Hello World of OpenCascade
2013-08-22 19:18
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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做进一步学习。选择的编程工具为Qt Creator,因为其也是开源的,其版本信息如下图所示:
![](http://www.cppblog.com/images/cppblog_com/eryar/Windows-Live-Writer/Hello-World-of-OpenCascade_10E0B/wps_clip_image-12889_2.png)
Figure 1.1 About Qt Creator
二、Hello World of OpenCascade
1. 新建工程:在Qt Creator中创建一个新的工程,选择Non-Qt Project -> Plain C++ Project,如下图所示:![](http://www.cppblog.com/images/cppblog_com/eryar/Windows-Live-Writer/Hello-World-of-OpenCascade_10E0B/wps_clip_image-12094_thumb.png)
Figure 2.1 Create a Plain C++ project in Qt Creator
2. 在工程文件中添加头文件路径及所需要用到的库文件,如下图所示:
![](http://www.cppblog.com/images/cppblog_com/eryar/Windows-Live-Writer/Hello-World-of-OpenCascade_10E0B/wps_clip_image-1389_thumb.png)
Figure 2.2 Set header file path and library
3. 程序的源代码如下所示:
/*
* Copyright (c) 2013 eryar All Rights Reserved.
*
* File : Main.cpp
* Author : eryar@163.com
* Date : 2013-08-22 18:52
* Version : 1.0v
*
* Description : Hello World program of OpenCascade.
*
*/
#include <iostream>
// OpenCascade library.
#define WNT
#include <Standard_CString.hxx>
int main(void)
{
Standard_CString strHelloWorld("Hello World!");
Standard_CString strHelloOcct("Hello OpenCascade!");
std::cout << strHelloWorld << std::endl;
std::cout << strHelloOcct << std::endl;
return 0;
}
4. 程序输出结果如下图所示:
![](http://www.cppblog.com/images/cppblog_com/eryar/Windows-Live-Writer/Hello-World-of-OpenCascade_10E0B/wps_clip_image-27256_thumb.png)
Figure 2.3 Program output
5. 程序代码说明:
l #include <iostream>:使用了C++的标准输入输出,如:std::cout;
l #define WNT:告知OpenCascade程序运行在Windows平台上。若不设置,当编译器为MSVC时,会出现如下编译错误:
// check if WNT macro is not defined but compiler is MSVC
#if defined(_MSC_VER) && !defined(WNT)
#error "Wrong compiler options has been detected. Add /DWNT option for proper compilation!!!!!"
#endif
l #include <Standard_CString.hxx>:使用OpenCascade中的字符串;
l 使用了两个字符串变量分别输出“Hello World!”和“Hello OpenCascade!”;
三、结论 Conclusion
在Qt Creator中以一个简单的示例程序,详细说明了在Windows平台使用OpenCascade开发需要注意的事项,为进一步研究、学习、使用OpenCascade奠定基础。
PDF Version: Hello World of OpenCascade
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