what is the correct spelling for $CURVATURE ?
it isn't in the help page for measure, as usual.

You could just use point(“../curvature”,$PT, “curvature”,0) instead.

or add another attribute with that expression so that you can use its local variable.

Does anybody know how to make a local variable if one doesn't exist (without creating another attribute).

You can add a local variable by adding the attribute again and initialising it to it's local variable. For example in this case, use an attribute create sop, set the name the curvature and in the value type $CURVATURE. It will retain the values and add the mapping.

Hope that works for you.

Koen

I can only get it to work when i set the measure op to ovveride the name to area and use $AREA in the delete op

Thanks Sam, there really needs to be a concise alias for
point() when querying points of the current sop…
something lile ‘$’ perhaps!
then we can just type $CURVATURE :shock:

If I use an Attribute Create node to create “curvature”, it replaces all the values for each point with “0”. The

point(“../object_merge1”, $PT, “curvature”, 0) > 2

expression in the Delete by Expression box in the Delete node selects no points. I think that expression would use $CURVATURE (also does not work), but as with the simpler

$CURVATURE > 2

there's no variable mapped to $CURVATURE despite the Measure node.

Wigal123's solution works.

SamHancock
Does anybody know how to make a local variable if one doesn't exist (without creating another attribute).

Looks like one can just create a “varmap” string detail attribute and give it a value “curvature -> CURVATURE” and it works..

Or in pointwrangle:
addvariablename(“curvature”, “CURVATURE”);

Or in AttribCreate sop
Name: curvature
Local Variable: CURVATURE
Write Values: turn off