• Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
  • Asset Store
  • Get Unity

UNITY ACCOUNT

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account
  • Blog
  • Forums
  • Answers
  • Evangelists
  • User Groups
  • Beta Program
  • Advisory Panel

Navigation

  • Home
  • Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
    • Blog
    • Forums
    • Answers
    • Evangelists
    • User Groups
    • Beta Program
    • Advisory Panel

Unity account

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account

Language

  • Chinese
  • Spanish
  • Japanese
  • Korean
  • Portuguese
  • Ask a question
  • Spaces
    • Default
    • Help Room
    • META
    • Moderators
    • Topics
    • Questions
    • Users
    • Badges
  • Home /
avatar image
0
Question by 0V3RR1D3 · May 27, 2014 at 01:16 AM · terrainsphereperlin noisedeform

Perlin noise sphere

I Have managed to create some random terrain using perlin noise as well as a voxel system, my quetion is how would i make a phere defor using perlin noise, eg a random planet generator :D

Comment
Add comment
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users

2 Replies

· Add your reply
  • Sort: 
avatar image
1
Best Answer

Answer by 124c41 · May 27, 2014 at 10:08 AM

Hi,

generally, there are two ways to achieve this:

  1. You need to find a way to map 2D noise to a sphere. There are several methods to do this, but none is perfect, as they will either create distortions or seams or both. The most common methods are described here: http://vterrain.org/Textures/spherical.html I'd recommend a cubic aproach, as the distortions are tolerable and the seams can be worked around.

  2. A noise map on a sphere is possible without seams or distortions, but you need 3D noise for that, as is described here: Improved perlin noise

Comment
Add comment · Show 2 · Share
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users
avatar image 0V3RR1D3 · May 28, 2014 at 10:11 PM 0
Share

This kinda answer my Q but when i made a random terrain generator i simply looped from - to the amount of verticies changing there hieght value, but how could this be done with a sphere?

avatar image 124c41 · May 30, 2014 at 10:31 PM 0
Share

You will need to find a method to translate the 2d height information (the noise) to your sphere. The way to do this depends on the mapping. Take the 'naive' method provided in my first link: The noisemap should have a 2:1 ratio (width to height). At the equator, you take the middle line of this map and project it to your sphere from an arbitrary starting point all around. The same goes for all other vertices except the poles, where all the information of the top and bottom line of your map are projected unto one vertex each (this is the distortion i was talking about). For other ways of projection other methods are necessary.

This is kind of hard to describe in a foreign language. Hope it helps.

avatar image
1

Answer by tanoshimi · May 27, 2014 at 04:16 PM

I'm pretty sure this is included in the Unity procedural examples asset? http://u3d.as/content/unity-technologies/procedural-examples/3zu

Comment
Add comment · Share
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users

Your answer

Hint: You can notify a user about this post by typing @username

Up to 2 attachments (including images) can be used with a maximum of 524.3 kB each and 1.0 MB total.

Welcome to Unity Answers

If you’re new to Unity Answers, please check our User Guide to help you navigate through our website and refer to our FAQ for more information.

Before posting, make sure to check out our Knowledge Base for commonly asked Unity questions.

Check our Moderator Guidelines if you’re a new moderator and want to work together in an effort to improve Unity Answers and support our users.

Follow this Question

Answers Answers and Comments

23 People are following this question.

avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image

Related Questions

How to create a terrain in a sphere with Perlin Noise 0 Answers

[BEGINNER] Generating Terrain with Perlin noise flat and nothing happens ? 1 Answer

How to generate a smooth spherical world? 1 Answer

How would one approach tile-by-tile terrain generation with Perlin Noise? 0 Answers

Random Terrain Generation (Trees, Details, Textures) by passing a Seed? 0 Answers


Enterprise
Social Q&A

Social
Subscribe on YouTube social-youtube Follow on LinkedIn social-linkedin Follow on Twitter social-twitter Follow on Facebook social-facebook Follow on Instagram social-instagram

Footer

  • Purchase
    • Products
    • Subscription
    • Asset Store
    • Unity Gear
    • Resellers
  • Education
    • Students
    • Educators
    • Certification
    • Learn
    • Center of Excellence
  • Download
    • Unity
    • Beta Program
  • Unity Labs
    • Labs
    • Publications
  • Resources
    • Learn platform
    • Community
    • Documentation
    • Unity QA
    • FAQ
    • Services Status
    • Connect
  • About Unity
    • About Us
    • Blog
    • Events
    • Careers
    • Contact
    • Press
    • Partners
    • Affiliates
    • Security
Copyright © 2020 Unity Technologies
  • Legal
  • Privacy Policy
  • Cookies
  • Do Not Sell My Personal Information
  • Cookies Settings
"Unity", Unity logos, and other Unity trademarks are trademarks or registered trademarks of Unity Technologies or its affiliates in the U.S. and elsewhere (more info here). Other names or brands are trademarks of their respective owners.
  • Anonymous
  • Sign in
  • Create
  • Ask a question
  • Spaces
  • Default
  • Help Room
  • META
  • Moderators
  • Explore
  • Topics
  • Questions
  • Users
  • Badges