CurrentViewpoint.Position doesnt equal Position Readout in HUD

[jhdempsey]

Hi All

Im trying to get the camera position of the current viewport (i.e. the coordinates given by the position readout in the Heads Up Display or HUD) 

I have followed the solution in the below post, but the coordinates i get from the oDoc.CurrentViewpoint.Value.Position attribute are very different to whats shown in the position readout.

https://forums.autodesk.com/t5/navisworks-api/export-position-readout-coordinates-from-nwd-file-as-c...

In the screenshot below from my model, you can see the position readout X value is 491719.128, but the position X attribute through the API is 1613251.733

Can anyone explain why its different, and how to get he values shown on the position readout?

[alexisDVJML · Accepted solution]

Just my guess: you should use document Units to convert the values.
Taking your example "491719.128, but the position X attribute through the API is 1613251.733":

1613251.733 / 491719.128 = 3.28
1 feet = 305mm, 1m = 1,000mm => ratio m/ft = 3.28 😀 

[ulski1 · Accepted solution]

I have done this by calculating a scale factor - here is how I convert from model units to Meters

double MyScaleFactor = Autodesk.Navisworks.Api.Interop.LcOaUnit.ScaleFactor(Autodesk.Navisworks.Api.Units.Meters, Autodesk.Navisworks.Api.Application.ActiveDocument.Units);

there is properly a simpler way

br

Ulrik

[alexisDVJML]

I personally have all these conversion ratios in static tables and I cache it for the current document in my plugin using various events to update it where necessary.

BTW, this settled your issue, am I correct? Thus can mark it as solution ?

Your Sincerely.