Proceedings of the 19th annual conference on Computer graphics and interactive techniques最新文献_第5页

Three dimensional apparel CAD system 三维服装CAD系统

Proceedings of the 19th annual conference on Computer graphics and interactive techniques Pub Date : 1992-07-01 DOI: 10.1145/133994.134019

H. Okabe, H. Imaoka, Takako Tomiha, H. Niwaya

{"title":"Three dimensional apparel CAD system","authors":"H. Okabe, H. Imaoka, Takako Tomiha, H. Niwaya","doi":"10.1145/133994.134019","DOIUrl":"https://doi.org/10.1145/133994.134019","url":null,"abstract":"We aredeveloping a three dimensional ( denoted 3D, hereafter) CAD system for garments to help the process of pattern making. This is a process to create a 3D form of a garment by designing a two dimensional ( 2D, hereafter ) paper pattern that realizes the 3D form The core of the system is a simulator that estimates the 3D form of a garment put on a body from its paper pattern ( 2D~3D process ) and a developing program to obtain the 2D pattern that minimizes the energy required to deform it to the given 3D shape ( 3D ~2D process ). In both processes, the specific snisotropy of the mechanical properties of cloths is ecmsidered. In the 2D +3D process, the contact problem with body and geometrical nonlinearity are also taken into account. The preprocessor for the 2D+3D simulator is quite unique in that it converts an arbitrmy 2D paper pattern into a 3D surface, ecmaidering the topological operatiom ‘sewing’. Both the 2D~ 3D process and the 3D +2D process are formulated as nonlinear energy-minimum problems, and they are solved by our original method in about 10 minutes with our workstations. Once the 3D form is obtain~ the color pattern of a given cloth is mapped and displayed. As a consequence of the mechanical calculation, the distributions of the distortion and stress of the cloth are also visualized. Such information may contribute to the design of garments with consideration of physical attributes as well as visual beauty.","PeriodicalId":196837,"journal":{"name":"Proceedings of the 19th annual conference on Computer graphics and interactive techniques","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127572950","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: 122

A fast and accurate light reflection model 快速准确的光反射模型

Proceedings of the 19th annual conference on Computer graphics and interactive techniques Pub Date : 1992-07-01 DOI: 10.1145/133994.134073

Xiao D. He, Patrick O. Heynen, R. Phillips, K. Torrance, D. Salesin, D. Greenberg

引用次数: 47

Fast shadows and lighting effects using texture mapping 快速阴影和照明效果使用纹理映射

Proceedings of the 19th annual conference on Computer graphics and interactive techniques Pub Date : 1992-07-01 DOI: 10.1145/133994.134071

Mark E. Segal, Carl Korobkin, Rolf van Widenfelt, Jim Foran, P. Haeberli

引用次数: 513

Surface reconstruction from unorganized points 从无组织点重建曲面

Proceedings of the 19th annual conference on Computer graphics and interactive techniques Pub Date : 1992-07-01 DOI: 10.1145/133994.134011

Hugues Hoppe, T. DeRose, T. Duchamp, J. McDonald, W. Stuetzle

引用次数: 3161

Interval analysis for computer graphics 计算机图形学区间分析

Proceedings of the 19th annual conference on Computer graphics and interactive techniques Pub Date : 1992-07-01 DOI: 10.1145/133994.134024

John M. Snyder

{"title":"Interval analysis for computer graphics","authors":"John M. Snyder","doi":"10.1145/133994.134024","DOIUrl":"https://doi.org/10.1145/133994.134024","url":null,"abstract":"This paper discusses how interval analysis can be used to solve a wide variety of problems in computer graphics. These problems include ray tracing, interference detection, polygonal decomposition of parametric surfaces, and CSG on solids bounded by parametric surfaces. Only two basic algorithms are required: SOLVE, which computes solutions to a system of constraints, and MINIMIZE, which computes the global minimum of a function, subject to a system of constraints. We present algorithms for SOLVE and MINIMIZE using interval analysis as the conceptual framework. Crucial to the technique is the creation of “inclusion functions” for each constraint and function to be minimized. Inclusion functions compute a bound on the range of a function, given a similar bound on its domain, allowing a branch and bound approach to constraint solution and constrained minimization. Inclusion functions also allow the MINIMIZE algorithm to compute global rather than local minima, unlike many other numerical algorithms. Some very recent theoretical results are presented regarding existence and uniqueness of roots of nonlinear equations, and global parameterizability of implicitly described manifolds. To illustrate the power of the approach, the basic algorithms are further developed into a new algorithm for the approximation of implicit curves. CR Categories: I.3.5 [Computer Graphics]: Computational Geometry and Object Modeling; G.4 [Mathematical Software]: Reliability and Robustness Additional","PeriodicalId":196837,"journal":{"name":"Proceedings of the 19th annual conference on Computer graphics and interactive techniques","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115087224","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: 352

Proceedings of the 19th annual conference on Computer graphics and interactive techniques 第19届计算机图形学与交互技术年会论文集

Proceedings of the 19th annual conference on Computer graphics and interactive techniques Pub Date : 1900-01-01 DOI: 10.1145/133994

引用次数: 53