Instantiate Prefabs on sphere surface(mini planet)

Question

Hello Unity Community!: Im working on a mini planet project, but I have a problem. Using Unity free 4.3.4 on Mac.

Im trying to instantiate prefabs over a sphere surface, this prefabs consist of: Empty GameObject at (0,0,0) (it is also Center of the Planet).this Empty GO (pivot) is also a parent of the Prefab which is on sphere surface. So if I rotate parent, prefab is moving around the surface. I need to generate a fixed amount of prefabs BUT these SHOULD NOT COLLIDE with each other when generated. Also, if possible give any guidance on how to make those prefabs allways "readable"(to adjust their rotation so when planet is rotated it adjust is never upside down). This is my actual code:

 public class SpawnTouchables : MonoBehaviour 
 {
     public GameObject tokenPrefab;
 
     public int maxTokenCreation=50;
     public GameObject planet;
     void Start()
     {
         transform.parent=planet.transform;
 
         for(var tokenCount = 0; tokenCount < maxTokenCreation; tokenCount++ ){
             float angleX = Random.Range(0,360);
             float angleZ = Random.Range(0,360);
             GameObject  token=Instantiate (tokenPrefab,transform.position, Quaternion.Euler (angleX,0,angleZ)  ) as GameObject;
             chip.transform.parent=planet.transform ;
         }
     }
 
 }

Here is the output:

https://www.dropbox.com/s/9ehk7pn6k79ruon/PrefabsOnPlanet.tiff

Thank you in advance,

Alonso G.

[1]: https://www.dropbox.com/s/9ehk7pn6k79ruon/PrefabsOnPlanet.tiff

Answer 1

Answer by alonsoGarrote · Mar 26, 2014 at 08:25 PM

Hello there, So, I decided to create a List of Vector3 positions so I could take one position at a time from that list on Object.Instantiate(). Here is the code:

 public  List<Vector3> CreateTokenPos()
     {
 
 
         for(var angleX=-150;angleX<0;angleX+=30)
         {
             for(var angleY=0;angleY<=330;angleY+=30)
             {
                 tokenPosOnPlanet.Add(new Vector3(angleX,angleY,0));
             }
 
         }
         return tokenPosOnPlanet;
     }

I use, longitud latitude theory, so I take a position at each intersection.

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Instantiate Prefabs on sphere surface(mini planet)

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