Details
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Type:
Story
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Status: Done
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Resolution: Done
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Fix Version/s: None
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Component/s: SUIT
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Labels:
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Story Points:8
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Epic Link:
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Sprint:SUIT Sprint 2018-06
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Team:Science User Interface
Description
We are using plotly-1.28.2.min.js As of today, the latest release is plotly-1.38.3.min.js.
A lot of bugs in scattergl have been fixed, we might want to use scattergl for larger scatters.
One of the bugs still present in scattergl is disappearing error bars on relayout. For this reason, we might not want to use scattergl as a default plot when the number of points is reasonably low.
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Issue Links
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Activity
Plotly Github issue on the disappearing error bars: https://github.com/plotly/plotly.js/issues/2450 (comment)
Emmanuel Joliet I am waiting for your input.
There are 3 options to make sure we support any desired behavior:
// maximum table rows for scatter chart support, undefined means unlimited
maxRowsForScatter: undefined,
// maximum table rows for which the default chart is scatter, heatmap is created for larger tables
maxRowsForDefaultScatter: 5000,
// minimum number of points to use WebGL 'scattergl' instead of SVG 'scatter'
minScatterGLRows: 1000,
If IRSA does now want to go with scattergl just yet, we can set all values to be the same - this way the behavior will not change.
One limitation of WebGL, that the number of WebGL contexts is limited (usually 16 per browser), when the new context is created and the limit is exceeded, the oldest context is dropped.
Plotly is using 2 contexts per div, when one of the traces is 'gl'.
Pull Request: https://github.com/Caltech-IPAC/firefly/pull/627
See Pull Request for details.
One limitation of WebGL, that the number of WebGL contexts is limited (usually 16 per browser), when the new context is created and the limit is exceeded, the oldest context is dropped.
What would dropping a context mean in practice in Firefly? That a Plotly plotting frame would suddenly go blank? Become unresponsive? Or could it crash the browser's rendering process for the whole session?
Plotly uses 2 WebGL contexts per chart. If a chart is displayed and its context is dropped, the chart area will become blank, and a warning will appear on the console. The application will continue to work. For example, if the blanked chart is deletable, user can delete it or switch to a single chart view, etc.
To test the behavior, you can create a scatter of more than 1000 rows in Firefly, and keep adding more scatters from the top menu. At some point, when adding a scatter or going to expanded view some charts will become blank.
Tatiana Goldina Do you have a link to something like a Plotly Github issue on the disappearing error bars?