circle2-lowdeps

all credits go to tmpvar and his circle2 implementation

install

npm install circle2-lowdeps

use

new Circle([origin [, radius])

Where origin adheres to the following form:

• [0, 1]
• { x: 0, y: 1}
• new Vec2(0, 1)

and radius is a number

Note: the arguments to the Circle function are optional. If none are passed circle.position will be 0, 0 and circle.radius will be 1

containsPoint(point)

Where point looks like one of the following:

• [0, 1]
• { x: 0, y: 1 }
• new Vec2(0, 1)

This function will return true if the passed point is inside or right on the boundary of the circle.

var Circle = require('circle2');

var c = Circle()

console.log(c.contains([10, 0])) // false

c.radius(10);

console.log(c.contains([10, 0])); // true

intersectCircle(circle)

Performs an intersection between this circle and the incoming. Results are as follows:

• false - no intersection or one circle is contained in the other
• [] - same circles
• [Vec2] - single intersection
• [Vec2, Vec2] - two intersection points

toSegments([segments])

Convert this circle into a series of points representing the outline of this circle

license

MIT (see: LICENSE)