What are the three main points of the picture construction method?

Composition is the overall consideration and arrangement of the content and form of the picture. The principle of composition is to seek unity in change. The composition method has three main points:

(1) The position of the theme graphic on the screen.

(2) The position of non-theme graphics and its relationship with theme graphics.

(3) The position of the shape at the bottom of the picture and its relationship with the figure.

Among the three points, the first point is the decisive factor of composition, and its position in the picture determines the style of the picture. Patterns of composition can be divided into two categories: symmetrical composition and balanced composition.

Symmetrical composition: the main shape is placed in the center of the surface, and the non-main shape is placed on both sides of the main shape to play a balancing role, and the bottom shape is equally divided. Symmetric composition generally expresses static content. The changing modes of symmetrical composition include pyramid composition, balanced composition and radial composition.

Balanced composition: the main shape is placed on one side, and the non-main shape is placed on the other side, which plays a balance role and the bottom shape is not equal. Balanced composition generally represents dynamic content. Its composition styles include diagonal composition, arc composition, gradient composition, S-shaped composition, L-shaped composition and so on. The application of sketch composition is relatively simple. As long as the main part of the object is placed in the center of the picture, the distance between the whole object and the border is properly handled, and the background shape is not repeated, which is a successful composition. Students should pay attention to the fact that the "picture center" is not the isocenter of the picture, but is determined by human vision. This center is determined by the golden section principle, that is, the picture is divided at the ratio of 1: 0.6 18, and four intersecting positions in the picture are obtained, which are the "composition center points" near the center of the picture. We can put the main part of the sketch object at any point, and we can get a beautiful composition form.