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Three-dimensional objects can be represented on a two-dimensional plane easily if appropriately drawn. Oblique sketching is a method of representing 3-D objects on a 2-D plane. Although oblique sketches are capable enough to project the correct image of the object, the actual measurement of the object may vary as compared to the image projected on a two-dimensional plane. To overcome this limitation, the isometric sketch is used, which portrays the exact measurement of the object along with the projection of its image on two dimensions. Important points of an isometric drawing are:
The meaning of isometric is having equal measurements or dimensions.
In an isometric sketch, the image of the object is drawn in such a manner that the original dimension of the object is intact irrespective of its position.
Isometric sketching allows us to draw an object in the three-dimensions. This kind of sketching is often used by illustrators, engineers that specialize in the technical drawings.
Rules for Isometric Sketching
Some of the rules for the isometric sketching are as follows:
We know that an isometric object can be drawn using vertical lines and horizontal lines. In the isometric drawing, the vertical lines will stay vertically, whereas the horizontal lines are drawn at an angle of 30-degree to the horizontal plane.
The angle between all the three axes of the coordinate plane must be equal to 120 degrees. If you follow rule 1, then rule 2 can be automatically achieved.
The isometric projection displays the three faces of an object, and they all are uniformly foreshortened.
Uses of Isometric Sketch
Any objects that can be drawn using the isometric projection gives a clear perception of the object.
From the isometric sketching, one can take actual measurements of the object.
Isometric projections should be extensively used in the situation when if you have a product idea in mind, and you want to show it to your Boss or an Investor. It would help if you showed your plan by drawing it using the isometric sketching.
It is broadly used by the various professionals such as Game Designers, Architects, Interior designers, Infographics and so on.
Isometric Sketching Example
An example to draw the isometric sketching is given below. Follow the steps given to draw an isometric sketch of an 8 × 3 × 3 cuboid.
1. To draw an isometric sketch of a cuboid with dimension 8 × 3 × 3, take an isometric dot paper as shown below:
Isometric sketch - step 1
Isometric Dot Paper
2. To draw the front face, join 8 dots to form the length of the cuboid and 3 adjacent dots to form its breadth as shown:
Isometric sketch - step 2
Isometric Sketch
3. From the corners of the rectangle drawn above, draw 4 parallel line segments as shown below:
Isometric sketch - step 3
4. Join the corners of the image together as shown below:
Isometric sketch - step 4
5. According to the convention redraw the hidden edges as dotted lines as shown:
Isometric sketch - step 5
This isometric sketch representing a cuboid of dimension 8 × 3 ×3. Thus, using isometric dot sheet, we can draw three-dimensional shapes of exact measurements or dimensions without any ambiguity.
Thus, isometric sketches of different shapes can be drawn easily. Learn more about the isometric sketch and other solid shapes download BYJU’S- The Learning App from Google Play Store. Join us and fall in love with learning.
Step-by-step explanation:
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