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Gems on Screen

Part of the Building Real Games section of Coddy's Unity journey. Lesson 54 of 60.

challenge icon

Challenge

Medium

Count the five gems as the player collects them.

  1. In Player, add using TMPro; and [SerializeField] private TMP_Text gemText;.
  2. In Start(), count the objects tagged Gem and show Gems: 0/5.
  3. Add public void AddGem(): one more gem, shown as Gems: 1/5.
  4. In Gem, when a Player enters, call its AddGem() and destroy the gem.

Press Play and collect gems. Then Check.

Try it yourself

using UnityEngine;

public class Gem : MonoBehaviour
{
    // A later lesson fills this in: a gem to collect.
}

All lessons in Building Real Games

1On-Screen Text

Canvas and TextShow the ScoreFormat NumbersA Countdown TimerRecap: Speedometer

4Scenes and Levels

Load a SceneRestart the LevelNext LevelKeep Between ScenesRecap: Level Select

7Time Control

Pause with timeScaleSlow MotionUnscaled TimeRecap: Bullet Time

10Project: 3D Platformer

The CourseMoving PlatformsProject lessonRide the PlatformProject lessonFall and RespawnProject lessonReach a CheckpointProject lessonGems on ScreenProject lessonFinish LineProject lessonBest TimeProject lesson

2Buttons and Screens

Buttons and onClickLambdasWiring in the InspectorPanels On and OffHealth BarsRecap: Upgrade Shop

5Saving with PlayerPrefs

Save a NumberLoad with a DefaultHigh ScoreSave SettingsRecap: Coins in the Bank

8Character Controller

CharacterController.MoveGravity by HandJumpingPushing ThingsMove Where You LookRecap: Double Jump

11Final Challenges

Shop and InventoryTime TrialSurvival NightThe End of the Night

3The Game Manager

One Script Runs the GameThe SingletonGame StatesSwitching on the StateRecap: Round Manager

6Project: Endless Runner

Three LanesObstacles AheadProject lessonSpeeding UpProject lessonScore on ScreenProject lessonCrash Ends the RunProject lessonRun AgainProject lessonBest RunProject lesson

9The New Input System

Two Input SystemsKeyboard and MousePressed This FrameInput ActionsRecap: Input Swap

Practice on your own: Unity playground