In the world of film, "time and space" could be manipulated and search for a long time or shorter compared to what it could be in person. Directors can manipulate you, so as to result in the audience believe something is real, if it is not. Also, they're able to come up with a decade look like only one day. This is actually the expertise of the shoot.
Here's an important tip to find out an internet to shoot the first short movie.
Whenever a man walks from his house to some neighbor's house, he walks in a straight line in reality. In a film, the guy can be shot from different angles.
In fact, if you are a bystander considering a person walking from his house towards the neighbor's house from left to right so you cross the street, you are going to now see him going from directly to left.
In a movie, a guy going from his house to his neighbor's house will likely be filmed as going from left to right.
Over the following shot, he is observed going from to left, it is going to seem he is finding comfort his house as opposed to continuing to his neighbour's house. It is because the screen is two-dimensional therefore the viewer cannot literally "cross the street" and appearance through the far wall without getting disoriented.
This is how the rule of "not crossing the line" comes in.
In making movies, you will need to shoot from only 1 side from the line, to take care of directional continuity
When shooting movies, you must try to shoot from various angles,and adjust them...
In case you saw the film Inception, directed by Christopher Nolan (director in the Batman movies) up with an Oscar this season, you will possess noticed how this movie was shot from the 3 major different perspectives, not simply angles, though the camera was always making the viewer feel he was looking from a different angle...
The Matrix is yet another fine illustration of this 'directional continuity', too...
So when shooting movies, you need to think about, which side be the best shot from the frame. Working this out using story boards is a great idea, since you can envisage where exactly the best angle can be to shoot the actors when on location.