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2d and 3d whats the difference

2D images are completely flat and are composed of x and y points.
3D images have x, y and z (depth) points. Of course they can only be simulated on a 2D display such as a monitor.

Examples of 2D images are your Windows desktop, a Photoshop image and a game menu.
Examples of 3D images are Quake3 bots and a jet plane in a flight sim.
 
Good explanataion BFG10K. Only one thing wrong (mathmatically at least). On a plane you have 2 dimensions; length (represented by the x-coordinate and plotted left and right) and height (represented by the y-coordinate and plotted up and down).

Then in space you have 3 dimensions, and here's where you went wrong. There are x, y, and z coordinates. For some reason the mathmaticians messed with the naming system so the x is actually depth, y now is length, and z is now height. Confusing, but you just have to know it I guess.
 
You can also have a 3D image composed of overlaying 2D images, where you need to where special glasses to make it look 3D.
 
that's not really 3d though is it? its just giving the illusion that it is. at least thats what i always thought
 
Swanny, BFG10K is correct..and so are you as well. It all depends on what cordinate system you use. I am used to the z axis = depth, it is the most common system I have come across, but they are all valid, as long as they are defined.

 
It all depends on what cordinate system you use. I am used to the z axis = depth

I was using the system used by 3D programs on computers since the original poster was asking the question in the context of computing. Heck, even the Z-buffer on a video card is for the Z (depth) values.
 


<< I was using the system used by 3D programs >>



Exactly!, but I couldn't really say Swanny was &quot;wrong&quot; (other than the fact of his incorrectly stating that you were wrong about your answer, of course) but you are right.
 
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