add entity library

src/objects/Entities.cpp

@@ -20,16 +20,16 @@ void Transform::refresh() {
 Entities::Entities(Level* level) : level(level) {
 }
 
-void Entities::drop(glm::vec3 pos, glm::vec3 vel) {
+entityid_t Entities::drop(glm::vec3 pos) {
     auto entity = registry.create();
     glm::vec3 size(1);
-    registry.emplace<EntityId>(entity, static_cast<entityid_t>(1));
+    auto id = nextID++;
+    registry.emplace<EntityId>(entity, static_cast<entityid_t>(id));
     registry.emplace<Transform>(entity, pos, size/4.0f, glm::mat3(1.0f));
     registry.emplace<Hitbox>(entity, pos, 
         glm::vec3(size.x*0.2f, size.y*0.5f, size.z*0.2f));
-
-    auto& hitbox = registry.get<Hitbox>(entity);
-    hitbox.velocity = vel;
+    entities[id] = entity;
+    return id;
 }
 
 void Entities::updatePhysics(float delta){