NDLI: Illustrating design and spatial assembly of interactive CSG

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Illustrating design and spatial assembly of interactive CSG

Content Provider	ACM Digital Library
Author	Döllner, Jürgen Kirsch, Florian Nienhaus, Marc
Abstract	For the interactive construction of CSG models understanding the layout of the models is essential to ease their efficient manipulation. To comprehend position and orientation of the aggregated components of a CSG model, we need to realize its visible and occluded parts as a whole. Hence, transparency and enhanced outlines are key techniques to communicate deeper insights.We present a novel real-time non-photorealistic rendering technique that illustrates design and spatial assembly of CSG models.As enabling technology we first present a solution for combining depth peeling with image-based CSG rendering. The rendering technique can then extract layers of ordered depth from the CSG model up to its entire depth complexity. Capturing the surface colors of each layer and combining the results thereafter synthesizes order-independent transparency as one major illustration technique for interactive CSG.We further define perceptually important edges of CSG models and integrate an image-space edge-enhancement technique that can detect them in each layer. In order to outline the model's layout, the rendering technique extracts perceptually important edges that are directly visible, i.e., edges that lie on the model's outer surface, or edges that are occluded, i.e., edges that are hidden by its interior composition. Finally, we combine these edges with the order-independent transparent depictions to generate edge-enhanced illustrations, which provide a clear insight into the CSG models, let realize their complex, spatial assembly, and, thus, simplify their interactive construction.
Starting Page	91
Ending Page	98
Page Count	8
File Format	PDF
ISBN	1595932887
DOI	10.1145/1108590.1108605
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2006-01-25
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Real-time rendering Image-based csg Non-photorealistic rendering
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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