new basic teaching series
Regular gypsum geometry
Gypsum geometry is the most basic course
is also a compulsory course for us to draw gypsum and still life
You must spend more time mastering and understanding
Then follow Xiaozhi to learn!
—Xiaozhi Team—
① Cubes are often practiced by beginners when learning perspective and expressing volume. The near and far are small, which are natural phenomena of vision. The perspective relationship between near and far is small, which uses the perspective relationship between near and far, to express the front and back space and volume sense of the object, thereby showing the three-dimensional volume space in a two-dimensional picture. This is one of the most important knowledge points we need to learn by drawing cubes.
② Sphere is difficult for beginners to deal with, because it is more difficult to draw a round shape than a cube. Secondly, it is difficult to perform the volume of the sphere well. When drawing, we can use the structural lines of the sphere to find the shape of the outer contour and constantly modify it. We must practice more when drawing a relatively perfect shape!
③ Octal prism body structure is also one of the basics that beginners must master. To draw the shape of the octane, you need to use auxiliary lines to accurately draw the shape. At the same time, you should pay attention to the perspective relationship of the lines. It is not absolutely parallel, but disappears at the vanishing point, so that the shape has a sense of space.
④ pyramid is composed of 4 triangles (a pyramid with a square bottom is called a square cone, a pyramid with a triangle bottom is called triangular pyramid , a pyramid with a pentagonal bottom is called a pentagonal top, and a pyramid with a round bottom is called cone ). After we have determined its structure, we must not draw it wrong when drawing, for example, if the triangle on which side is larger or smaller, it will cause the shape to deviate, so we should pay special attention to it during the shape formation stage.
⑤ The first picture is to cut a cylinder obliquely, so that the ellipse of the cut and the circle behind it form a perspective difference, which is more conducive to students to understand the structure. Chapter 2 The complete cylinder is very regular. At the same time, we can find that the cylinder can be cut out through a cuboid, which can completely wrap itself in it.
⑥The following belongs to polyhedrons (the polyhedron composed of 12 pentagons is called a regular 12hedron, and the polyhedron composed of 20 triangles is called a regular 20hedron). This polyhedral is relatively complex in shape and structure. We need to master the basic geometry before learning, so that it will be easier to draw.
⑦The following geometry is composed of two pentaprisms, which also belongs to advanced geometric training. Drawing these types of geometry requires consideration of the changes in shape in many aspects, which is relatively richer in perspective, but relatively rules, it is relatively easy to draw as long as you find the rules in it.
⑧The geometry below is composed of a rectangle and a square cone. cuboid has a certain inclination. The perspective change of a geometry formed in this way is the most complex. It is recommended that students draw the two geometric bodies separately, first draw the square cone and then draw the cube. It is important to pay attention to the perspective relationship between the two. Once they are not sure, they will feel that the two geometric bodies are not in the same space.
⑨The same geometric body consists of a cone and a cylinder, which is more difficult, has more circles, and has more perspective. There is a small trick when drawing a cylinder, which is to first draw a rectangle, and then draw a cylinder inside (as shown in the picture). This method is very beneficial to students' understanding, and the circles in front and back of the cylinder are not easy to draw crookedly. Whether it is placed normally or upside down, it requires a lot of practice time to master it!
① Then we will draw some basic gypsum combinations, similar to simple combinations such as a cube and a cuboid, a cube and a sphere. You can try more and try different angles, upside down and oblique ways. Don’t draw too many things, just draw the shape well. The purpose of this is to lay the foundation for drawing a complete sketch of still life. The still life combination has an occlusion relationship and a spatial relationship. It is necessary to ensure that the spaces of the two are the same. One cannot be looked down and the other is looking up. Such a spatial relationship is not true.
②After trying some left and right placement and front and back placement, you can also try to superimpose up and down like the works in the picture below. To make the still life above steadily place it on top, the perspective relationship between the two still lifes must be correct. This combination is also to train students' spatial processing ability and will be very helpful for later learning.
① Finally, let’s try three types of gypsum and a combination form with a little tone. First of all, the combination of the three types of gypsum tests the students’ picture processing ability. At the same time, the main object combination in conventional still life combinations is generally about three, so this kind of exercise is very beneficial for students to plan the arrangement of the picture. Here we will talk about composition (there will be a special topic for composition knowledge points). Then there is the tone. We only need to find the dark parts and projections of the gypsum geometry, and then unify them. We can also slightly increase some important places. We must not draw too much. Our main purpose is to understand the shape. Taking a little tone is just to make students more familiar with the painting steps and have a little awareness of light and shadow.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-