在折线图中显示数据 [英] show data in line graph

问题描述

我有一个伺服电机，它在运行时反馈其速度.
我希望创建一个可以以图形方式显示速度数据的窗口-
就像Windows任务管理器中的CPU使用历史一样...

I have a servo motor which feeds back its velocity while running.
I wish to make a window that can show the velocity data graphically -
just like the CPU usage history in windows task manager...

Any idea on how to make this?

推荐答案

要绘制图表，可以看看我的一篇有关图表控件的文章:

For drawing a chart, you can have a look at one of my article about a chart control: High-speed Charting Control[^].

分配循环缓冲区，使用计时器对值进行采样(让'例如... 1/10秒?)，然后将值排队在缓冲区中，扔掉最早的.

同时，使窗口无效，并绘制一条线，该线的振幅与最大期望值成比例，且与窗口高度有关.

如何在Windows上的C ++中做到这一点……我想您已经具备了基础知识，否则，我看不出您负担不起什么编程问题.

Allocate a circular buffer, sample the value with a timer (let''s say ... 1/10 of a second ?) and queue the values in the buffer, throwing away the oldest.

At the same time, invalidate a window, and paint a line whose amplitude is proportional to the maximum expected value, respect to the window height.

How to do that in C++ over windows ... I suppose you have the basics, otherwise, I don''t see how ca you afford whatever programming problem.

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