Measuring Lengths and Angles in Pencil Drawings
This is another stage of a typical pencil drawing, because you have come to the stage when you need to settle the units on the paper properly and take care of the angles.
Let’s get down to the typical units.
Basic Length Unit – A basic length unit is the length of a line segment of medium size relative to the composition. That means a line segment that is not too long and not too short.
1. Life Unit – First, we choose a basic length unit for the real scene you want to draw. For a large life scene you can do this by holding a pencil at arm’s length with locked elbow. Then, with one eye closed, you can measure a basic unit along your pencil using your thumb as a marker.
If you work with a photograph you can measure your basic unit with your pencil directly on the photograph. Let us call this basic length unit the “Life Unit”. Draw this Life Unit on a separate piece of paper.
2. Ground Unit – Now, you also need a basic length for your actual drawing. Indeed, the size of the real scene will usually be different from the one you will realize on your paper. Again, use your pencil to choose a basic unit suitable for your ground and call it the “Paper Unit”. Draw it next to the Life Unit.
How to Use Your Basic Units – Now we can use the Life Unit to measure any length on the real composition. We express these lengths in terms of the number of Life Units. For example, you will speak of this table leg being about half a Life Unit or this hat sits 1.5 Life Units to the left of that umbrellaangle. The same angle is then realized on your paper.
The above suggestions will give you a good start with estimating lengths and angles in a systematic manner. With some practice, you will be able to do this without thinking.
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