I agree, but I never suggested you could. All you need is the data.
The exit wound has to be moved down several inches or JFK's body has to be tilted much further forward to get a trajectory match. Neither of which matches with the reality of the Zapruder film. On one hand you agree with me you can not create trajectories with a piece of film but then at at the end of your reply you state you can with the Zapruder film.
I'm not using the film to determine the trajectory... The 3-D object, JFK's body, shows the entry and exit wounds. You can't move those wounds. They establish a point A and a point B. All you need then is the position of the body.
The film shows the postion of the body, not the trajectory, but knowing the enty/exit wound locations one can extrapolate a direction. The wound angle is too flat. His body is too upright. The visual evidence (wounds & body position) does not match the proposed trajectory from that window.
I'm not a conspiracy theorist. I don't know who killed him, but there is no way the repository window lines up with that wound given the visual evidence.
jw