[Plots] Very large values cause entire plot to disappear

[jvigliotta]

Summary

When there is a very large telemetry value (in this case -7.5e+177) within the time range, the VISTA plot is blank, even though there are data points in the range. This example is for a short time range, but if you expand the time boundaries (e.g. over a week or more), you will see that the whole plot is blank. This makes it seem like data is missing, but it’s a plotting bug.

Follow up for test: #7139

Expected vs Current Behavior

At the very least the rest of the plot should still be plotted.

Steps to Reproduce

1. View a plot with values that would break a Float32Array (we have an option for this in the sine wave generator)
2. Once a value that exceeds Float32Array capabilities (Above 3.4+38, Below -3.4+38) appears in the plot, the whole thing disappears

Impact Check List

• Data loss or misrepresented data?
• Regression? Did this used to work or has it always been broken?
• Is there a workaround available? (viewing in log mode, which is basically useless at these ranges)
• Does this impact a critical component?
• Is this just a visual bug with no functional impact?
• Does this block the execution of e2e tests?
• Does this have an impact on Performance?

[jvigliotta]

Testing

• follow the reproduction steps
• with the fix, you should see gaps in the plot and if you hove over them, you should see the values that are missing

[khalidadil]

Verified Fixed in Testathon on 10/26/23

[ozyx]

Verified Testathon 11/13/23, plots don't disappear, only small gaps