C
Cole
Thu, Oct 13, 2016 5:11 PM
i have a polyhedron on openscad and i want to 3D print it but it is not
coming up as a solid.
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i have a polyhedron on openscad and i want to 3D print it but it is not
coming up as a solid.
--
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J
jon
Thu, Oct 13, 2016 5:15 PM
Where is it not "coming up as a solid"? Do you have an STL which you
can share with us? Do you have source code that you can share with us?
Jon
On 10/13/2016 1:11 PM, Cole wrote:
i have a polyhedron on openscad and i want to 3D print it but it is not
coming up as a solid.
Where is it not "coming up as a solid"? Do you have an STL which you
can share with us? Do you have source code that you can share with us?
Jon
On 10/13/2016 1:11 PM, Cole wrote:
> i have a polyhedron on openscad and i want to 3D print it but it is not
> coming up as a solid.
>
CH
Cole Herbert
Thu, Oct 13, 2016 5:20 PM
polyhedron(
points=[
[0,0,0], //0
[5,0,0], //1
[5,100,0], //2
[0,100,0], //3
[0,0,10], //4
[5,0,10], //5
[5,100,10], //6
[0,100,10], //7
[2.5,100,20],//8
[2.5,0,20],//9
[2.5,120,0],//10
[0,0,0]],//11
faces = [
[0,1,2,3], //bottom
[0,3,7,4], //left
[1,2,6,5], //right
[1,0,4,5], //front
[3,2,6,7], //back
[4,7,8,9], //left blade
[5,9,8,6], //right blade
[4,9,5], // back 2
[7,8,6], //front 2
[3,10,7], //piont left
[7,8,10], //tip
[10,6,2],
[10,8,6]]
);
}
(it is only sowing up as a 2D sides instated of the 3D shape i wan to print
out or diffreance out of somthing.
On 13 October 2016 at 13:15, jon jon@jonbondy.com wrote:
Where is it not "coming up as a solid"? Do you have an STL which you can
share with us? Do you have source code that you can share with us?
Jon
On 10/13/2016 1:11 PM, Cole wrote:
i have a polyhedron on openscad and i want to 3D print it but it is not
coming up as a solid.
polyhedron(
points=[
[0,0,0], //0
[5,0,0], //1
[5,100,0], //2
[0,100,0], //3
[0,0,10], //4
[5,0,10], //5
[5,100,10], //6
[0,100,10], //7
[2.5,100,20],//8
[2.5,0,20],//9
[2.5,120,0],//10
[0,0,0]],//11
faces = [
[0,1,2,3], //bottom
[0,3,7,4], //left
[1,2,6,5], //right
[1,0,4,5], //front
[3,2,6,7], //back
[4,7,8,9], //left blade
[5,9,8,6], //right blade
[4,9,5], // back 2
[7,8,6], //front 2
[3,10,7], //piont left
[7,8,10], //tip
[10,6,2],
[10,8,6]]
);
}
(it is only sowing up as a 2D sides instated of the 3D shape i wan to print
out or diffreance out of somthing.
On 13 October 2016 at 13:15, jon <jon@jonbondy.com> wrote:
> Where is it not "coming up as a solid"? Do you have an STL which you can
> share with us? Do you have source code that you can share with us?
>
> Jon
>
> On 10/13/2016 1:11 PM, Cole wrote:
>
>> i have a polyhedron on openscad and i want to 3D print it but it is not
>> coming up as a solid.
>>
>>
>
> _______________________________________________
> OpenSCAD mailing list
> Discuss@lists.openscad.org
> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
>
J
jon
Thu, Oct 13, 2016 5:25 PM
It shows up as a 3D object in OpenSCAD after I remove the trailing "}"
Jon
On 10/13/2016 1:20 PM, Cole Herbert wrote:
polyhedron(
points=[
[0,0,0], //0
[5,0,0], //1
[5,100,0], //2
[0,100,0], //3
[0,0,10], //4
[5,0,10], //5
[5,100,10], //6
[0,100,10], //7
[2.5,100,20],//8
[2.5,0,20],//9
[2.5,120,0],//10
[0,0,0]],//11
faces = [
[0,1,2,3], //bottom
[0,3,7,4], //left
[1,2,6,5], //right
[1,0,4,5], //front
[3,2,6,7], //back
[4,7,8,9], //left blade
[5,9,8,6], //right blade
[4,9,5], // back 2
[7,8,6], //front 2
[3,10,7], //piont left
[7,8,10], //tip
[10,6,2],
[10,8,6]]
);
}
(it is only sowing up as a 2D sides instated of the 3D shape i wan to
print out or diffreance out of somthing.
It shows up as a 3D object in OpenSCAD after I remove the trailing "}"
Jon
On 10/13/2016 1:20 PM, Cole Herbert wrote:
> polyhedron(
> points=[
> [0,0,0], //0
> [5,0,0], //1
> [5,100,0], //2
> [0,100,0], //3
> [0,0,10], //4
> [5,0,10], //5
> [5,100,10], //6
> [0,100,10], //7
> [2.5,100,20],//8
> [2.5,0,20],//9
> [2.5,120,0],//10
> [0,0,0]],//11
>
>
> faces = [
> [0,1,2,3], //bottom
> [0,3,7,4], //left
> [1,2,6,5], //right
> [1,0,4,5], //front
> [3,2,6,7], //back
> [4,7,8,9], //left blade
> [5,9,8,6], //right blade
> [4,9,5], // back 2
> [7,8,6], //front 2
> [3,10,7], //piont left
> [7,8,10], //tip
> [10,6,2],
> [10,8,6]]
>
> );
> }
>
> (it is only sowing up as a 2D sides instated of the 3D shape i wan to
> print out or diffreance out of somthing.
>
CH
Cole Herbert
Thu, Oct 13, 2016 5:35 PM
i have it showing but when i go to export it is well not show up my cube
well show up but the polyhedron well not show.
On 13 October 2016 at 13:25, jon jon@jonbondy.com wrote:
It shows up as a 3D object in OpenSCAD after I remove the trailing "}"
Jon
On 10/13/2016 1:20 PM, Cole Herbert wrote:
polyhedron(
points=[
[0,0,0], //0
[5,0,0], //1
[5,100,0], //2
[0,100,0], //3
[0,0,10], //4
[5,0,10], //5
[5,100,10], //6
[0,100,10], //7
[2.5,100,20],//8
[2.5,0,20],//9
[2.5,120,0],//10
[0,0,0]],//11
faces = [
[0,1,2,3], //bottom
[0,3,7,4], //left
[1,2,6,5], //right
[1,0,4,5], //front
[3,2,6,7], //back
[4,7,8,9], //left blade
[5,9,8,6], //right blade
[4,9,5], // back 2
[7,8,6], //front 2
[3,10,7], //piont left
[7,8,10], //tip
[10,6,2],
[10,8,6]]
);
}
(it is only sowing up as a 2D sides instated of the 3D shape i wan to
print out or diffreance out of somthing.
i have it showing but when i go to export it is well not show up my cube
well show up but the polyhedron well not show.
On 13 October 2016 at 13:25, jon <jon@jonbondy.com> wrote:
> It shows up as a 3D object in OpenSCAD after I remove the trailing "}"
>
> Jon
>
>
> On 10/13/2016 1:20 PM, Cole Herbert wrote:
>
>> polyhedron(
>> points=[
>> [0,0,0], //0
>> [5,0,0], //1
>> [5,100,0], //2
>> [0,100,0], //3
>> [0,0,10], //4
>> [5,0,10], //5
>> [5,100,10], //6
>> [0,100,10], //7
>> [2.5,100,20],//8
>> [2.5,0,20],//9
>> [2.5,120,0],//10
>> [0,0,0]],//11
>>
>>
>> faces = [
>> [0,1,2,3], //bottom
>> [0,3,7,4], //left
>> [1,2,6,5], //right
>> [1,0,4,5], //front
>> [3,2,6,7], //back
>> [4,7,8,9], //left blade
>> [5,9,8,6], //right blade
>> [4,9,5], // back 2
>> [7,8,6], //front 2
>> [3,10,7], //piont left
>> [7,8,10], //tip
>> [10,6,2],
>> [10,8,6]]
>>
>> );
>> }
>>
>> (it is only sowing up as a 2D sides instated of the 3D shape i wan to
>> print out or diffreance out of somthing.
>>
>>
>
> _______________________________________________
> OpenSCAD mailing list
> Discuss@lists.openscad.org
> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
>
TP
Torsten Paul
Thu, Oct 13, 2016 5:39 PM
On 10/13/2016 07:35 PM, Cole Herbert wrote:
i have it showing but when i go to export it is well not show
up my cube well show up but the polyhedron well not show.
On 10/13/2016 07:35 PM, Cole Herbert wrote:
> i have it showing but when i go to export it is well not show
> up my cube well show up but the polyhedron well not show.
>
Some of the faces look into the wrong direction. Basically
reverse the point order of faces showing up in pink in
"Thrown Together" display mode.
See: https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/FAQ#Why_is_my_model_showing_up_with_F5_but_not_F6.3F
ciao,
Torsten.
F
fred_dot_u
Thu, Oct 13, 2016 7:56 PM
I'm not sure if you want the answers beyond the explanation provided, but for
my own exercise, I found them.
1, 2, 6, 5 > 1, 5, 6, 2
7, 8, 10 > 7, 10, 8
10, 6, 2 > 10, 2, 6
10, 8, 6 > 10, 6, 8
remove:
3, 2, 6, 7
7, 8, 6
add:
10, 3, 2
not being particularly proficient in OpenSCAD, I can't guess what the two
faces would do to your model, as they become internal "bulkheads" once you
close the non-manifold with 10, 3, 2, so it's probably a good idea to make
that change.
--
View this message in context: http://forum.openscad.org/polyhedron-to-a-3D-printing-from-tp18692p18699.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
I'm not sure if you want the answers beyond the explanation provided, but for
my own exercise, I found them.
1, 2, 6, 5 > 1, 5, 6, 2
7, 8, 10 > 7, 10, 8
10, 6, 2 > 10, 2, 6
10, 8, 6 > 10, 6, 8
remove:
3, 2, 6, 7
7, 8, 6
add:
10, 3, 2
not being particularly proficient in OpenSCAD, I can't guess what the two
faces would do to your model, as they become internal "bulkheads" once you
close the non-manifold with 10, 3, 2, so it's probably a good idea to make
that change.
--
View this message in context: http://forum.openscad.org/polyhedron-to-a-3D-printing-from-tp18692p18699.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
K
kitwallace
Mon, Apr 10, 2017 7:10 PM
Bit late to the scene on this one but its useful to be able to orient faces
when 'thrown-together' shows some faces are the wrong way round. This is
the code I use:
// ensure that all faces have a lhs orientation
function reverse(l) =
[for (i=[1:len(l)]) l[len(l)-i]];
function orthogonal(v0,v1,v2) = cross(v1-v0,v2-v1);
function normal(face) =
let (n=orthogonal(face[0],face[1],face[2]))
- n / norm(n);
function vsum(points,i=0) =
i < len(points)
? (points[i] + vsum(points,i+1))
: [0,0,0];
function centroid(points) =
vsum(points) / len(points);
function as_points(indexes,points) =
[for (i=[0:len(indexes)-1])
points[indexes[i]]
];
function cosine_between(u, v) =(u * v) / (norm(u) * norm(v));
function lhs_faces(faces,vertices) =
[for (face = faces)
let(points = as_points(face,vertices))
cosine_between(normal(points), centroid(points)) < 0
? reverse(face) : face
];
//original data
points=[
[0,0,0], //0
[5,0,0], //1
[5,100,0], //2
[0,100,0], //3
[0,0,10], //4
[5,0,10], //5
[5,100,10], //6
[0,100,10], //7
[2.5,100,20],//8
[2.5,0,20],//9
[2.5,120,0],//10
[0,0,0]];
faces = [
[0,1,2,3], //bottom
[0,3,7,4], //left
[1,2,6,5], //right
[1,0,4,5], //front
[3,2,6,7], //back
[4,7,8,9], //left blade
[5,9,8,6], //right blade
[4,9,5], // back 2
[7,8,6], //front 2
[3,10,7], //piont left
[7,8,10], //tip
[10,6,2],
[10,8,6]]
;
oriented_faces = lhs_faces(faces,points);
polyhedron(points=points,faces=oriented_faces);
--
View this message in context: http://forum.openscad.org/polyhedron-to-a-3D-printing-from-tp18692p21162.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
Bit late to the scene on this one but its useful to be able to orient faces
when 'thrown-together' shows some faces are the wrong way round. This is
the code I use:
// ensure that all faces have a lhs orientation
function reverse(l) =
[for (i=[1:len(l)]) l[len(l)-i]];
function orthogonal(v0,v1,v2) = cross(v1-v0,v2-v1);
function normal(face) =
let (n=orthogonal(face[0],face[1],face[2]))
- n / norm(n);
function vsum(points,i=0) =
i < len(points)
? (points[i] + vsum(points,i+1))
: [0,0,0];
function centroid(points) =
vsum(points) / len(points);
function as_points(indexes,points) =
[for (i=[0:len(indexes)-1])
points[indexes[i]]
];
function cosine_between(u, v) =(u * v) / (norm(u) * norm(v));
function lhs_faces(faces,vertices) =
[for (face = faces)
let(points = as_points(face,vertices))
cosine_between(normal(points), centroid(points)) < 0
? reverse(face) : face
];
//original data
points=[
[0,0,0], //0
[5,0,0], //1
[5,100,0], //2
[0,100,0], //3
[0,0,10], //4
[5,0,10], //5
[5,100,10], //6
[0,100,10], //7
[2.5,100,20],//8
[2.5,0,20],//9
[2.5,120,0],//10
[0,0,0]];
faces = [
[0,1,2,3], //bottom
[0,3,7,4], //left
[1,2,6,5], //right
[1,0,4,5], //front
[3,2,6,7], //back
[4,7,8,9], //left blade
[5,9,8,6], //right blade
[4,9,5], // back 2
[7,8,6], //front 2
[3,10,7], //piont left
[7,8,10], //tip
[10,6,2],
[10,8,6]]
;
oriented_faces = lhs_faces(faces,points);
polyhedron(points=points,faces=oriented_faces);
--
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RP
Ronaldo Persiano
Mon, Apr 10, 2017 7:38 PM
It doesn't work with:
//original data
p=[
[0,0,0], //0
[5,0,0], //1
[5,100,0], //2
[0,100,0], //3
[0,0,10], //4
[5,0,10], //5
[5,100,10], //6
[0,100,10], //7
[2.5,100,20],//8
[2.5,0,20],//9
[2.5,120,0],//10
[0,0,0]];
points = [for(pi=p) pi-[0,200,0]];
2017-04-10 16:10 GMT-03:00 kitwallace kit.wallace@gmail.com:
Bit late to the scene on this one but its useful to be able to orient faces
when 'thrown-together' shows some faces are the wrong way round. This is
the code I use:
It doesn't work with:
//original data
p=[
[0,0,0], //0
[5,0,0], //1
[5,100,0], //2
[0,100,0], //3
[0,0,10], //4
[5,0,10], //5
[5,100,10], //6
[0,100,10], //7
[2.5,100,20],//8
[2.5,0,20],//9
[2.5,120,0],//10
[0,0,0]];
points = [for(pi=p) pi-[0,200,0]];
2017-04-10 16:10 GMT-03:00 kitwallace <kit.wallace@gmail.com>:
> Bit late to the scene on this one but its useful to be able to orient faces
> when 'thrown-together' shows some faces are the wrong way round. This is
> the code I use:
>
K
kitwallace
Mon, Apr 10, 2017 7:44 PM
Odd - works for me.
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Odd - works for me.
--
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