  </div>
 </dialog>

frontend/src/components/Slider.svelte

@@ -1,6 +1,5 @@
 <script lang="ts">
   import type { TrackerData } from "$lib/utils/types";
-  import { onMount } from "svelte";
   import Modal from "./Modal.svelte";
 
   type Props = {
@@ -56,10 +55,8 @@
   let z_viz = $derived(trackers[selected].z.toFixed(2));
 </script>
 
-<Modal />
 <div class="slider-container ml-auto">
-  <button class="bg-red-400 rounded-md p-2 mb-24"
+  <Modal action={buttonAction} />
-    onclick={buttonAction}>Change mode</button>
   <input
     type="range"
     id="z"