query point coordinate

pierre_gr

Hi,

I have a feature script which creates 2 line and place a point of the intersection, like

        skPoint(gearSketch, "A", {
                "position" : center + vector(1, 0) * (pitchCircleRadius + addendum)
        });
        skConstraint(gearSketch, "A_coincident1", {
                "constraintType" : ConstraintType.COINCIDENT,
                "localFirst" : "A",
                "localSecond" : "axis"
        });
        skConstraint(gearSketch, "A_coincident2", {
                "constraintType" : ConstraintType.COINCIDENT,
                "localFirst" : "A",
                "localSecond" : "pitchCircle"
        });

It works fine but how do I query the new location of the point A, after the constraint are applied, and continue my sketch after that ?



Thank you,

lana

Sketch constraint is not applied when written, rather it is added to constraint system which is solved in function skSolve(). 
When writing custom feature it is better to work out your sketch geometry instead of using constraints. Are you looking for an intersection point of circle and line?

pierre_gr

Yes, a line and a circle in that case, so I can do it by calculus, but at the end, what I'm trying to do is to generate the sketch of a spur gear (the existing spur gear feature generate the body) and doing it with constraints is much much easier.

From your answer, does it means I case do an skSolve and project the point onto a new plane/sketch ?

if so, how can I evaluate the coordinate of a point from it's pointId ?

Doc: http://www.gearseds.com/files/Approx_method_draw_involute_tooth_rev2.pdf

lana

After skSolve is called there'll be a vertex corresponding to the sketch point. You can use 

const pointQ = sketchEntityQuery(sketchId, EntityType.VERTEX, "A") query to identify it, and evVertexPoint(context, {'vertex' : pointQ}) to get its xyz location.

A warning, though, unless you eliminate more degrees of freedom with additional constraints, you don't know which geometry will change when sketch is solved.

pierre_gr

Thank you very much.
It can be marked as solved.