(12-20-2022, 07:33 PM)MasterGy Wrote: 3d is not very complicated, it's just very hard to explain. you are right, it should be made visually understandable. I'm happy to help. Unfortunately, I don't understand what you meant by the 3x3 cubes, even though I've read it many times. Please write it again.
I think what SMcNeill means is: at first, there is the view of inside the bedroom, only with the bed. So this should be two squares holding the width, height and length of the bed. But in 2D space we just see a thing that is like a table, at one end is a pillow, and the other end is not very exciting... somewhere to rest the feet I suppose.
This assumes someone is looking at the room right in front of him/her, and there's only this bedroom, that is empty except for the bed.
Now try adding a small desk. That would also require two squares, but cannot overlap with the bed. It might be placed in front of the bed, or behind the bed. At all times the user is looking at the room in two-dimensional space, at two objects which give a very small detail of the depth. The width and height of the bed could be distinguished easily, if it's in front of the desk. If the desk is what is at the front then all of it could be seen easily, but the depth is more difficult to judge only with two dimensions. That's why now you need the other dimension -- the two squares that define the depth.
The two squares of depth of the bed have to be different from the two squares of depth of the desk if they're going to have X coordinates (in 2D space) which are within range of each other. Might change the Y coordinates but it would elevate one of the objects off the floor and toward the ceiling, in 2D space. Then in three dimensions only, Z is the depth in this explanation.
I don't know, I missed physics in high school because I had to take chemistry for two consecutive high-school grades, got left back on the first one LOL because I wasn't that interested in school.
Not a good diagram, but it's worth a try:
Code: (Select All)
The desk is in front of the bed. Both have the same Y coordinate which is the floor. Z is the depth of the room.
What is revealed here (poorly) is that the bed and desk require at least two squares in 3D space for depth, for the outer limits.
Of course, more squares would be needed for detail.
| ^
| +============+ |
|----! !----o |
|----!============!----| Y
| ! ! | |
|
---------> X ---------->
|----------| ^
+========+ | | |
! ! o----------o Y
!========! |__________| |
! ! | | |
|
---------> Z ---------->But you're right, 3D is difficult to explain. Some people are just able to get it as a flash of lightning. Then one is asked to write a tutorial about it which is as hard for him/her as for the one trying to get that flash of lightning. :/