is there way to add non-printing text to STL file?
Maybe you guys have this same problem.... I export many STLs with variations
from my openscad code. Then I forget what type of variations they are. What
I would like is a way to have the key details of my particular STL embedded
in the STL file so in the future I can see what variables were utlized in
the original Openscad file to create that STL.
Anyone have any thoughts. My first thing was to use text command and write
out the text next to the object, but the program does not allow me to have
2D objects inside a 3D stl file.
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Could OpenSCAD have an option to write to the STL' file's meta-data for that? Something like MP3 files or digital photographs?
On 10 October 2017 3:58:03 am AEDT, memsfactory amishtravel@gmail.com wrote:
Maybe you guys have this same problem.... I export many STLs with
variations
from my openscad code. Then I forget what type of variations they are.
What
I would like is a way to have the key details of my particular STL
embedded
in the STL file so in the future I can see what variables were utlized
in
the original Openscad file to create that STL.
Anyone have any thoughts. My first thing was to use text command and
write
out the text next to the object, but the program does not allow me to
have
2D objects inside a 3D stl file.
--
Sent from: http://forum.openscad.org/
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http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
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http://www.fabbers.com/tech/STL_Format
oh that the STL format had a facility to include META data....
On 09/10/17 18:36, Rob Ward wrote:
Could OpenSCAD have an option to write to the STL' file's meta-data
for that? Something like MP3 files or digital photographs?
On 10 October 2017 3:58:03 am AEDT, memsfactory
amishtravel@gmail.com wrote:
Maybe you guys have this same problem.... I export many STLs with variations
from my openscad code. Then I forget what type of variations they are. What
I would like is a way to have the key details of my particular STL embedded
in the STL file so in the future I can see what variables were utlized in
the original Openscad file to create that STL.
Anyone have any thoughts. My first thing was to use text command and write
out the text next to the object, but the program does not allow me to have
2D objects inside a 3D stl file.
--
Sent from:http://forum.openscad.org/
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I thought provision for meta data was a function of the filing system, not the primary contents of the file. Image files just have a lot of consistently named tags that have evolved as popular over time across camera makers, STL's do not, but it is possible without rewriting the STL data format?
On 10 October 2017 4:47:10 am AEDT, Mr C Camacho chris@bedroomcoders.co.uk wrote:
http://www.fabbers.com/tech/STL_Format
oh that the STL format had a facility to include META data....
On 09/10/17 18:36, Rob Ward wrote:
Could OpenSCAD have an option to write to the STL' file's meta-data
for that? Something like MP3 files or digital photographs?
On 10 October 2017 3:58:03 am AEDT, memsfactory
amishtravel@gmail.com wrote:
Maybe you guys have this same problem.... I export many STLs with
variations
from my openscad code. Then I forget what type of variations they
are. What
I would like is a way to have the key details of my particular
STL embedded
in the STL file so in the future I can see what variables were
utlized in
the original Openscad file to create that STL.
Anyone have any thoughts. My first thing was to use text command
and write
out the text next to the object, but the program does not allow
me to have
2D objects inside a 3D stl file.
--
Sent from:http://forum.openscad.org/
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In ASCII format, there is no provision to metadata but the 80 bytes header
of the binary format might be used to short metadata. This header seems to
be disregarded by most softwares,
2017-10-09 15:08 GMT-03:00 Rob Ward rl.ward@bigpond.com:
I thought provision for meta data was a function of the filing system, not
the primary contents of the file. Image files just have a lot of
consistently named tags that have evolved as popular over time across
camera makers, STL's do not, but it is possible without rewriting the STL
data format?
On 10 October 2017 4:47:10 am AEDT, Mr C Camacho <
chris@bedroomcoders.co.uk> wrote:
http://www.fabbers.com/tech/STL_Format
oh that the STL format had a facility to include META data....
On 09/10/17 18:36, Rob Ward wrote:
Could OpenSCAD have an option to write to the STL' file's meta-data for
that? Something like MP3 files or digital photographs?
On 10 October 2017 3:58:03 am AEDT, memsfactory amishtravel@gmail.com
amishtravel@gmail.com wrote:
Maybe you guys have this same problem.... I export many STLs with variations
from my openscad code. Then I forget what type of variations they are. What
I would like is a way to have the key details of my particular STL embedded
in the STL file so in the future I can see what variables were utlized in
the original Openscad file to create that STL.
Anyone have any thoughts. My first thing was to use text command and write
out the text next to the object, but the program does not allow me to have
2D objects inside a 3D stl file.
--
Sent from: http://forum.openscad.org/
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It's an ugly hack but I work with ASCII STL files and I add whatever I want
after the "endsolid" line without any problems.
The software I use (OpenSCAD, Cura & Netfabb) does not complaint about it.
But of course, it doesn't survive any extra save operation.
Before trying that I played with really thin 3D text (~0.001mm) but the
extra ASCII is more scriptable, which fits my needs better.
2017-10-09 18:58 GMT+02:00 memsfactory amishtravel@gmail.com:
Maybe you guys have this same problem.... I export many STLs with
variations
from my openscad code. Then I forget what type of variations they are. What
I would like is a way to have the key details of my particular STL embedded
in the STL file so in the future I can see what variables were utlized in
the original Openscad file to create that STL.
Anyone have any thoughts. My first thing was to use text command and write
out the text next to the object, but the program does not allow me to have
2D objects inside a 3D stl file.
--
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Regards from Spain,
Antonio
Thanks... that's a start. :)
It's an ugly hack but I work with ASCII STL files and I add whatever I want
after the "endsolid" line without any problems.
The software I use (OpenSCAD, Cura & Netfabb) does not complaint about it.
But of course, it doesn't survive any extra save operation.
Before trying that I played with really thin 3D text (~0.001mm) but the
extra ASCII is more scriptable, which fits my needs better.
--
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Hi, very new to this so probably my advice is not that useful but you can add
the comments in 3d fonts (linear extrude it). It will complicate and make
the stl much larger and you will have to remember to remove it before
machining but... Its a start.
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OpenSCAD currently starts the (ASCII) STL with 'solid OpenSCAD_Model', which
is the spec 'solid <name>'
I have not seen anywhere further specification of <name>, so I presume it is
anything until EOL.
The binary has an 80-character header which can be anything, except for
starting with 'solid'*.
AMF has metadata capability too.
I have been thinking OpenSCAD could use the binary header (when it supports
binary) and the <name> to store relevant info.
Thus the name would be limited to 80 chars, it & binary header start with
'OpenSCAD,', then perhaps the OpenSCAD version (? - waste of limited space -
maybe at end?), then user data (truncated to fit).
Perhaps as simple as:
$meta=<user data string>;
??
- From Wikipedia: A binary STL file has an 80-character header (which is
generally ignored, but should never begin with "solid" because that will
lead most software to assume that this is an ASCII STL file
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On 2017-10-09 23:36, MichaelAtOz wrote:
- From Wikipedia: A binary STL file has an 80-character header (which
is
generally ignored, but should never begin with "solid" because that
will
lead most software to assume that this is an ASCII STL file
If you rely on "solid" for identifying ASCII STL files you will run into
problems at times, as there are binary STL files out there that have
headers beginning with "solid".
For metadata I think the "best" option is a second file named
appropriately. Or use AMF as suggested, as it allows embedded metadata.
Carsten Arnholm