The trick is to bisect the "FOV" and use simple trigonometry to convert the Angle to +2: FrameWidth / Distance = 2 (tan (/2). So) for'd Player's 75° FOV, FrameWidth = Distance * 1.535.
The trick is to bisect the "FOV" and use simple trigonometry to convert the Angle to a ratio of : FrameWidth / Distance = 2 (tan (FOV/2). So for the Player's 75° FOV, the FrameWidth = Distance * 1.535.