Circle

Module Geometry.Circles

In ixfx, a circle is simply an object with radius, or if it’s positioned it also has coordinates:

type Circle = {
  radius:number
}
type CirclePositioned = {
  radius:number
  x:number
  y:number
}

Tip

Since CirclePositioned is also a Point (sharing x & y properties), it can be used anywhere a Point is accepted

Once you have that there are a bunch of functions to help you work with circles.

• area - compute area
• bbox - compute bounding box
• center - compute center
• circumference - (aka ‘length’)
• distanceCenter - distance between two circle centers
• distanceFromExterior - distance between outer edge of two circles
• interpolate - compute relative position along circumference
• intersectionLine - point(s) of intersection between a circle and line
• intersections - points of intersections between two circles
• isContainedBy - check if one circle contains another circle or point
• isIntersecting - check if one circle intersects with another circle or point
• nearest - compute nearest point on circle’s perimeter to a given point
• pointOnPerimeter - get point on perimeter at specified angle
• randomPoint - get a random point within circle