how do htey make 3d movies

The basic idea is not using 2 but 3 cameras. The images are filmed from the 3 axis planes in the line of sight. The items "thrown" at the camera are actually setup so it stops shy of the cam and the image is filmed so it just appears to be going out of the cam toward you.
Camera one films in the RED spectrum, camera two films in the Blue spectrum and camera 3 films in the Green spectrum, so when the 3 images are added together from 3 different cams it seems like the entire view is one image stacked on top another and looks like it is 3 dimensional.
The cam is setup like a wide panorama box, cam one on the right, cam 2 in the middle and cam 3 on the left so whatever it sees it has the aspect as if it was viewed from a set of human eyes which sees everything from both left, right and on center axis, that explains the 3 axis field of view.

As for why the film in three levels of color, all images are basically comprised of the three base colors, red, blue and green in the spectrum they all make and can be made to blend into any of the 256 colors that is of the basic spectrum and also can be combined into the 4096 different colors in the known spectrum in the total field of viewable and non viewable color. So when you wear the blue and red glasses this tricks the mind into seeing 66% of the field of viewable colors and so you see it in a blurry 3D way. True 3D is so hard to film that the level of tech it would take to actually film it the way we see it is nearly impossible and so expensive it is staggering. Not to mention the tech is almost 120 years away by any standards.

So with this high def way of seeing it seems like you are there and Johnny Depp is ten feet away and about to launch a bayonet at you. So there you go that is as basic an explanation as I can give, the true details of the way it works would dumbfound you and the mouth drop syndrome would leave you dragging your jaw.
11 months ago