Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001最新文献_第5页

Efficient rendering of optical effects within water using graphics hardware 使用图形硬件在水中高效渲染光学效果

Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001 Pub Date : 2001-10-16 DOI: 10.1109/PCCGA.2001.962894

Kei Iwasaki, T. Nishita, Y. Dobashi

引用次数: 19

Haptic sculpting of volumetric implicit functions 体积隐式功能的触觉雕刻

Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001 Pub Date : 2001-10-16 DOI: 10.1109/PCCGA.2001.962881

Jing Hua, Hong Qin

{"title":"Haptic sculpting of volumetric implicit functions","authors":"Jing Hua, Hong Qin","doi":"10.1109/PCCGA.2001.962881","DOIUrl":"https://doi.org/10.1109/PCCGA.2001.962881","url":null,"abstract":"Implicit functions characterized by the zero-set of polynomial-based algebraic equations and other commonly-used analytic equations are extremely powerful in graphics, geometric design, and visualization. But the potential of implicit functions is yet to be fully realized due to the lack of flexible and interactive design techniques. The paper presents a haptic sculpting system founded upon scalar trivariate B-spline functions. All the solids sculpted in our environment are semi-algebraic sets of volumetric implicit functions. We develop a large variety of sculpting toolkits equipped with an intuitive haptic interface to facilitate the direct manipulation of implicit functions in real-time. To facilitate multiresolution editing and different levels of details, we employ three techniques: hierarchical B-splines, CSG-based functional composition, and knot insertion. Our experiments demonstrate that our algorithms and haptics-based techniques can greatly overcome the modeling difficulties associated with implicit functions. The novel modeling techniques and their haptics-based design principle are extensible to the design of arbitrary implicit functions.","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":"130260391","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: 44

Simulation of peeling using 3D-surface cellular automata 用三维表面元胞自动机模拟脱皮

Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001 Pub Date : 2001-10-16 DOI: 10.1109/PCCGA.2001.962890

S. Gobron, Norishige Chiba

引用次数: 21

Topology recognition of 3D closed freeform objects based on topological graphs 基于拓扑图的三维封闭自由物体拓扑识别

Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001 Pub Date : 2001-05-01 DOI: 10.1109/PCCGA.2001.962860

D. Steiner, A. Fischer

{"title":"Topology recognition of 3D closed freeform objects based on topological graphs","authors":"D. Steiner, A. Fischer","doi":"10.1109/PCCGA.2001.962860","DOIUrl":"https://doi.org/10.1109/PCCGA.2001.962860","url":null,"abstract":"Reverse engineering (RE) deals with an enormous number of irregular and scattered digitized points that require intensive processing in order to reconstruct the surfaces of an object. Surface reconstruction of freeform objects is based on geometrical and topological criteria. Current fitting methods reconstruct an object using a bottom-up approach, from points to a dense mesh, and finally into smoothed connected freeform sub-surfaces. This type of reconstruction, however, can cause topological problems that lead to undesired surface fitting results. Such problems are particularly common with concave shapes. To avoid problems of this type, the paper proposes a new method that automatically detects the topological structure of an object as a base for surface fitting. The topological reconstruction method described in the paper is based on two stages: (1) creating 3D non-self-intersecting iso-curves from a 3D triangular mesh and (2) extracting a topological graph. The feasibility of the proposed topological reconstruction method is demonstrated on several examples using freeform objects with complex topologies.","PeriodicalId":387699,"journal":{"name":"Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129838272","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: 16