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Plant Design Review Based on AnyCAD

摘要: Abstract. AVEVA Review is used to 3D model visualization for plant or ship design, construction and operation. Taking data from a range of 3D design systems, AVEVA Review delivers a virtual reality view of a plant or ship which users from all disciplines can freely navigate to view areas of interest, communicate ideas or undertake reviews. Use AVEVA .Net can extract model from DESIGN database, and use AnyCAD .Net can visualize the model. This paper mainly focus on the usage of AnyCAD .Net, and a 閱讀全文

posted @ 2014-04-17 20:56 eryar 閱讀(4493) | 評(píng)論 (0) | 編輯收藏

Conversion Operators in OpenCascade

摘要: Abstract. C++ lets us redefine the meaning of the operators when applied to objects. It also lets us define conversion operations for class types. Class-type conversions are used like the built-in conversions to implicitly convert an object of one type to another type when needed. A conversion operator provides a way for you to define how an object can be converted automatically to a different type. The paper gives some conversion operators examples in OpenCascade.

Key words. OpenCascad 閱讀全文

posted @ 2014-04-12 19:21 eryar 閱讀(2423) | 評(píng)論 (0) | 編輯收藏

AVEVA Model Data Exchange Exports Structure Models

摘要: Use Model Data Exchange Addin to export structure models for PDMS.
配置方法見(jiàn)：http://www.shnenglu.com/eryar/archive/2013/05/01/199875.html
更新記錄：http://www.shnenglu.com/eryar/archive/2013/09/11/203182.html 閱讀全文

posted @ 2014-04-10 20:30 eryar 閱讀(1962) | 評(píng)論 (0) | 編輯收藏

Mesh Algorithm in OpenCascade

摘要: Abstract. Rendering a generic surface is a two steps process: first, computing the points that will form the mesh of the surface and then, send this mesh to 3D API. Use the Triangle to triangulate the parametric space and then lifting map to the model 3D space. This is the main method to visualize the generic shaded surface. This paper show the OpenCascade triangulation of the parametric space and the map result: mesh in 3D model space. Use the method can visualize a generic surface.

K 閱讀全文

posted @ 2014-04-06 14:56 eryar 閱讀(7772) | 評(píng)論 (6) | 編輯收藏

2014-Blue Horse in PDMS

摘要: 2014-Blue Horse in PDMS 閱讀全文

posted @ 2014-03-31 22:55 eryar 閱讀(1321) | 評(píng)論 (0) | 編輯收藏

Triangle - Delaunay Triangulator

摘要: Abstract. Triangle is a 2D quality mesh generator and Delaunay triangulator. Triangle was created as part of the Quake project in the school of Computer Science at Carnegie Mellon University by Jonathan R. Shewchuk. Triangle is a small C program and its Delaunay refinement algorithm for quality mesh generation is a hybrid one. It includes divide-and-conquer and incremental insertion algorithms and sweepline Delaunay triangulation algorithm. This paper is focused on the usage of the Triangle and 閱讀全文

posted @ 2014-03-29 16:43 eryar 閱讀(13795) | 評(píng)論 (17) | 編輯收藏

OpenCascade MeshVS Usage

摘要: Abstract. MeshVS means Mesh Visualization Service. It can be used to representation mesh in different style, such as colored stress patterns mesh, mesh with text and mesh like vector(with arrow). So MeshVS usually used for CAE programming. This paper focus on the MeshVS usage.

Key words. OpenCascade, Mesh, MeshVS, Colored stress Patterns 閱讀全文

posted @ 2014-03-27 18:52 eryar 閱讀(5234) | 評(píng)論 (8) | 編輯收藏

OpenCascade Primitives BRep-Cone

摘要: Abstract. BRep is short for Boundary Representation. Boundary Representation gives a complete description of an object by associating topological and geometric information for solid modeling. In this case, objects are described by their boundaries. There are two types of information in BRep: Topological information and Geometric information. This paper is concerned with the Cone BRep in OpenCascade, and also show how to use Tcl script to dump cone BRep info.

Key words. OpenCascade, BRep 閱讀全文

posted @ 2014-03-25 18:01 eryar 閱讀(1894) | 評(píng)論 (0) | 編輯收藏

OpenCascade Primitives BRep-Torus

摘要: Abstract. BRep is short for Boundary Representation. Boundary Representation gives a complete description of an object by associating topological and geometric information for solid modeling. In this case, objects are described by their boundaries. There are two types of information in BRep: Topological information and Geometric information. This paper is concerned with the Torus BRep in OpenCascade, and also show how to use Tcl script to dump torus BRep info.

Key words. OpenCascade, BR 閱讀全文

posted @ 2014-03-23 17:07 eryar 閱讀(1762) | 評(píng)論 (0) | 編輯收藏

OpenCascade Primitives BRep-Cylinder

摘要: Abstract. BRep is short for Boundary Representation. Boundary Representation gives a complete description of an object by associating topological and geometric information for solid modeling. In this case, objects are described by their boundaries. There are two types of information in BRep: Topological information and Geometric information. This paper is concerned with the Cylinder BRep in OpenCascade, and also show how to use Tcl script to dump cylinder BRep info.

Key words. OpenCasca 閱讀全文

posted @ 2014-03-23 11:09 eryar 閱讀(2173) | 評(píng)論 (0) | 編輯收藏

OpenCascade Primitives BRep - Sphere

摘要: Abstract. BRep is short for Boundary Representation. Boundary Representation gives a complete description of an object by associating topological and geometric information for solid modeling. In this case, objects are described by their boundaries. There are two types of information in BRep: Topological information and Geometric information. This paper is concerned with the sphere BRep in OpenCascade, and also show how to use Tcl script to dump sphere BRep info.

Key words. OpenCascade, 閱讀全文

posted @ 2014-03-22 12:24 eryar 閱讀(2443) | 評(píng)論 (0) | 編輯收藏

OpenCascade Primitives BRep - Box

摘要: Abstract. BRep is short for Boundary Representation. Boundary Representation gives a complete description of an object by associating topological and geometric information for solid modeling. In this case, objects are described by their boundaries. There are two types of information in BRep: Topological information and Geometric information. This paper is concerned with the Box BRep in OpenCascade, and also show how to use Tcl script to dump box BRep info.

Key words. OpenCascade, BRep, 閱讀全文

posted @ 2014-03-19 19:00 eryar 閱讀(3596) | 評(píng)論 (0) | 編輯收藏

PCurve - Curve on Surface

摘要: Abstract. 本文通過(guò)給出曲面上曲線PCurve的定義來(lái)對(duì)OpenCascade中的Curve On Surface進(jìn)行理解，并介紹了OpenCascade對(duì)應(yīng)的類(lèi)BRep_CurveOnSurface實(shí)現(xiàn)。通過(guò)Tcl腳本輸出的球的拓樸信息，分析PCurve的實(shí)際應(yīng)用。

Key words. OpenCascade, ACIS, PCurve, Curve on Surface, Parametric Surface 閱讀全文

posted @ 2014-03-15 12:07 eryar 閱讀(4479) | 評(píng)論 (0) | 編輯收藏

Parametric Curves and Surfaces

摘要: Abstract. This paper is concerned with parametric curves and surfaces definitions, such as singular point and regular point and their application in OpenCascade. The two most common methods of representing curves and surfaces in geometric modeling are implicit equations and parametric functions. Successful geometric modeling is done using both techniques. When you use parametric functions to represent curves and surfaces, you need to pay attention for the characteristic of it, such as singularit 閱讀全文

posted @ 2014-03-10 18:43 eryar 閱讀(3608) | 評(píng)論 (0) | 編輯收藏

Surface Normal Averaging

摘要: 　　摘要Abstract：正確設(shè)置網(wǎng)格面上點(diǎn)的法向，對(duì)幾何體在光照等情況下顯示得更真實(shí)，這樣就可以減少頂點(diǎn)數(shù)量，提高渲染速度。本文通過(guò)將OpenCascade中的形狀離散成網(wǎng)格數(shù)據(jù)后在OpenSceneGraph中顯示，及使用OSG的快速法向osgUtil::SmoothingVisitor優(yōu)化與使用OpenCascade來(lái)計(jì)算正確的法向的結(jié)果的對(duì)比，說(shuō)明面法向量的重要性。
　　
關(guān)鍵字Key Words：OpenCascade, OpenSceneGraph, Normal Averaging, Triangulation Mesh 閱讀全文

posted @ 2014-02-27 21:47 eryar 閱讀(4478) | 評(píng)論 (0) | 編輯收藏

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