eryar

PipeCAD - Plant Piping Design Software.
RvmTranslator - Translate AVEVA RVM to OBJ, glTF, etc.
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10 2014 档案

踮脚张望的时光

     摘要: 有一天你将破蛹而出，成长得比人们期待的还要美丽。
但这个过程会很痛，会很辛苦，有时候还会觉得灰心。
面对着汹涌而来的现实，觉得自己渺小无力。
但这，也是生命的一部分。做好现在你能做的，然后，一切都会好的。
我们都将孤独地长大，不要害怕。

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posted @ 2014-10-27 19:48 eryar 阅读(1979) | 评论 (0)  编辑 |

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  阅读全文

posted @ 2014-10-21 19:06 eryar 阅读(3353) | 评论 (2)  编辑 |

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 阅读(6286) | 评论 (0)  编辑 |

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  阅读全文

posted @ 2014-10-13 22:03 eryar 阅读(2589) | 评论 (0)  编辑 |

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  阅读全文

posted @ 2014-10-07 15:34 eryar 阅读(1891) | 评论 (0)  编辑 |

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  阅读全文

posted @ 2014-10-02 23:21 eryar 阅读(2767) | 评论 (0)  编辑 |

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  阅读全文

posted @ 2014-10-01 15:27 eryar 阅读(2027) | 评论 (0)  编辑 |