Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001最新文献_第3页

Non-photorealistic rendering using watercolor inspired textures and illumination 使用水彩启发纹理和照明的非真实感渲染

Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001 Pub Date : 2001-10-16 DOI: 10.1109/PCCGA.2001.962888

E. Lum, K. Ma

引用次数: 55

Sharp features on multiresolution subdivision surfaces 多分辨率细分表面上的尖锐特征

Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001 Pub Date : 2001-10-16 DOI: 10.1109/PCCGA.2001.962867

H. Biermann, Ioana M. Boier-Martin, D. Zorin, F. Bernardini

引用次数: 79

A physical 3D trackball 一个实体3D轨迹球

Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001 Pub Date : 2001-10-16 DOI: 10.1109/PCCGA.2001.962866

Myung-Soo Kim, Joon-Kyung Seong, Dae-Eun Hyun, Kang-Hoon Lee, Yoo-Jin Choi

引用次数: 6

Adaptive smoothing tangential direction fields on polygonal surfaces 多边形表面的自适应平滑切向场

Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001 Pub Date : 2001-10-16 DOI: 10.1109/PCCGA.2001.962872

Y. Ohtake, Masahiro Horikawa, A. Belyaev

引用次数: 18

Integrating physics-based modeling with PDE solids for geometric design 整合基于物理的建模与PDE实体的几何设计

Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001 Pub Date : 2001-10-16 DOI: 10.1109/PCCGA.2001.962873

Haixia Du, Hong Qin

{"title":"Integrating physics-based modeling with PDE solids for geometric design","authors":"Haixia Du, Hong Qin","doi":"10.1109/PCCGA.2001.962873","DOIUrl":"https://doi.org/10.1109/PCCGA.2001.962873","url":null,"abstract":"PDE techniques, which use partial differential equations (PDEs) to model the shapes of various real-world objects, can unify their geometric attributes and functional constraints in geometric computing and graphics. This paper presents a unified dynamic approach that allows modelers to define the solid geometry of sculptured objects using the second-order or fourth-order elliptic PDEs subject to flexible boundary conditions. Founded upon the previous work on PDE solids by Bloor and Wilson (1989, 1990, 1993), as well as our recent research on the interactive sculpting of physics-based PDE surfaces, our new formulation and its associated dynamic principle permit designers to directly deform PDE solids whose behaviors are natural and intuitive subject to imposed constraints. Users can easily model and interact with solids of complicated geometry and/or arbitrary topology from locally-defined PDE primitives through trimming operations. We employ the finite-difference discretization and the multi-grid subdivision to solve the PDEs numerically. Our PDE-based modeling software offers users various sculpting toolkits for solid design, allowing them to interactively modify the physical and geometric properties of arbitrary points, curve spans, regions of interest (either in the isoparametric or nonisoparametric form) on boundary surfaces, as well as any interior parts of modeled objects.","PeriodicalId":387699,"journal":{"name":"Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121519051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Modeling realistic virtual hairstyles 模拟现实的虚拟发型

Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001 Pub Date : 2001-10-16 DOI: 10.1109/PCCGA.2001.962885

Yizhou Yu

引用次数: 70

Direct reconstruction of displaced subdivision surface from unorganized points 从无组织点直接重建位移细分表面

Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001 Pub Date : 2001-10-16 DOI: 10.1109/PCCGA.2001.962869

W. Jeong, Chang-Hun Kim

{"title":"Direct reconstruction of displaced subdivision surface from unorganized points","authors":"W. Jeong, Chang-Hun Kim","doi":"10.1109/PCCGA.2001.962869","DOIUrl":"https://doi.org/10.1109/PCCGA.2001.962869","url":null,"abstract":"We propose a new mesh reconstruction algorithm that produces a displaced subdivision mesh directly from unorganized points. The displaced subdivision surface is a new mesh representation that defines a detailed mesh with a displacement map over a smooth domain surface. This mesh representation has several benefits-compact mesh size, piecewise regular connectivity-to overcome limitations of an irregular mesh produced by an ordinary mesh reconstruction scheme, but the original displaced subdivision surface generation algorithm needs an explicit polygonal mesh to be converted. Our approach is producing displaced subdivision surface directly from input points during the mesh reconstruction process. The main ideas of our algorithm are building initial coarse control mesh by the shrink-wrapping like projection and sampling fine surface detail from unorganized points along the each limit vertex normal without any connectivity information of given points. We employ an existing subdivision surface fitting scheme to generate a parametric domain surface, and suggest a surface detail sampling scheme that determines a valid sampling triangle which can be made with combinations of input points. We show several reconstruction examples and applications to show the validity of suggested sampling technique and benefits of the result like multiresolution modeling.","PeriodicalId":387699,"journal":{"name":"Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131947255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 58

Stream bubbles for steady flow visualization 流气泡稳定流动可视化

Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001 Pub Date : 2001-10-16 DOI: 10.1109/PCCGA.2001.962870

Bing Zhang, A. Pang

{"title":"Stream bubbles for steady flow visualization","authors":"Bing Zhang, A. Pang","doi":"10.1109/PCCGA.2001.962870","DOIUrl":"https://doi.org/10.1109/PCCGA.2001.962870","url":null,"abstract":"This paper introduces a new relatively inexpensive technique - stream bubbles for 3D flow visualization. The physical analogy to this technique are bubbles that can be observed in nature with different shapes and varying speeds. A stream bubble is a surface, defined by a small set of vertices, advected through a flow field. It can easily manifest flow features like twist, stretch, expansion and rotation. Upon encountering an obstacle, stream bubbles will automatically erode and/or split in an intuitively geometric way. For highly divergent and vortical fields, it can also break apart based on the aspect ratio of the bounding volume. When two or more stream bubbles meet, no explicit merge operation is needed since the surfaces will simply intersect each other to form a composite surface. No effort is made to make the intersection smooth. Stream bubbles may be of different sizes. Larger bubbles give a coarse global view of the flow structure, while smaller ones give a more accurate depiction. In addition, our interface provides an interactive, multi-resolution visualization environment facilitated with an animated or step-by-step playback function.","PeriodicalId":387699,"journal":{"name":"Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122732863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Dual mesh resampling 双网格重采样

Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001 Pub Date : 2001-10-16 DOI: 10.1109/PCCGA.2001.962871

G. Taubin

{"title":"Dual mesh resampling","authors":"G. Taubin","doi":"10.1109/PCCGA.2001.962871","DOIUrl":"https://doi.org/10.1109/PCCGA.2001.962871","url":null,"abstract":"The dual of a 2-manifold polygonal mesh without boundary is commonly defined as another mesh with the same topology (genus) but different connectivity (vertex-face incidence), in which faces and vertices occupy complementary locations and the position of each dual vertex is computed as the center of mass (barycenter or centroid) of the vertices that support the corresponding face. This barycenter dual mesh operator is connectivity idempotent but not geometrically idempotent for any choice of vertex positions, other than constants. In this paper we construct a new resampling dual mesh operator that is geometrically idempotent for the largest possible linear subspace of vertex positions. We look at the primal and dual mesh connectivities as irregular sampling spaces, and at the rules to determine dual vertex positions as the result of a resampling process that minimizes signal loss. Our formulation, motivated by the duality of Platonic solids, requires the solution of a simple least-squares problem. We introduce a simple and efficient iterative algorithm closely related to Laplacian smoothing, and with the same computational cost. We also characterize the configurations of vertex positions where signal loss does and does not occur during dual mesh resampling, and the asymptotic behavior of iterative dual mesh resampling in the general case. Finally, we describe the close relation existing with discrete fairing and variational subdivision, and define a new primal-dual interpolatory recursive subdivision scheme.","PeriodicalId":387699,"journal":{"name":"Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127082983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 39

3D geometry compression recent advances and challenges 三维几何压缩的最新进展和挑战

Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001 Pub Date : 2001-10-16 DOI: 10.1109/PCCGA.2001.962851

G. Taubin

{"title":"3D geometry compression recent advances and challenges","authors":"G. Taubin","doi":"10.1109/PCCGA.2001.962851","DOIUrl":"https://doi.org/10.1109/PCCGA.2001.962851","url":null,"abstract":"Polyhedral models, which are used in most graphics applications, require considerable amounts of storage, even when they only approximate precise shapes with limited accuracy. To support internet access to 30 models of complex virtual environments or assemblies for electronic shopping, collaborative CAD, multi-player video games, scientific visualization, representations of 30 shapes must be compressed by several orders of magnitude. In this talk I will describe the state of the art in schemes for lossy and loss-less compression of triangle and polygonal meshes, including progressive approaches. In additions to single-resolution compression schemes for triangle and polygonal meshes, which result in compressed formats of less than a byte per triangle, multiresolution progressive rejinement approaches have advanced to the point of challenging the best single resolution schemes in compression eficiency. Along with surface simplijication or decimation methods, these approaches, which change the surj5ace topology while approximating the geometry, can be regarded as lossy compression schemes. Finaly, I will describe the status of standardization efforts and open problems.","PeriodicalId":387699,"journal":{"name":"Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129756202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8