Christmas_Tree/public/data/scripts/js/star.js

"use strict";
class Star extends Decoration {
    constructor(properties) {
        super(properties);
        this.createTriangles();
    }
    get properties() {
        let obj = super.properties;
        obj['raysCount'] = this.raysCount;
        obj['innerRadius'] = this.innerRadius;
        return obj;
    }
    createTriangles() {
        this.triangles = [];
        let increment = p.TWO_PI / this.raysCount / 2, firstOuter = true;
        for (let i = 0; i < p.TWO_PI; i += increment) {
            let x1 = p.sin(i), y1 = -p.cos(i), x2 = p.sin(i + increment), y2 = -p.cos(i + increment);
            if (firstOuter) {
                x1 *= this.radius,
                    y1 *= this.radius,
                    x2 *= this.innerRadius,
                    y2 *= this.innerRadius;
            }
            else {
                x2 *= this.radius,
                    y2 *= this.radius,
                    x1 *= this.innerRadius,
                    y1 *= this.innerRadius;
            }
            firstOuter = !firstOuter;
            this.triangles.push([
                p.createVector(x1, y1),
                p.createVector(x2, y2),
                p.createVector(0, 0)
            ]);
        }
    }
    brightness(value) {
        this.triangles.forEach((t, i) => {
            p.fill(0, 0, 0, value);
            p.triangle(t[0].x, t[0].y, t[1].x, t[1].y, t[2].x, t[2].y);
        });
    }
    display(pos, dim) {
        super.display(pos, dim);
        p.noStroke();
        this.triangles.forEach((t, i) => {
            let color = this.colors[i % this.colors.length];
            p.fill(color);
            p.triangle(t[0].x, t[0].y, t[1].x, t[1].y, t[2].x, t[2].y);
        });
        if (this.mouseIsOver) {
            this.brightness(70);
        }
        p.pop();
    }
    update() {
        super.update();
    }
    toJSON(index) {
        let list = [
            "raysCount",
            "innerRadius"
        ];
        let obj = super.toJSON(index);
        for (let item of list) {
            obj[item] = this[item];
        }
        return obj;
    }
}
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