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Question by Antao98 · Apr 01, 2018 at 11:23 PM · proceduralgenerationperlin noiseprocedural texturing

Is it possible to round a perlin noise value to 1 or 0?

Is it possible to round a perlin noise value to 1 or 0? What I mean is, if perlin noise floats between 0 and 1, how can I round the values bigger than 0.50 to 1 and the values smaller than 0.50 to 0. I'm making a texture and I already have perlin noise generating it, but what I'm looking for is a 0 or 1 system.

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avatar image Antao98 · Apr 02, 2018 at 10:48 PM 0
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Even though no one is answering I'm still gonna give updates. I've made a new script, but with basic noise, not with perlin noise.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class SimplexNoise : $$anonymous$$onoBehaviour {
 
     float xCoord, yCoord;
     public int width, height;
     public GameObject rockTile;
     float noise;
     Vector3 pos;
 
     // Use this for initialization
     void Start () {
         GenerateTerrain ();
     }
         
     void GenerateTerrain()
     {
         for (xCoord = 0; xCoord < width; xCoord++) {
             for (yCoord = 0; yCoord < height; yCoord++) {
                 noise = Random.value;
                 pos = new Vector3 (xCoord, yCoord, 0);
                 if(noise < 0.5f)
                 {
                     noise = 0;
                 }
                 else{
                     noise = 1;
                     Instantiate (rockTile, pos, Quaternion.identity);
                 }
             }
         }
     }
 }


Basically it does what I want, but I'm ending with a basic white noise "texture".

Note: If you try this start with the width and height at 10, then increase it accordingly to your machine, because it will crash unity.

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Answer by Eno-Khaon · Apr 03, 2018 at 12:21 AM

Unity's Perlin Noise function takes a Vector2 as input and returns a float value, so I don't see any reason why you wouldn't be able to simply Round the result of it.

 float totalWidth = 50.0f; // example Width
 float totalHeight = 50.0f; // example Height
 
 for(int y = 0; y < totalHeight; y++)
 {
     float fy = y / totalHeight;
     for(int x = 0; x < totalWidth; x++)
     {
         float fx = x / totalWidth;
         float sample = Mathf.PerlinNoise(fx, fy);
         sample = Mathf.Round(sample);
     }
 }
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