import { getRandom } from "tsparticles-engine"; export class CircleShape { randomPosition(position, size, fill) { const generateTheta = (x, y) => { const u = getRandom() / 4.0, theta = Math.atan((y / x) * Math.tan(2 * Math.PI * u)), v = getRandom(); if (v < 0.25) { return theta; } else if (v < 0.5) { return Math.PI - theta; } else if (v < 0.75) { return Math.PI + theta; } else { return -theta; } }, radius = (x, y, theta) => (x * y) / Math.sqrt((y * Math.cos(theta)) ** 2 + (x * Math.sin(theta)) ** 2), [a, b] = [size.width / 2, size.height / 2], randomTheta = generateTheta(a, b), maxRadius = radius(a, b, randomTheta), randomRadius = fill ? maxRadius * Math.sqrt(getRandom()) : maxRadius; return { x: position.x + randomRadius * Math.cos(randomTheta), y: position.y + randomRadius * Math.sin(randomTheta), }; } }