Empathy List Archives

L

larry

Fri, Dec 27, 2024 5:18 PM

I am trying to reproduce a part for a relative.
It will be a box with one rounded corner.
I started off using cuboid(), because I did not see a way to use rect()
or square() to round one corner.

With this code, if I use F5, the bottom and top of the inner part of
the box show up, with the top coloured by the '#'. If I remove the '#'
it does not show up, and in both cases, F6 produced only the bottom (or
perhaps it's the bottom).

Can I not move a projection vertically?

//----------
include <BOSL2/std.scad>
$fn= $preview ? 60 : 180;

hull() {
inner_bottom();
#up(52.5) inner_top();
}
module inner_bottom() {
projection()
cuboid([146,40,1],rounding=8,edges=[FWD+RIGHT]);
}

module inner_top() {
projection() {
cuboid([148,46,1],rounding=8,edges=[FWD+RIGHT]);
}
}
//----------

I am trying to reproduce a part for a relative. It will be a box with one rounded corner. I started off using cuboid(), because I did not see a way to use rect() or square() to round one corner. With this code, if I use F5, the bottom and top of the inner part of the box show up, with the top coloured by the '#'. If I remove the '#' it does not show up, and in both cases, F6 produced only the bottom (or perhaps it's the bottom). Can I not move a projection vertically? //---------- include <BOSL2/std.scad> $fn= $preview ? 60 : 180; hull() { inner_bottom(); #up(52.5) inner_top(); } module inner_bottom() { projection() cuboid([146,40,1],rounding=8,edges=[FWD+RIGHT]); } module inner_top() { projection() { cuboid([148,46,1],rounding=8,edges=[FWD+RIGHT]); } } //----------

AM

Adrian Mariano

Fri, Dec 27, 2024 5:32 PM

Larry, I think projections are 2d so you can't hull them in 3d. Maybe if
you linear extrude them first?

But it may be that the right way to do what you want is:

prismoid([148,45],[146,40],52.5, rounding=[8,0,0,0]);

And also note that rect() can round corners individually. But you'll still
have issues with hulling 2d objects to make something 3d.

On Fri, Dec 27, 2024 at 12:18 PM larry via Discuss <
discuss@lists.openscad.org> wrote:

I am trying to reproduce a part for a relative.
It will be a box with one rounded corner.
I started off using cuboid(), because I did not see a way to use rect()
or square() to round one corner.

With this code, if I use F5, the bottom and top of the inner part of
the box show up, with the top coloured by the '#'. If I remove the '#'
it does not show up, and in both cases, F6 produced only the bottom (or
perhaps it's the bottom).

Can I not move a projection vertically?

//----------
include <BOSL2/std.scad>
$fn= $preview ? 60 : 180;

hull() {
inner_bottom();
#up(52.5) inner_top();
}
module inner_bottom() {
projection()
cuboid([146,40,1],rounding=8,edges=[FWD+RIGHT]);
}

module inner_top() {
projection() {
cuboid([148,46,1],rounding=8,edges=[FWD+RIGHT]);
}
}
//----------

OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org

Larry, I think projections are 2d so you can't hull them in 3d. Maybe if you linear extrude them first? But it may be that the right way to do what you want is: prismoid([148,45],[146,40],52.5, rounding=[8,0,0,0]); And also note that rect() can round corners individually. But you'll still have issues with hulling 2d objects to make something 3d. On Fri, Dec 27, 2024 at 12:18 PM larry via Discuss < discuss@lists.openscad.org> wrote: > I am trying to reproduce a part for a relative. > It will be a box with one rounded corner. > I started off using cuboid(), because I did not see a way to use rect() > or square() to round one corner. > > With this code, if I use F5, the bottom and top of the inner part of > the box show up, with the top coloured by the '#'. If I remove the '#' > it does not show up, and in both cases, F6 produced only the bottom (or > perhaps it's the bottom). > > Can I not move a projection vertically? > > //---------- > include <BOSL2/std.scad> > $fn= $preview ? 60 : 180; > > hull() { > inner_bottom(); > #up(52.5) inner_top(); > } > module inner_bottom() { > projection() > cuboid([146,40,1],rounding=8,edges=[FWD+RIGHT]); > } > > module inner_top() { > projection() { > cuboid([148,46,1],rounding=8,edges=[FWD+RIGHT]); > } > } > //---------- > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >

RW

Raymond West

Fri, Dec 27, 2024 7:10 PM

I used to round edges by differencing from an extruded cruciform shaped
module.

Maybe this will help. If it is a corner you want, then the same sort of
thing - difference a cube with spheres subtracted.

module rounder(r=5){
   linear_extrude(1000){ // make plenty long enough
     d=2*r;
    difference(){
     square(d,true);
     translate ([r,r]) circle(d=d);
     translate ([-r,r])circle(d=d);
     translate ([-r,-r])circle(d=d);
     translate ([r,-r])circle(d=d);
    }
}
}

// how to use

difference(){
cube (100);
translate ([100,0,-10])
   rounder(12);
      translate ([0,100,-10])
        rounder (15);
          translate([100,-10,100])
           rotate([-90,0,0])
             #rounder(10);
}

On 27/12/2024 17:18, larry via Discuss wrote:

I am trying to reproduce a part for a relative.
It will be a box with one rounded corner.
I started off using cuboid(), because I did not see a way to use rect()
or square() to round one corner.

With this code, if I use F5, the bottom and top of the inner part of
the box show up, with the top coloured by the '#'. If I remove the '#'
it does not show up, and in both cases, F6 produced only the bottom (or
perhaps it's the bottom).

Can I not move a projection vertically?

//----------
include <BOSL2/std.scad>
$fn= $preview ? 60 : 180;

hull() {
inner_bottom();
#up(52.5) inner_top();
}
module inner_bottom() {
projection()
cuboid([146,40,1],rounding=8,edges=[FWD+RIGHT]);
}

module inner_top() {
projection() {
cuboid([148,46,1],rounding=8,edges=[FWD+RIGHT]);
}
}
//----------

OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org

I used to round edges by differencing from an extruded cruciform shaped module. Maybe this will help. If it is a corner you want, then the same sort of thing - difference a cube with spheres subtracted. module rounder(r=5){ linear_extrude(1000){ // make plenty long enough d=2*r; difference(){ square(d,true); translate ([r,r]) circle(d=d); translate ([-r,r])circle(d=d); translate ([-r,-r])circle(d=d); translate ([r,-r])circle(d=d); } } } // how to use difference(){ cube (100); translate ([100,0,-10]) rounder(12); translate ([0,100,-10]) rounder (15); translate([100,-10,100]) rotate([-90,0,0]) #rounder(10); } On 27/12/2024 17:18, larry via Discuss wrote: > I am trying to reproduce a part for a relative. > It will be a box with one rounded corner. > I started off using cuboid(), because I did not see a way to use rect() > or square() to round one corner. > > With this code, if I use F5, the bottom and top of the inner part of > the box show up, with the top coloured by the '#'. If I remove the '#' > it does not show up, and in both cases, F6 produced only the bottom (or > perhaps it's the bottom). > > Can I not move a projection vertically? > > //---------- > include <BOSL2/std.scad> > $fn= $preview ? 60 : 180; > > hull() { > inner_bottom(); > #up(52.5) inner_top(); > } > module inner_bottom() { > projection() > cuboid([146,40,1],rounding=8,edges=[FWD+RIGHT]); > } > > module inner_top() { > projection() { > cuboid([148,46,1],rounding=8,edges=[FWD+RIGHT]); > } > } > //---------- > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org

L

larry

Fri, Dec 27, 2024 7:43 PM

On Fri, 2024-12-27 at 12:32 -0500, Adrian Mariano via Discuss wrote:

Larry, I think projections are 2d so you can't hull them in 3d.
Maybe if you linear extrude them first?

Thanks, I hadn't thought of that. I was sure I had made 3D out of the
hull of 2 2D figures.

But it may be that the right way to do what you want is:
prismoid([148,45],[146,40],52.5, rounding=[8,0,0,0]);

I didn't try that because the top of the box has to be offset from the
bottom by an amount I have yet to calculate.

And also note that rect() can round corners individually. But you'll
still have issues with hulling 2d objects to make something 3d.

The reason I wanted to use hull() is because I wanted to use offset()
to round the outer corners of the square inner corners.

Here's what I tried first. It works, but I can't round the outer square
corners with offset. I do see how I could do it, using projection, but
I thought I could do it all with 2d to 3d.

//---------

include <BOSL2/std.scad>
$fn= $preview ? 60 : 180;

difference(){
#outside();
up(2) inside();
}

module inside() {
hull() {
up(0.5) cuboid([146,40,1],rounding=8,edges=[FWD+RIGHT]);
up(52.5) cuboid([148,46,1],rounding=8,edges=[FWD+RIGHT]);
}
}

module outside() {
hull() {
up(0.5) cuboid([150,44,1],rounding=10,edges=[FWD+RIGHT]);
up(52.5) cuboid([154,50,1],rounding=10,edges=[FWD+RIGHT]);
}
}

//---------

On Fri, Dec 27, 2024 at 12:18 PM larry via Discuss
discuss@lists.openscad.org wrote:

I am trying to reproduce a part for a relative.
It will be a box with one rounded corner.
I started off using cuboid(), because I did not see a way to use
rect()
or square() to round one corner.

With this code, if I use F5, the bottom and top of the inner part
of
the box show up, with the top coloured by the '#'. If I remove the
'#'
it does not show up, and in both cases, F6 produced only the bottom
(or
perhaps it's the bottom).

Can I not move a projection vertically?

//----------
include <BOSL2/std.scad>
$fn= $preview ? 60 : 180;

hull() {
inner_bottom();
#up(52.5) inner_top();
}
module inner_bottom() {
projection()
cuboid([146,40,1],rounding=8,edges=[FWD+RIGHT]);
}

module inner_top() {
projection() {
cuboid([148,46,1],rounding=8,edges=[FWD+RIGHT]);
}
}
//----------

OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org

On Fri, 2024-12-27 at 12:32 -0500, Adrian Mariano via Discuss wrote: > Larry, I think projections are 2d so you can't hull them in 3d. > Maybe if you linear extrude them first? Thanks, I hadn't thought of that. I was sure I had made 3D out of the hull of 2 2D figures. > But it may be that the right way to do what you want is: > prismoid([148,45],[146,40],52.5, rounding=[8,0,0,0]); I didn't try that because the top of the box has to be offset from the bottom by an amount I have yet to calculate. > And also note that rect() can round corners individually. But you'll > still have issues with hulling 2d objects to make something 3d. The reason I wanted to use hull() is because I wanted to use offset() to round the outer corners of the square inner corners. Here's what I tried first. It works, but I can't round the outer square corners with offset. I do see how I could do it, using projection, but I thought I could do it all with 2d to 3d. //--------- include <BOSL2/std.scad> $fn= $preview ? 60 : 180; difference(){ #outside(); up(2) inside(); } module inside() { hull() { up(0.5) cuboid([146,40,1],rounding=8,edges=[FWD+RIGHT]); up(52.5) cuboid([148,46,1],rounding=8,edges=[FWD+RIGHT]); } } module outside() { hull() { up(0.5) cuboid([150,44,1],rounding=10,edges=[FWD+RIGHT]); up(52.5) cuboid([154,50,1],rounding=10,edges=[FWD+RIGHT]); } } //--------- > On Fri, Dec 27, 2024 at 12:18 PM larry via Discuss > <discuss@lists.openscad.org> wrote: > > I am trying to reproduce a part for a relative. > > It will be a box with one rounded corner. > > I started off using cuboid(), because I did not see a way to use > > rect() > > or square() to round one corner. > > > > With this code, if I use F5, the bottom and top of the inner part > > of > > the box show up, with the top coloured by the '#'. If I remove the > > '#' > > it does not show up, and in both cases, F6 produced only the bottom > > (or > > perhaps it's the bottom). > > > > Can I not move a projection vertically? > > > > //---------- > > include <BOSL2/std.scad> > > $fn= $preview ? 60 : 180; > > > > hull() { > > inner_bottom(); > > #up(52.5) inner_top(); > > } > > module inner_bottom() { > > projection() > > cuboid([146,40,1],rounding=8,edges=[FWD+RIGHT]); > > } > > > > module inner_top() { > > projection() { > > cuboid([148,46,1],rounding=8,edges=[FWD+RIGHT]); > > } > > } > > //---------- > > _______________________________________________ > > 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

AM

Adrian Mariano

Fri, Dec 27, 2024 7:57 PM

I didn't try that because the top of the box has to be offset from the

bottom by an amount I have yet to calculate.

You mean like this?

prismoid([148,45],[146,40],52.5, shift=[4,0], rounding=[8,0,0,0]);

I don't understand what the other rounding you need is. If you need a
prismoid with side edges and top edges rounded you can make that with
rounded_prism().

On Fri, Dec 27, 2024 at 2:44 PM larry via Discuss <
discuss@lists.openscad.org> wrote: