Vertex.js

class Vertex {
    constructor(num, x, y) {
        this.num = num;
        this.x = x;
        this.y = y;
        this.r = vertexRadius;
    }

    move(x, y) {
        this.x = x;
        this.y = y;
    }

    mouseIn() {
        return dist(this.x, this.y, mouseX, mouseY) <= this.r;
    }

    // update() {
    //     if (this.mouseIn()) this.clicked();
    // }

    // clicked() {

    // }

    display() {
        stroke(0, this.mouseIn() ? 255 : 50); strokeWeight(3); fill(255);
        circle(this.x, this.y, 2 * this.r);
        
        textAlign(CENTER, CENTER); textSize(30); fill(0, this.mouseIn() ? 255 : 50); noStroke();
        text(this.num, this.x, this.y);
    }

    highlight() {
        stroke(255, 0, 0); noFill();
        circle(this.x, this.y, 2 * this.r);
    }
}