Measuring is a line of known or ascertainable length put into or allowed to remain in a picture (as a linear perspective or a photograph) and often used in the determination or measurement of other lines.
We already have Tilt your pencil to align with a feature in your image. Then next compare it to the horizontal border of your canvas. You can also mentally run a horizontal straight across the pencil to get a better idea. To measure, you will compare back and forth the measurements to ensure they are precise.
Your pencil can be used as a measuring tool to gauge relative scale of objects and also as a way to determine approximate angles of objects or areas allowing them to assume the illusion of perspective. The relationship between your pencil and the measurments will be the proportions you transfer to your picture plane.
Linear Perspective -- (ex. Railroad Tracks)
Horizon Line -- (ex. Where the sky meets the land)
1 Point Perspective -- (the simplest, least common)
2 Point Perspective
3 Point Perspective
Vanishing Point sits on Horizon Line
- The Horizon line is equal with your eye level.
- Parallel lines receding into the distance converge to a Vanishing Point on the Horizon Line.
- In 1 point perspective the front faces of object face the viewer.
- In 2 point perspective the corner of objects face the viewer.
Proportion in art is concerned with size. Scale refers to the size of an object (a whole) in relationship to another object (another whole). In art the size relationship between an object and the human body is significant.
When you know what a given proportion is, you can double-check it in your drawing.
- Take your pencil and align it with the given dimension in the drawing.
- Use your index finger, mark this dimension on the pencil.
- Keeping your finger still, re-align the pencil with the larger dimension you checked on that model.
- Check how many times the smaller dimension in your drawing fits into the larger one.
The Value is the lightness or darkness of tones or colors. White is the lightest value; black is the darkest. The value halfway between these extremes is called middle gray. Space An element of art by which positive and negative areas are defined or a sense of depth achieved in a work of art.