something like measure(extent=[100,100,0],major=10,minor=2) you'd include this along with an object's transformations or on its own with its own transformations. (so it need not end up axis aligned) Sometimes you might have features from an extruded SVG or two objects with their own differently derived transformation that you just need to double check distances, often the axis measure is not near by or even obscured. This would be best as a design only tool, which would be ignored during STL export. yes I could create some kind of stand in object but that would never be as good as those axis lines as you are always subject to view scale... before diving into the code, I thought I'd canvas peoples views, would this be a waste of time or something that could be useful ?

Chris, I don't think this is worth to be included as a built in module. It is easy to code in OpenSCAD language to fit our needs. That is my version that will vanish on render mode: module rule(s,dir=[1,0,0],c1=[1,0.5,0.5],c2=[0,0,1]) { l = floor(s); r_to(dir) scale(1/l) for(i=[0:l-1]) { colour(i,c1,c2) % if(i==0) translate([l,0,0]) rotate([0,-90,0]) tip(l); else if(i==l-1) // the last tip may longer than 1 translate([i*l,0,0]) rotate([0,90,0]) tip(l*(1+s-l)); else if(!i%10 && i!=0) translate([i*l,0,0]) translate([l-l/4,0,-l/8]) linear_extrude(height=l/4) rotate(90) text(str(i),halign="center",size=l/2); else translate([(i+0.5)*l,0,0]) cube([l,l/2,l/2],center=true); } module tip(s) linear_extrude(height=s, scale=0.01) square(l/2,center=true); module colour(i,c1,c2) if(i%2) color(c2) children(); else color(c1) children(); module r_to(d) // rotate_from_to if(norm(d)<1e-16) rotate([0,-90,0]) children(); else mirror(d/norm(d)+[1,0,0]) mirror([1,0,0]) children(); } rotate([30,70,15]) { rule(10*sqrt(3),dir=[1,1,1]); %cube(10); } 2017-04-12 6:40 GMT-03:00 Mr C Camacho <chris@bedroomcoders.co.uk>: > something like > > measure(extent=[100,100,0],major=10,minor=2) > > you'd include this along with an object's transformations or on its own > with its own transformations. > (so it need not end up axis aligned) > > Sometimes you might have features from an extruded SVG or two objects with > their own differently derived transformation that you just need to double > check distances, often the axis measure is not near by or even obscured. > > This would be best as a design only tool, which would be ignored during > STL export. > > yes I could create some kind of stand in object but that would never be as > good as those axis lines as you are always subject to view scale... > > before diving into the code, I thought I'd canvas peoples views, would > this be a waste of time or something that could be useful ? > > > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >