What Is Oblique Drawing?
Oblique drawing is a drawing in which the front view of the object is drawn to the correct size, and its side surfaces are drawn at an angle to give a pictorial appearance.
An oblique drawing can show an accurate front view of the object without distortion. Generally, an object’s face is called the front view.
Oblique drawings are usually used by them in the marketing department to explain the product and its features, to give a real idea of the object while processing the business.
Tracing drawing is also called the crudest “3D” drawing. This is the easiest way to master. Can be used to draw the side you are looking at in the dimensions of any object using diagonal view. Then the other sides of the object are drawn at an angle of 45. But instead of drawing the full size of the sides, half of its length is drawn. In this way, the concept of an object as reality comes in the drawing.
Oblique drawing is similar to isometric drawing. In the oblique drawing, the view of the object is parallel to the plan. And in isometric drawing, the object is drawn along the plan at an angle of 30. The angle of elevation on the side of the oblique drawing is kept at an angle of 30° to 60◦.
We may have seen many three-dimensional objects like a table, kitchen, basketball, etc. in our daily life around us. Now a three-dimensional object can be easily drawn on a two-dimensional plane with the oblique drawing.
Oblique drawing is a type of technical drawing used for the construction of two-dimensional (2D) images of three-dimensional (3D) objects.
Oblique drawing is not a thing but a technique to create a view of it. Which can be used to display useful images for understanding.
A cube is composed of a three-dimensional object. But let’s get an idea of how to draw a cube drawn on paper.
You all know that the paper plane is two-dimensional. But a cube-like three-dimensional solid can be drawn on paper.
Diagonal projection and th orthographic projection are used to draw approximately parallel lines in the image through parallel lines of the object.
Oblique Projection was universally used by Chinese artists from the 1st to the 18th century. House-like objects and objects were displayed by Chinese artists.
Technical projection generally used diagonal projections. The fortifications were used by French military artists in the 18th century to show fortifications.
In the new century of computer graphics can now be designed using a variety of graphical projection techniques. These may include computer-aided design (CAD), computer games, computer-generated animation, and special graphical effects used in movies.
The Following Points Are Kept in Mind While Drawing a Diagonal Sketch
The front and back of the transverse sketch are to be kept the same size.
All the sizes are different in the cube but all the sizes are kept the same in the oblique drawing.
Procedure for Oblique Drawing – Example
Oblique drawing can be defined as a diagram depicting the perspective of an object in three dimensions.
Let us draw a 4 × 4 × 4 cube oblique drawing of the object on paper.
Step 1. For oblique drawing 4 × 4 × 4 cubes, take a square paper with lining as shown below.
Step 2. Draw a 4 × 4 cube according to the shape of the front view. Which is shown below.
Step 3. Draw a 4 × 4 cube according to the shape of the back view as shown above. Which is shown below.
Step 4. Now join the corresponding angles as shown in the figure below to give the shape of the cube.
Step 5. Show the hidden edges as dotted lines as shown in the figure.
An oblique drawing representing a cube of dimension 4 × 4 × 4 is ready which you can see.
Types of Oblique Drawing
- Cavalier Oblique Drawing
- Cabinet Oblique Drawing
- General Oblique Drawing
Cavalier Oblique Drawing
In this type of method, the side face of the object is measured in actuality and it is made according to the actual size in the drawing.
Usually, in a drawing, a point of the object is represented by three coordinates, x, y and z.
On the drawing, the drawing of the object is represented by only two coordinates, “x “and” y”. The figure of an object on a flat drawing has two axes, x, and y while z is perpendicular. The length on these axes is drawn on a 1: 1 scale.
This type of drawing is similar to dimetric projections. However, it cannot be called an axonometric projection. Because in this type of projection the y axis is drawn diagonally. Which usually represents an arbitrary angle along the x-axis. Usually, the y axis forms an angle of 30 or 45 with the x-axis. The length of the third axis cannot be measured.
Cabinet Oblique Drawing
A diagonal drawing where half of the actual size of the side of the object is taken. In cabinet diagonal drawings, they are shortened by half of their true length to compensate for distortions and so that the human eye can study well. This is why cabinet drawings are the most used.
General Oblique Drawing
In this type of oblique drawing, two-thirds of the actual size of the object is taken to represent the side of the object.