add triggers

src/physics/Hitbox.hpp

@@ -1,8 +1,24 @@
 #ifndef PHYSICS_HITBOX_HPP_
 #define PHYSICS_HITBOX_HPP_
 
+#include "../maths/aabb.hpp"
+#include "../typedefs.hpp"
+
+#include <set>
+#include <functional>
 #include <glm/glm.hpp>
 
+struct Trigger {
+    bool enabled = true;
+    entityid_t entity;
+    AABB aabb;
+    AABB calculated;
+    std::set<entityid_t> prevEntered;
+    std::set<entityid_t> nextEntered;
+    std::function<void(entityid_t, size_t, entityid_t)> enterCallback;
+    std::function<void(entityid_t, size_t, entityid_t)> exitCallback;
+};
+
 struct Hitbox {
     glm::vec3 position;
     glm::vec3 halfsize;