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Writing a measured value to a variable in the model tree and keeping it updated.

Chris_LoughnaneChris_Loughnane Member Posts: 4 PRO
Essentially I'm trying to recreate a 'sensor' or User-Defined Measurement. In the simplest case I have an arc, would like to evaluate it's length, then store that number in a variable so that I can reference it later in my model tree. 

I'm just jumping into featurescript so it's not immediately obvious to me how to do this, if I can do it, or if it's already been done.

Comments

  • abefeldmanabefeldman Member Posts: 166 ✭✭✭
    edited July 2017
  • Chris_LoughnaneChris_Loughnane Member Posts: 4 PRO
    Using the suggestions above made a slight adjustment in order to measure length

    annotation { "Feature Type Name" : "Measure Length", "Feature Name Template" : "###name = #value", "UIHint" : "NO_PREVIEW_PROVIDED" }    export const measureLength = defineFeature(function(context is Context, id is Id, definition is map)    precondition    {        annotation { "Name" : "Name", "Default" : "length" }        definition.name is string;
            annotation { "Name" : "First entities", "Filter" : EntityType.EDGE }        definition.first is Query;
            // annotation { "Name" : "Second entities", "Filter" : EntityType.FACE || EntityType.EDGE || EntityType.VERTEX || EntityType.BODY }        // definition.second is Query;
            // annotation { "Name" : "Maximum" }        // definition.maximum is boolean;    }    {        if (!match(definition.name, '[a-zA-Z_][a-zA-Z_0-9]*').hasMatch)            throw regenError(ErrorStringEnum.VARIABLE_NAME_INVALID);                    const lengthResult is ValueWithUnits = evLength(context, {                "entities" : definition.first        });
            // if (!tolerantEquals(p0, p1))        // {        //     debug(context, line(p0, p1 - p0));        //     debug(context, line(p1, p0 - p1));        // }        // else // If it's the same point, just draw the point        // {        //     debug(context, p0);        // }
            setVariable(context, definition.name, lengthResult);
            setFeatureComputedParameter(context, id, { "name" : "value", "value" : lengthResult });    });

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