bug fixes

src/hal/hal_linux.cpp

@@ -96,7 +96,7 @@ void start_frame() {
   SDL_RenderClear(main_sdl_session.renderer);
 }
 
-const Uint64 frame_delay_ns = 1000000000ULL / 1;
+constexpr Uint64 frame_delay_ns = 1000000000ULL / 1;
 void end_frame() {
   SDL_Event event;
   while (SDL_PollEvent(&event)) {
@@ -109,7 +109,7 @@ void end_frame() {
       if (event.key.key != SDLK_Q) {
         break;
       }
-
+      [[fallthrough]];
     case SDL_EVENT_QUIT:
       SDL_Quit();
       std::exit(0);
@@ -164,7 +164,6 @@ void circle(const uint16_t x_center, const uint16_t y_center,
     SDL_RenderPoint(main_sdl_session.renderer, x + x_center, -y + y_center);
     SDL_RenderPoint(main_sdl_session.renderer, y + x_center, x + y_center);
     SDL_RenderPoint(main_sdl_session.renderer, -y + x_center, x + y_center);
-    std::cout << "\n";
   }
 
   // Initialising the value of P
@@ -227,8 +226,11 @@ void line(const uint16_t x1, const uint16_t y1, const uint16_t x2,
 void arc(uint16_t start_x, uint16_t start_y, float start_angle_rad, float speed /*in pps*/,float angular_speed_rads, uint16_t duration, color_t color) {
   SDL_SetRenderDrawColor(main_sdl_session.renderer, color.r, color.g, color.b,
                          0xff);
-  constexpr float DEG2RAD = std::numbers::pi / 180.0f;
 
+    if (speed == 0) {
+      SDL_RenderPoint(main_sdl_session.renderer, start_x, start_y);
+      return;
+    }
 
     // Handle straight line case
     if (std::fabs(angular_speed_rads) < 1e-6f) {