Wrapping text around an STL
Wow! Finally a conceptually "simple" problem that the BOSL2 developers
cannot resolve. I never thought I would see the day!
Thanks for trying. I am constantly amazed at how BOSL2 changes as it
accepts challenges and wins, almost all of the time.
Jon
On 4/7/2022 4:28 PM, Revar Desmera wrote:
Turns out I would need perspective transforms, which OpenSCAD’s
multmatrix() won’t do. I could fake it by slicing the original
geometry up into innumerable pieces and scale them individually, but
that will take a long time, and will probably look like crap. Since
user-space access to geometry is not yet a thing, making a conical
cylintrical_extrude() looks infeasible.
It looks like path_text() is the workable solution, even if it doesn’t
get the perspective transformation. Which may actually be a reason to
use it instead anyways.
- Revar
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I think you're misunderstanding the situation. Projective
transformation is nonlinear, so it is impossible in OpenSCAD. We
can and already have the ability to write text on a cone using
path_text(). And conceptually writing text on a VNF would be possible
also---but the data has to be available. But OpenSCAD has
limitations, so in working with geometry instead of with data, many
things are impossible. That's why so much of BOSL2 cannot work with
geometry.
On Thu, Apr 7, 2022 at 6:53 PM jon jon@jonbondy.com wrote:
Wow! Finally a conceptually "simple" problem that the BOSL2 developers
cannot resolve. I never thought I would see the day!
Thanks for trying. I am constantly amazed at how BOSL2 changes as it
accepts challenges and wins, almost all of the time.
Jon
On 4/7/2022 4:28 PM, Revar Desmera wrote:
Turns out I would need perspective transforms, which OpenSCAD’s
multmatrix() won’t do. I could fake it by slicing the original
geometry up into innumerable pieces and scale them individually, but
that will take a long time, and will probably look like crap. Since
user-space access to geometry is not yet a thing, making a conical
cylintrical_extrude() looks infeasible.It looks like path_text() is the workable solution, even if it doesn’t
get the perspective transformation. Which may actually be a reason to
use it instead anyways.
- Revar
To unsubscribe send an email to discuss-leave@lists.openscad.org
OpenSCAD mailing list
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Adrian:
Sorry for being silly. I do understand. Thanks for all that you do for us
Jon
On 4/7/2022 7:22 PM, Adrian Mariano wrote:
I think you're misunderstanding the situation. Projective
transformation is nonlinear, so it is impossible in OpenSCAD. We
can and already have the ability to write text on a cone using
path_text(). And conceptually writing text on a VNF would be possible
also---but the data has to be available. But OpenSCAD has
limitations, so in working with geometry instead of with data, many
things are impossible. That's why so much of BOSL2 cannot work with
geometry.
On Thu, Apr 7, 2022 at 6:53 PM jon jon@jonbondy.com wrote:
Wow! Finally a conceptually "simple" problem that the BOSL2 developers
cannot resolve. I never thought I would see the day!Thanks for trying. I am constantly amazed at how BOSL2 changes as it
accepts challenges and wins, almost all of the time.Jon
On 4/7/2022 4:28 PM, Revar Desmera wrote:
Turns out I would need perspective transforms, which OpenSCAD’s
multmatrix() won’t do. I could fake it by slicing the original
geometry up into innumerable pieces and scale them individually, but
that will take a long time, and will probably look like crap. Since
user-space access to geometry is not yet a thing, making a conical
cylintrical_extrude() looks infeasible.It looks like path_text() is the workable solution, even if it doesn’t
get the perspective transformation. Which may actually be a reason to
use it instead anyways.
- Revar
To unsubscribe send an email to discuss-leave@lists.openscad.org
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org
If the approximate geometry of cone is known, then following should be
possible:
2 parallel planes cutting the cone.
Intersection points generated between cone and planes
Vectors between Intersection points of planes can give information on how
to orient the text.
Theoretically should not be very tough
On Tue, 5 Apr 2022, 00:19 jon, jon@jonbondy.com wrote:
I've seen recent postings about wrapping text around geometry created
using OpenSCAD itself, but what about wrapping "ORION" around this STL?
https://nasa3d.arc.nasa.gov/detail/orion-capsule
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I have written a short code here for text on cone:
https://github.com/sprabhakar2006/openSCAD/blob/main/text%20on%20cone
On Fri, 8 Apr 2022, 08:02 Sanjeev Prabhakar, sprabhakar2006@gmail.com
wrote:
If the approximate geometry of cone is known, then following should be
possible:
2 parallel planes cutting the cone.
Intersection points generated between cone and planes
Vectors between Intersection points of planes can give information on how
to orient the text.
Theoretically should not be very tough
On Tue, 5 Apr 2022, 00:19 jon, jon@jonbondy.com wrote:
I've seen recent postings about wrapping text around geometry created
using OpenSCAD itself, but what about wrapping "ORION" around this STL?
https://nasa3d.arc.nasa.gov/detail/orion-capsule
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