Editing Technical drawing (section)

===Technical illustration===
[[File:Drum set.svg|thumb|[[Technical illustration|Illustration]] of a drum set]]

{{Main article|Technical illustration}}

''Technical illustration'' is the use of [[illustration]] to visually communicate information of a technical nature. Technical illustrations can be component technical drawings or [[diagram]]s. The aim of technical illustration is "to generate expressive [[image]]s that effectively convey certain [[information]] via the visual channel to the human observer".<ref name="ViGr05">Ivan Viola and Meister E. Gröller (2005). "Smart Visibility in Visualization". In: ''Computational Aesthetics in Graphics, Visualization and Imaging''. L. Neumann et al. (Ed.)</ref>

The main purpose of technical illustration is to describe or explain these items to a more or less nontechnical audience. The visual image should be accurate in terms of dimensions and proportions, and should provide "an overall impression of what an object is or does, to enhance the viewer's interest and understanding".<ref>{{cite web|url=http://www.industriegrafik.com/TIE1.htm |title=The Role of the Technical Illustrator in Industry |date=15 June 2002 |website=industriegrafik.com |archive-url=https://web.archive.org/web/20090814125052/http://www.industriegrafik.com/TIE1.htm |archive-date=14 August 2009 |url-status=dead |access-date=15 February 2009}}</ref>

According to Viola (2005), "illustrative techniques are often designed in a way that even a person with no technical understanding clearly understands the piece of art. The use of varying line widths to emphasize mass, proximity, and scale helped to make a simple line drawing more understandable to the lay person. Cross hatching, stippling, and other low abstraction techniques gave greater depth and dimension to the subject matter".<ref name="ViGr05"/>

====Cutaway drawing====
[[File:1942 Nash Ambassador X-ray.jpg|thumb|[[Cutaway drawing]] of the [[Nash 600]], an American car of the 1940s]]
{{Main article|Cutaway drawing}}

A ''cutaway drawing'' is a technical illustration, in which part of the surface of a three-dimensional model is removed in order to show some of the model's interior in relation to its exterior.

The purpose of a cutaway drawing is to "allow the viewer to have a look into an otherwise solid opaque object. Instead of letting the inner object shine through the surrounding surface, parts of outside object are simply removed. This produces a visual appearance as if someone had cutout a piece of the object or sliced it into parts. Cutaway illustrations avoid ambiguities with respect to spatial ordering, provide a sharp contrast between foreground and background objects, and facilitate a good understanding of spatial ordering".<ref name="DWE03">{{cite web|url=http://www.vis.uni-stuttgart.de/~weiskopf/publications/eg2003.pdf |title=Interactive Cutaway Illustrations |last1=Diepstraten |last2=Weiskopf |last3=Ertl |first1=J. |first2=D. |first3=T. |date=2003 |website=vis.uni-stuttgart.de |archive-url=https://web.archive.org/web/20051216005911/http://www.vis.uni-stuttgart.de/~weiskopf/publications/eg2003.pdf |archive-date=16 December 2005 |url-status=dead}} in {{cite journal|journal=Eurographics |title=Eurographics 2003 |editor1-last=Brunet |editor1-first=P. |editor2-last=Fellner |editor2-first=D. |volume=22 |issue=3 |publisher=The Eurographics Association and Blackwell Publishers}}</ref>
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