Random int generation between two intervals

Questions & Answers
1

I’m making a game with procedural generation for each level. At the beginning I want to create a random number of game objects(done) at a random distance(sorta done). So right now I have a random number of game objects being formed at a distance (with Random.Range(1000, 6000)). But I don’t want it to be just positive, for example, generate a number between -6000 and 6000 excluding anything smaller than 1000 and greater than -1000. After looking around the only way that came to me was using a random number between 1 and 4 where the number would be the quadrant it’d be in and then use a switch loop for each possible case.

			switch (wormhole[curWormholeGen]){
			case 1:
				switch(genQuadrant){
				case 1:
					Instantiate (wormholeType1, transform.position + new Vector3(Random.Range(minX, maxX), 0, Random.Range (minZ,maxZ)), transform.rotation);
					break;
				case 2:
					Instantiate (wormholeType1, transform.position + new Vector3(-Random.Range(minX, maxX), 0, Random.Range (minZ,maxZ)), transform.rotation);
					break;
				case 3:
					Instantiate (wormholeType1, transform.position + new Vector3(-Random.Range(minX, maxX), 0, -Random.Range (minZ,maxZ)), transform.rotation);
					break;
				case 4:
					Instantiate (wormholeType1, transform.position + new Vector3(Random.Range(minX, maxX), 0, -Random.Range (minZ,maxZ)), transform.rotation);
					break;
				}

this is just a snippet from a part of the code. There’s also a random length for the array etc… There must be a more effective way than this right?

Thanks for the help,

Troponeme

2

The bad news is that there’s no built-in function for that. The good news is that it’s very easy to write your own.

Something like this will do the trick for a single integer:

    //number will have absolute value between min, max
    //number has 50% chance of being pos/neg
    public static int AbsRange(int min, int max) {
            int i = Random.Range(min, max);
            return Random.value < 0.5f ? i : -i;
    }

If you wanted, you could write similar functions for floats, vectors, or whatever other types you might need.