js-2dmath/docs/circle.markdown

Fast 2d geometry math: Vector2, Rectangle, Circle, Matrix2x3 (2D transformation), Circle, BoundingBox, Line2, Segment2, Intersections, Distances, Transitions (animation/tween), Random numbers, Noise

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## Circle
  Stability: 1 (Only additions & fixes)

  Circle is represented as a two coordinates array

  [c:Vec2, r:Number]

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* **create** (*x*: Number, *y*: Number, *radius*: Number): Circle

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* **fromVec2** (*vec2*: Vec2, *radius*: Number): Circle

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* **fromSegment2** (*seg2*: Segment2): Circle

  Create a Circle with seg2 as diameter


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* **fromRectangle** (*rect*: Rectangle, *inside*: Boolean): Circle

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* **fromTriangle** (*tri*: Triangle, *inside*: Boolean, *circumcenter*: Boolean): Circle

  *todo*: review inside cases


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* **clone** (*circle*: Circle): Circle

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* **copy** (*out*: Circle, *circle*: Circle): Circle

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* **translate** (*out*: Circle, *circle*: Circle, *vec2*: Vec2): Circle

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* **moveTo** (*out*: Circle, *circle*: Circle, *vec2*: Vec2): Circle

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* **distance** (*circle*: Circle, *circle_2*: Circle): Number

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* **length** (*circle*: Circle): Number

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* **area** (*circle*: Circle): Number

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* **isVec2Inside** (*circle*: Circle, *vec2*: Vec2): Boolean

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* **closestPoint** (*out_vec2*: Vec2, *circle*: Circle, *vec2*: Vec2): Vec2

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* **momentOfInertia** (*circle*: Circle, *mass*: Number)

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* **perimeter** (*circle*: Circle)

  **see**: [length](#Circle-length)


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* **move** (*out*: Circle, *circle*: Circle, *vec2*: Vec2)

  **see**: [moveTo](#Circle-moveTo)