How can I use FeatureScript to get the longest edge of a part as a computed property

elias_bonauer

I try to create a feature script that lets me get the longest edge of a part as a computed property in a user defined table.

So far I had no success other than get the compuedVolume as shown in an example somewhere.

Can yomebody give me a hint or an example how to get all edges, find the logest and rturn that as a computed propery?

Any help is highly appreciated!

elias_bonauer

Ok, i figured it out, I needed to use evaluateQuery and then return the value at index 0

annotation { "Property Function Name" : "longestEdge" }
export const longestEdge = defineComputedPartProperty(
             function(context is Context, part is Query, definition is map) returns ValueWithUnits
    {
       var longestEdge = evaluateQuery(context, qLargest(qOwnedByBody(part, EntityType.EDGE)));
       return evLength(context, {
               "entities" : longestEdge[0]
       });       
    });

Jacob_Corder

annotation { "Feature Type Name" : "Longest Edge" }
export const longestEdge = defineFeature(function(context is Context, id is Id, definition is map)
    precondition
    {
         annotation { "Name" : "Allow Wire Bodies","UIHint":UIHint.REMEMBER_PREVIOUS_VALUE }
         definition.allowWireBodyEdges is boolean;         
    }
    {
        
        var attributeName = "longestEdge";//set this to whatever name you want
        var edgeQuery=qEverything(EntityType.EDGE) ;
        if(!definition.allowWireBodyEdges) edgeQuery =  qSubtraction(edgeQuery,qEdgeTopologyFilter(edgeQuery, EdgeTopology.WIRE));         
        edgeQuery = qUnion(evaluateQuery(context, qLargest(edgeQuery)));//this executes the longest portion which is qLargest and wraps it in qUnion so evaluation does not happen again.
        setAttribute(context, {
                "entities" : edgeQuery,
                "name" : attributeName,
                "attribute" : {}
        });
        //Then later call qHasAttribute to get the edge in the table
        var attributedEdge = qHasAttribute(attributeName);
        addDebugEntities(context, attributedEdge, DebugColor.GREEN);
    });

that should do it

elias_bonauer

Thanks for your answer, but this does not give me computed properties in the custom table.

The example with the volume looks like this:

annotation { "Property Function Name" : "longestEdge" }
export const longestEdge = defineComputedPartProperty(
             function(context is Context, part is Query, definition is map) returns ValueWithUnits
    {
        return evVolume(context, { "entities" : part });
    });

How can I use this as a computed property?

Caden_Armstrong

@elias_bonauer

Jacob wrote a feature to find the longest edge.
For a computed property, the query for part is given already so the code is a bit shorter:

annotation { "Property Function Name" : "longestEdge" }

export const longestEdge = defineComputedPartProperty(

             function(context is Context, part is Query, definition is map) returns ValueWithUnits

    {

       var longestEdge = qLargest(qOwnedByBody(part, EntityType.EDGE));

       return evLength(context, {

               "entities" : longestEdge

       });

    });

elias_bonauer

Hi Caden,

this works as expected, thank you so much!

I just realized that this gives me the sum of all longest edges, not only the length of 1 longest 

elias_bonauer

Ok, i figured it out, I needed to use evaluateQuery and then return the value at index 0

annotation { "Property Function Name" : "longestEdge" }
export const longestEdge = defineComputedPartProperty(
             function(context is Context, part is Query, definition is map) returns ValueWithUnits
    {
       var longestEdge = evaluateQuery(context, qLargest(qOwnedByBody(part, EntityType.EDGE)));
       return evLength(context, {
               "entities" : longestEdge[0]
       });       
    });

Caden_Armstrong

Right, I forgot that qLargest can return multiples if there is a tie. You could also just do qNthElement instead of evaluating.