fantasy/painting/color.js

class Color {
    constructor(r, g, b, a) {
        r = Math.max(0, r);
        r = Math.min(1, r);
        g = Math.max(0, g);
        g = Math.min(1, g);
        b = Math.max(0, b);
        b = Math.min(1, b);
        
        if (a !== 0) {
            a = a || 1;
        }
        a = Math.max(0, a);
        a = Math.min(1, a);
        
        this._r = r;
        this._g = g;
        this._b = b;
        this._a = a;
    }
    rgba() {
        let out = "rgba(";
        out += Math.floor(this._r * 255);
        out += ", ";
        out += Math.floor(this._g * 255);
        out += ", ";
        out += Math.floor(this._b * 255);
        out += ", ";
        out += this._a;
        out += ")";
        
        return out;
    }
    
    static random() {
        return new Color(Math.random(), Math.random(), Math.random(), Math.random());
    }
    static randomGray() {
        let intensiviry = Math.random();
        return new Color(intensiviry, intensiviry, intensiviry, Math.random());
    }
}

export default Color;