Raycaster now keeps track of the square we are aimed but _does not_ know what is there, that's the job of other things like MainUI. Closes #50.

raycaster.cpp

@@ -204,7 +204,7 @@ void Raycaster::sprite_casting(sf::RenderTarget &target) {
         apply_sprite_effect(effect, sprite_width, sprite_height);
       } else {
         effect = $brightness;
-        level += (aiming_at == rec.second) * 0.1;
+        level += (aiming_at == sprite_pos.location) * AIMED_AT_BRIGHTNESS;
         effect->setUniform("darkness", level);
       }
 
@@ -475,6 +475,8 @@ bool Raycaster::play_rotate() {
   $plane_x = std::lerp($plane_x, $camera.target_plane_x, $camera.t);
   $plane_y = std::lerp($plane_y, $camera.target_plane_y, $camera.t);
 
+  aiming_at = { size_t($pos_x + $dir_x), size_t($pos_y + $dir_y) };
+
   return $camera.t >= 1.0;
 }
 
@@ -482,19 +484,21 @@ bool Raycaster::play_move() {
   $camera.t += $camera.move_speed;
   $pos_x = std::lerp($pos_x, $camera.target_x, $camera.t);
   $pos_y = std::lerp($pos_y, $camera.target_y, $camera.t);
+
+  aiming_at = { size_t($pos_x + $dir_x), size_t($pos_y + $dir_y) };
+
   return $camera.t >= 1.0;
 }
 
 void Raycaster::abort_plan() {
   $camera.target_x = $pos_x;
   $camera.target_y = $pos_y;
+  aiming_at = { size_t($pos_x + $dir_x), size_t($pos_y + $dir_y) };
 }
 
-Point Raycaster::aimed_at() {
-  return {
-    size_t($pos_x + $dir_x),
-    size_t($pos_y + $dir_y)
-  };
+bool Raycaster::is_target(DinkyECS::Entity entity) {
+  (void)entity;
+  return false;
 }
 
 Point Raycaster::camera_target() {