AUTOSCALE!

src/main.cpp

@@ -1,27 +1,31 @@
 #include "../res/station.h"
 #include "core/color.h"
 #include "core/config.hpp"
-#include "core/const.hpp"
 #include "core/units.hpp"
 #include "hal/draw.hpp"
 #include "hal/hal.hpp"
 #include "hal/net.hpp"
 #include "nlohmann/json_fwd.hpp"
 #include <cstdint>
-#include <cstdio>
 #include <format>
 #include <iostream>
 #include "core/global.hpp"
 #include "core/geo.hpp"
 #include "core/gfx.hpp"
 
+#ifdef AUTOSCALE
+uint16_t max_range = 500;
+#endif
+
 int main() {
   if (hal::init() != 0) {
     return 1;
   }
   const auto [screen_w, screen_h] = hal::get_screen_size();
-
-  const float pixels_per_km =
+  #ifndef AUTOSCALE
+  const
+  #endif
+  float pixels_per_km =
       static_cast<float>(screen_h > screen_w ? screen_w : screen_h) /
       (max_range * 2);
   bool odd_even = true;
@@ -74,6 +78,12 @@ int main() {
       }
     }
 
+    #ifdef AUTOSCALE
+    {
+      // fardest aircraft in km
+      uint16_t fardest_aircraft_distance_linear = 0;
+    #endif
+
     { // draw planes
       nlohmann::json aircraft = net::http_get_json(std::format("{}/aircraft.json", base_url));
       if (aircraft!= nullptr) {
@@ -96,6 +106,14 @@ int main() {
           draw::color_t color= get_altitude_color(altitude);
           try {
           const auto [x_offset,y_offset] = get_offset_from_station(craft["lat"].get<double>(), craft["lon"].get<double>());
+          #ifdef AUTOSCALE
+          if(std::abs(x_offset)/1000 > fardest_aircraft_distance_linear) {
+            fardest_aircraft_distance_linear = std::abs(x_offset)/1000;
+          } 
+          if(std::abs(y_offset)/1000 > fardest_aircraft_distance_linear) {
+            fardest_aircraft_distance_linear = std::abs(y_offset)/1000;
+          } 
+          #endif
           const uint16_t x_center = middle_x+((x_offset/1000)*pixels_per_km);
           const uint16_t y_center = middle_y+((y_offset/1000)*pixels_per_km);
           draw::pixel(x_center, y_center, color);
@@ -110,6 +128,20 @@ int main() {
         std::cerr << RED"[ERROR]" RESET " failed to get aircraft\n";
       }
     }
+        #ifdef AUTOSCALE
+        if (fardest_aircraft_distance_linear > 0) {
+          for(uint16_t i = first_ring_distance; i < UINT16_MAX; i*=2) {
+            if (i+(range_padding/2) >= fardest_aircraft_distance_linear) {
+              max_range = i+range_padding;
+              pixels_per_km =
+      static_cast<float>(screen_h > screen_w ? screen_w : screen_h) /
+      (max_range * 2);
+      break;
+            } 
+          }
+        }
+  }
+    #endif
 
     hal::end_frame();
   }