Generating a simple random terrain

Hey there.

I'm trying to create a scene that generates a random heightmap for a terrain, textures it, and then populates with trees and grass. However, I can't seem to figure out how to handle the heightmap generation. I don't need need the terrain to be infinite or anything fancy like that, but I also don't want to use pre-built toolkits, like Gaia and the like.

Any idea how I would do this?

 

There are plenty of examples on the interwebs, complete tutorials on how to do this. Google for "procedural geometry in unity" and you will learn a lot.

It is really great fun making procedural geometry in Unity, but you will not master it overnight. It's a HUGE field of expertise with lots of areas of confusion, so tackle it patiently and you may enjoy it as much as I do.

 

Use Perlin Noise. It works wonders, I've made something which allows me to generate a random terrain from a seed. I'm trying to adapt it so it makes a planet out of the terrain. (currently mind bogged haha) let me know if you want my script to have a look over, i wouldn't say use it because everyone has different ways of doing things but it'll maybe help you out.

 

1. Open blender
2. Enable ant script
3. Generate mesh/obj
4. Drag blend file into unity.
5. Done

 

Hey guys!

Thanks for the tips! I've started working on a random generator using perlin noise. So far I have this.

Code (CSharp):

1. public class HeightMapGenerator : MonoBehaviour {
2.  
3.     public float Tiling = 10.0f;
4.     public Terrain terrain;
5.  
6.     // Use this for initialization
7.     void Start () {
8.         GenerateHeights(terrain, Tiling);
9.     }
10.    
11.     // Update is called once per frame
12.     void Update () {
13.    
14.     }
15.  
16.     public void GenerateHeights(Terrain terrain, float tileSize)
17.     {
18.         float[,] heights = new float[terrain.terrainData.heightmapWidth, terrain.terrainData.heightmapHeight];
19.  
20.         for (int i = 0; i < terrain.terrainData.heightmapWidth; i++)
21.         {
22.             for (int k = 0; k < terrain.terrainData.heightmapHeight; k++)
23.             {
24.                 heights[i, k] = Mathf.PerlinNoise(((float)i / (float)terrain.terrainData.heightmapWidth) * tileSize, ((float)k / (float)terrain.terrainData.heightmapHeight) * tileSize) / 10.0f;
25.             }
26.         }
27.         terrain.terrainData.SetHeights(0, 0, heights);
28.     }
29. }
30.  

I like this because it generates the heightmap on the fly, but I'd like to add some variety. It gives me some nice hills, but I'd like to make the terrain a bit sharper and more ridged. Any idea how I would do that?

 

Hi! I am wondering the same thing, and was wondering if I could Use the script? I could mess around with it, and maybe figure out what you want? Just one question, though - does this create a world on pressing play, or on running the script? Thanks!

 

I'm Having The same Prob

 

Please don't necro-post old threads. Start your own.. it's FREE!

How to report your problem productively in the Unity3D forums:

http://plbm.com/?p=220

This is the bare minimum of information to report:

- what you want
- what you tried
- what you expected to happen
- what actually happened, especially any errors you see
- links to documentation you used to cross-check your work (CRITICAL!!!)

If you post a code snippet, ALWAYS USE CODE TAGS:

How to use code tags: https://forum.unity.com/threads/using-code-tags-properly.143875/

If you're just looking for procgen stuff, here's mine:

MakeGeo is presently hosted at these locations:

https://bitbucket.org/kurtdekker/makegeo

https://github.com/kurtdekker/makegeo

https://gitlab.com/kurtdekker/makegeo

https://sourceforge.net/p/makegeo