feat: basic ecs start + renderer class

include/renderer/renderer.h

@@ -0,0 +1,28 @@
+#ifndef RENDERER_H_
+#define RENDERER_H_
+
+#include <glm/glm.hpp>
+#include "renderer/shader.h"
+#include "ecs/entity.h"
+
+// TODO: make static or singleton
+class Renderer {
+public:
+    Renderer(ecs::Entity& light, ecs::Entity& camera);
+
+    void RenderLight();
+    void RenderEntity(const ecs::Entity& entity);
+
+    void OnWindowResized(int w, int h);
+private:
+    Shader m_shader;
+
+    glm::mat4 m_model;
+    glm::mat4 m_proj;
+    glm::mat4 m_view;
+
+    ecs::Entity& m_light;
+    ecs::Entity& m_camera;
+};
+
+#endif // RENDERER_H_