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posts - 419, comments - 576, trackbacks - 0, articles - 0

12 2013 档案

     摘要:   摘要Abstract:本文主要对工厂和海工设计软件AVEVA的交互方式进行详细介绍,对OpenSceneGraph中的人机交互工具拖拽器进行说明,并在其中实现了模型直接交互操作。对交互建模?#34892;?#36259;的读者可结合其源代码,对其实现细节进行分析。
  
  关键字Key Words:AVEVA, Model Editor, OpenSceneGraph, Dragger  阅读全文

posted @ 2013-12-30 13:09 eryar 阅读(2538) | 评论 (0)  编辑 |

     摘要:   摘要Abstract:对DXF文本格式进行详细介绍,并介绍了如何使用开源库dxflib对DXF文件进行读写操作,并将DXF文件中图形导入到OpenCascade。

  关键字Key Words:DXF、Open Cascade、Data Exchange, dxflib  阅读全文

posted @ 2013-12-22 18:30 eryar 阅读(5826) | 评论 (2)  编辑 |

     摘要:   摘要Abstract?#21644;?#36807;对OpenCascade中的BRep数据的读写,理解边界表示法的概念及实现。理解了拓?#26377;?#29366;的数据结构,?#25237;訫odelingData模块有了清晰认识,方便OpenCascade其他模块如ModelingAlgorithms和Visiualization模块的理解。
  
  关键字Key Words:OpenCascade, BRep, Topology, BRep Format  阅读全文

posted @ 2013-12-21 23:07 eryar 阅读(2510) | 评论 (0)  编辑 |

     摘要:   摘要Abstract?#21512;?#22312;的显示器大多数是光栅显示器,即可以看做一个像素的矩阵。在光栅显示器上显示的任何图形,?#23548;?#19978;都是一些具有一种或多种颜色的集合。数学上精确表示的图形在显示器中只能用?#24179;?#30340;方式显示出来。本文主要对OpenCascade的BRep文件中用来显示曲线和曲面的离散数据结构进行说明。

  关键字:OpenCascade, BRep, Polygon, Triangulation, Subdivision Curves,  阅读全文

posted @ 2013-12-14 18:40 eryar 阅读(1845) | 评论 (2)  编辑 |

     摘要:   摘要Abstract:本文通过程序实例,将OpenCascade中的拓朴数据(边、面)离散化后在OpenSceneGraph中进行显示。有了这些离散数据,就可以不用OpenCascade的显示模块了,可以使用其他显示引擎对形状进行显示。即若要线框模式显示形状时,就绘?#35780;?#25955;形状拓朴边后得到的多段线;若要实体渲染模式显示形状时,就绘?#35780;?#25955;形状拓?#29992;?#24471;到的三角网格。理解这些概念也有助于理解显示模块的实现,及拓朴数据中包含的几何数据的意义。

  关键字 Key Words:OpenCascade, polygon curve, triangulation,discrete edge, discrete face, OpenSceneGraph, OSG  阅读全文

posted @ 2013-12-04 21:45 eryar 阅读(3503) | 评论 (6)  编辑 |

     摘要:   摘要Abstract:几何曲面是参数表示的曲面 ,在边界表示中其数据存在于BRep_TFace中,BRep_TFace中不仅包括了几何曲线,还包含用于显示的离散几何信息,如三角剖分数据。本文主要对OpenCascade的BRep表示中几何曲面进行说明,将在后面分析Topology部分的读写程序时来说明包含几何数据的三种拓朴结构中分别包括哪些几何信息。

  关键字Key Words:OpenCascade BRep, Geometry Surface, Topology  阅读全文

posted @ 2013-12-02 23:03 eryar 阅读(2491) | 评论 (5)  编辑 |

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快三3稳赚技巧钱绝招
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