What is three-dimensional?

Three-dimensional refers to the space system formed by adding a direction vector to plane two. Three dimensions are not just the three axes of the coordinate axis, that is, the X axis, the Y axis and the Z axis, where X represents the left and right space, Y represents the front and back space, and Z represents the upper and lower space (the spatial direction cannot be understood by the plane rectangular coordinate system). In practical application, the left-right movement is generally described by X axis, the up-and-down movement is described by Z axis, and the back-and-forth movement is described by Y axis, thus forming a three-dimensional sense of human vision.

Three dimensions are composed of one dimension and two dimensions, that is, two dimensions only intersect in two directions, and one dimension and one dimension are superimposed to get three dimensions.

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

Extended data:

Three-dimensional features:

The main features of 3D are as follows: (1) Spatial objects are defined by three coordinate axes, X, Y and Z, and the spatial relationship is divided based on volume, which is obviously complicated; (2) It can express the objective world more truly; (3) Three-dimensional space analysis and operation can be carried out.

Three-dimensional virtual:

The English name is VirtualReality, or VR technology for short, which is called VR technology. Suitable for tourism, real estate, architecture, villas and apartments, office buildings, scenic spots, sightseeing, hotels, restaurants, garden landscapes, park exhibitions, museums, subways, airports, stations, docks and other industries. The biggest feature of virtual reality is that users can interact with the virtual environment, turning passive viewing into more real experience interaction, and applying it in the real estate field, such as "selling treasures".

360-degree real scene and virtual roaming technology have been applied in many projects, such as online house viewing, real estate building cartoons, virtual real estate electronic building books, virtual reality studios, virtual reality stages, virtual scenes, virtual office buildings, virtual business halls, virtual business spaces, three-dimensional virtual house selection, virtual hotels, virtual reality environment performances and so on.

References:

Baidu encyclopedia -3 d