Empathy List Archives

J

jon

Mon, Feb 26, 2024 1:20 PM

If you do an F5 on this, and look at it from above and below, sometimes
you see a half-bagel that is above the XY plane, and sometimes one below
the XY plane. Confusing. Is there any way to make it always show the
correct geometry?

Jon

// Sink Drain Food Catcher

bd = 80.7;        // big diameter
br = bd/2;
sd = 47;        // small diameter
ht = 44;        // height

module Torus(of, ra)
   rotate_extrude(convexity = 10, $fn = 100)
        translate([ra + of, 0, 0])
            circle(r = ra, $fn = 100);

module CutTorus(of, ra)
   difference() {
        Torus(of, ra);
        translate([-500, -500, 0])
            cube(1000);
        }

cube([br + 55, 1, 1]);
cube([1, 1, ht]);

CutTorus(0, 44);

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If you do an F5 on this, and look at it from above and below, sometimes you see a half-bagel that is above the XY plane, and sometimes one below the XY plane. Confusing. Is there any way to make it always show the correct geometry? Jon // Sink Drain Food Catcher bd = 80.7; // big diameter br = bd/2; sd = 47; // small diameter ht = 44; // height module Torus(of, ra) rotate_extrude(convexity = 10, $fn = 100) translate([ra + of, 0, 0]) circle(r = ra, $fn = 100); module CutTorus(of, ra) difference() { Torus(of, ra); translate([-500, -500, 0]) cube(1000); } cube([br + 55, 1, 1]); cube([1, 1, ht]); CutTorus(0, 44); -- This email has been checked for viruses by AVG antivirus software. www.avg.com

NH

nop head

Mon, Feb 26, 2024 1:27 PM

Make the cube smaller, zoom out further or use orthogonal mode.

The cube gets clipped by the front clipping plane and that breaks OpeCSG.

On Mon, 26 Feb 2024 at 13:21, jon via Discuss discuss@lists.openscad.org
wrote:

If you do an F5 on this, and look at it from above and below, sometimes
you see a half-bagel that is above the XY plane, and sometimes one below
the XY plane. Confusing. Is there any way to make it always show the
correct geometry?

Jon

// Sink Drain Food Catcher

bd = 80.7; // big diameter
br = bd/2;
sd = 47; // small diameter
ht = 44; // height

module Torus(of, ra)
rotate_extrude(convexity = 10, $fn = 100)
translate([ra + of, 0, 0])
circle(r = ra, $fn = 100);

module CutTorus(of, ra)
difference() {
Torus(of, ra);
translate([-500, -500, 0])
cube(1000);
}

cube([br + 55, 1, 1]);
cube([1, 1, ht]);

CutTorus(0, 44);

--
This email has been checked for viruses by AVG antivirus software.
www.avg.com

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Make the cube smaller, zoom out further or use orthogonal mode. The cube gets clipped by the front clipping plane and that breaks OpeCSG. On Mon, 26 Feb 2024 at 13:21, jon via Discuss <discuss@lists.openscad.org> wrote: > If you do an F5 on this, and look at it from above and below, sometimes > you see a half-bagel that is above the XY plane, and sometimes one below > the XY plane. Confusing. Is there any way to make it always show the > correct geometry? > > Jon > > > // Sink Drain Food Catcher > > bd = 80.7; // big diameter > br = bd/2; > sd = 47; // small diameter > ht = 44; // height > > module Torus(of, ra) > rotate_extrude(convexity = 10, $fn = 100) > translate([ra + of, 0, 0]) > circle(r = ra, $fn = 100); > > module CutTorus(of, ra) > difference() { > Torus(of, ra); > translate([-500, -500, 0]) > cube(1000); > } > > cube([br + 55, 1, 1]); > cube([1, 1, ht]); > > CutTorus(0, 44); > > > -- > This email has been checked for viruses by AVG antivirus software. > www.avg.com > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >

JB

Jordan Brown

Mon, Feb 26, 2024 6:04 PM

I’m on my iPad at the moment so can’t run your program, but this sounds like https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/FAQ#Why_does_difference_(or_intersection)_sometimes_not_work_in_preview? .

LM

Leonard Martin Struttmann

Mon, Feb 26, 2024 6:19 PM

Running OpenSCAD version 2024.01.23 (git 88d244aed) with manifold checked.
It appears to preview fine, with the half torus always below the XY plane.

On Mon, Feb 26, 2024 at 12:05 PM Jordan Brown via Discuss <
discuss@lists.openscad.org> wrote:

I’m on my iPad at the moment so can’t run your program, but this sounds
like
https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/FAQ#Why_does_difference_(or_intersection)_sometimes_not_work_in_preview?
.

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

Running OpenSCAD version 2024.01.23 (git 88d244aed) with manifold checked. It appears to preview fine, with the half torus always below the XY plane. On Mon, Feb 26, 2024 at 12:05 PM Jordan Brown via Discuss < discuss@lists.openscad.org> wrote: > I’m on my iPad at the moment so can’t run your program, but this sounds > like > https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/FAQ#Why_does_difference_(or_intersection)_sometimes_not_work_in_preview? > . > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >

RW

Raymond West

Mon, Feb 26, 2024 7:03 PM

previews fine, with or without manifold, but not f6

On 26/02/2024 18:19, Leonard Martin Struttmann via Discuss wrote:

Running OpenSCAD version 2024.01.23 (git 88d244aed) with manifold
checked. It appears to preview fine, with the half torus always below
the XY plane.

On Mon, Feb 26, 2024 at 12:05 PM Jordan Brown via Discuss
discuss@lists.openscad.org wrote:

 I’m on my iPad at the moment so can’t run your program, but this
 sounds like
 https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/FAQ#Why_does_difference_(or_intersection)_sometimes_not_work_in_preview? .
 _______________________________________________
 OpenSCAD mailing list
 To unsubscribe send an email to discuss-leave@lists.openscad.org

OpenSCAD mailing list
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previews fine, with or without manifold, but not f6 On 26/02/2024 18:19, Leonard Martin Struttmann via Discuss wrote: > Running OpenSCAD version 2024.01.23 (git 88d244aed) with manifold > checked. It appears to preview fine, with the half torus always below > the XY plane. > > On Mon, Feb 26, 2024 at 12:05 PM Jordan Brown via Discuss > <discuss@lists.openscad.org> wrote: > > I’m on my iPad at the moment so can’t run your program, but this > sounds like > https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/FAQ#Why_does_difference_(or_intersection)_sometimes_not_work_in_preview? . > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org > > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email todiscuss-leave@lists.openscad.org

discuss@lists.openscad.org

F5 optical illusion