J
jon
Sat, Oct 8, 2016 2:39 PM
When I create this STL, it is defective, but I cannot figure out what
the defect is. It looks fine in OpenSCAD.
minID = 35;
maxID = 45;
ht = 25;
th = 2;
$fn = 100;
minIR = minID/2;
maxIR = maxID/2;
module Cup()
rotate_extrude(convexity = 10)
polygon([[0,0],
[-minIR-th,0],
[-maxIR-th,ht],
[-maxIR-th-th,ht],
[-maxIR-th-th,ht+th],
[-maxIR,ht+th],
[-minIR,th],
[0,th]]);
Cup();
When I create this STL, it is defective, but I cannot figure out what
the defect is. It looks fine in OpenSCAD.
minID = 35;
maxID = 45;
ht = 25;
th = 2;
$fn = 100;
minIR = minID/2;
maxIR = maxID/2;
module Cup()
rotate_extrude(convexity = 10)
polygon([[0,0],
[-minIR-th,0],
[-maxIR-th,ht],
[-maxIR-th-th,ht],
[-maxIR-th-th,ht+th],
[-maxIR,ht+th],
[-minIR,th],
[0,th]]);
Cup();
RU
Richard Urwin
Sat, Oct 8, 2016 3:21 PM
The whole thing is inside-out.
If you view it in Thrown-together mode it's all purple. If you view it in
MeshLab it's black.
To fix it, you can tell MeshaLab to reverse all the faces, Then it comes out
nice and grey like it is supposed to.
https://dl.dropboxusercontent.com/u/96640124/screenshot.png
Maybe you need to reverse the order of the nodes? I'm not enough of an
expert on OpenSCAD to know, but that is the issue.
--
View this message in context: http://forum.openscad.org/problem-STL-tp18608p18609.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
The whole thing is inside-out.
If you view it in Thrown-together mode it's all purple. If you view it in
MeshLab it's black.
To fix it, you can tell MeshaLab to reverse all the faces, Then it comes out
nice and grey like it is supposed to.
https://dl.dropboxusercontent.com/u/96640124/screenshot.png
Maybe you need to reverse the order of the nodes? I'm not enough of an
expert on OpenSCAD to know, but that is the issue.
--
View this message in context: http://forum.openscad.org/problem-STL-tp18608p18609.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
J
jon
Sat, Oct 8, 2016 3:26 PM
Thank you. I guess the polygon builder got everything backwards? Or I
entered the points backwards.
Jon
On 10/8/2016 11:21 AM, Richard Urwin wrote:
Thank you. I guess the polygon builder got everything backwards? Or I
entered the points backwards.
Jon
On 10/8/2016 11:21 AM, Richard Urwin wrote:
> The whole thing is inside-out.
>
> If you view it in Thrown-together mode it's all purple. If you view it in
> MeshLab it's black.
>
> To fix it, you can tell MeshaLab to reverse all the faces, Then it comes out
> nice and grey like it is supposed to.
>
> https://dl.dropboxusercontent.com/u/96640124/screenshot.png
>
> Maybe you need to reverse the order of the nodes? I'm not enough of an
> expert on OpenSCAD to know, but that is the issue.
>
>
>
> --
> View this message in context: http://forum.openscad.org/problem-STL-tp18608p18609.html
> Sent from the OpenSCAD mailing list archive at Nabble.com.
>
> _______________________________________________
> OpenSCAD mailing list
> Discuss@lists.openscad.org
> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
>
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2016.0.7797 / Virus Database: 4656/13167 - Release Date: 10/07/16
>
>
RP
Ronaldo Persiano
Sat, Oct 8, 2016 3:28 PM
When I create this STL, it is defective, but I cannot figure out what the
defect is. It looks fine in OpenSCAD.
How have you detected it is defective? I had no issues importing the cup
stl file in OpenSCAD (Windows version 2015.03-2 ).
2016-10-08 11:39 GMT-03:00 jon <jon@jonbondy.com>:
> When I create this STL, it is defective, but I cannot figure out what the
> defect is. It looks fine in OpenSCAD.
>
How have you detected it is defective? I had no issues importing the cup
stl file in OpenSCAD (Windows version 2015.03-2 ).
J
jon
Sat, Oct 8, 2016 3:35 PM
Turns out if the shape is on the negative part of the Y plane, it will
always be inside out.
On 10/8/2016 11:21 AM, Richard Urwin wrote:
Turns out if the shape is on the negative part of the Y plane, it will
always be inside out.
On 10/8/2016 11:21 AM, Richard Urwin wrote:
> The whole thing is inside-out.
>
> If you view it in Thrown-together mode it's all purple. If you view it in
> MeshLab it's black.
>
> To fix it, you can tell MeshaLab to reverse all the faces, Then it comes out
> nice and grey like it is supposed to.
>
> https://dl.dropboxusercontent.com/u/96640124/screenshot.png
>
> Maybe you need to reverse the order of the nodes? I'm not enough of an
> expert on OpenSCAD to know, but that is the issue.
>
>
>
> --
> View this message in context: http://forum.openscad.org/problem-STL-tp18608p18609.html
> Sent from the OpenSCAD mailing list archive at Nabble.com.
>
> _______________________________________________
> OpenSCAD mailing list
> Discuss@lists.openscad.org
> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
>
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2016.0.7797 / Virus Database: 4656/13167 - Release Date: 10/07/16
>
>
J
jon
Sat, Oct 8, 2016 3:36 PM
It appears as defective in NetFabb, and I cannot print it.
On 10/8/2016 11:28 AM, Ronaldo Persiano wrote:
It appears as defective in NetFabb, and I cannot print it.
On 10/8/2016 11:28 AM, Ronaldo Persiano wrote:
> 2016-10-08 11:39 GMT-03:00 jon <jon@jonbondy.com
> <mailto:jon@jonbondy.com>>:
>
> When I create this STL, it is defective, but I cannot figure out
> what the defect is. It looks fine in OpenSCAD.
>
>
> How have you detected it is defective? I had no issues importing the
> cup stl file in OpenSCAD(Windows version 2015.03-2).
>
>
> _______________________________________________
> OpenSCAD mailing list
> Discuss@lists.openscad.org
> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
>
>
> No virus found in this message.
> Checked by AVG - www.avg.com <http://www.avg.com>
> Version: 2016.0.7797 / Virus Database: 4656/13167 - Release Date: 10/07/16
>
CA
Carsten Arnholm
Sat, Oct 8, 2016 3:58 PM
Your polygon is defined clockwise. Unless I am mistaken it needs to be
counterclockwise. Either reverse the order of the points or reverse the
sign of one of the coordinates.
As this is rotation symmetry about Z, it works to simply flip the sign
for the x coordinates:
minID = 35;
maxID = 45;
ht = 25;
th = 2;
$fn = 100;
minIR = minID/2;
maxIR = maxID/2;
module Cup()
rotate_extrude(convexity = 10)
polygon([[0,0],
[minIR+th,0],
[maxIR+th,ht],
[maxIR+th+th,ht],
[maxIR+th+th,ht+th],
[maxIR,ht+th],
[minIR,th],
[0,th]]);
Cup();
Carsten Arnholm
On 08. okt. 2016 16:39, jon wrote:
When I create this STL, it is defective, but I cannot figure out what
the defect is. It looks fine in OpenSCAD.
minID = 35;
maxID = 45;
ht = 25;
th = 2;
$fn = 100;
minIR = minID/2;
maxIR = maxID/2;
module Cup()
rotate_extrude(convexity = 10)
polygon([[0,0],
[-minIR-th,0],
[-maxIR-th,ht],
[-maxIR-th-th,ht],
[-maxIR-th-th,ht+th],
[-maxIR,ht+th],
[-minIR,th],
[0,th]]);
Cup();
OpenSCAD mailing list
Discuss@lists.openscad.org
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
Your polygon is defined clockwise. Unless I am mistaken it needs to be
counterclockwise. Either reverse the order of the points or reverse the
sign of one of the coordinates.
As this is rotation symmetry about Z, it works to simply flip the sign
for the x coordinates:
minID = 35;
maxID = 45;
ht = 25;
th = 2;
$fn = 100;
minIR = minID/2;
maxIR = maxID/2;
module Cup()
rotate_extrude(convexity = 10)
polygon([[0,0],
[minIR+th,0],
[maxIR+th,ht],
[maxIR+th+th,ht],
[maxIR+th+th,ht+th],
[maxIR,ht+th],
[minIR,th],
[0,th]]);
Cup();
Carsten Arnholm
On 08. okt. 2016 16:39, jon wrote:
> When I create this STL, it is defective, but I cannot figure out what
> the defect is. It looks fine in OpenSCAD.
>
>
> minID = 35;
> maxID = 45;
> ht = 25;
> th = 2;
>
> $fn = 100;
> minIR = minID/2;
> maxIR = maxID/2;
>
> module Cup()
> rotate_extrude(convexity = 10)
> polygon([[0,0],
> [-minIR-th,0],
> [-maxIR-th,ht],
> [-maxIR-th-th,ht],
> [-maxIR-th-th,ht+th],
> [-maxIR,ht+th],
> [-minIR,th],
> [0,th]]);
>
> Cup();
>
>
> _______________________________________________
> OpenSCAD mailing list
> Discuss@lists.openscad.org
> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
>
TP
Torsten Paul
Sat, Oct 8, 2016 4:01 PM
On 10/08/2016 05:35 PM, jon wrote:
Turns out if the shape is on the negative part of the Y plane,
it will always be inside out.
On 10/08/2016 05:35 PM, jon wrote:
> Turns out if the shape is on the negative part of the Y plane,
> it will always be inside out.
>
What version of OpenSCAD is that? Latest release?
I guess, that fix might be only in the snapshot versions:
https://github.com/openscad/openscad/issues/1282
ciao,
Torsten.
J
jon
Sat, Oct 8, 2016 4:25 PM
2105.03
Yeah. I know. <blush>
On 10/8/2016 12:01 PM, Torsten Paul wrote:
On 10/08/2016 05:35 PM, jon wrote:
Turns out if the shape is on the negative part of the Y plane,
it will always be inside out.
2105.03
Yeah. I know. <blush>
On 10/8/2016 12:01 PM, Torsten Paul wrote:
> On 10/08/2016 05:35 PM, jon wrote:
>> Turns out if the shape is on the negative part of the Y plane,
>> it will always be inside out.
>>
> What version of OpenSCAD is that? Latest release?
>
> I guess, that fix might be only in the snapshot versions:
> https://github.com/openscad/openscad/issues/1282
>
> ciao,
> Torsten.
>
>
> _______________________________________________
> OpenSCAD mailing list
> Discuss@lists.openscad.org
> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
>
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2016.0.7797 / Virus Database: 4656/13171 - Release Date: 10/08/16
>
>
R
Ronaldo
Sat, Oct 8, 2016 7:42 PM
Your polygon is defined clockwise. Unless I am mistaken it needs to be
counterclockwise. Either reverse the order of the points or reverse the
sign of one of the coordinates.
The polygon vertex circulation does not affect the orientation of the model
generated by rotate_extrude, neither with negative angles.
--
View this message in context: http://forum.openscad.org/problem-STL-tp18608p18620.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
cacb wrote
> Your polygon is defined clockwise. Unless I am mistaken it needs to be
> counterclockwise. Either reverse the order of the points or reverse the
> sign of one of the coordinates.
The polygon vertex circulation does not affect the orientation of the model
generated by rotate_extrude, neither with negative angles.
--
View this message in context: http://forum.openscad.org/problem-STL-tp18608p18620.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
