import type { Graphics } from '@pixi/graphics';
import { Polygon, PI_2 } from '@pixi/core';
/**
* Draw a star shape with an arbitrary number of points.
* @ignore
*/
class Star extends Polygon
{
/**
* @param x - Center X position of the star
* @param y - Center Y position of the star
* @param points - The number of points of the star, must be > 1
* @param radius - The outer radius of the star
* @param innerRadius - The inner radius between points, default half `radius`
* @param rotation - The rotation of the star in radians, where 0 is vertical
*/
constructor(x: number, y: number, points: number, radius: number, innerRadius?: number, rotation = 0)
{
innerRadius = innerRadius || radius / 2;
const startAngle = (-1 * Math.PI / 2) + rotation;
const len = points * 2;
const delta = PI_2 / len;
const polygon = [];
for (let i = 0; i < len; i++)
{
const r = i % 2 ? innerRadius : radius;
const angle = (i * delta) + startAngle;
polygon.push(
x + (r * Math.cos(angle)),
y + (r * Math.sin(angle))
);
}
super(polygon);
}
}
/**
* Draw a star shape with an arbitrary number of points.
*
* _Note: Only available with **@pixi/graphics-extras**._
* @method PIXI.Graphics#drawStar
* @param this
* @param x - Center X position of the star
* @param y - Center Y position of the star
* @param points - The number of points of the star, must be > 1
* @param radius - The outer radius of the star
* @param innerRadius - The inner radius between points, default half `radius`
* @param rotation - The rotation of the star in radians, where 0 is vertical
* @returns - This Graphics object. Good for chaining method calls
*/
export function drawStar(this: Graphics,
x: number,
y: number,
points: number,
radius: number,
innerRadius: number,
rotation = 0): Graphics
{
return this.drawPolygon(new Star(x, y, points, radius, innerRadius, rotation) as Polygon);
}