[BUG] Narrow peaks can exceed plot area

[TomDeRybel]

Describe the bug The line drawing seems to have an overshoot issue for very narrow peaks. These overshoots can reach beyond the drawing area.

Some examples of the observed behavior:

• Very narrow peaks can exceed the drawing area, as shown in the screenshot. (35Hz peak)
• Very narrow peaks within the drawing area can generate artifacts where the displayed peak exceeds the data points. Note that no Y-data is larger than +30 dB, yet the peak goes higher. (1600Hz peak)
• When the peak is a few pixels wide, it nicely clips (or perhaps does not trigger the overshoot issue) (250Hz peak)
• I am not sure the specified line width remains respected for these sharp peaks (could also be due to aliasing).

To Reproduce Plot data with very narrow peaks that exceed the plot area. The peaks have to be steep enough that they are but a pixel wide or so when rendered. The attached code example includes data that illustrates these issues.

Version Information plotters: git version fltk: 1.3.6

plotters_doodle.zip

[Feng23]

Thank you for creating the issue! Could you share some minimal reproducible example code? That would help us debug.

[TomDeRybel]

I have added a working, minimal example project, as well as updated the description with additional information and observations. Thank you for looking into this!

[38]

Hi there, I've pushed a fix. Could you please confirm this is fixed. Thanks!

Feel free to reopen it if the fix doesn't work.

[TomDeRybel]

Thank you for your work! I can confirm that the issue is fixed.