NDLI: Realistic grass withering simulation using time-varying texels

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Realistic grass withering simulation using time-varying texels

Content Provider	ACM Digital Library
Author	Wu, Enhua Jiao, Shaohui Heng, PhengAnn
Abstract	Grass is one of the crucial elements in representing real nature scenes. Various methods have been proposed for grass simulation, for example, Boulanger and his colleagues render realistic grass in real-time with dynamic lighting, shadows and animations. Till now, few approaches have investigated the realistic simulation of withering grassland which is still a big challenge in computer graphics, due to the great complexity of both geometry and withering mechanism. In our work, a novel concept called Time-Varying Texels (TVT) is proposed to extend the static texel[Kajiya and Kay 1989] and make it time-serialized. In a grass TVT structure, time-dependent texels are arranged hierarchically in a Time-Space Partitioning (TSP) tree, so that the grass withering process can be efficiently approximated, with acceptable spatial and temporal errors. In this way we facilitate LOD rendering. Traditional texel structures could hardly undertake physical based calculation in each grass blade, so we introduce a point based structure (PBS) to increase the flexibility. Dynamic processes such as geometric deformation and material transformation can be achieved on PBS during the whole withering procedure. Additionally, by clustering the pre-computed TVT samples in low densities using a mingling algorithm, we obtain high-density grass TVT so as to significantly improve the efficiency of TVT generation.
Starting Page	1
Ending Page	1
Page Count	1
File Format	PDF
DOI	10.1145/1667146.1667169
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2009-12-16
Publisher Place	New York
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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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
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