The relationship between line drawing and sketch, the difference between line drawing and sketch, sketch and line drawing

Line drawing is also called line drawing, which is simply drawing with lines. In line drawing, lines can have many changes, such as length, thickness, straightness, density, weight, rigidity and rhythm. When drawing lines, we should pay attention to correctly representing the occlusion relationship between the front and back of the object image. Generally speaking, the baseline of the near object in the picture should be lower than that of the far object. In order to better express the beauty of lines, we can't draw what we see in sketches, but choose and refine them purposefully through comparison and feeling. Commonly used straight lines are straight lines, arcs, curves and polylines.

Sketch is a formal artistic creation, with monochrome lines.

It is also possible to express things in the intuitive world.

Ideas, concepts, attitudes, feelings, fantasies, symbols and even abstract forms. It does not pay attention to the whole and color like painting, but to the structure and form.