Creating 2D graphic strip chart with trace wrapping



Hi,

I am writing an application to display a 2D graphic strip chart of
data.

The dynamic range of some of the data traces is quite large, so I would
like to wrap them between upper and lower limits. If the data value
"shoots through" the upper limit, it re-enters from the lower limit. If
the data value "drops through" the lower limit, it re-enters from the
upper limit.

Is there an OpenGL strategy to automate the trace wrapping? Is it
somehow possible to reflect the 2D line at the upper and lower bounds,
to reappear at the opposite bound?

Otherwise it will be tricky (not to mention slow) to manually scan
through the data, looking for places where the graphic trace needs to
be wrapped.

The data traces I am drawing are quite large, on the order of thousands
of data points, sometimes tens of thousands. I am already using vertex
arrays to draw the traces quickly.

Any insight will be appreciated.

Thanks,
Markus.

.



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