Lab 5 - 2D Roguelike: Game

This assignment is due on Friday 5/18.

Continue off of Lab 4 for this assignment.

This lab assignment is a bit larger than previous labs because there’s not really a good stopping point near the middle. It will count for 1.5x the typical lab points. Make sure to give enough time to complete it.

In this lab we will be completing the second two-thirds or so of the 2D Roguelike tutorial.

For Lab 5 we will complete these parts:

There is a lot going on in these videos so it will most likely be necessary to compelte the lab by playing the videos and following along.

I will outline as much as I can, but mostly just to give an overview and maybe so that more experienced Unity developers can skip some parts of the videos.

Moving Object Script

Write an abstract class for moving objects

Creating Destructible Walls

Write the destructible wall script
Select all 8 Wall prefabs and add the newly created Wall script to all of them
Add the DmgSprite for each prefab using the damaged tiles in the tileset.
- There are only 7 wall destruction tiles yet we have 8 prefabs
- Use the 5th tile for both Wall5 and Wall6

Player Animator Controller

Add the Player prefab back to the hierarchy
Open the Player AnimationController
Open the Parameters tab and add a parameter of type Trigger called playerChop
Add “to” and “from” transitions between PlayerIdle and PlayerHit and between PlayerIdle and PlayerChop
On the transition to PlayerChop, disable Has Exit Time and set Transition Offset to 0
- Also add the trigger playerChop
On the transition from PlayerChop back to PlayerIdle, set Exit Duration to 1 and Transition Offset to 0
Repeat the above two steps for the PlayerHit transitions

Test that the above worked by:
- Docking the Animation tab on the bottom of the editor
- Playing the game
- Clicking on each trigger in the Parameters list to manually trigger it
- The respective animations should play

Writing the Player Script

Open the GameManger script
- Add a field public int playerFoodPoints initialized to 100
- Add a field [HideInInspector] public bool playersTurn initialized to true
- Add a method public void GameOver() that simply sets enabled to false
Create and implement a Player script component
- Note that instead of Application.LoadLevel(Application.LoadedLevel);, you should call SceneManager.LoadScene (0);
- You’ll need to add using UnityEngine.SceneManagement; at the top of the file
- Add to the Player prefab
- Set the script Blocking Layer to BlockingLayer

Writing the Enemy Script

Create and implement an Enemy script component

Enemy Animator Controller

Open the Enemy AnimationController
Open the Parameters tab and add a parameter of type Trigger called enemyAttack
Add “to” and “from” transitions between Enemy1Idle and Enemy1Attack
On the transition to Enemy1Attack, disable Has Exit Time and set Transition Offset to 0
- Also add the trigger enemyAttack
On the transition from Enemy1Attack back to Enemy1Idle, set Exit Duration to 1 and Transition Offset to 0
You can test the Enemy AnimationController in the same way we tested the Player AnimationController

Open the GameManager script component
- Add an enemy list and implement enemy movement

Open the Enemy script
- in the Start() method, call the GameManager method AddEnemyToList()
- In the OnCantMove() method, call animator.SetTrigger("enemyAttack");
Add the Enemy script to both enemy prefabs
- Set the script Blocking Layer to BlockingLayer
- Set the Player Damage of Enemy1 to 10
- Set the Player Damage of Enemy2 to 20

Adding UI & Level Transitions

Create a UI → Canvas
Create a UI → Image
- Set the Anchor (including position, holding Alt or Option) to stretch-stretch
- Set the Color to black
Create a UI → Text and rename it to LevelText
- Set the Anchor (including position, holding Alt or Option) to center-center
- Set Font to PressStart2P-Regular
- Set Font Size to 32
- Set both Alignment modes to middle
- Set Horizontal and Vertical Overflow to Overflow
- Set Color to white
- Set Text to Day 1
Copy the LevelText object and name the copy FoodText
- Set the Anchor (including position, holding Alt or Option) to bottom-center
- Set the Anchor Min Y to 0.05
- Set the Anchor Max Y to 0.05
- Set the Pos Y to 0
- Set Font Size to 24
- Set the Text to Food 100
Move the FoodText above LevelImage in the list, and make LevelText a child of LevelImage

Implement level loading and UI in the GameManager script
- Note that with the current version of Unity, the OnLevelWasLoaded method will no longer work Instead, follow these steps:
- Add using UnityEngine.UI; to the top of the file
- Remove the InitGame(); call from Awake()
- Set the initial value of level to 0
- Add the following three methods:

// This is called each time a scene is loaded.
void OnLevelFinishedLoading(Scene scene, LoadSceneMode mode)
{
    // Add one to our level number.
    level++;

    // Call InitGame to initialize our level.
    InitGame();
}

void OnEnable()
{
    // Tell our 'OnLevelFinishedLoading' function to start listening for a scene change event as soon as this script is enabled.
    SceneManager.sceneLoaded += OnLevelFinishedLoading;
}
void OnDisable()
{
    // Tell our 'OnLevelFinishedLoading' function to stop listening for a scene change event as soon as this script is disabled.
    // Remember to always have an unsubscription for every delegate you subscribe to!
    SceneManager.sceneLoaded -= OnLevelFinishedLoading;
}

Implement UI elements in the Player script
Back in the editor, initialize the Food Text field of the Player prefab
The game should now be playable, but without sound
The tutorial series continues on at this point to add sound effects and music, as well as mobile controls, but we’re going to call it quits.