function Circle(x, y, radius) {
        if (x === void 0) { x = 0; }
        if (y === void 0) { y = 0; }
        if (radius === void 0) { radius = 0; }
        this.x = x;
        this.y = y;
        this.radius = radius;
        this.type = SHAPES.CIRC;
    }
@param x - The X coordinate of the center of this circle
@param y - The Y coordinate of the center of this circle
@param radius - The radius of the circle