catenary lines on a picture

Hello

I'm currently drawing straight lines between 2 selected controls on my PC, with a width of 5 pixels and shadow... so they resemble threads.

I prefer to join these points by a line which has a few "droop"... similar to the effect gravity.

Y at - it all blocks to calculate parabolic paths between 2 points? Or if someone has used a curve type block to do?

Or better yet, a path of overhead lines (such as the hyperbolic cosine)... so that they have a true path of gravity dependent.

Points can be anywhere on the front... not only on the same axis.

Thanks for your suggestions.

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Once the adjustment is done, the parameters are passed to a call by reference node that is connected to a reference of the VI that allows to calculate the catenary curve (even than the one used for the adjustment).  Points x are generated by the VI ramp with start and stop of the values determined by the maximum and the minimum of the clicked points.  In this way, you get a smooth curve even with three data points.  This curve is then sent to the XY graph that is updated in the case of the structure of the event time-out.

Tags: NI Software

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