Performance Issue

[X-ray]

Hello,

We have some performance problems drawing large TColorGridSeries of sparse matrices, see attached plot. Basically, there is only the small diagonal patch in the middle where there is data to plot:

IsoLinesPlotScreenshot 2025-07-10 150510.png (359.69 KiB) Viewed 427 times

The area of the Red Triangles is empty and doesn’t contain any data. Is there a way to speed up handling and drawing by telling the plot that there are parts of the data that don’t need to be plotted?

Thanks and best regards,
Thomas

[Yeray]

Hello Thomas,

Do you have a simple example we can run as-is to reproduce the situation here?
Thanks in advance.

[X-ray]

Hello Yeray,

By Binning the Matrix down to about screen resolution I was able to improve the performance.
In addition I used Series.SetNull(Index) to hide areas.
Like this:

if FIsoLines3D then
begin
var IndexSurface := ScanSurfaceSeries.AddXYZ(aX, ScanSurfaceSeries.DefaultNullValue, aZ);
ScanSurfaceSeries.SetNull(IndexSurface);
end else
begin
var IndexColorGrid := ScanColorGridSeries.AddXYZ(aX, ScanColorGridSeries.DefaultNullValue, aZ);
ScanColorGridSeries.SetNull(IndexColorGrid);
end;

This works nicely for TColorGridSeries but it obviously doesn't work for SurfaceSeries!?
Please see Screen Shots.

ColorGridPlotSetNullWorking.png (220.87 KiB) Viewed 8 times

SurfacePlotSetNullNotWorking3.png (375.4 KiB) Viewed 8 times

Thanks and best regards,

Thomas