Question by Rinsige · Mar 19, 2019 at 05:34 AM · c#scripting problem array

How to spawn sprites in a row randomly from a single array without double-ups

I'm very new to coding and am only just starting to get the hang of it and I'm making a game that requires you to fly through 5 different colour blocks that gradually increase in speed.

A problem I've hit is I can get the 5 blocks to spawn a row in a way that randomizes the colours/positions for each block for each row but I'm constantly getting double-ups that creates holes in the row and puts two blocks on each other.

Help would be very much appreciated.

Thanks.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using System.Linq;
 
 public class WallSpawner : MonoBehaviour
 {
     public GameObject[] walls;
     public GameObject[] spawnPoints;
     public Vector2 movementDirection;
     public float spawnTime = 2f;
     private int colourIndex;
 
     // Start is called before the first frame update
     void Start()
     {
         movementDirection = new Vector2(0,-1);
         colourIndex = walls.Length -1;
         InvokeRepeating("Spawn", spawnTime, spawnTime);
     }
 
     void Spawn() 
     {
         while(colourIndex >= 0)
         {
             int rand = Random.Range(0, spawnPoints.Length);
             GameObject wall = Instantiate(walls[colourIndex], spawnPoints[rand].transform.position, Quaternion.identity);
             wall.GetComponent<Rigidbody2D>().velocity = movementDirection * 2.0f;
             Destroy(wall, 10.0f);
             colourIndex--;
 
         }
         colourIndex = walls.Length -1;
     }
 }

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