What Is Hatching in CAD Programs?
Hatching is a filled region that expresses how a drawn object is used, made, or composed. The hatching tool in CAD is analogous to the fill or paint bucket in many popular drawing and painting programs; it fills a region with a pattern or color.
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Solid vs. Void
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The hatching tool can depict whether an object drawn in CAD is a solid or a void. In other words, the hatch expresses whether the lines define mass or empty space.
Material
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Hatching can represent an object's material. For example, evenly spaced diagonal lines represent a material as masonry, whereas a hatch composed of many dots or specks represents sediment or concrete. Every building material has a conventional hatching pattern.
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Use
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Different hatch patterns over individual spaces can represent different uses. For example, a grid may represent a bathroom or kitchen, and a bedroom may have a dotted hatch. There are not conventions for hatching by room use; you can use whichever patterns you prefer.
Color
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Hatching can be used simply for color. The colors can represent materials or uses in drawings and renderings. There aren't any conventions for use of color in architecture. However, many other disciplines, such as urban planning and cartography, prescribe uses for colors in drawings and maps.
Rendering Method
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Hatching originally was used by artists for shading, shadow, and modeling. Hatching patterns are still used in this way today by artists and architects.
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References
Resources
- Photo Credit Haarlineal auf technischer Zeichnung image by Ralph Klein from Fotolia.com
