NX VB Journal - How to Use uf.modl.askfacedata 1

[jmarkus]

I have defined the following variables

dim face_t As tag
dim ftype as integer
dim pnts(4,3) as double
dim vecv(4,3) as double
dim box(6) as double
dim junk2 as double = Nothing
dim junk1 as integer = Nothing

And now I am inquiring about some face properties using:

ufs.modl.askfacedata(face_t, ftype, pnts(jj,0), vecv(jj,0), box, junk2, junk2, junk1)

NX is telling me "Value of type 'Double' cannot be converted to '1-dimensional array of Double'" twice, but I don't know what it is referring to. According to the NXOpen .Net API reference I've defined all the variables with their correct data types.
Or have I?
Can someone help?

Thanks,
Jeff

 

[cowski]

The variables pnts and vecv should be 1 dimensional arrays. Try this (untested):

dim face_t As tag
dim ftype as integer
[highlight]dim pnts(2) as double
dim vecv(2) as double
dim box(5) as double[/highlight]
dim junk2 as double = Nothing
dim junk1 as integer = Nothing

ufs.modl.askfacedata(face_t, ftype, [highlight]pnts, vecv, box,[/highlight] junk2, junk2, junk1)

You might get an error because you are passing in junk2 twice. This variable will be used as an output from the function; it may be OK, or it may throw an error because it is trying to write 2 different outputs to the same variable.

http://www.nxjournaling.com

 

[jmarkus]

Shouldn't pnts & vecv have 3 elements since I thought they are supposed to be point coordinates and axis directions?

Also, if I want to have data for multiple points on the surface is it not possible to use 2d arrays, somehow?

Thanks,
Jeff

 

[cowski]

Arrays are zero based. So the pnts(2) array consists of 3 elements:[ul][li]pnts(0)[/li][li]pnts(1)[/li][li]pnts(2)[/li][/ul]
The same holds true for the vector array.

According to the help file, it doesn't look like you get to input the point and vector information for this function (they are outputs only). What information are you looking to get? Perhaps UF_MODL_ask_face_props would be more appropriate, it allows you to input the face tag and UV parameters you are interested in.

http://www.nxjournaling.com

 

[jmarkus]

Thanks! That is what I wanted all along, but for some reason I thought the VB equivalent of UF_MODL_ask_face_props was ufs.modl.askfacedata. Now it makes sense. Let me play for a bit and report back!

Jeff

 

[cowski]

By default arrays are zero based.

Fixed.
There are ways to define a different lower bound, but I would discourage their use unless you have a really good reason.

http://www.nxjournaling.com

 

[jmarkus]

I managed to get the askfaceprops method to work, but now I have decided I need to change my overall method for the task I am working on. I'm sure I'll be posting more queries on the next hurdle.

Jeff