How to read the actual z cursor position in a 3D surface when the x and y positions where set programmatically

[code-lux]

I set the x and y cursor position in a 3D surface with a property node. The cursor is shown at the right new position but the z Value is not recalculated. How can I force LabVIEW to recalculate?

[MelanieE]

Hi visablocked,

which 3D graph do you use in your application?

Regards,

Melanie

[code-lux]

I use 3D Surface: Graph -> 3D Graph -> Surface

[MelanieE]

Hi code-lux,

I did some research with the Surface 3D Graph. You can read or write the cursors Z position the same way you set the X and Y position. In the property node you can also select the cursors z position and read or write it. To change the access mode of a connection of the property node, right click it and select "Change to Read/Write".

I attached a screenshot, how my code looks like.

Regards,

Melanie

[code-lux]

Hi Melaniee

Thanks for your efforts. This is exactly what I have. The problem is now that the z position that you get from the property node is not the right z position for the cursor position you just set with the property node but it is the z position that corresponds to the last position set by dragging the cursor with the mouse.

I called NI support and it seems like it is not possible to use the cursor in that way. I was recommended to calculate the value from the data that is fed in to the graph. This is what I'll do.

Nevertheless all the z positions including the interpolated values are in memory for the display of the 3D surface and there should be a way to access them. Any hints how to do that are highly appreciated.

[MelanieE]

Hi code-lux,

maybe you could try to set the initial cursor position at the start of your program to (0|0|0) via the property node. Afterwards you can continue calculating the current position of the cursor using the relative data from the property node.

Regards,

Melanie