Brought in Amit's latest and tweaked a few more build options for enabling some safety checks in GCC.

amt/raycaster.hpp

@@ -13,6 +13,7 @@
 #include "amt/pixel.hpp"
 #include "amt/texture.hpp"
 #include <memory>
+#include "thread.hpp"
 
 using Matrix = amt::Matrix<int>;
 
@@ -43,6 +44,9 @@ struct Raycaster {
   std::vector<int> spriteOrder;
   std::vector<double> spriteDistance;
   std::vector<double> ZBuffer; // width
+  float $radius; // std::min($height, $width) / 2;
+  float $r_sq; // = radius * radius;
+  amt::thread_pool_t pool;
 
   Raycaster(sf::RenderWindow& window, Matrix &map, unsigned width, unsigned height);
 
@@ -59,10 +63,11 @@ struct Raycaster {
   void run(double speed, int dir);
   void rotate(double speed, int dir);
   void position_camera(float player_x, float player_y);
+  float get_distance_from_center(int x, int y) const noexcept;
 
   void set_position(int x, int y);
   inline size_t pixcoord(int x, int y) {
     return ((y) * $width) + (x);
   }
 
-};
+};