Hello, self taught openSCAD newbie here, I was wondering if there is a way to create a pyramid/cone with a non-circular base, more precisely with the shape of
hull(){ cylinder(h=2,d=13); translate([-20,0,0]){ cylinder(h=2,d=13); } } so you know how you can do cylinder(r1=40,r2=1,h=20); to make a cone with a base radius of 10 and a height of 15. however, this makes a cone with a circular base, but I need the base to be this shape: hull(){ cylinder(h=2,d=13); translate([-20,0,0]){ cylinder(h=2,d=13); } } sorry, I can't really think of a better way to word it, so I hope that you guys can understand what i'm trying to say. Any help would be MUCH appreciated, thanks! |
what about two examples? $fn = 60; translate([20,0,0]) scale([1.0,.75,1.0]) cylinder(r1=10,r2=.1,h=20); hull() { cylinder(h=2,d=13); translate([-20,0,0]) cylinder(h=2,d=13); translate([-10,0,10]) cylinder(h=2,d=.1); } -- Extra Ham Operator: K7AZJ Registered Linux User: 275424 Raspberry Pi and Openscad developer The most exciting phrase to hear in science - the one that heralds new discoveries - is not "Eureka!" but "That's funny...". _______________________________________________ OpenSCAD mailing list [hidden email] http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org |
In reply to this post by AllTheUsernamesAreTaken
Try hulling a thin extrusion with a tiny sphere at (0,0, height).
Away from pc so I can't test it but this should work. hull() { linear_extrude(0.1) hull() { translate ([20,0,0]) circle (r=5); translate ([-20,0,0]) circle (r=5); } translate ([0,0,20]) sphere(d=0.01); } Sent from my iPhone > On May 30, 2017, at 6:23 PM, AllTheGoodUsernamesAreTaken <[hidden email]> wrote: > > Hello, self taught openSCAD newbie here, I was wondering if there is a way to > create a pyramid/cone with a non-circular base, more precisely with the > shape of > hull(){ > cylinder(h=2,d=13); > translate([-20,0,0]){ > cylinder(h=2,d=13); > } > } > > so you know how you can do cylinder(r1=40,r2=1,h=20); to make a cone with a > base radius of 10 and a height of 15. however, this makes a cone with a > circular base, but I need the base to be this shape: > hull(){ > cylinder(h=2,d=13); > translate([-20,0,0]){ > cylinder(h=2,d=13); > } > } > sorry, I can't really think of a better way to word it, so I hope that you > guys can understand what i'm trying to say. Any help would be MUCH > appreciated, thanks! > > > > -- > View this message in context: http://forum.openscad.org/non-circular-cylinder-tp21603.html > Sent from the OpenSCAD mailing list archive at Nabble.com. > > _______________________________________________ > OpenSCAD mailing list > [hidden email] > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org _______________________________________________ OpenSCAD mailing list [hidden email] http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org |
In reply to this post by AllTheUsernamesAreTaken
or perhaps even...
hull() { cylinder(r1 = 10, r2 = 1, h = 15); translate([-20,0,0]) cylinder(r1 = 10, r2 = 1, h = 15); } |
If your base shape may be described by a 2D shape, you may use linear_extrude with scale parameter: linear_extrude(h=20,scale=0)hull(){ circle(d=13); translate([-20,0,0]) circle(d=13); } Note the cone apex is on the z axis, so if you want it to project on the center of the base, change to: linear_extrude(h=20,scale=0) hull(){ translate([-10,0,0]) circle(d=13); translate([ 10,0,0]) circle(d=13); } _______________________________________________ OpenSCAD mailing list [hidden email] http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org |
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