aos/analysis/plot_data.fbs

// This flatbuffer defines the interface that is used by the in-process
// web plotter to plot data dynamically. Both the structure of the plot and
// the data to plot is all packaged within a single Plot message. Each Plot
// message will correspond to a single view/tab on the web-page, and can have
// multiple figures, each of which can have multiple lines.
namespace aos.analysis;

// Position within the web-page to plot a figure at. [0, 0] will be the upper
// left corner of the allowable places where plots can be put, and should
// generally be the default location. All values in pixels.
table Position {
  top:float (id: 0);
  left:float (id: 1);
  width:float (id: 2);
  height:float (id: 3);
}

struct Point {
  x:double (id: 0);
  y:double (id: 1);
}

// RGB values are in the range [0, 1].
struct Color {
  r:float (id: 0);
  g:float (id: 1);
  b:float (id: 2);
}

table LineStyle {
  point_size:float (id: 0);
  draw_line:bool (id: 1);
}

table Line {
  label:string (id: 0);
  points:[Point] (id: 1);
  color:Color (id: 2);
  style:LineStyle (id: 3);
}

table Figure {
  position:Position (id: 0);
  lines:[Line] (id: 1);
  // Specifies whether to link the x-axis of this Figure with that of other
  // figures in this Plot. Only the axes of Figure's with this flag set will
  // be linked.
  share_x_axis:bool (id: 2);
  title:string (id: 3);
  xlabel:string (id: 4);
  ylabel:string (id: 5);
}

table Plot {
  figures:[Figure] (id: 0);
  title:string (id: 1);
}

root_type Plot;