#include <config.h>
#include <iostream>
-#include "collision_grid.h"
-#include "collision.h"
-#include "sector.h"
-#include "collision_grid_iterator.h"
+#include "collision_grid.hpp"
+#include "collision.hpp"
+#include "sector.hpp"
+#include "collision_grid_iterator.hpp"
static const float DELTA = .001;