Material preparation: white paper, pencil and marker.

1, first gently draw two parallel lines on the white paper with a pencil. If you feel that the painting is not good, you can use a ruler.

Then connect them with markers, so that the pencil line forms a triangle at the bottom. You can also use tools.

3. Then connect the top of the triangle and draw several horizontal lines in turn, as parallel as possible. The distance is different, so it looks beautiful.

4. Finally, connect the bottom two lines with a dotted line with a pencil as the shadow of the ladder, thus drawing a three-dimensional ladder diagram.

Introduction of 3D graphics:

Three-dimensional figure refers to a figure with three dimensions: length, width and height, which has a real three-dimensional sense. Three-dimensional graphics have three-dimensional shapes and spatial relationships, which can be observed and perceived from different perspectives.

Common three-dimensional graphics are cubes, spheres, cones, cylinders, prisms, pyramids and so on. In mathematics, physics, engineering, art and other fields, three-dimensional graphics are widely used.

For example, solid geometry is a branch of mathematics, which studies figures, distances and angles in space; In physics, three-dimensional graphics are used to study the propagation of sound and the characteristics of waves. In the engineering field, 3D graphics are widely used in 3D modeling and manufacturing. In the field of fine arts, three-dimensional graphics are also the basis of painting and sculpture.

Three-dimensional graphics can give people a three-dimensional sense or a sense of space. They have three directions: height, width and length. So it is closer to the real situation of the real world than the plane figure.

Three-dimensional graphics have a real sense of body, which can give people different visual experiences from different angles, and can calculate its surface area and volume. Because stereoscopic graphics are widely used in life and industry, it is very important for professionals in different fields to master the basic knowledge of stereoscopic graphics.