The beauty of lines plays an important role in the beauty of form, and things with shapes can't do without lines. Different lines reflect different emotions. Straight line, curve and broken line are basic line types, each of which has certain aesthetic characteristics, especially in the combination of lines, the aesthetic effect of a certain line is more prominent. For example, horizontal lines can bring a peaceful and tranquil effect. This can be clearly seen in John Conteh Taylor's photo of Vivenhoe Garden in Essex. Slant lines can show a strong sense of movement and instability. For example, the British painter Joseph Marode William Turner's "The Meeting of the Thames and the Medway River" uses various oblique lines to describe the surging crisis. Pyramid-shaped lines will create stability, solemnity and security. This is the easiest to feel. Italian painter Vitole Capac's The Virgin Son and Leonardo da Vinci's Mona Lisa all have this line style. In addition, the sawtooth shape can give people a hard and painful impression, round and soft, and the broken line square looks stiff and powerful, and so on. This is a common feeling of people.
Many aestheticians in history have revealed the beauty of lines and their forms. For example, Willianm Hogarth in Britain said that the snake line is the most beautiful line, and Parker in the United States said: "The horizontal line conveys a quiet emotion; Vertical lines represent solemnity, nobility and yearning; Twisted lines indicate conflict and fierceness; The curve is soft and the meat is tender. " If these viewpoints can be linked with concrete things in life and people's long-term life experience, they have great cognitive value without special mechanical explanation. We should adopt the same attitude towards the golden section law, which has a very important influence in the history of European art. The golden section is a proportional relationship between geometry and mathematics. According to this law, the ratio of the whole to the larger part is equal to the ratio of the larger part to the smaller part, that is, the ratio of the short side to the long side of a rectangle must be equal to the ratio of the sum of the long side and the short side, and the specific ratio is 1: 1.66438+08. Pachouri, an Italian mathematician in the Renaissance, put forward in "On the Proportion of God" that all worldly objects desiring beauty must obey the golden section law. From the analysis of many beautiful buildings and works of art, we should admit the aesthetic significance of the golden section law to those works, and even admit that people prefer rectangles in daily life, such as doors, windows, books, newspapers and so on. Among them, the rectangle that conforms to the golden section law is the most beautiful. However, if the golden section law is turned into the actual law of artistic aesthetic perception and an ubiquitous and unchangeable absolute form, it is bound to violate the law of beauty, and the strict mathematical proportion and a modeling law will block the free art that can only live in a vast space.