Circle inside Circle

Question

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

Answer 1

Best Answer

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 );
 }

Add comment · Show 2 · Share

dot_i · Dec 19, 2018 at 11:43 AM 0

Share

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

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

Share

I forgot something in the formula to compute the angle:

 float angle = Random.value * $$anonymous$$athf.PI;

should be

 float angle = Random.value * $$anonymous$$athf.PI * 2;

Circle inside Circle

1 Reply

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions