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OpenCASCADE Gauss Integration

摘要: Abstract. Numerical integration is the approximate computation of an integral using numerical techniques. The numerical computation of an integral is sometimes called quadrature. The most straightforward numerical integration technique uses the Newton-Cotes formulas(also called quadrature formulas), which approximate a function tabulated sequence of regularly spaced intervals by various degree polynomials. If the functions are known analytically instead of being tabulated at equally spaced inter 閱讀全文

posted @ 2014-09-11 21:52 eryar 閱讀(2797) | 評(píng)論 (0) | 編輯收藏

OpenCASCADE Documentation System

摘要: Abstract. Doxygen is the de facto standard tool for generating documentation from annotated C++ sources, but it also supports other popular programming languages. You can also use doxygen for creating normal documentation, as OpenCASCADE did for its references and user’s guide documents.

Key Words. OpenCASCADE, Doxygen, Documentation System 閱讀全文

posted @ 2014-09-10 22:30 eryar 閱讀(3601) | 評(píng)論 (0) | 編輯收藏

IsoAlgo GUI Usage

摘要: Abstract. The GUI of IsoAlgo is made by Tcl/Tk. The usage is easy and simple, if you are familiar with Tcl/Tk, you can customize it by yourself. The paper focus on the usage for IsoAlgo GUI and the method to customize the IsoAlgo GUI.

Key Words. IsoAlgo, isogen, GUI, Tcl/Tk, Customization, PCF, DXF 閱讀全文

posted @ 2014-09-03 20:43 eryar 閱讀(2335) | 評(píng)論 (0) | 編輯收藏

IsoAlgo Split Drawing Info

摘要: Abstract. When the isometric drawing is splited by split point, it should mark the continue drawing info
on the split point. You can also config the “CONT. ON” by the config file.
Key words. IsoAlgo, Split Drawing,

For more information about IsoAlgo, please visit: http://code.google.com/p/isoalgo/
Any feedback is welcome, please send email to the author: IsoAlgo@gmail.com.
IsoAlgo User Guide: http://www.shnenglu.com/eryar/archive/2014/04/27/206735.html
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posted @ 2014-08-31 11:50 eryar 閱讀(1427) | 評(píng)論 (1) | 編輯收藏

Add Page Number for Foran Pipe Spool Drawing

摘要: Abstract. Add page number for Foran pipe spool drawing generated by ISOM. The ISOM of Foran is used for spool drawing generation, but there is no number on the drawing, so use AutoLISP to write a small plugin to add page number automatically.

Key Words. Foran, ISOM, Pipe Spool Drawing, AutoLISP, OpenCASCADE
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posted @ 2014-08-29 22:05 eryar 閱讀(1687) | 評(píng)論 (0) | 編輯收藏

OpenCASCADE Curve Length Calculation

摘要: Abstract. The natural parametric equations of a curve are parametric equations that represent the curve in terms of a coordinate-independent parameter, generally arc length s, instead of an arbitray variable like t or u. According to the natural equations, the curve length is the integration of the curve parametric equation’s derivation. So the core algorithm for curve length calculation is the numerical integration method. OpenCASCADE use Gauss-Legendre to calculate the integration for single v 閱讀全文

posted @ 2014-08-25 21:31 eryar 閱讀(3900) | 評(píng)論 (2) | 編輯收藏

IsoAlgo Split Point Issues

摘要: Abstract. The impossibility to define the splitting point makes it impossible to generate
the readable isometrics drawing in some cases. If the drawing is so crowded that can not
read it clearly, it should add the split point to the drawing.

Key Words. IsoAlgo, Isogen, Split Point 閱讀全文

posted @ 2014-08-21 22:27 eryar 閱讀(1969) | 評(píng)論 (2) | 編輯收藏

OpenCascade Chinese Text Rendering

摘要: Abstract. OpenCascade uses advanced text rendering powered by FTGL library. The FreeType provides vector text rendering, as a result the text can be rotated and zoomed without quality loss. FreeType also support unicode charset. The paper focus on the Chinese Text rendering.

Key Words. OpenCascade, FreeType, Chinese Text, 中文漢字, Unicode 閱讀全文

posted @ 2014-08-17 14:52 eryar 閱讀(5199) | 評(píng)論 (0) | 編輯收藏

OpenCascade Draw Test Harness

摘要: Abstract. Draw is a command interpreter based on Tcl/Tk and a graphical system used to test and demonstrate OpenCascade modeling libraries. It provides a flexible and easy to use means of testing and demonstrating the OCCT modeling libraries. By a given command of Tcl, you can find the implentation code for that command by OpenCascade, the code could be as a demo to use of OCC modeling libraries. So this is the most effectively way of use OpenCascade.

Key words. OpenCascade, Tcl/Tk, Tes 閱讀全文

posted @ 2014-07-30 20:00 eryar 閱讀(5464) | 評(píng)論 (0) | 編輯收藏

Visualize Surface by Delaunay Triangulator

摘要: Abstract. Delaunay Triangulation is the core algorithm for mesh generation. By Delaunay Triangulator you can make a general method to visualize geometry surfaces, so does OpenCascade. The paper focus on the geometry surfaces visualization, include the surfaces with holes.

Key words. OpenCascade, Delaunay Triangulator, OpenSceneGraph, Mesh, NURBS 閱讀全文

posted @ 2014-07-27 21:01 eryar 閱讀(5419) | 評(píng)論 (0) | 編輯收藏

Intergraph Stamp

摘要: Intergraph Stamp.

Thanks to superman (WuJun). 閱讀全文

posted @ 2014-07-26 17:36 eryar 閱讀(728) | 評(píng)論 (0) | 編輯收藏

OpenCascade B-Spline Basis Function

摘要: Abstract. B-splines are quite a bit more flexible than Bezier curves. This flexibility comes from the fact that you have much more control over the basis functions. For Bezier curves that each control point had an effect on each point on the curve; likewise the number of control points affected the degree of the curve. For the sake of flexiblity, you would like to be able to arbitrarily set the degree of the curve and to also determine the range of the affect each control point has. B-splines al 閱讀全文

posted @ 2014-07-21 19:18 eryar 閱讀(3490) | 評(píng)論 (0) | 編輯收藏

IsoAlgo Split Point

摘要: Abstract.
The impossibility to define the splitting point makes it impossible to generate
the readable isometrics drawing in some cases. If the drawing is so crowded
that can not read it clearly, it should add the split point to the drawing.

Key words. IsoAlgo, Isogen, Split Point,
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posted @ 2014-07-20 15:11 eryar 閱讀(2003) | 評(píng)論 (4) | 編輯收藏