Can points be added to an existing sketch with feature script?

ron_moreland

I want to add functionally derived points to a sketch to use as anchors. Can I do this with feature script?

In a way I'm asking to create a custom constraint.

konstantin_shiriazdanov

via FS you can't make editable sketches and can't modify existing sketches except deleting. but you can generate by FS a number of 3d points and reference them from the sketch

konstantin_shiriazdanov

via FS you can't make editable sketches and can't modify existing sketches except deleting. but you can generate by FS a number of 3d points and reference them from the sketch

ron_moreland

That's what I thought. Thanks

ron_moreland

BTW, Can you now create arbitrary points in 3 space, or do you need to create multiple sketches?

konstantin_shiriazdanov

opPoint() creates a point in 3d, or you can create a sketch with a number of points by skPoint(), but all of them will be in one plane.

ron_moreland

I am having trouble with this code:

   var fPoints is array = [];
        var L = 10.0;
        var CL = L;
        var Rule = 1.0 ;
        for (var i = 0; i < definition.numberOfF; i += 1)
        {
            fPoints = append(fPoints,vector(0,CL*inch));
            CL = CL/Rule;
        }
        
        skPolyline(sketch1, "polyline1", {
                    "points" : fPoints
                });

I'm getting "Precondition of skPolyline failed (is2dPointVector(value.points))" in the error window.
Can you see the problem? I suspect I need to declare a vector array, but I don't know how to do that.

konstantin_shiriazdanov

you should use following syntax to generate array of 2d point coordinates
point = vector(0, CL) * inch;
fPoints = append(fPoints, point);
but "point" should depend on loop index "i", or you would obtain array of one the same point "vector(0, CL) * inch"
and one more thing - to add geometry to 2d sketch you need to initialize the sketch first by means of mySk = newSketch() or mySk = newSketchOnPlane() functions and after the geometry added sketch should be solved by skSolve(mySk)

ron_moreland

Thanks, I just posted this same question as a new post. I'll set it as asked/answered.

ron_moreland

That worked! Why did the point have to be created outside the append?

ilya_baran

It didn't -- the key change is that the multiplication by inch is outside the vector -- otherwise you get a vector with one component a number and one component a length.

ron_moreland

OH! Number != Length... got it

ron_moreland

I just posted another question that I stuck on. Do you have time to look at it?