When I set the floor of my tracking scene, I have to select 3 points to use. However, I noticed that the orientation changes depending on which 3 points I pick. I always thought it didn't matter. But that begs the question, which 3 points work best? Here are some pictures showing the situations.
As shown in the pictures, different points give different results, of which some work better than others. How should I know which 3 points to use in a scene not as controlled as this? This is not a subjective question directly relating to this scene, it is so that I know which points are supposed to be used, as there is a right and wrong answer.
The 3 selected trackers are the ones used to set the floor, and you can see using the y axis that the position and orientation changes.