Recap: FindNearest

Part of the Game Architecture in Unity section of Coddy's Unity journey. Lesson 45 of 64.

This chapter wrote code that works for any type: extension methods, a generic base class and generic helpers. Here one generic search finds both the gems and the charging pads.

Challenge

Medium

Send the robot to the gems, nearest first, then to charge.

In Helpers.cs, write the static class Helpers with public FindNearest<T>(IEnumerable<T> items, Vector3 from) for components: the nearest item, or null.
In Robot, each frame, MoveTo the nearest Gem and destroy it on arrival.
With no gems left, go to the nearest ChargePad, log Charging once and stay.

Press Play: the robot sweeps up the gems. Then Check.

Try it yourself

using System.Collections.Generic;
using UnityEngine;

// Helpers.FindNearest<T>: the item nearest to a point, or null

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Game Architecture in Unity

2Interfaces in Unity

IDamageable Interfaces and TryGetComponent GetComponents Recap: Interact Key Recap: Nearest in Reach

5ScriptableObjects

Data Assets Weapon Stats Shared Settings Save the Wind Waves as Data Recap: Item Database Recap: Buy from the Shop

8Reusable Code

Extension Methods A Generic Singleton Generic HelpersRecap: FindNearest

11Final Challenges

Tower Defense Lite Crafting Bench Crafting Recipes Boss Fight

3Events

C# Events in Unity Subscribe in OnEnable UnityEvent Fields Events Drive the UI Recap: Achievement Popup Recap: Popup Timer

6Saving with JSON

JsonUtility Save the Game Load and Defaults Recap: Save Slots Pick and Delete a Slot

9Object Pooling

Why Pool Objects A Pool with a Queue Unity's ObjectPool Recap: Bullet Pool

Practice on your own: Unity playground