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Game Development

Posted by Connor Kent
Connor Kent
1,969 Points

Is it possible to prevent objects from spawning within a specified position or area?

My name is Connor Kent. I'm aiming to create an MMO that will blow people away. If you can't see it by the fact that I'm taking this course, I have very little experience in programming in Unity. Mainly because I'm 13 XD. I thought about the potential of having an object spawner that could spawn objects anywhere except for a certain area. It would be great to have the knowledge required to create such a spawner during the development of my game. If anyone knows how to create something like this, will you please give me the instructions to do so?

John Shoffner
John Shoffner
1,514 Points

Hi Connor,

I don't see why not! Please recall that the FlySpawner.cs script creates fly objects in a random location. Using the fly spawner code as an example:

float badLeftX = 2.0f; float badRightX = 5.0f;

float badCloseZ = 3.0f; float badFarZ = 5.0f;

[code...]

while (totalFlies < totalFlyMinimum) { totalFlies++;

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

        // ADDED CODE
    // Make sure X is a legal value.
    if(positionX >= badLeftX && positionX <= badRightX) {

    // ... set X to closest value
    positionX = Math.Abs(positionX - badLeftX) < Math.Abs(positionX - badRightX
            ? badLeftX
            : badRightX;
    }

    // Make sure Z is a legal value.
    if(positionZ >= badCloseZ && positionZ <= badFarZ) {

    // ... set Z to closest value
    positionZ = Math.Abs(positionZ - badCloseZ) < Math.Abs(positionZ - badFarZ)
            ? badCloseZ
            : badFarZ;
    }
        // END - ADDED CODE

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

        // ...and create the new fly.
        Instantiate(flyPrefab, flyPosition, Quaternion.identity);
    }

-HTH