function getCenter(w, h, scale) {
    const x = w / 2;
    const y = (h - ((220 - 90) * RECT_RATIO * scale)) / 2;
    return {
        x: x,
        y: y
    };
}
@name getCenter
@property {Number} - typo rect width
@property {Number} - typo rect height
@property {Number} - typo scale
@returns {Object} center position x and y
@description get a center position of a typo