@tsparticles/plugin-emitters-shape-circle/umd/EmittersCircleShape.js

tsParticles emitters shape circle plugin

(function (factory) {
    if (typeof module === "object" && typeof module.exports === "object") {
        var v = factory(require, exports);
        if (v !== undefined) module.exports = v;
    }
    else if (typeof define === "function" && define.amd) {
        define(["require", "exports", "@tsparticles/plugin-emitters", "@tsparticles/engine"], factory);
    }
})(function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    exports.EmittersCircleShape = void 0;
    const plugin_emitters_1 = require("@tsparticles/plugin-emitters");
    const engine_1 = require("@tsparticles/engine");
    const quarter = 0.25, double = 2, doublePI = Math.PI * double, squareExp = 2, half = 0.5;
    class EmittersCircleShape extends plugin_emitters_1.EmitterShapeBase {
        constructor(position, size, fill, options) {
            super(position, size, fill, options);
        }
        async init() {
        }
        randomPosition() {
            const size = this.size, fill = this.fill, position = this.position, generateTheta = (x, y) => {
                const u = (0, engine_1.getRandom)() * quarter, theta = Math.atan((y / x) * Math.tan(doublePI * u)), v = (0, engine_1.getRandom)();
                if (v < quarter) {
                    return theta;
                }
                else if (v < double * quarter) {
                    return Math.PI - theta;
                }
                else if (v < double * quarter + quarter) {
                    return Math.PI + theta;
                }
                else {
                    return -theta;
                }
            }, radius = (x, y, theta) => (x * y) / Math.sqrt((y * Math.cos(theta)) ** squareExp + (x * Math.sin(theta)) ** squareExp), [a, b] = [size.width * half, size.height * half], randomTheta = generateTheta(a, b), maxRadius = radius(a, b, randomTheta), randomRadius = fill ? maxRadius * Math.sqrt((0, engine_1.getRandom)()) : maxRadius;
            return {
                position: {
                    x: position.x + randomRadius * Math.cos(randomTheta),
                    y: position.y + randomRadius * Math.sin(randomTheta),
                },
            };
        }
    }
    exports.EmittersCircleShape = EmittersCircleShape;
});