Implemented ground mech boosting

core/src/mindustry/entities/comp/HitboxComp.java

@@ -0,0 +1,64 @@
+package mindustry.entities.comp;
+
+import arc.func.*;
+import arc.math.geom.QuadTree.*;
+import arc.math.geom.*;
+import mindustry.annotations.Annotations.*;
+import mindustry.gen.*;
+
+@Component
+abstract class HitboxComp implements Posc, QuadTreeObject{
+    @Import float x, y;
+
+    transient float lastX, lastY, hitSize;
+
+    @Override
+    public void update(){
+
+    }
+
+    @Override
+    public void add(){
+        updateLastPosition();
+    }
+
+    @Override
+    public void afterRead(){
+        updateLastPosition();
+    }
+
+    void getCollisions(Cons<QuadTree> consumer){
+
+    }
+
+    void updateLastPosition(){
+        lastX = x;
+        lastY = y;
+    }
+
+    void collision(Hitboxc other, float x, float y){
+
+    }
+
+    float deltaX(){
+        return x - lastX;
+    }
+
+    float deltaY(){
+        return y - lastY;
+    }
+
+    boolean collides(Hitboxc other){
+        return true;
+    }
+
+    @Override
+    public void hitbox(Rect rect){
+        rect.setCentered(x, y, hitSize, hitSize);
+    }
+
+    public void hitboxTile(Rect rect){
+        float scale = 0.66f;
+        rect.setCentered(x, y, hitSize * scale, hitSize * scale);
+    }
+}