extrude to center
got a nice stl from the planet. I isolated the land parts by differing with a
sphere. I would like to create a 2 color 3d print from the globe but the
landpart is in most places too thin. I have tried to create shells of scaled
down instances but either the shells are too far apart or I run into CGAL
errors.
Any way to extrude all the vertices towords the center [0,0,0] or any other
idea? land7_repaired_1.zip
http://forum.openscad.org/file/n20432/land7_repaired_1.zip
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If you don't limit yourself to OpenSCAD, you can perform the task you
indicate by using MeshMixer.
Import the model into Meshmixer, use Select tool on left side. Press
Control-A to select the entire model.
Within the Select tool, select Edit, Offset.
I suggest changing the value in the Distance field rather than using the
slider. There are many calculations to be performed and the slider only
jumps a small amount (0.03mm in my test) while you can enter any figure for
quicker results.
http://forum.openscad.org/file/n20433/world.png
The above image was done with a 2mm offset. As you can see there are a few
artifacts which you may want to remove either before the offset, to improve
the processing speed, or after, when they are easier to see!
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ehhh, thanks a ton. there looks to be a way for almost everything. just know
your tools.
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On 14. feb. 2017 13:30, juerg.maier wrote:
got a nice stl from the planet. I isolated the land parts by differing with a
sphere. I would like to create a 2 color 3d print from the globe but the
landpart is in most places too thin. I have tried to create shells of scaled
down instances but either the shells are too far apart or I run into CGAL
errors.
Any way to extrude all the vertices towords the center [0,0,0] or any other
idea? land7_repaired_1.zip
http://forum.openscad.org/file/n20432/land7_repaired_1.zip
I had a look at this model, but it it contains a lot of non-manifold
edges after the sphere subtraction, not generally fixable. There are
also map artifacts in places which I suspect is due to the subtraction.
I think you should go back to the original (is it a scan?) and do the
isolation of land again. If you provide a link to the original I might
have a go at it.
Carsten Arnholm
Even coming back about this! Thank for the help!
My original is rather big and it took Meshmixer with 80% accuracy and a 2
mm offset the best part of a day on my maschine to accomplish it.
You are right, many problems with the resulting .STL. Tried to work on it
with openscad but that crashes even after trying to fix it with netfabb,
netfabb cloud, microsoft 3d tools. And to be able to do things in openscad
I had to divide it into 8 sub-parts (used too much memory otherwise).
I got the original file from here http://www.thingiverse.com/thing:1924651
and tried to use the earth_7_18.stl as my base stl.
I have a dual extruder 3d printer and wanted to print the land in a
different color and hollow out the globe of course.
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a. get a better PC or give up large graphics.
b. Netfabb etc cannot fix everything.
b. Garbage-in, garbage-out, when other utilities say it is garbage, why do
you expect OpenSCAD to do better?
So, maybe ask the thingiverse poster to provide a good stl?
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sorry Michal, I do not receive your answer as very helpful.
- I only stated that it took a long time on my PC to modify the stl, I did
not complain about it - all the programs I used to clean up the file stated everything is fine
with my STL. Why are you talking of garbage?
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Thanks for the reference. I will take a look and report back if I find
something that might help.
Carsten Arnholm
On 19. feb. 2017 12:36, juerg.maier wrote:
Even coming back about this! Thank for the help!
My original is rather big and it took Meshmixer with 80% accuracy and a 2
mm offset the best part of a day on my maschine to accomplish it.
You are right, many problems with the resulting .STL. Tried to work on it
with openscad but that crashes even after trying to fix it with netfabb,
netfabb cloud, microsoft 3d tools. And to be able to do things in openscad
I had to divide it into 8 sub-parts (used too much memory otherwise).
I got the original file from here http://www.thingiverse.com/thing:1924651
and tried to use the earth_7_18.stl as my base stl.
I have a dual extruder 3d printer and wanted to print the land in a
different color and hollow out the globe of course.
You can try this link, it will last for a couple of days.
https://www.expirebox.com/download/d844bd5d8ce0099fe0a573ab42d174bf.html
It contains 3 files
-
earth_730_all.stl = original STL file (earth_7_30.stl) repaired in my
software + scaled up factor 100 -
earth_730_sphere.stl - a "near sphere" used for subtraction
radius = 99.47
translated (0.437,-0.21,-0.312) -
earth_730_diff.stl = difference between 1 & 2 computed outside
OpenSCAD. It is somewhat crude, e.g. in south-east asia, but I don't
think it is possible to improve very much.
With OpenSCAD, the following would be an equivalent operation:
difference() {
import("earth_730_all.stl");
translate([0.437,-0.21,-0.312])sphere(99.47);
}
However, I could not get this to work in OpenSCAD version 2016.10.04
(git 7e0935d) Windows
Carsten Arnholm
On 19. feb. 2017 20:00, Carsten Arnholm wrote:
Thanks for the reference. I will take a look and report back if I find
something that might help.
Carsten Arnholm
On 19. feb. 2017 12:36, juerg.maier wrote:
Even coming back about this! Thank for the help!
My original is rather big and it took Meshmixer with 80% accuracy and a 2
mm offset the best part of a day on my maschine to accomplish it.
You are right, many problems with the resulting .STL. Tried to work on it
with openscad but that crashes even after trying to fix it with netfabb,
netfabb cloud, microsoft 3d tools. And to be able to do things in
openscad
I had to divide it into 8 sub-parts (used too much memory otherwise).
I got the original file from here
http://www.thingiverse.com/thing:1924651
and tried to use the earth_7_18.stl as my base stl.
I have a dual extruder 3d printer and wanted to print the land in a
different color and hollow out the globe of course.
cacb wrote
- earth_730_all.stl = original STL file (earth_7_30.stl) repaired in my
software + scaled up factor 100
...
However, I could not get this to work in OpenSCAD version 2016.10.04
(git 7e0935d) Windows
"repaired"??
http://forum.openscad.org/file/n20497/earth_fixed_.jpg
Admin - PM me if you need anything, or if I've done something stupid...
Unless specifically shown otherwise above, my contribution is in the Public Domain; to the extent possible under law, I have waived all copyright and related or neighbouring rights to this work. Obviously inclusion of works of previous authors is not included in the above.
The TPP is no simple “trade agreement.” Fight it! http://www.ourfairdeal.org/ time is running out!
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