ethanneff/example

type Position = {
  canvas: { height: number; width: number; x: number; y: number };
  change: { dx: number; dy: number };
  current: { x: number; y: number };
  size: number;
};

type Vector = {
  x: number;
  y: number;
};

export const getPosition = (position: Position): Vector => {
  const dx = position.current.x - position.change.dx;
  const dy = position.current.y + position.change.dy;
  const y =
    dy < 0
      ? 0
      : dy + position.size > position.canvas.height
        ? position.canvas.height - position.size
        : dy;
  const x =
    dx < 0
      ? 0
      : dx + position.size > position.canvas.width
        ? position.canvas.width - position.size
        : dx;
  return { x, y };
};