Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Game Development How to Make a Video Game Pickups Spawn Pickups Randomly

My frog is completely ignoring the flies.

    private GameObject flyPrefab;

    [SerializeField]
    private int totalFlyMinimum = 12;

    private float spawnArea = 25f;

    public static int totalFlies;

    // Use this for initialization
    void Start()
    {
        totalFlies = 0;

    }

    // Update is called once per frame
    void Update()
    {

        // while the total number of flies is less than the minimum...
        while (totalFlies < totalFlyMinimum) {

            //... then increment the total number of flies...
            totalFlies++;

            //... Create a random position for a fly
            float positionX = Random.Range(-spawnArea, spawnArea);
            float positionZ = Random.Range(-spawnArea, spawnArea);

            Vector3 flyPosition = new Vector3(positionX, 2f, positionZ);

            //... and create a new fly.
            Instantiate(flyPrefab, flyPosition, Quaternion.identity);
        } ```
Montana Kern
Montana Kern
1,358 Points

I had a similar issue. My was caused because I wanted to make a larger flying pattern for the flies, so i increased the float value to 3f. The problem with doing it that way was that the reference for the collision was still with the "Geometry" so as the frog chased the flies, it completely missed the collider sphere, and therefore the fly was never destroyed. If you post your "FlyMovement" Script I can tell you if that might be the issue, as it was for me.

1 Answer

I had the very same problem. But I figured out, that I've deleted fly object before applying changes (as stated at 8:05 in this video). So you need to add new "fly" to the scene (hierarchy), apply to its geometry all scripts as you have done in the "Script the fly pickup" video. Also movement should be added. Then hit the apply button and you can delete it.