This paper proposes a novel strategy based on fragment meshes of Shiue et al. for GPU rendering of compos- ite subdivision surfaces. Two enumeration systems are established to label the primitives of each fragment mes...This paper proposes a novel strategy based on fragment meshes of Shiue et al. for GPU rendering of compos- ite subdivision surfaces. Two enumeration systems are established to label the primitives of each fragment mesh. A sector-layer-index enumeration system is responsible for retrieving proximities for subdivision masks while a sec- tor-index enumeration system designates a 2D texture buffer in GPU. Recurring to the free conversion between them, our approach may get rid of lookup tables that are designed to record subdivision masks. In addition, relatively small composite subdivision masks make it easy to develop automatically retrieving techniques. Finally, as center vertices are often irregular, their computation is related to an average with alterable number of items. Considering that variable loop is not efficient in GPU, we evaluate the center vertex of each fragment mesh using the linear combination of its level 0, level 1 and limit positions instead of averaging schemes. Experiments demonstrate that our approach generally outper- forms that of Shiue et al. in FPS by a long way.展开更多
Weifang,in East China's Shandong Province,is known as the world's capital of kites,Chinese paintings and Chinese epigraphy.It has guqin,a traditional Chinese stringed musical instrument,and paper-cutting liste...Weifang,in East China's Shandong Province,is known as the world's capital of kites,Chinese paintings and Chinese epigraphy.It has guqin,a traditional Chinese stringed musical instrument,and paper-cutting listed as masterpieces of the Oral and Intangible Heritage of Humanity by the United Nations Educational,Scicentific and Cultural Organization(UNESCO).展开更多
Modeling is the kernel part of a digital reactor system. As an extensible platformfor reactor conceptual design, it is very important to study modeling technology and develop somekind of tools to speed up preparation ...Modeling is the kernel part of a digital reactor system. As an extensible platformfor reactor conceptual design, it is very important to study modeling technology and develop somekind of tools to speed up preparation of all classical computing models. This paper introducesthe background of the project and basic conception of digital reactor. MCAM is taken as anexample for modeling and its related technologies used are given. It is an interface program forMCNP geometry model developed by FDS team (ASIPP & HUT), and designed to run on windowssystem. MCAM aims at utilizing CAD technology to facilitate creation of MCNP geometry model.There have been two ways for MCAM to utilize CAD technology: (1) Making use of user interfacetechnology in aid of generation of MCNP geometry model; (2) Making use of existing 3D CADmodel to accelerate creation of MCNP geometry model. This paper gives an overview of MCAM'smajor function. At last, several examples are given to demonstrate MCAM's various capabilities.展开更多
For hundreds of years,Tongxiang,A city in East China's Zhejiang Provinec,has been known for its exquisite,gaily colored paintings on kitchen stoves.In June 2011,China added the paintings to the list of the country...For hundreds of years,Tongxiang,A city in East China's Zhejiang Provinec,has been known for its exquisite,gaily colored paintings on kitchen stoves.In June 2011,China added the paintings to the list of the country's items of intangible cultural heritage.展开更多
基金supported by Natural Science Foundation of China (60973084)Fundamental Research Funds for the Central Universities (2012zz0063)
文摘This paper proposes a novel strategy based on fragment meshes of Shiue et al. for GPU rendering of compos- ite subdivision surfaces. Two enumeration systems are established to label the primitives of each fragment mesh. A sector-layer-index enumeration system is responsible for retrieving proximities for subdivision masks while a sec- tor-index enumeration system designates a 2D texture buffer in GPU. Recurring to the free conversion between them, our approach may get rid of lookup tables that are designed to record subdivision masks. In addition, relatively small composite subdivision masks make it easy to develop automatically retrieving techniques. Finally, as center vertices are often irregular, their computation is related to an average with alterable number of items. Considering that variable loop is not efficient in GPU, we evaluate the center vertex of each fragment mesh using the linear combination of its level 0, level 1 and limit positions instead of averaging schemes. Experiments demonstrate that our approach generally outper- forms that of Shiue et al. in FPS by a long way.
文摘Weifang,in East China's Shandong Province,is known as the world's capital of kites,Chinese paintings and Chinese epigraphy.It has guqin,a traditional Chinese stringed musical instrument,and paper-cutting listed as masterpieces of the Oral and Intangible Heritage of Humanity by the United Nations Educational,Scicentific and Cultural Organization(UNESCO).
基金The project supported by Centurial Project ("Bai-Ren-Ji-Hua" Project) of Chinese Academy of Sciences. And supported by NSFC (No. 60273044) and NSF of Anhui Province (No. 01042201)
文摘Modeling is the kernel part of a digital reactor system. As an extensible platformfor reactor conceptual design, it is very important to study modeling technology and develop somekind of tools to speed up preparation of all classical computing models. This paper introducesthe background of the project and basic conception of digital reactor. MCAM is taken as anexample for modeling and its related technologies used are given. It is an interface program forMCNP geometry model developed by FDS team (ASIPP & HUT), and designed to run on windowssystem. MCAM aims at utilizing CAD technology to facilitate creation of MCNP geometry model.There have been two ways for MCAM to utilize CAD technology: (1) Making use of user interfacetechnology in aid of generation of MCNP geometry model; (2) Making use of existing 3D CADmodel to accelerate creation of MCNP geometry model. This paper gives an overview of MCAM'smajor function. At last, several examples are given to demonstrate MCAM's various capabilities.
文摘For hundreds of years,Tongxiang,A city in East China's Zhejiang Provinec,has been known for its exquisite,gaily colored paintings on kitchen stoves.In June 2011,China added the paintings to the list of the country's items of intangible cultural heritage.
