eryar

PipeCAD - Plant Piping Design Software.
PlantAssistant - Translate AVEVA RVM/SP3D VUE to glTF, STEP, etc.

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10 2014 檔案

踮腳張望的時光

摘要: 有一天你將破蛹而出，成長得比人們期待的還要美麗。
但這個過程會很痛，會很辛苦，有時候還會覺得灰心。
面對著洶涌而來的現實，覺得自己渺小無力。
但這，也是生命的一部分。做好現在你能做的，然后，一切都會好的。
我們都將孤獨地長大，不要害怕。

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posted @ 2014-10-27 19:48 eryar 閱讀(2008) | 評論 (0) 編輯 |

OpenCASCADE Root-Finding Algorithm

摘要: Abstract. A root-finding algorithm is a numerical method, or algorithm, for finding a value x such that f(x)=0, for a given function f. Such an x is called a root of the function f. In OpenCASCADE math package, implemente Newton-Raphson method to find the root for a function. The algorithm can be used for finding the extrema value for curve or surface, .i.e Point Inversion, find the parameter for a point on the curve or surface. The paper focus on the usage of OpenCASCADE method and its applicat 閱讀全文

posted @ 2014-10-21 19:06 eryar 閱讀(3458) | 評論 (2) 編輯 |

OpenCASCADE DataExchange DWG

摘要: Abstract. DWG is a file format created in the 70’s for the emerging CAD applications. Currently it is the native file format of AutoCAD, a proprietary CAD program developed by Autodesk. Libredwg is a free C library to read and write DWG files. This program is part of GNU project, released under the aegis of GNU. The paper focus on the usage of Libredwg, and use the Libredwg to read a DWG file and output the entities of the DWG to Tcl script for OpenCASCADE Draw Test Harness visualization.
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posted @ 2014-10-15 23:02 eryar 閱讀(6484) | 評論 (0) 編輯 |

OpenCASCADE Conic to BSpline Curves-Circle

摘要: Abstract. The conic sections and circles play a fundamental role in CAD/CAM applications. Undoubtedly one of the greatest advantages of NURBS is their capability of precisely representing conic sections and circles, as well as free-form curves and surfaces. We assume a knowledge of conics and circles, the purpose of this paper is to study them in the framework of their representation as NURBS curves.

Key Words. OpenCASCADE, Conic Curves, Circle, Convert, BSpline Curve 閱讀全文

posted @ 2014-10-13 22:03 eryar 閱讀(2702) | 評論 (0) 編輯 |

OpenCASCADE Conic to BSpline Curves-Hyperbola

摘要: Abstract. Rational Bezier Curve can represent conic curves such as circle, ellipse, hyperbola, .etc. But how to convert a conic curve to BSpline curve is still question, i.e. Represent a conic curve in BSpline form. The key point of Hyperbola conversion is to calculate the 2nd pole and its weight factor. The paper focus on the hyperbola convert to the BSpline curves.

Key Words. OpenCASCADE, Convert, Hyperbola, BSplineCurve, Conic Curve 閱讀全文

posted @ 2014-10-07 15:34 eryar 閱讀(1974) | 評論 (0) 編輯 |

OpenCASCADE Conic to BSpline Curves-Parabola

摘要: Abstract. Rational Bezier Curve can represent conic curves such as circle, ellipse, hyperbola, .etc. But how to convert a conic curve to BSpline curve is still question, i.e. Represent a conic curve in BSpline form. Parabola curve is the most simple conic curve, that the parabola does not require rational functions. Let’s begin from the simplest one...

Key Words. OpenCASCADE, Convert, Parabola, BSplineCurve, Conic Curve 閱讀全文

posted @ 2014-10-02 23:21 eryar 閱讀(2862) | 評論 (0) 編輯 |

Building OpenCASCADE on Debian

摘要: Abstract. When you are familiar with OpenCASCADE on Windows, you should try it on Linux operating system, because of Debian is also open source like OpenCASCADE. The paper is focus on how to building the OpenCASCADE on Debian.

Key Words. OpenCASCADE, Linux, Debian, Building 閱讀全文

posted @ 2014-10-01 15:27 eryar 閱讀(2117) | 評論 (0) 編輯 |

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