@woosh/meep-engine/src/engine/graphics/particles/particular/group/ParticleSpecification.js

Pure JavaScript game engine. Fully featured and production ready.

/**
 *
 * @deprecated use {@link AttributeGroupSpec} instead
 */
export class ParticleSpecification {
    /**
     *
     * @constructor
     */
    constructor() {
        /**
         *
         * @type {Array.<ParticleAttribute>}
         */
        this.attributes = [];
    }

    /**
     *
     * @param {string} name
     * @return {undefined|ParticleAttribute}
     */
    getByName(name) {
        const attributes = this.attributes;
        const n = attributes.length;
        for (let i = 0; i < n; i++) {
            const attribute = attributes[i];

            if (attribute.name === name) {
                return attribute;
            }
        }

        return undefined;
    }

    /**
     *
     * @param {ParticleAttribute} attribute
     * @returns {ParticleSpecification}
     */
    add(attribute) {
        //check uniqueness of name
        if (this.getByName(attribute.name) !== undefined) {
            throw new Error(`Attribute named '${attribute.name}' already exists`);
        }

        this.attributes.push(attribute);

        //for chaining, return self
        return this;
    }
}