Circle inside Circle

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Hi, i really need some help here, im just working on a game prototype where i must randomly select a location. i got 2 circle in a same position but different radius. let says circle A (the orange circle) and circle B(blue circle). circle A is bigger than circle B. the problem is, how can i get a position where is inside circle A but outside the B circle here an example image alt text

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Answer by Hellium · Dec 19, 2018 at 11:30 AM

 public Vector2 GetRandomPositionInside2DTorus( Vector2 center, float innerRadius, float outerRadius )
 {
      float angle = Random.value * Mathf.PI * 2;
      return center + new Vector2( Mathf.Cos( angle ), Mathf.Sin( angle ) ) * Random.Range( innerRadius, outerRadius );
 }

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dot_i · Dec 19, 2018 at 11:43 AM 0

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thanks!!! it's worked exaclty what i want

Hellium dot_i · Dec 19, 2018 at 12:12 PM 0

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I forgot something in the formula to compute the angle:

 float angle = Random.value * Mathf.PI;

should be

 float angle = Random.value * Mathf.PI * 2;

Circle inside Circle

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