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Question by WilsonWu · Feb 07, 2016 at 09:04 PM · parentchildsphere

ball rotates around another ball

Hi, I created sphere 1 and 2, and sphere 2 is sphere1's child. How do I write my script to make sphere 1 rotates in place and sphere2(the child) rotates around it's parent? Just like a moon and an earth? thanks

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Answer by Wrymnn · Feb 08, 2016 at 09:36 AM

Hey,

you can rotate the Sphere 1 with:

transform.Rotate();

But the Sphere 2, should not be parented directly to Sphere 1.

  • Create another empty object, call it Shpere_2_Pivot.

  • Parent this object to Sphere 1

  • Parent Sphere 2 to Shpere_2_Pivot

  • position Shpere_2_Pivot to (0, 0, 0)

  • position Sphere 2 as you desire (as a Moon relative to Earth)

Now, rotate the Shpere_2_Pivot object, set its speed etc. This should look like Moon and Earth rotation

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