[WIP] Fix GameObject::AbsoluteTransform

main.cpp

@@ -2,13 +2,72 @@
 
 using namespace spic;
 
+class TestScript : public spic::BehaviourScript
+{
+    public:
+        void OnStart() override
+        {
+        }
+
+        void OnUpdate() override
+        {
+            auto rotation = 25.0;
+            auto tickRotation = rotation * Time::DeltaTime() * Time::TimeScale();
+
+            if (Input::GetKey(spic::Input::KeyCode::E))
+            {
+                GameObject().lock()->Transform().rotation += tickRotation;
+            }
+            if (Input::GetKey(spic::Input::KeyCode::Q))
+            {
+                GameObject().lock()->Transform().rotation -= tickRotation;
+            }
+        }
+
+        void OnTriggerEnter2D(const Collider& collider) override
+        {
+            BehaviourScript::OnTriggerEnter2D(collider);
+        }
+
+        void OnTriggerExit2D(const Collider& collider) override
+        {
+            BehaviourScript::OnTriggerExit2D(collider);
+        }
+
+        void OnTriggerStay2D(const Collider& collider) override
+        {
+            BehaviourScript::OnTriggerStay2D(collider);
+        }
+};
+
 int main(int argc, char* args[])
 {
     Engine& engine = Engine::Instance();
     EngineConfig engineConfig{WindowConfig{"Engine Test Window", 1366, 768, false}};
     engine.Init(engineConfig);
 
     auto scene = std::make_shared<Scene>();
+
+    auto parentObj = std::make_shared<spic::GameObject>("parent", "parent", 5);
+    parentObj->Transform().position.x = 200;
+    parentObj->Transform().position.y = 200;
+    auto parentScript = std::make_shared<TestScript>();
+    parentScript->GameObject(parentObj);
+    parentObj->AddComponent(parentScript);
+    auto parentSprite = std::make_shared<spic::Sprite>("resources/hero.png", false, false, 1, 1);
+    parentSprite->GameObject(parentObj);
+    parentObj->AddComponent(parentSprite);
+
+    auto childObj = std::make_shared<spic::GameObject>("child", "child", 5);
+    childObj->Transform().position.x = 200;
+    childObj->Parent(parentObj);
+    parentObj->AddChild(childObj);
+    auto childSprite = std::make_shared<spic::Sprite>("resources/hero.png", false, false, 1, 1);
+    childSprite->GameObject(childObj);
+    childObj->AddComponent(childSprite);
+
+    scene->Contents().push_back(parentObj);
+
     engine.PushScene(scene);
     engine.Start();
 

src/Api/GameObject.cpp

@@ -198,21 +198,32 @@ int GameObject::Layer() const
 
 spic::Transform GameObject::AbsoluteTransform() const
 {
-    const GameObject* object = this;
-    spic::Transform transform{object->Transform()};
+    std::vector<spic::Transform> transforms{};
+    auto parent = Parent();
 
-    while (!object->Parent().expired())
+    if (parent.expired()) return Transform();
+
+    while (!parent.expired())
+    {
+        auto wParent = parent.lock();
+        transforms.push_back(wParent->Transform());
+        parent = wParent->Parent();
+    }
+    transforms.push_back(Transform());
+
+    spic::Transform absTransform{{0, 0}, 0, 1};
+
+    for (const auto& transform: transforms)
     {
-        object = object->Parent().lock().get();
-        transform.position.x += object->Transform().position.x;
-        transform.position.y += object->Transform().position.y;
-//        transform.rotation += object->Transform().rotation;
-        transform.scale *= object->Transform().scale;
+        absTransform.position.x += transform.position.x;
+        absTransform.position.y += transform.position.y;
+        absTransform.rotation += transform.rotation;
+        absTransform.scale *= transform.scale;
     }
 
-    transform.rotation = std::fmod(transform.rotation, 360);
+    absTransform.rotation = fmod(absTransform.rotation, 360);
 
-    return transform;
+    return absTransform;
 }
 
 void GameObject::RemoveComponent(std::shared_ptr<Component> component)