add hero walk graphics, objects atlas packing and refactor components to be records

core/src/main/java/io/github/com/quillraven/component/Graphic.java

@@ -9,9 +9,9 @@ import com.badlogic.gdx.graphics.g2d.TextureRegion;
  * Component that stores the visual representation of an entity.
  * Contains a texture region and a color for tinting.
  */
-public class Graphic implements Component {
+public record Graphic(
+    TextureRegion region,
+    Color color
+) implements Component {
     public static final ComponentMapper<Graphic> MAPPER = ComponentMapper.getFor(Graphic.class);
-
-    public TextureRegion region;
-    public final Color color = new Color(Color.WHITE);
 }

core/src/main/java/io/github/com/quillraven/component/Transform.java

@@ -8,13 +8,13 @@ import com.badlogic.gdx.math.Vector2;
  * Component that stores the position, z-index, and size of an entity.
  * Implements Comparable to allow sorting entities by z-index and position.
  */
-public class Transform implements Component, Comparable<Transform> {
+public record Transform(
+    Vector2 position,
+    int z,
+    Vector2 size
+) implements Component, Comparable<Transform> {
     public static final ComponentMapper<Transform> MAPPER = ComponentMapper.getFor(Transform.class);
 
-    public final Vector2 position = new Vector2();
-    public int z = 0;
-    public final Vector2 size = new Vector2(1f, 1f);
-
     @Override
     public int compareTo(Transform other) {
         if (this.z != other.z) {

core/src/main/java/io/github/com/quillraven/system/RenderSystem.java

@@ -74,16 +74,16 @@ public class RenderSystem extends SortedIteratingSystem implements Disposable {
     protected void processEntity(Entity entity, float deltaTime) {
         Transform transform = Transform.MAPPER.get(entity);
         Graphic graphic = Graphic.MAPPER.get(entity);
-        if (graphic.region == null) {
+        if (graphic.region() == null) {
             return;
         }
 
-        batch.setColor(graphic.color);
+        batch.setColor(graphic.color());
         batch.draw(
-            graphic.region,
-            transform.position.x, transform.position.y,
-            transform.size.x / 2, transform.size.y / 2,
-            transform.size.x, transform.size.y,
+            graphic.region(),
+            transform.position().x, transform.position().y,
+            transform.size().x / 2, transform.size().y / 2,
+            transform.size().x, transform.size().y,
             1, 1,
             0
         );