method of creating surfaces with 2 sketches

Nice. Though I think that you need to add an operator function argument, because there's more than one way to combine those waves. You show what appears to be a multiplicative surface, but an additive surface is another valid interpretation, yet has a rather different result:  include <BOSL2/std.scad> function surface_from_2_waves(xwave, ywave, oper = function(x,y) x*y) = [ for(ypt = ywave) [ for(xpt = xwave) [xpt.x, ypt.y, oper(xpt.z,ypt.z)] ] ]; function surf_extrude(surfpts, height) = vnf_vertex_array( [for (row=surfpts) concat(row, down(height, p=reverse(row)))], caps=true, col_wrap=true, row_wrap=false ); xywave = [for (i = [0:2:100]) [i,2*sin(3*i*360/100)]]; xzwave = xrot(90, p=path3d(xywave)); yzwave = zrot(90, p=xzwave); surfpts = surface_from_2_waves(xzwave, yzwave, function(x,y) x+y); vnf = surf_extrude(surfpts, 0.1); vnf_polyhedron(vnf, convexity=10); -Revar > On Oct 27, 2023, at 11:31 PM, Sanjeev Prabhakar <sprabhakar2006@gmail.com> wrote: > > method of creating surfaces with 2 sketches > > > <creating_surfaces.pdf>_______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org

Thanks Will try this On Sun, 29 Oct, 2023, 2:11 am Revar Desmera, <revarbat@gmail.com> wrote: > Nice. Though I think that you need to add an operator function argument, > because there's more than one way to combine those waves. You show what > appears to be a multiplicative surface, but an additive surface is another > valid interpretation, yet has a rather different result: > > > [image: Screenshot 2023-10-28 at 1.38.51 PM.png] > > include <BOSL2/std.scad> > > function surface_from_2_waves(xwave, ywave, oper = function(x,y) x*y) = [ > for(ypt = ywave) [ > for(xpt = xwave) > [xpt.x, ypt.y, oper(xpt.z,ypt.z)] > ] > ]; > > function surf_extrude(surfpts, height) = > vnf_vertex_array( > [for (row=surfpts) concat(row, down(height, p=reverse(row)))], > caps=true, col_wrap=true, row_wrap=false > ); > > xywave = [for (i = [0:2:100]) [i,2*sin(3*i*360/100)]]; > xzwave = xrot(90, p=path3d(xywave)); > yzwave = zrot(90, p=xzwave); > surfpts = surface_from_2_waves(xzwave, yzwave, function(x,y) x+y); > vnf = surf_extrude(surfpts, 0.1); > vnf_polyhedron(vnf, convexity=10); > > > > -Revar > > > On Oct 27, 2023, at 11:31 PM, Sanjeev Prabhakar <sprabhakar2006@gmail.com> > wrote: > > method of creating surfaces with 2 sketches > > > <creating_surfaces.pdf>_______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org > > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >

You can get interesting effects using `min()` or `max()` on combinations of sine and triangle wave inputs.  - Revar > On Oct 28, 2023, at 6:19 PM, Sanjeev Prabhakar <sprabhakar2006@gmail.com> wrote: > > Thanks > Will try this > > On Sun, 29 Oct, 2023, 2:11 am Revar Desmera, <revarbat@gmail.com <mailto:revarbat@gmail.com>> wrote: >> Nice. Though I think that you need to add an operator function argument, because there's more than one way to combine those waves. You show what appears to be a multiplicative surface, but an additive surface is another valid interpretation, yet has a rather different result: >> >> >> >> >> include <BOSL2/std.scad> >> >> function surface_from_2_waves(xwave, ywave, oper = function(x,y) x*y) = [ >> for(ypt = ywave) [ >> for(xpt = xwave) >> [xpt.x, ypt.y, oper(xpt.z,ypt.z)] >> ] >> ]; >> >> function surf_extrude(surfpts, height) = >> vnf_vertex_array( >> [for (row=surfpts) concat(row, down(height, p=reverse(row)))], >> caps=true, col_wrap=true, row_wrap=false >> ); >> >> xywave = [for (i = [0:2:100]) [i,2*sin(3*i*360/100)]]; >> xzwave = xrot(90, p=path3d(xywave)); >> yzwave = zrot(90, p=xzwave); >> surfpts = surface_from_2_waves(xzwave, yzwave, function(x,y) x+y); >> vnf = surf_extrude(surfpts, 0.1); >> vnf_polyhedron(vnf, convexity=10); >> >> >> >> -Revar >> >> >>> On Oct 27, 2023, at 11:31 PM, Sanjeev Prabhakar <sprabhakar2006@gmail.com <mailto:sprabhakar2006@gmail.com>> wrote: >>> >>> method of creating surfaces with 2 sketches >>> >>> >>> <creating_surfaces.pdf>_______________________________________________ >>> OpenSCAD mailing list >>> To unsubscribe send an email to discuss-leave@lists.openscad.org <mailto:discuss-leave@lists.openscad.org> >> >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email to discuss-leave@lists.openscad.org <mailto:discuss-leave@lists.openscad.org> > <Screenshot 2023-10-28 at 1.38.51 PM.png><Screenshot 2023-10-28 at 1.38.51 PM.png>_______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org

very nice. other interesting shapes [image: Screenshot 2023-10-29 at 3.21.18 PM.png] On Sun, 29 Oct 2023 at 11:08, Revar Desmera <revarbat@gmail.com> wrote: > You can get interesting effects using `min()` or `max()` on combinations > of sine and triangle wave inputs. > > [image: Screenshot 2023-10-28 at 10.37.21 PM.png] > > - Revar > > > > On Oct 28, 2023, at 6:19 PM, Sanjeev Prabhakar <sprabhakar2006@gmail.com> > wrote: > > Thanks > Will try this > > On Sun, 29 Oct, 2023, 2:11 am Revar Desmera, <revarbat@gmail.com> wrote: > >> Nice. Though I think that you need to add an operator function argument, >> because there's more than one way to combine those waves. You show what >> appears to be a multiplicative surface, but an additive surface is another >> valid interpretation, yet has a rather different result: >> >> >> [image: Screenshot 2023-10-28 at 1.38.51 PM.png] >> >> include <BOSL2/std.scad> >> >> function surface_from_2_waves(xwave, ywave, oper = function(x,y) x*y) = [ >> for(ypt = ywave) [ >> for(xpt = xwave) >> [xpt.x, ypt.y, oper(xpt.z,ypt.z)] >> ] >> ]; >> >> function surf_extrude(surfpts, height) = >> vnf_vertex_array( >> [for (row=surfpts) concat(row, down(height, p=reverse(row)))], >> caps=true, col_wrap=true, row_wrap=false >> ); >> >> xywave = [for (i = [0:2:100]) [i,2*sin(3*i*360/100)]]; >> xzwave = xrot(90, p=path3d(xywave)); >> yzwave = zrot(90, p=xzwave); >> surfpts = surface_from_2_waves(xzwave, yzwave, function(x,y) x+y); >> vnf = surf_extrude(surfpts, 0.1); >> vnf_polyhedron(vnf, convexity=10); >> >> >> >> -Revar >> >> >> On Oct 27, 2023, at 11:31 PM, Sanjeev Prabhakar <sprabhakar2006@gmail.com> >> wrote: >> >> method of creating surfaces with 2 sketches >> >> >> <creating_surfaces.pdf>_______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email to discuss-leave@lists.openscad.org >> >> >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email to discuss-leave@lists.openscad.org >> > <Screenshot 2023-10-28 at 1.38.51 PM.png><Screenshot 2023-10-28 at > 1.38.51 PM.png>_______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org > > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >

another one [image: Screenshot 2023-10-29 at 3.44.57 PM.png]

Square waves multiplied together get a checkerboard, but add them instead and you get this: - Revar

Good learning I could reproduce the same [image: Screenshot 2023-10-30 at 7.57.42 PM.png]

Found a fun one! You can do a quilted looking surface by getting the `norm()` of two sine waves: - Revar > On Oct 30, 2023, at 7:29 AM, Sanjeev Prabhakar <sprabhakar2006@gmail.com> wrote: > > Good learning > I could reproduce the same > > <Screenshot 2023-10-30 at 7.57.42 PM.png> > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org

 It would be great to have a library of these shapes.  I'm sure they will come in handy from time to time. On 10/30/2023 4:59 PM, Revar Desmera wrote: > Found a fun one!  You can do a quilted looking surface by getting the > `norm()` of two sine waves: > > > > - Revar