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 Interline coloring between splines |
| Posted by Jim Johnson on Mar-30-2025 01:26 |
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Greetings Peter -
Quick question. I have tried AddZone and c.addInterLineLayer to color the area between spline layer 1 (Max values) and spline layer 2 (Min values) so the latter is always > than the former. I know this must be relatively easy but not having any luck getting it to work.
I am attaching a typical chart which has Max, Avg and Min. What I would like is for the Max and Min to just be a pointless zone and show the points on the Avg - this will make the chart easier for users to view.
Thank you Peter for your time, you've been a great help over the years.
Jim Johnson
Gainesville, FL, USA
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| Re: Interline coloring between splines |
| Posted by Peter Kwan on Mar-31-2025 14:15 |
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Hi Jim,
You can use c.addInterLineLayer. The followings are some examples:
https://www.advsofteng.com/doc/cdnet.htm#linefill.htm
https://www.advsofteng.com/doc/cdnet.htm#linecompare.htm
For your case, if the two spline curves are from two different spline layers, you can use:
c.addInterLineLayer(splineLayer1.getLine(), splineLayer2.getLine(), &HCF33FF33)
If the two spline curves are different data sets for the same splineLayer, you can use:
c.addInterLineLayer(splineLayer.getLine(0), splineLayer.getLine(1), &HCF33FF33)
For example, consider the "Spline Line Chart" sample code:
https://www.advsofteng.com/doc/cdnet.htm#splineline.htm
In the above code, the two splines come from the same spline layer, so the code to fill the region in between is:
c.addInterLineLayer(layer.getLine(0), layer.getLine(1), &HCF33FF33)
Hope this can help.
Regards
Peter Kwan |
| Re: Interline coloring between splines |
| Posted by Jim Johnson on Mar-31-2025 23:01 |
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Peter -
Resulting chart. Thanks for the help Peter.
Jim Johnson
Auburn, AL, USA
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