Add a sprite field to entity.

I did this because I don't see why an entity would not have a sprite.

include/simpleengine/entity.h

@@ -22,13 +22,13 @@ namespace simpleengine {
         friend class Game;
         friend class Event;
     public:
-        Entity() = default;
+        explicit Entity(sf::Sprite& sprite);
         virtual ~Entity() = default;
         Entity(const Entity& entity) = delete;
 
-        virtual void Move(const float& delta_time, const float& dir_x, const float& dir_y) {};
-        virtual void Move(const float& delta_time, const sf::Vector2f& offset) {};
-        virtual void Move(const sf::Vector2f& offset) {};
+        virtual void Move(const float& delta_time, const float& dir_x, const float& dir_y);
+        virtual void Move(const float& delta_time, const sf::Vector2f& offset);
+        virtual void Move(const sf::Vector2f& offset);
 
         virtual void Render(sf::RenderTarget* target);
         virtual void Update(const float& delta_time);
@@ -54,6 +54,7 @@ namespace simpleengine {
         void RenderComponents(sf::RenderTarget* target);
         void AddComponent(std::unique_ptr<Component> component);
     protected:
+        sf::Sprite& sprite;
         std::vector<std::unique_ptr<Component>> components;
         bool destroying = false;
     };

src/entity.cpp

@@ -7,6 +7,22 @@
 #include "entity.h"
 #include "component.h"
 
+simpleengine::Entity::Entity(sf::Sprite &sprite) : sprite(sprite) {
+
+}
+
+void simpleengine::Entity::Move(const float &delta_time, const float &dir_x, const float &dir_y) {
+    sprite.setPosition(dir_x * delta_time, dir_y * delta_time);
+}
+
+void simpleengine::Entity::Move(const float &delta_time, const sf::Vector2f &offset) {
+    sprite.move(offset * delta_time);
+}
+
+void simpleengine::Entity::Move(const sf::Vector2f &offset) {
+    sprite.move(offset);
+}
+
 void simpleengine::Entity::Render(sf::RenderTarget *target) {
     RenderComponents(target);
 }