better collision

src/main/java/core/Master.java

@@ -2,6 +2,7 @@ package core;
 
 import core.math.Vector2D;
 import core.physics.Collidable;
+import core.physics.Collision;
 import objects.DebugPos;
 import objects.ships.BattleShip;
 import objects.GameObject;
@@ -217,21 +218,19 @@ public class Master extends JPanel {
     /**
      * Check whether a collidables collide with another one
      *
-     * @param col The collidable to be checked
+     * @param collidable The collidable to be checked
      * @return True if it collides with something, false if it doesn't - Should return a Collision
      */
-    @Deprecated
-    //TODO make it return a Collision
-    public boolean doesCollide(Collidable col) {
-        boolean collides = false;
+    public Collision doesCollide(Collidable collidable) {
+        Collision collides = null;
 
-        for (Collidable c : collidables) {
-            double distance = Vector2D.distance(c.getCenterPos(), col.getCenterPos());
+        for (Collidable other : collidables) {
+            double distance = Vector2D.distance(other.getCenterPos(), collidable.getCenterPos());
 
-            if (c != col && (distance < c.getHitbox().getSize() + col.getHitbox().getSize())) {
+            if (other != collidable && (distance < other.getHitbox().getSize() + collidable.getHitbox().getSize())) {
 
-                if (c.collidesWith(col)) {
-                    collides = true;
+                if (other.getHitbox().collidesWith(collidable.getHitbox())) {
+                    collides = new Collision(collidable, other);
                 }
             }
         }

src/main/java/core/physics/Collidable.java

@@ -5,7 +5,6 @@ import core.physics.hitboxes.Hitbox;
 
 public interface Collidable {
 
-    boolean collidesWith(Collidable o);
     Hitbox getHitbox();
     Vector2D getCenterPos();
     Vector2D getSize();

src/main/java/core/physics/Collision.java

@@ -5,15 +5,12 @@ package core.physics;
  */
 public class Collision {
 
-    Collidable a;
-    Collidable b;
+    private final Collidable a;
+    private final Collidable b;
 
-    boolean haveCollided;
-
-    public Collision(Collidable a, Collidable b, boolean haveCollided) {
+    public Collision(Collidable a, Collidable b) {
         this.a = a;
         this.b = b;
-        this.haveCollided = haveCollided;
     }
 
     /**
@@ -31,8 +28,4 @@ public class Collision {
     public Collidable getB() {
         return b;
     }
-
-    public boolean isHaveCollided() {
-        return haveCollided;
-    }
 }

src/main/java/core/physics/hitboxes/Hitbox.java

@@ -2,6 +2,7 @@ package core.physics.hitboxes;
 
 import core.Drawable;
 import core.math.Vector2D;
+import core.physics.Collision;
 
 public abstract class Hitbox implements Drawable {
 
@@ -15,6 +16,8 @@ public abstract class Hitbox implements Drawable {
 
     public abstract double getSize();
 
+    public abstract boolean collidesWith(Hitbox other);
+
     @Override
     public String toString() {
         return super.toString();

src/main/java/objects/GameObject.java

@@ -58,7 +58,7 @@ public abstract class GameObject implements Drawable {
 
         if (this instanceof Collidable) {
             ((Collidable) this).getHitbox().moveTo(position, size);
-            if (master.doesCollide((Collidable) this)) {
+            if (master.doesCollide((Collidable) this) != null) {
                 this.position = oldPos;
                 ((Collidable) this).getHitbox().moveTo(oldPos, size);
             }

src/main/java/objects/ships/Submarine.java

@@ -33,11 +33,6 @@ public class Submarine extends GameObject implements Collidable {
         moveTo(centerRelPos);
     }
 
-    @Override
-    public boolean collidesWith(Collidable o) {
-        return hitbox.collidesWith(o.getHitbox());
-    }
-
     @Override
     public Hitbox getHitbox() {
         return hitbox;

src/main/java/objects/world/Wall.java

@@ -26,11 +26,6 @@ public class Wall extends GameObject implements Collidable {
     public void update() {
     }
 
-    @Override
-    public boolean collidesWith(Collidable o) {
-        return this.hitbox.collidesWith(o.getHitbox());
-    }
-
     @Override
     public Hitbox getHitbox() {
         return hitbox;