How to update position of impoly vertices using setPosition within addNewPositionCallback?

Hi, I'm having difficulty with setPosition when used inside addNewPositionCallback with impoly. The vertices are not updating their position when a point is dragged. In this case vertex 5 remains unchanged when vertex 1 is dragged. Please see base example code below.

poly=[ -136 115; 40 115; 216 115; 216 15; 216 -185; 40 -185; -136 -185; -136 15];

figure

p = impoly(gca, poly) ;

addNewPositionCallback(p,@(pos)updatePos(pos));

function updatePos(pos)

    upDate=pos;

    upDate(5,:)=upDate(1,:);

    setPosition(p,upDate);

end

end

Answer 1

[Flavio Palmieri]

You need to pass p parameter in the callback function like this:

addNewPositionCallback(p,@(pos)updatePos(p,pos));

and then edit the function:

function updatePos(p,pos)

    upDate=pos;

    upDate(5,:)=upDate(1,:);

    setPosition(p,upDate);

end