Class Duckling

javascript_games/ducklings.js:86–238

}

class Duckling {
    constructor() {
        // Create a new duckling with random body features.
        this.direction = [LEFT, RIGHT][Math.floor(Math.random() * 2)];
        this.body = [CHUBBY, VERY_CHUBBY][Math.floor(Math.random() * 2)];
        this.mouth = [OPEN, CLOSED][Math.floor(Math.random() * 2)];
        this.wing = [OUT, UP, DOWN][Math.floor(Math.random() * 3)];

        if (this.body === CHUBBY) {
            // Chubby ducklings can only have beady eyes.
            this.eyes = BEADY;
        } else {
            this.eyes = [BEADY, WIDE, HAPPY, ALOOF][Math.floor(Math.random() * 4)];
        }

        this.partToDisplayNext = HEAD;
    }

    getHeadStr() {
        // Returns the string of the duckling's head.
        let headStr = '';
        if (this.direction === LEFT) {
            // Get the mouth:
            if (this.mouth === OPEN) {
                headStr += '>';
            } else if (this.mouth === CLOSED) {
                headStr += '=';
            }

            // Get the eyes:
            if (this.eyes === BEADY && this.body === CHUBBY) {
                headStr += '"';
            } else if (this.eyes === BEADY && this.body === VERY_CHUBBY) {
                headStr += '" ';
            } else if (this.eyes === WIDE) {
                headStr += "''";
            } else if (this.eyes === HAPPY) {
                headStr += '^^';
            } else if (this.eyes === ALOOF) {
                headStr += '``';
            }

            headStr += ') ';  // Get the back of the head.
        }

        if (this.direction === RIGHT) {
            headStr += ' (';  // Get the back of the head.

            // Get the eyes:
            if (this.eyes === BEADY && this.body === CHUBBY) {
                headStr += '"';
            } else if (this.eyes === BEADY && this.body === VERY_CHUBBY) {
                headStr += ' "';
            } else if (this.eyes === WIDE) {
                headStr += "''";
            } else if (this.eyes === HAPPY) {
                headStr += '^^';
            } else if (this.eyes === ALOOF) {