Teaching aid: 1. Several sketches with line shapes. 2. A cubic and cylindrical frame model;

Learning tools: soft pencil, eraser, textbook, exercise book.

one

(1) Organize teaching to check students' classroom routine and preparation of learning tools.

(2) Introduce several new sketches of line modeling and several sketches of light and shade,

(3) Give students appreciation, recognition and explanation.

Question: There are similarities and differences between the sketch of line modeling and the sketch of light and dark.

(4) Teaching new lessons

Second, the characteristics of line modeling sketch and the modeling function of lines.

Through the use of line structure, line modeling sketch directly reflects and implies the size, distance, orientation and contrast of the object, and shows the internal and external combination relationship of the object and the spatial state of the front, back, left and right.

Line modeling sketch eliminates or weakens the level of light and dark tones and emphasizes the real physical structure of the object, so the effect of expressing the image of the object is clear, affirmative, clear and strong.

The sketch of line imprisonment is to study the natural creation and the structure of objects by line imprisonment. The modeling function of lines can be summarized as follows:

(1) shows the outline of the object image, and (2) outlines the boundary of the object.

(3) Express the internal and external structure, spatial position, perspective change and combination relationship of objects.

(4) the relationship between reality and reality, the relationship between light and shade, and the sense of volume.

(5) to show the potential, strength and rhythm of objects, (6) to show people's interest and (7) temperament.

Line modeling sketch can not only be used as an artistic expression in art, but also be applied to science and engineering majors in the form of graphics. As a kind of confinement skill for engineers and technicians, it serves the design. In the drawing of architecture, garden and industrial design, the confinement of structural lines has become a design method for engineers and technicians, which is widely used in various fields of modern architecture.

Three, cubes and cylinders

(1) cube (according to cube frame model analysis)

Cube is the foundation of all forms, and its structure is composed of six square planes with the same size, which are combined according to the vertical relationship.

The cylinder rotates 360 degrees around the long side of the rectangle. And constitute. It can also be said to be composed of countless identical round faces (such as hard coins stacked into a cylinder)

(2) cylinder. The combination of cube and cylinder shows that a cylinder can be produced in a cube. The cylinder in the cube is formed by rotating 306 around one half of the cube as the axis and the center point of one face of the cube. The three-dimensional sense of a cylinder can be reflected by the perspective round surfaces of the top and bottom surfaces.

Fourth, the operation requirements

1, copy the textbook cube and cylinder model painting.

2. Draw with 2B and 5B pencils; 3. Require accurate perspective of objects; 4. The structure is clear.

Specific model template

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