The gravitational field of a planet and its affect on the trajectory of a space ship traveling in a straight line is not the same as the wind affecting a horizontally shot rocket. Depending on the wind direction and its speed, it’s going to create a drag force or a boost force to the launched rocket. That’s where the threshold I referred to comes in. It’s a point of change in the affect of the wind, or the result being rocket’s new trajectory. Using that triangle to calculate an arc is a great idea, but it doesn’t entirely account for wind speed / direction. The kind of function / formula you’re looking for is one that contains a variable for each property involved, and a triangle-based arc would involve too much more unnecessary math. Your challenge is to search for a function / formula that has an initial velocity and straight-line trajectory which is affected by a set of two wind variables (direction and speed). Try a sailboat math search, or a short-distance bullet trajectory formula that is calculating for the influence of wind…just to get the basic function / formula understood. It probably is going to result in a high-school level algebraic function, not some hoity-toity space slingshot theorem.