Function starburst

Generates a starburst shape, returning an array of points. By default, initial point is top and horizontally-centred.

// Generate a starburst with four spikes
const pts = starburst(4, 100, 200);

points of two produces a lozenge shape. points of three produces a triangle shape. points of five is the familiar 'star' shape.

Note that the path will need to be closed back to the first point to enclose the shape.

Example: Create starburst and draw it. Note use of 'loop' flag to close the path

const points = starburst(4, 100, 200);
Drawing.connectedPoints(ctx, pts, {loop: true, fillStyle: `orange`, strokeStyle: `red`});

Options:

initialAngleRadian: angle offset to begin from. This overrides the -Math.PI/2 default.

starburst(outerRadius, points?, innerRadius?, origin?, opts?): readonly Point[]
Parameters
- outerRadius: number
  Outer radius. Maximum radius of a spike to origin
- points: number = 5
  Number of points in the starburst. Defaults to five, which produces a typical star
- OptionalinnerRadius: number
  Inner radius. A proportionally smaller inner radius makes for sharper spikes. If unspecified, 50% of the outer radius is used.
- origin: Point = Points.Empty
  Origin, or { x:0, y:0 } by default.
- Optionalopts: {
  initialAngleRadian?: number;
  }
  Options
  - Optional ReadonlyinitialAngleRadian?: number
Returns readonly Point[]