add test entities prototype

src/objects/Entities.hpp

@@ -0,0 +1,57 @@
+#ifndef OBJECTS_ENTITIES_HPP_
+#define OBJECTS_ENTITIES_HPP_
+
+#include "../typedefs.hpp"
+
+#include <glm/glm.hpp>
+#include <unordered_map>
+#include <entt/entity/registry.hpp>
+
+struct EntityId {
+    entityid_t uid;
+};
+
+struct Transform {
+    glm::vec3 pos;
+    glm::vec3 size;
+    glm::mat3 rot;
+    glm::mat4 combined;
+
+    void refresh();
+};
+
+class Level;
+class Assets;
+class ModelBatch;
+
+class Entity {
+    entt::registry& registry;
+    entt::entity entity;
+public:
+    Entity(entt::registry& registry, entt::entity entity)
+    : registry(registry), entity(entity) {}
+
+    bool isValid() const {
+        return registry.valid(entity);
+    }
+
+    Transform& getTransform() const {
+        return registry.get<Transform>(entity);
+    }
+
+    entityid_t getUID() const {
+        return registry.get<EntityId>(entity).uid;
+    }
+};
+
+class Entities {
+    entt::registry registry;
+    Level* level;
+    std::unordered_map<entityid_t, entt::entity> entities;
+public:
+    Entities(Level* level);
+    void updatePhysics(float delta);
+    void render(Assets* assets, ModelBatch& batch);
+};
+
+#endif // OBJECTS_ENTITIES_HPP_