Script to place small circle on a curve line with several nodes

Hi henum,

Try something like this:

// YOUR SETTINGS
// ====================================
const RADIUS = '1mm';
const CIRCLE_PROPS = {
    fillColor:       'Black',
    strokeColor:     'None',
    // Etc... but don't change the line below.
    geometricBounds: ['-'+RADIUS,'-'+RADIUS,'+'+RADIUS,'+'+RADIUS],
    };
const parentSpread = function F(/*DOM*/o,  p)
//--------------------------------------  
// Get the parent spread of this DOM object, or NULL.
{
    p = o && o.parent;  
    if( (!p) || (p instanceof Document) ) return null;  
    return ( (p instanceof Spread) || (p instanceof MasterSpread) ) ? p : F(p);  
};
(function(/*?DOM[]*/a,  o,t,u)
//--------------------------------------  
// Place circles on the selected curve.
{
    // Check.
    // ---
    if( !a || 1 != a.length ) { alert( "Please select one object!" ); return; }
    if( !('paths' in (a=a[0])) ){ alert( "Please select a spline item!" ); return; }
    if( !(o=parentSpread(a)) ){ alert( "No parent spread found!" ); return; }
    // Create the template circle at [0,0] (ruler space.)
    // ---
    o = o.ovals.add(CIRCLE_PROPS);
    // Flat array of all pathpoints coordinates.
    // a :: [x,y] | [[lx,ly],[x,y],[rx,ry]]
    // ---
    a = [].concat.apply([],a.paths.everyItem().entirePath);
    // Duplicate the template at each point.
    // ---
    for( ; t=a.pop() ; o.duplicate(u,'number'== typeof t[0] ? t : t[1]) );
    
    // Remove the template.
    // ---
    o.remove();
})(app.properties.selection);

@+

Marc