add layers and glad

sandbox/src/Application.cpp

@@ -1,11 +1,30 @@
 #include <memory>
 #include <quark.hpp>
 
+class ExampleLayer :
+	public qk::Layer
+{
+public:
+	ExampleLayer() :
+		Layer("Example")
+	{ }
+
+	void OnUpdate() override {
+		QK_TRACE("ExampleLayer::Update");
+	}
+
+	void OnEvent(qk::Event& event) override {
+		QK_TRACE(event);
+	}
+};
+
 class Sandbox :
 	public qk::Application
 {
 public:
-	
+	Sandbox() {
+		PushLayer(new ExampleLayer);
+	}
 };
 
 std::unique_ptr<qk::Application> qk::CreateApplication() {