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IntensityGrid and logarithmic Scaling
Posted: Tue Aug 02, 2016 1:31 pm
by ahe
There seems to be a new issue with logarithmic scaling with IntensityGridSeries, in our application it looks like the geometry of the grid gets distorted:
- application_logarithmic.png (10.34 KiB) Viewed 40684 times
I created a minimal test application to reproduce it. While it is not as bad, I can still make out a few odd edges where there should be none.
Expected behaviour (LighningCharts 6.5.8):
- intensitygrid_logarithmic_v6_5_8.png (138.91 KiB) Viewed 40684 times
LighningCharts 7.1.1 (7.0.18 identical):
- intensitygrid_logarithmic_v7_1_1.png (26.74 KiB) Viewed 40684 times
Windows 7 pro 64bit SP1, Intel i7, 16GB RAM, GeForce GT 730, current drivers, two HD-monitors.
Re: IntensityGrid and logarithmic Scaling
Posted: Tue Aug 02, 2016 2:05 pm
by ArctionPasi
Hi!
could you send that app to our support by e-mail so we can take a deeper look?
Re: IntensityGrid and logarithmic Scaling
Posted: Tue Aug 02, 2016 2:08 pm
by ahe
[continued]
Sample code, tested with 6.5.8, 7.0.18 and 7.1.1 (change the references and use respective #define in Form1.cs)
It gets stranger: v7 does only render with PixelRendering=false and ScaleType.Linear. I can't figure out why it's working with v6 and in the v7.1-SDK's demo app though.
Re: IntensityGrid and logarithmic Scaling
Posted: Tue Aug 02, 2016 2:26 pm
by ahe
OK, I found out the problem:
I am using IntensityGridSeries.SetValuesData with data[][]. This only seems to be compatible with PixelRendering and not with Interpolation.
When I changed it to IntensityGridSeries.Data with IntensityPoint[,], it works as expected:
- intensitygrid_logarithmic_v7_1_1_data.png (110.05 KiB) Viewed 40679 times
Re: IntensityGrid and logarithmic Scaling
Posted: Tue Aug 02, 2016 2:55 pm
by ArctionPasi
That's right, SetValuesData is suitable only for PixelRendering. PixelRendering is suitable for linear axes only, because it uses GPU side texture, and that is naturally evenly spaced in screen space. I'm glad you were able to solve this
Re: IntensityGrid and logarithmic Scaling
Posted: Fri Aug 05, 2016 1:47 pm
by ahe
- Reproduced_7_0_18.png (93.54 KiB) Viewed 40657 times
Occurs in 7.0.18, but not in 7.1.1 or 6.5.8. Sample source is attached.
I'll try updating to 7.1.1 hoping that it won't break anything.
Re: IntensityGrid and logarithmic Scaling
Posted: Fri Aug 05, 2016 2:21 pm
by ArctionPasi
I sent you link to intermediate build 7.1.1.2 by e-mail. With that it looks like:
- Fixed intensity chart
- heatmap.jpg (116.21 KiB) Viewed 40654 times