In particular, sketchy drawings encourage the exchange of ideas when people are reconsidering drafts. In contrast, rendering in a "sketchy" manner can be used to communicate visual ideas and to illustrate drafts and concepts, especially in application areas such as architectural and product designs. For instance, they can help guide players through dungeon-like environments and highlight hidden chambers and components in a computer game, or they can make it easier for artists to visualize and design game levels in a custom level editor. In this sense, blueprint rendering can become an effective tool for interactively exploring, visualizing, and communicating spatial relations. Thus, blueprints make it easy to understand the structure of complex, hierarchical object assemblies such as those found in architectural drafts, technical illustrations, and designs. The word blueprint in its original sense is defined by Merriam-Webster as "a photographic print in white on a bright blue ground or blue on a white ground used especially for copying maps, mechanical drawings, and architects' plans." Blueprints consist of transparently rendered features, represented by their outlines. Blueprint rendering is a novel multipass rendering technique that outlines visible and nonvisible visually important edges of 3D objects. Outlining and enhancing visible and occluded features in drafts of architecture and technical parts are essential techniques for visualizing complex aggregate objects and for illustrating the position, layout, and relation of their components. In this chapter, we present two techniques for hardware-accelerated, image-space non-photorealistic rendering: blueprint rendering and sketchy drawing. University of Potsdam, Hasso-Plattner-Institute Blueprint Rendering and "Sketchy Drawings" The CD content, including demos and content, is available on the web and for download.Ĭhapter 15. ![]() You can purchase a beautifully printed version of this book, and others in the series, at a 30% discount courtesy of InformIT and Addison-Wesley. GPU Gems 2 GPU Gems 2 is now available, right here, online.
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