Add Input class

- Add Input class used to poll mouse and key button states
- Add additional example systems to the Scene

CopiumEngine/src/copium/example/PlayerControllerSystem.h

@@ -0,0 +1,25 @@
+#pragma once
+
+#include "copium/ecs/System.h"
+#include "copium/event/Input.h"
+#include "copium/example/Components.h"
+
+namespace Copium
+{
+  class PlayerControllerSystem : public System<PlayerC, PhysicsC>
+  {
+  public:
+    void RunEntity(Entity entity, PlayerC& player, PhysicsC& physics) override
+    {
+      float magnitude = 200.0f;
+      glm::vec2 force{0.0f};
+      if (Input::IsKeyDown(CP_KEY_W)) force.y += 1.0f;
+      if (Input::IsKeyDown(CP_KEY_S)) force.y -= 1.0f;
+      if (Input::IsKeyDown(CP_KEY_A)) force.x -= 1.0f;
+      if (Input::IsKeyDown(CP_KEY_D)) force.x += 1.0f;
+
+      glm::normalize(force);
+      physics.force += force * magnitude;
+    }
+  };
+}