Proceedings of the 13th annual conference on Computer graphics and interactive techniques最新文献_第3页

Ray tracing complex scenes 光线追踪复杂场景

Proceedings of the 13th annual conference on Computer graphics and interactive techniques Pub Date : 1986-08-31 DOI: 10.1145/15922.15916

Timothy L. Kay, J. Kajiya

引用次数: 573

A simple model of ocean waves 一个简单的海浪模型

Proceedings of the 13th annual conference on Computer graphics and interactive techniques Pub Date : 1986-08-31 DOI: 10.1145/15922.15894

A. Fournier, W. Reeves

{"title":"A simple model of ocean waves","authors":"A. Fournier, W. Reeves","doi":"10.1145/15922.15894","DOIUrl":"https://doi.org/10.1145/15922.15894","url":null,"abstract":"We present a simple model for the surface of the ocean, suitable for the modeling and rendering of most common waves where the disturbing force is from the wind and the restoring force from gravity.It is based on the Gerstner, or Rankine, model where particles of water describe circular or elliptical stationary orbits. The model can easily produce realistic waves shapes which are varied according to the parameters of the orbits. The surface of the ocean floor affects the refraction and the breaking of waves on the shore. The model can also determine the position, direction, and speed of breakers.The ocean surface is modeled as a parametric surface, permitting the use of traditional rendering methods, including ray-tracing and adaptive subdivision. Animation is easy, since time is built into the model. The foam generated by the breakers is modeled by particle systems whose direction, speed and life expectancy is given by the surface model.To give designers control over the shape of the ocean, the model of the overall surface includes multiple trains of waves, each with its own set of parameters and optional stochastic elements. The overall \"randomness\" and \"short-crestedness\" of the ocean is achieved by a combination of small variations within a train and large variations between trains.Rendered examples of oceans waves generated by the model are given and a 10 second animation is described.","PeriodicalId":20524,"journal":{"name":"Proceedings of the 13th annual conference on Computer graphics and interactive techniques","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1986-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84972508","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: 470

Ray tracing parametric surface patches utilizing numerical techniques and ray coherence 利用数值技术和射线相干性的射线追踪参数表面贴片

Proceedings of the 13th annual conference on Computer graphics and interactive techniques Pub Date : 1986-08-31 DOI: 10.1145/15922.15917

K. Joy, M. Bhetanabhotla

引用次数: 65

A montage method: the overlaying of the computer generated images onto a background photograph 蒙太奇法:将计算机生成的图像叠加到背景照片上

Proceedings of the 13th annual conference on Computer graphics and interactive techniques Pub Date : 1986-08-31 DOI: 10.1145/15922.15909

E. Nakamae, K. Harada, T. Ishizaki, T. Nishita

{"title":"A montage method: the overlaying of the computer generated images onto a background photograph","authors":"E. Nakamae, K. Harada, T. Ishizaki, T. Nishita","doi":"10.1145/15922.15909","DOIUrl":"https://doi.org/10.1145/15922.15909","url":null,"abstract":"A system of computer programs has been established to generate high quality montage image of considerable usefulness in architectural simulation which combine computer-generated images and photographed background pictures.Traditionally, there are two methods of creating architectural montages: (1) an artist paints new buildings onto a background scene usually generated photographically, and (2) a three-dimensional scale model is created to simulate the whole landscape, and this model is then photographed. The montage method described here combines aspects of both traditional montage methods with significant improvement in accuracy and reduction of time and cost of preparation. Specifically, a digitized photograph is used as a background scene onto which is superimposed a 3D computer-generated image of a new building. The outstanding points of the new method are:(i) The shading and shadows of each computer generated image are calculated with higher accuracy, (ii) the fog effect is taken into account, and (iii) a new anti-aliasing technique improves the quality of the final montage image.","PeriodicalId":20524,"journal":{"name":"Proceedings of the 13th annual conference on Computer graphics and interactive techniques","volume":"109 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1986-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76522932","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: 118

Image rendering by adaptive refinement 自适应细化的图像渲染

Proceedings of the 13th annual conference on Computer graphics and interactive techniques Pub Date : 1986-08-31 DOI: 10.1145/15922.15889

L. Bergman, H. Fuchs, E. Grant, S. Spach

{"title":"Image rendering by adaptive refinement","authors":"L. Bergman, H. Fuchs, E. Grant, S. Spach","doi":"10.1145/15922.15889","DOIUrl":"https://doi.org/10.1145/15922.15889","url":null,"abstract":"This paper describes techniques for improving the performance of image rendering on personal workstations by using CPU cycles going idle while the user is examining a static image on the screen. In that spirit, we believe that a renderer's work is never done. Our goal is to convey the most information to the user as early as possible, with image quality constantly improving with time. We do this by first generating a crude image rapidly and then adaptively refining it where necessary as long as the user does not change viewing parameters. The renderer operates in a succession of phases, first displaying only vertices of polygons, next polygon edges, then flat shading polygons, then shadowing polygons, then Gouraud shading polygons, then Phong shading polygons, and finally anti-aliasing. Performance is enhanced by each phase using results from previous phases and trimming the amount of data needed by the next phase. In this way, only a fraction of the pixels in an image may be Phong shaded while the rest may be Gouraud or flat shaded. Similarly anti-aliasing is performed only on pixels around which there is significant color change. The system features fast response to user intervention, encourages user intervention at any moment, and makes useful the idle cycles in a personal computer.","PeriodicalId":20524,"journal":{"name":"Proceedings of the 13th annual conference on Computer graphics and interactive techniques","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1986-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86115267","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: 149

Snap-dragging Snap-dragging

Proceedings of the 13th annual conference on Computer graphics and interactive techniques Pub Date : 1986-08-31 DOI: 10.1145/15922.15912

E. Bier, M. Stone

引用次数: 206

The rendering equation 渲染方程

Proceedings of the 13th annual conference on Computer graphics and interactive techniques Pub Date : 1986-08-31 DOI: 10.1145/15922.15902

J. Kajiya

引用次数: 2712

Adaptive precision in texture mapping 纹理映射的自适应精度

Proceedings of the 13th annual conference on Computer graphics and interactive techniques Pub Date : 1986-08-31 DOI: 10.1145/15922.15919

A. Glassner

引用次数: 55

An object-oriented user interface management system 一个面向对象的用户界面管理系统

Proceedings of the 13th annual conference on Computer graphics and interactive techniques Pub Date : 1986-08-31 DOI: 10.1145/15922.15915

J. Sibert, W. D. Hurley, T. Bleser

引用次数: 110

Real time design and animation of fractal plants and trees 分形植物和树木的实时设计和动画

Proceedings of the 13th annual conference on Computer graphics and interactive techniques Pub Date : 1986-08-31 DOI: 10.1145/15922.15892

P. Oppenheimer

{"title":"Real time design and animation of fractal plants and trees","authors":"P. Oppenheimer","doi":"10.1145/15922.15892","DOIUrl":"https://doi.org/10.1145/15922.15892","url":null,"abstract":"The goal of science is to understand why things are the way they are. By emulating the logic of nature, computer simulation programs capture the essence of natural objects, thereby serving as a tool of science. When these programs express this essence visually, they serve as an instrument of art as well.This paper presents a fractal computer model of branching objects. This program generates pictures of simple orderly plants, complex gnarled trees, leaves, vein systems, as well as inorganic structures such as river deltas, snow flakes, etc. The geometry and topology of the model are controlled by numerical parameters which are analogous to the organism's DNA. By manipulating the genetic parameters, one can modify the geometry of the object in real time, using tree based graphics hardware. The random effects of the environment are taken into account, to produce greater diversity and realism. Increasing the number of significant parameters yields more complex and evolved species.The program provides a study in the structure of branching objects that is both scientific and artistic. The results suggest that organisms and computers deal with complexity in similar ways.","PeriodicalId":20524,"journal":{"name":"Proceedings of the 13th annual conference on Computer graphics and interactive techniques","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1986-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79557508","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: 308