Linear perspective drawing: what is it and how it's done?

So how one deals with perspective?
First - the quote:
"Perspective Drawing is a technique used to represent three-dimensional images on a two-dimensional picture plane." (source) Thus it's the ability to "move" a 3d object of a real life to a flat, 2d surface.

There are two main aspects of perspective that help one draw realistically: the eye level line and the perspective point (s).

Eye level has a crucial impact on a composition. It can be placed on the upper part if the drawing space, the central or the bottom part. It helps in creating a balanced or imbalanced image. It can help emphasize the importance of each item presented on the image or help a viewer to understand better the position he/she is taking while looking at the image.

One perspective point is when there is one focal point where all the lines meet.

Two perspective points can create a more complex and dramatic work.

The three point perspective is even more dramatic and complicated.
In most of them you can't even see the vanishing point since the perspective does not allow it.

Obviously, every geometrical form has a perspective; a cube, a triangle, a circle, a trapeze and others. But since most of the figures can be squeezed in either a cube or an ellipse, most of them are based on these two.

another thing to perspective is that it creates the sense pf participation in viewer (The purpose of perspective in art). So when and if you want the viewer to be part of the event you present, you should consider your perspective.