Principle
Type | Contrast | Resulting Attribute |
Curved Line | Maximum | Emotionally Active Esthetically Dynamic Spatially In Depth |
Straight Line | Minimum | Emotionally Passive Esthetically Decorative Spatially Static |
A curved line is dynamic, ever changing. It has more contrast than a straight line and it is more naturalistic.
The straight line is more monotonous, has less contrast, and is more static in character. But the straight line is more exact, so architects use the straight line to simplify building requirements.
Examples

The Bull sculpture by Robert McKnight illustrates the qualities of curved lines.

The above image shows the Great Pyramid of Giza as it likely looked in antiquity. Visually, the straight lines emphasize stability and permanence.
Applications
The dynamic qualities of the curved line can be combined with the decorative qualities of the straight line by using a curved line with a continuous ratio so that it becomes repetitive and, therefore, decorative. The spiral is such a curved line, a favorite of wrought iron workers as well as great painters like Gauguin and Matisse.
This landscape by Gaugin combines straight and curved lines to create a decorative effect.

Putting horizontal lines in the bottom of a picture, vertical lines in the middle, and diagonal lines at the top increases the decorative quality of line by its multiple, repeated use.

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The Elements | ||
Line | Line Direction | Shape |
Size | Texture | Value |
Color | ||
Other Topics | ||
The Attributes | Composition | The Picture Plane |
About the Authors | ||
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