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研究图形缩放功能的设计与实现,对于软件的开发有着实际的应用价值,尤其是在试井解释软件中存在着大量的双对数及半对数坐标系,且缩放功能是该类软件实现其他功能的基础,因此对数坐标系下图形缩放功能的设计与实现研究对开发类似软件就成为必要。系统地阐述了普通直角坐标系、双对数及半对数坐标系下图形缩放功能的设计及算法推导,给出了相关坐标转换公式,随后利用该思路在VS2010环境下开发的试井解释软件为例,进行了详细测试,测试结果表明按该思路设计实现的软件运行正确、可靠。
Researching the design and implementation of graphics zooming has practical application value for software development. Especially in well testing software there are a large number of double logarithms and semi-logarithmic coordinate systems, and the zoom function is that the software implements other Therefore, the study of design and implementation of graph scaling in logarithmic coordinate system becomes necessary to develop similar software. This paper systematically expounds the design and algorithm derivation of graphic scaling functions in ordinary Cartesian coordinate system, double logarithm and semi-logarithmic coordinate system, and gives the related coordinate conversion formula, and then uses well testing interpretation software As an example, conducted a detailed test, the test results show that the software designed and implemented by the idea of running correctly and reliably.