What is 3D?

3-D refers to a space system formed by adding a direction vector to the plane 2.

The so-called three dimensions, according to popular theory, are only three directions that are artificially specified and staggered (vertical is a very characteristic understanding). 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.

3D is not only 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 upper and lower space, and Z represents the front and rear space, thus forming a three-dimensional sense of human vision. 3D animation is a three-dimensional animation produced by 3D production software, realizing the trend of further development.

The so-called three-dimensional space refers to the space in which we live, which can be understood as having a front and back-up and down-or so. If time is regarded as a matter, plus time, it will be a four-dimensional space. But it is not difficult to understand that you can go back to the past at will in time, but it should be understood that "just now" and "now" are different physical beings, but you can't go back to "just now" and "past".

Three-dimensional is composed of two dimensions, that is, only two directions intersect, and a two-dimensional and a one-dimensional are superimposed together to get three-dimensional.

Three-dimensional is stereoscopic, but we often say that front and back, left and right, and up and down are all relative to the observation point of view. There is no absolute front and back, left and right, up and down.

3D technology is mainly used in animation industry. In China, 3D animation mainly includes Exploring the Global Village (said to be the first 3D animation in China) and Mobius Ring.

bust, waist and hip

Curved beauty is an important symbol to measure the beauty of women's body, and women's "three measurements" (bust, waist and hip) are the core factors that constitute the curvy beauty. So, how to measure whether the "measurements" of women are standard? According to the physique of Chinese people, combined with the influence of fitness exercise on human body shape and physique, Chinese bodybuilding experts have studied and summarized the methods for calculating the standard measurements of women: chest circumference = height (cm) ×.535, waist circumference = height (cm) ×.365, and hip circumference = height (cm) ×.565.

both the actually calculated index and the standard index of 3 cm are standard. Less than 5 cm, indicating too slim (thin); More than 5 cm, indicating that it is too plump (overweight). However, the measurement standard of professional female models is different from this. Due to professional needs, there is a certain gap between their measurement standard and normal standard.

Generally, the ratio of female measurements is: bust is about equal to hip, and waist is about 23cm smaller than bust or hip. Through measurement and calculation, if any circumference is found to be different from the standard data, bodybuilding can make up for it. Because targeted bodybuilding can strengthen the coordinated development of the "three measurements" and prevent the imbalance. In addition, bodybuilding exercises can also make muscles and fat in all parts of the body evenly distributed, which is beneficial to the bodybuilding of the whole body.

Method of measuring circumference:

Chest circumference: Chest circumference reflects the size of chest and the development of chest muscles and breasts, and is an important indicator of physical development. When measuring, the body stands upright and the arms droop naturally. The front of the tape measure is placed on the upper edge of the nipple, and the back of the tape measure is placed at the lower corner of the scapula. First measure the chest circumference at rest, then measure the chest circumference at inhalation, and finally measure the chest circumference at exhalation. The difference of chest circumference between deep inhalation and deep exhalation is respiratory difference, which can reflect the function of respiratory organs. The average adult's breathing difference is 6 ~ 8 cm, and the breathing difference of regular exercisers can reach more than 1 cm. When measuring the chest circumference of underage women, the tape measure should be placed horizontally at the lower corner of the scapula and in front of the nipple. Pay attention to remind the measured person not to shrug and not to bend over when exhaling.

Waist circumference: Waist circumference reflects the development of waist and abdominal muscles. When measuring, the body is upright, the arms droop naturally, do not tuck in the abdomen, keep breathing steady, and put the tape measure horizontally on the hip bone and the narrowest part under the ribs (the thinnest part of the waist).

Hip circumference: Hip circumference reflects the development of hip bones and muscles. When measuring, the legs stand upright together, the arms droop naturally, and the tape measure is horizontally placed at the most convex part of the pubic symphysis in front and the gluteus maximus in the back.

in order to ensure the accuracy, when measuring the "three measurements", one should be on the cross section, and the other should be done before exercise. At the same time, we should pay attention to the same time and place for each measurement, and don't pull the tape measure too tightly or too loosely when measuring, so as to be careful and accurate.

Three-dimensional animation

, also known as 3D animation, is a new technology with the development of computer software and hardware technology in recent years. Three-dimensional animation software first establishes a virtual world in the computer. Designers build models and scenes in this virtual three-dimensional world according to the shape and size of the objects to be represented, then set the motion trajectory of the model, the motion of the virtual camera and other animation parameters according to the requirements, and finally assign specific materials to the model and light it as required. When all this is done, the computer can automatically calculate and generate the final picture.

3D animation technology is a useful tool because of its way of simulating real objects. Because of its accuracy, authenticity and unlimited maneuverability, it is widely used in many fields such as medicine, education, military, entertainment and so on. In terms of film and television advertising production, this new technology can give people a refreshing feeling, so it has been welcomed by many customers. Three-dimensional animation can be used for special effects production (such as explosion, smoke, rain, light effect, etc.), special effects (crash, deformation, illusory scenes or characters, etc.), advertising product display, title flying and so on.

Asian 3D Animation Alliance-Flower Crow Movies * China City

3D Murals

According to the British Daily Mail and Daily Express on the 26th, John Pew, a 61-year-old American three-dimensional art painter, has painted amazing and realistic three-dimensional paintings on the walls of many buildings around the world, and passers-by who don't know the truth often try to "walk into the paintings".

John spent six months on the wall of a large building in Honolulu, Hawaii, painting a mural of a huge wave more than ten meters high rushing to the shore for three children. Because this three-dimensional mural is so realistic, even the local firefighters who drove by were taken in. They thought that the three children in the painting were in danger, so they quickly stopped the fire truck and rushed to the "huge wave" to save the children. It was not until they ran a few meters away from the mural that they suddenly stopped and realized that it was just a painting.