What is 2D, 3D? What is 3D?

Let me add two more sentences: the objects you see are basically 3 dimensions, such as people, boxes, cabinets, doors, the earth, and the sun!

Dimension, can only be said to be ideal, illusory, the so-called infinite extension, that is just imagination, because you can't see infinite things in a limited space, for example, if you draw a straight line, then you can only draw on paper, how wide the paper is, you can draw as long as you can, in fact, all you see is the line segment that does not draw the ends of both sides!

Draw a square again, if the paper is rectangular, then you can only draw the length of the side of the square equal to the width of the rectangular paper, and there is still room for the result, if you want to say infinite extension, then you can reverie for yourself, you can no longer see the edge of the square on the paper. In fact, you don't have this square in your eyes.

The reason why I say this is because I like to drill the horns, I like things that can be seen, and I don't like things that cannot be seen!

What time is, I don't know, because you can't see it, so I don't like it, but it's always bound by it, it's a nasty thing!

Multi-dimensional, what is it, I haven't studied, as far as I understand, you put the 2-dimensional plane or paper, first draw a straight line (or a square face) on the top, ** on both sides of the extension of the two points of the point, point A and point B, then between AB is the line segment, what do you think is the maximum distance between them? I've watched a lot of sci-fi movies, so I don't need to say it, it's 0.

Ah, speaking of which, I find a problem that multidimensional space refers to illusory objects that are constantly changing but are invisible. Like time! If you're not an expert, don't study what I'm saying right or wrong! Take a look at yours!

0-dimensional point, and this point has no size, only the position.

1-dimensional finger lines, lines without width, but lengths can be extended.

2 dimensions refers to the plane, but the plane has no thickness, just an infinite extension.

3 dimensions refers to three-dimensional, there is thickness, reflecting the space we are in now] 4 dimensions It is difficult for many people to say clearly, some people say that it is time, some people say that it is 2 dimensions, 3 dimensions are directly promoted in mathematics, and even say that after a four-dimensional cube is six ordinary cubes!

The higher dimensions are very abstract, generally speaking, there is no clear concept, and even mathematicians and physicists have different opinions; What is puzzling is that some physicists believe that the universe has 11 dimensions!

In short, that's what mathematicians and physicists are studying.

Three-dimensional refers to the three dimensions of length, width, and height. A straight line is a one-dimensional space, and countless lines form a plane, and a plane is a two-dimensional space. Countless planes are juxtaposed to form a three-dimensional space, that is, a three-dimensional space.

The term "three-dimensional space" is often used in everyday life to refer to three-dimensional Euclidean space. A space where the location of a point is determined by three coordinates. The objectively existing real space is three-dimensional space, with three measures: length, width, and height.

Three-dimensional is three-dimensional, front and back, left and right, up and down are only relative to the viewpoint of observation. There is no absolute front and back, left and right, up and down.

Key features of 3D::

1. The space target is defined by the three coordinate axes of x, y and z, and the spatial relationship is divided based on the body, which is obviously complex.

2. It can express the objective world more realistically.

3. Three-dimensional space analysis and operation can be carried out.

What is on a plane is two-dimensional. Two-dimensional, that is, left and right, up and down, there is no front and back. Laxun

Two-dimensional is a kind of flat technology, such as ordinary flat animation, called two-dimensional animation, referred to as two-dimensional. (Three-dimensional is three-dimensional). In mathematics and physics, where the first dimension is too simple and the third dimension is too complex, the two-dimensional "plain" just allows researchers to have enough space to develop their talents.

But 2D is not just a virtual space on scratch paper, it is also very valuable in reality.

Two-dimensional is a kind of flat technology, such as ordinary flat animation, which is called two-dimensional animation, and is simply known as two-dimensional. (Three-dimensional is three-dimensional). In the study of mathematics and physics, one dimension is too simple, while three dimensions are too complex, two-dimensional"Plains"Just enough space for researchers to use their talents.

But 2D isn't just a virtual space on scratch paper, it's also valuable in reality.

Dimension is the direction. The difference zone is presented in a linear direction, like a straight line, such as the width of the time line.

The two-dimensional dimension has not only the left and right directions, but also the up and down directions, so that the plane is formed.

The three-dimensional is based on the two-dimensional and adds the direction of the front and back, which constitutes the empty bridge.

Three-dimensional refers to the spatial system composed of a direction vector in the two-dimensional system of the plane. The so-called three-dimensional, according to popular theory, is just three artificially prescribed interleaved directions (perpendicular is a very characteristic understanding), and with this three-dimensional coordinate, it seems that the position of any point in the whole world can be determined. It turns out that three-dimensional is to determine the position.

Three-dimensional is the three axes of the coordinate axis, namely the x-axis, the y-axis, and the z-axis, where x represents the left and right space, y represents the upper and lower space, and z represents the space before and after, so that the three-dimensional sense of human vision is formed, and the three-dimensional animation is the three-dimensional animation made by the three-dimensional production software, so as to realize the trend of redevelopment. The so-called three-dimensional space refers to the space we are in, which can be understood as having front and back - up and down - left and right.

If time is considered to exist as a substance, then time is added to the four-dimensional space.

But it's not hard to understand that you can move back and forth in time.

Go back in time. It just should be understood as:"Just now"with"Now"It's a different substance, but you can't go back"Just now"with"In the past"

Three-dimensional is composed of two dimensions, two-dimensional means that there are only two directions interleaved, and a two-dimensional and a one-dimensional are superimposed together to obtain three dimensions. Three-dimensional is three-dimensional, but the front and back, left and right, and up and down are only relative to the viewpoint of observation. There is no absolute front and back, left and right, up and down.

Let me put it succinctly, one dimension is to have a point, two dimensions is a line and a plane, and three dimensions is an object containing length, width and height, that is, the world that our eyes see, is three-dimensional.

And the world we live in is four-dimensional, three-dimensional plus time is four-dimensional, and the human eye can only see the three-dimensional world, not the four-dimensional world.