opencascade draw 学习

2024-08-03

OpenCASCADE入门指南

OpenCASCADE入门指南 eryar@163.com 一.概述荀子说“君子性非异也,善假于物也”.当你会用英语,就可以与世界各国的人交流:当你会用编程语言,就可以与计算机交流:当你会用数学语言,就可以精确的描述世界.当你会用OpenCASCADE这个开发包(SDK),就可以在计算机中创造一个三维世界.大学期间,偶然在图书馆翻到一本发黄的书,讲的是用Turbo C2.0 C语言graphics.h头文件来画图的计算机图形学的书,随即对计算机图形学有了兴趣.后来一直在图书馆里面看计算机图形学

OpenCascade Draw Test Harness

OpenCascade Draw Test Harness eryar@163.com 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 demons

OpenCASCADE Ring Type Spring Modeling

OpenCASCADE Ring Type Spring Modeling eryar@163.com Abstract. The general method to directly create an edge is to give a 3D curve as the support(geometric domain) of the edge. The curve maybe defined as a 2D curve in the parametric space of a surface

OpenNURBS to OpenCASCADE

OpenNURBS to OpenCASCADE eryar@163.com Abstract. The OpenNURBS initiative provides CAD/CAM/CAE and computer graphics software developers the tools to accurately transfer 3D geometry between applications. The OpenNURBS C++ source code is clean and fai

OpenCASCADE Shape Location

OpenCASCADE Shape Location eryar@163.com Abstract. The TopLoc package of OpenCASCADE gives resources to handle 3D local coordinate systems called Locations. A Location is a composition of elementary coordinate systems, each one is called a Datum. The

OpenCASCADE PCurve of Topological Face

OpenCASCADE PCurve of Topological Face eryar@163.com Abstract. OpenCASCADE provides a class BRepBuilderAPI_MakeFace to build topological faces. A face maybe built from a surface, elementary surface from gp package, surface from Geom, from a wire and

OpenCASCADE General Transformation

OpenCASCADE General Transformation eryar@163.com Abstract. OpenCASCADE provides a general transformation class: gp_GTrsf. It can be a transformation from gp, an affinity, or you can define your own transformation giving the matrix of transformation.

OpenCASCADE DataExchange DWG

OpenCASCADE DataExchange DWG eryar@163.com 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

OpenCascade Chinese Text Rendering

OpenCascade Chinese Text Rendering eryar@163.com 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 al

Hello World of OpenCascade

Hello World of OpenCascade eryar@163.com 摘要Abstract:以一个经典的Hello World程序为例开始对开源几何造型内核OpenCascade的学习. 关键字Key Words:OpenCascade.Qt.Hello World 一.引言 Introduction OpenCascade编译成功后,看着大量的代码,无从下手.本文以Hello World程序为例,详细说明使用OpenCascade进行编程需要注意的事项,以便对OpenCascade

Render OpenCascade Geometry Curves in OpenSceneGraph

在OpenSceneGraph中绘制OpenCascade的曲线 Render OpenCascade Geometry Curves in OpenSceneGraph eryar@163.com 摘要Abstract:本文简要说明OpenCascade中几何曲线的数据,并将这些几何曲线在OpenSceneGraph中绘制出来. 关键字KeyWords:OpenCascade.Geometry Curve.OpenSceneGraph.B-Spline.NURBS 一.引言 Introduct

OpenCascade

Hello World of OpenCascade Hello World of OpenCascade eryar@163.com 摘要Abstract:以一个经典的Hello World程序为例开始对开源几何造型内核OpenCascade的学习. 关键字Key Words:OpenCascade.Qt.Hello World 一.引言 Introduction OpenCascade编译成功后,看着大量的代码,无从下手.本文以Hello World程序为例,详细说明使用OpenCasc

OpenCascade Ruled Surface

OpenCascade Ruled Surface eryar@163.com Abstract. A ruled surface is formed by moving a line connecting points of equal relative arc length or equal relative parametric value on two parametric curves from a start point to a terminate point on the cur

OpenCASCADE Trihedron Law

OpenCASCADE Trihedron Law eryar@163.com Abstract. In differential geometry the Frenet-Serret formulas describe the kinematic properties of a particle moving along a continuous, differentiable curve in 3d space, or the geometric properties of the curv

Create New Commands in Tcl

Create New Commands in Tcl eryar@163.com 摘要Abstract:Tcl/Tk脚本可以很容易实现用户自定义的命令,方便的创建图形化的用户界面GUI,所以Tcl和Tk的应用领域几乎覆盖了图形和工程应用的全部范围,包括计算机辅助设计.软件开发.测试.仪器控制.科学可视化及多媒体方面.本文主要详解如何在C程序中使用Tcl来创建自定义的命令,并理解OpenCascade的Draw Test Harness的实现. 关键字Key Words:OpenCascade,

Hello Netgen

Hello Netgen eryar@163.com 摘要Abstract:本文主要介绍如何对下载的Netgen源码进行编译生成Netgen程序和程序开发所需要的库nglib. 关键字Key Words:Netgen, nglib, Mesh Generator, OpenCascade, Triangulation 一.引言 Introduction NETGEN是一个二维/三维自动网格剖分工具,并且遵循LGPL开源协议.即可以作为一个带有用户界面的单独程序使用,也可以作为C++的库文件被其它

arcgis for js学习之Draw类

arcgis for js学习之Draw类 <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title>Draw类的详解</title> <meta charset="utf-8" /> <!-- 绘图功能说

[Android学习笔记]View的draw过程学习

View从创建到显示到屏幕需要经历几个过程: measure -> layout -> draw measure过程:计算view所占屏幕大小layout过程:设置view在屏幕的位置draw过程:绘制view 继承自view的控件的draw过程 draw方法是由viewRoot对象的performTraversale()方法调用的 draw方法中做了一下几个事:1.绘制view的背景2.为绘制渐变做准备3.回调onDraw()方法4.调用dispatchDraw()方法5.绘制渐变框与dr

[Android FrameWork 6.0源码学习] View的重绘过程之Draw

View绘制的三部曲,测量,布局,绘画现在我们分析绘画部分测量和布局在前两篇文章中已经分析过了.不了解的可以去我的博客里找一下下面进入正题,开始分析调用以及函数原理 private void performDraw() { if (mAttachInfo.mDisplayState == Display.STATE_OFF && !mReportNextDraw) { return; } final boolean fullRedrawNeeded = mFullRedrawNeede

View学习（四）-View的绘制（draw）过程

View的draw过程相比之于measrue过程,也是比较简单的.并且在我们自定义View时,也经常需要重写onDraw方法,来绘制出我们要实现的效果. 如之前的文章所说,绘制的流程也是起始于ViewRootImpl#perfomTraversals,ViewRootImpl#performDraw() 方法调用了ViewRootImpl#draw(boolean fullRedrawNeeded) ,其中这个boolean类型的形参,作用是判断是否需要重新绘制全部视图.最后调用的DecorVi

C#简单画图Draw研究学习

命名空间:using System.Drawing; Graphics类:有道词典翻译在C#里是封装一个 GDI+ 绘图图面,此类不能被继承. Pen类:定义用于绘制直线和曲线的对象. 此类不能被继承. Graphics g = new Graphics();创建画板对象 Pen p = new Pen();创建笔对象 Rectangle rec = new Rectangle(30,30,150,150);画矩形1 g.DrawRectangle(p,rec);画矩形2 g.DrawElli

opencascade draw 学习

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