Levels From Text

Lesson 11 of 19 in Coddy's Unity Game: Brick Breaker course.

A game with levels needs a way to write them down. Text is the easiest: one character per brick, one string per row. Here a digit is a brick with that many hits, a dot is a gap, and a level's rows go in one string split by /, so the scene's levels holds three layouts and the first is today's wall.

string[] rows = "1.1/22".Split('/');   // "1.1" and "22"
char c = rows[1][0];                     // '2'

A digit character is not its number: '3' is a char whose code is 51. The digits have codes in order, so taking away '0' gives the number: '3' - '0' is the int 3. Each row is centered on its own length, -(line.Length - 1) * spacingX / 2f.

Challenge

Medium

Build the wall from text, such as 3.3.3/22222.

In GameManager, remove rows, columns and rowHits; add public string[] levels; and int level;
Replace BuildWall() with BuildLevel(int index): store index in level, split levels[index] at '/', and for each digit c build a centered brick with SetHits(c - '0'); a dot is a gap.
Start() calls BuildLevel(0).

Press Play: the same wall, now built from the first level's text. Then Check.

Try it yourself

using UnityEngine;
using TMPro;

public class GameManager : MonoBehaviour
{
    public static GameManager Instance;

    public Brick brickPrefab;
    public Transform wall;
    public int rows = 5;
    public int columns = 9;
    public float spacingX = 1.75f;
    public float spacingY = 0.75f;
    public float topY = 6f;
    public int[] rowHits = { 2, 1, 1, 1, 1 };
    public int lives = 3;
    public TMP_Text scoreText;
    public TMP_Text livesText;

    int score;

    void Awake()
    {
        Instance = this;
    }

    void Start()
    {
        BuildWall();
        ShowHud();
    }

    void BuildWall()
    {
        float left = -(columns - 1) * spacingX / 2f;
        for (int row = 0; row < rows; row++)
        {
            for (int col = 0; col < columns; col++)
            {
                Vector3 pos = new Vector3(left + col * spacingX, topY - row * spacingY, 0f);
                Brick brick = Instantiate(brickPrefab, pos, Quaternion.identity, wall);
                brick.SetHits(rowHits[row]);
            }
        }
    }

    public void BrickBroken(Brick brick)
    {
        score += brick.points;
        ShowHud();
    }

    public void BallLost(Ball lost)
    {
        lives--;
        ShowHud();
        lost.ResetToPaddle();
    }

    void ShowHud()
    {
        scoreText.text = "Score: " + score;
        livesText.text = "Lives: " + lives;
    }
}