On Sat, Aug 24, 2024 at 7:07 PM Adrian Mariano <avm4@cornell.edu> wrote: > I believe that the approach Sanjeev uses is not to use python to generate > openscad code but to use python to generate the entire object as a > polyhedron and then just pass that to openscad to be rendered. You can of > course produce any object this way if you work hard enough on your python > code. > Ah I thought there was some sort of higher level interface that generated / interfaced with OpenSCAD. I'm still wondering how to generate the posted example though. > I don't see a way that you can fill the little gap with join_prism(). If > you allow self-intersection you won't be able to create an STL. Does that > matter to you? > Oh I didn't realize that, didn't get that far yet - yes it matters to me, the end goal is to 3d print this. > A lot of the limitations in the join_prism() implementation result from > the need to have an interface to the module. I made it as general as I > could figure out how to make it, but it can't do everything. And as noted > by others, it's already not the most accessible interface. > I understand how this is a very complex problem, I haven't even really visualized in my head what exactly the result should look like, I was mostly hoping I could find a way that did the thinking for me and I could just poke the code until it looked like it would work :) I think that join_prism() is an amazing piece of work for which I have thought up several applications already, just not this one then I'm afraid. regards Roel

 difference() {
     union() {
         // The outer cylinder that will make the presser handle ring
         up(g_wall_thickness + g_presser_height * 1.5)
             ycyl(l = g_presser_width, d=g_presser_size * 4, rounding

code is below: # first need to import the library openscad1.py to create objects # https://github.com/sprabhakar2006/openSCAD/blob/main/openscad1.py # also need to download library dependencies2.scad # https://github.com/sprabhakar2006/openSCAD/blob/main/dependencies2.scad from openscad1 import * # create center pillar c1=circle(10) # circlular section # p1 is path to create an object, it is similar to the rounding library in openscad p1=corner_radius(pts1([[100,0],[-100,0,5],[0,70,3],[-3,0]]),30) sol1=prism(c1,p1) # prism is a function which offsets the section c1 in # create another surface for supports l1=corner_radius(pts1([[-2.5,0],[0,50,2],[5,0,2],[0,-50]]),10) l1=equidistant_path(l1,500) l1=q_rot(['x90','z45'],l1) v1=q_rot(['y45','z-45'],[100,0,0]) s1=surface_line_vector(l1,v1) l1=ip_surf2sol(sol1,s1) # first intersection points l2=ip_surf2sol(sol1,s1,n=-1) l1=l1+flip(l2) l2=o_3d(l1,sol1,-3) sol2=prism(c1,path_offset(p1,3)) l3=ip_surf2sol(sol2,s1) # first intersection points l4=ip_surf2sol(sol2,s1,n=-1) l3=l3+flip(l4) l3=path2path1(l1,l3) # function to make both lines points same # now make a fillet with these 3 lines fillet1=convert_3lines2fillet_closed(l2,l3,l1) sol3=translate([0,0,-5],linear_extrude(corner_radius(pts1([[-50,-50,5],[100,0,5],[0,100,5],[-100,0,5]]),10),5)) with open('trial.scad','w+') as f: f.write(f''' include<dependencies2.scad> for(i=[0,90,180,270]) rotate([0,0,i]){{ hull() color("blue")p_line3dc({l1},.01,1); {swp(sol1[1:])} {swp_c(fillet1)} }} {swp(sol3)} ''') [image: Screenshot 2024-08-25 at 12.05.55 AM.png] On Sat, 24 Aug 2024 at 21:08, Roel Vanhout <roel.vanhout@gmail.com> wrote: > This is amazing, would you mind sharing the code that created this? I > write Python every day and I'm much more comfortable with it than with > straight OpenSCAD, but I always thought that using Python to generate > OpenSCAD code was mostly syntactic sugar like having 'real' for loops with > updating variables and such, I didn't know (and still don't quite see how > tbh) that it also allowed for such complex shapes. > > cheers > > > On Sat, Aug 24, 2024 at 5:49 AM Sanjeev Prabhakar < > sprabhakar2006@gmail.com> wrote: > >> I gave it a try >> [image: Screenshot 2024-08-24 at 9.16.07 AM.png] >> >> On Fri, 23 Aug 2024 at 16:19, Roel Vanhout via Discuss < >> discuss@lists.openscad.org> wrote: >> >>> Hello all, >>> >>> I have a complex shape to round for which I'd like to ask if anyone has >>> suggestions on how to approach this. I've always found rounding and >>> chamfering to be very tedious using plain OpenSCAD until I found how to do >>> it with BOSL2, which has been a godsend for the cases I've encountered so >>> far. But today I have the shape in the picture below, for which the code is >>> at the bottom. I'm looking to round out all surfaces of the 'fins' that >>> radiate out from the center 'stem' come in contact with other surfaces. >>> (this is a presser tool for stuffing food into a mold, the 'fins' are to >>> distribute the pressure that is manually exerted on the ring to the bottom >>> platelet). >>> >>> I've marked the various lines that need to be rounded out in different >>> colors. Out of these, the turquoise one I could do with a BOSL2 >>> rounding_edge_mask(), and the green one too if I use an appropriate 'ang' >>> parameter (which I can calculate fairly easily). However I have no idea how >>> to do the red one or the orange one, nor how to let e.g. the orange one >>> blend smoothly into the green one for example; and the same for all the >>> other places where roundovers meet. >>> >>> Any ideas on how I can do this? Thank you. >>> >>> regards >>> >>> Roel >>> >>> >>> [image: presser_foot_rounding.png] >>> >>> >>> >>> >>> >>> >>> include <BOSL2-master/std.scad> >>> include <BOSL2-master/screws.scad> >>> include <BOSL2-master/threading.scad> >>> >>> ZFE = 0.01; // Z fighting epsilon, a constant to prevent planes from >>> overlapping. >>> // It has a separate name so that you know where it's >>> used what it's for. >>> ZFE_2 = ZFE * 2; >>> ZFE_3 = ZFE * 3; >>> $fn = $preview ? 64 : 128; >>> >>> // Global >>> g_corner_rounding = 2; >>> >>> // Ring >>> g_wall_thickness = 3; >>> g_inside_size = 90; >>> g_height = 70; >>> >>> // Lid >>> g_lid_play = 1; >>> g_presser_height = 30; >>> g_presser_width = 20; >>> g_lid_rounding = 5; >>> g_presser_size = 10; >>> >>> module ring() { >>> outside_size = g_inside_size + (2 * g_wall_thickness); >>> //cuboid([g_wall_thickness, depth, clip_height], chamfer=1, >>> edges="X", anchor=LEFT+BOTTOM+FRONT); >>> difference() { >>> cuboid([outside_size, outside_size, g_height], >>> rounding=g_corner_rounding, edges="Z"); >>> cuboid([g_inside_size, g_inside_size, g_height + ZFE_2], >>> rounding=g_corner_rounding, edges="Z"); >>> } >>> } >>> >>> module presser() { >>> cuboid([g_inside_size - g_lid_play, g_inside_size - g_lid_play, >>> g_wall_thickness * 2], rounding=g_corner_rounding, edges="Z"); >>> >>> difference() { >>> union() { >>> // The outer cylinder that will make the presser handle ring >>> up(g_wall_thickness + g_presser_height * 1.5) >>> ycyl(l = g_presser_width, d=g_presser_size * 4, rounding >>> = g_corner_rounding); >>> // The 'stem' of the presser handle >>> up(g_wall_thickness + g_presser_height / 2) >>> zcyl(l = g_presser_height, r=g_presser_size, >>> rounding1=-g_lid_rounding); >>> } >>> // Cut away the inside of the presser handle ring. It will also >>> cut into the top of the stem a bit, hence why >>> // it's here. >>> up(g_wall_thickness + g_presser_height * 1.5) >>> ycyl(l = g_presser_width + ZFE_2, d=g_presser_size * 3, >>> rounding = -g_corner_rounding); >>> } >>> //up(g_wall_thickness) >>> for (r = [45 : 90 : 360]) { >>> zrot(r) up(g_wall_thickness) >>> wedge([g_presser_size, g_presser_size * 5, g_presser_size * >>> 2], anchor=CENTER+BOTTOM+FRONT); >>> } >>> } >>> >>> ring(); >>> right(150) presser(); >>> _______________________________________________ >>> OpenSCAD mailing list >>> To unsubscribe send an email to discuss-leave@lists.openscad.org >>> >>

 difference() {
     union() {
         // The outer cylinder that will make the presser handle ring
         up(g_wall_thickness + g_presser_height * 1.5)
             ycyl(l = g_presser_width, d=g_presser_size * 4,

posted a video on this https://youtu.be/_Mx4bCU7OPw On Sun, 25 Aug 2024 at 00:06, Sanjeev Prabhakar <sprabhakar2006@gmail.com> wrote: > code is below: > > # first need to import the library openscad1.py to create objects > # https://github.com/sprabhakar2006/openSCAD/blob/main/openscad1.py > # also need to download library dependencies2.scad > # https://github.com/sprabhakar2006/openSCAD/blob/main/dependencies2.scad > > from openscad1 import * > > # create center pillar > c1=circle(10) # circlular section > > # p1 is path to create an object, it is similar to the rounding library in > openscad > p1=corner_radius(pts1([[100,0],[-100,0,5],[0,70,3],[-3,0]]),30) > sol1=prism(c1,p1) # prism is a function which offsets the section c1 in > > # create another surface for supports > > l1=corner_radius(pts1([[-2.5,0],[0,50,2],[5,0,2],[0,-50]]),10) > l1=equidistant_path(l1,500) > l1=q_rot(['x90','z45'],l1) > v1=q_rot(['y45','z-45'],[100,0,0]) > s1=surface_line_vector(l1,v1) > > > l1=ip_surf2sol(sol1,s1) # first intersection points > l2=ip_surf2sol(sol1,s1,n=-1) > l1=l1+flip(l2) > l2=o_3d(l1,sol1,-3) > > sol2=prism(c1,path_offset(p1,3)) > l3=ip_surf2sol(sol2,s1) # first intersection points > l4=ip_surf2sol(sol2,s1,n=-1) > l3=l3+flip(l4) > l3=path2path1(l1,l3) # function to make both lines points same > # now make a fillet with these 3 lines > fillet1=convert_3lines2fillet_closed(l2,l3,l1) > > > sol3=translate([0,0,-5],linear_extrude(corner_radius(pts1([[-50,-50,5],[100,0,5],[0,100,5],[-100,0,5]]),10),5)) > > with open('trial.scad','w+') as f: > f.write(f''' > include<dependencies2.scad> > > for(i=[0,90,180,270]) > rotate([0,0,i]){{ > hull() > color("blue")p_line3dc({l1},.01,1); > {swp(sol1[1:])} > {swp_c(fillet1)} > }} > {swp(sol3)} > ''') > > [image: Screenshot 2024-08-25 at 12.05.55 AM.png] > > On Sat, 24 Aug 2024 at 21:08, Roel Vanhout <roel.vanhout@gmail.com> wrote: > >> This is amazing, would you mind sharing the code that created this? I >> write Python every day and I'm much more comfortable with it than with >> straight OpenSCAD, but I always thought that using Python to generate >> OpenSCAD code was mostly syntactic sugar like having 'real' for loops with >> updating variables and such, I didn't know (and still don't quite see how >> tbh) that it also allowed for such complex shapes. >> >> cheers >> >> >> On Sat, Aug 24, 2024 at 5:49 AM Sanjeev Prabhakar < >> sprabhakar2006@gmail.com> wrote: >> >>> I gave it a try >>> [image: Screenshot 2024-08-24 at 9.16.07 AM.png] >>> >>> On Fri, 23 Aug 2024 at 16:19, Roel Vanhout via Discuss < >>> discuss@lists.openscad.org> wrote: >>> >>>> Hello all, >>>> >>>> I have a complex shape to round for which I'd like to ask if anyone has >>>> suggestions on how to approach this. I've always found rounding and >>>> chamfering to be very tedious using plain OpenSCAD until I found how to do >>>> it with BOSL2, which has been a godsend for the cases I've encountered so >>>> far. But today I have the shape in the picture below, for which the code is >>>> at the bottom. I'm looking to round out all surfaces of the 'fins' that >>>> radiate out from the center 'stem' come in contact with other surfaces. >>>> (this is a presser tool for stuffing food into a mold, the 'fins' are to >>>> distribute the pressure that is manually exerted on the ring to the bottom >>>> platelet). >>>> >>>> I've marked the various lines that need to be rounded out in different >>>> colors. Out of these, the turquoise one I could do with a BOSL2 >>>> rounding_edge_mask(), and the green one too if I use an appropriate 'ang' >>>> parameter (which I can calculate fairly easily). However I have no idea how >>>> to do the red one or the orange one, nor how to let e.g. the orange one >>>> blend smoothly into the green one for example; and the same for all the >>>> other places where roundovers meet. >>>> >>>> Any ideas on how I can do this? Thank you. >>>> >>>> regards >>>> >>>> Roel >>>> >>>> >>>> [image: presser_foot_rounding.png] >>>> >>>> >>>> >>>> >>>> >>>> >>>> include <BOSL2-master/std.scad> >>>> include <BOSL2-master/screws.scad> >>>> include <BOSL2-master/threading.scad> >>>> >>>> ZFE = 0.01; // Z fighting epsilon, a constant to prevent planes from >>>> overlapping. >>>> // It has a separate name so that you know where it's >>>> used what it's for. >>>> ZFE_2 = ZFE * 2; >>>> ZFE_3 = ZFE * 3; >>>> $fn = $preview ? 64 : 128; >>>> >>>> // Global >>>> g_corner_rounding = 2; >>>> >>>> // Ring >>>> g_wall_thickness = 3; >>>> g_inside_size = 90; >>>> g_height = 70; >>>> >>>> // Lid >>>> g_lid_play = 1; >>>> g_presser_height = 30; >>>> g_presser_width = 20; >>>> g_lid_rounding = 5; >>>> g_presser_size = 10; >>>> >>>> module ring() { >>>> outside_size = g_inside_size + (2 * g_wall_thickness); >>>> //cuboid([g_wall_thickness, depth, clip_height], chamfer=1, >>>> edges="X", anchor=LEFT+BOTTOM+FRONT); >>>> difference() { >>>> cuboid([outside_size, outside_size, g_height], >>>> rounding=g_corner_rounding, edges="Z"); >>>> cuboid([g_inside_size, g_inside_size, g_height + ZFE_2], >>>> rounding=g_corner_rounding, edges="Z"); >>>> } >>>> } >>>> >>>> module presser() { >>>> cuboid([g_inside_size - g_lid_play, g_inside_size - g_lid_play, >>>> g_wall_thickness * 2], rounding=g_corner_rounding, edges="Z"); >>>> >>>> difference() { >>>> union() { >>>> // The outer cylinder that will make the presser handle ring >>>> up(g_wall_thickness + g_presser_height * 1.5) >>>> ycyl(l = g_presser_width, d=g_presser_size * 4, >>>> rounding = g_corner_rounding); >>>> // The 'stem' of the presser handle >>>> up(g_wall_thickness + g_presser_height / 2) >>>> zcyl(l = g_presser_height, r=g_presser_size, >>>> rounding1=-g_lid_rounding); >>>> } >>>> // Cut away the inside of the presser handle ring. It will also >>>> cut into the top of the stem a bit, hence why >>>> // it's here. >>>> up(g_wall_thickness + g_presser_height * 1.5) >>>> ycyl(l = g_presser_width + ZFE_2, d=g_presser_size * 3, >>>> rounding = -g_corner_rounding); >>>> } >>>> //up(g_wall_thickness) >>>> for (r = [45 : 90 : 360]) { >>>> zrot(r) up(g_wall_thickness) >>>> wedge([g_presser_size, g_presser_size * 5, g_presser_size * >>>> 2], anchor=CENTER+BOTTOM+FRONT); >>>> } >>>> } >>>> >>>> ring(); >>>> right(150) presser(); >>>> _______________________________________________ >>>> OpenSCAD mailing list >>>> To unsubscribe send an email to discuss-leave@lists.openscad.org >>>> >>>