working with a complex model
I'm working with a complex model, one that takes minutes to compute.
I'm fiddling with a small part of the model: most of the model never
changes.
Is there any way to compute that invariant part once, so that the
re-calculations are less time consuming as I work on the rest of the model?
Thanks!
Jon
If you put render() around it then it gets computed by CGAL and cached. So
F5 is slow if it changes but fast if it doesn't. Don't forget to set the
convexity parameter if you don an operations on it outside the render.
On 17 June 2015 at 14:18, jon jon@jonbondy.com wrote:
I'm working with a complex model, one that takes minutes to compute. I'm
fiddling with a small part of the model: most of the model never changes.
Is there any way to compute that invariant part once, so that the
re-calculations are less time consuming as I work on the rest of the model?
Thanks!
Jon
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So THAT is what render() is for! The description says to use when
"boolean operations become slow". I had no idea...
As always, thank you for your help!
Jon
On 6/17/2015 9:27 AM, nop head wrote:
If you put render() around it then it gets computed by CGAL and
cached. So F5 is slow if it changes but fast if it doesn't. Don't
forget to set the convexity parameter if you don an operations on it
outside the render.
On 17 June 2015 at 14:18, jon <jon@jonbondy.com
mailto:jon@jonbondy.com> wrote:
I'm working with a complex model, one that takes minutes to
compute. I'm fiddling with a small part of the model: most of the
model never changes.
Is there any way to compute that invariant part once, so that the
re-calculations are less time consuming as I work on the rest of
the model?
Thanks!
Jon
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The things that are computed in my render() are essentially global
variables, that are used elsewhere in the script. They then become
unknown outside the scope of the render().
On 6/17/2015 9:27 AM, nop head wrote:
If you put render() around it then it gets computed by CGAL and
cached. So F5 is slow if it changes but fast if it doesn't. Don't
forget to set the convexity parameter if you don an operations on it
outside the render.
On 17 June 2015 at 14:18, jon <jon@jonbondy.com
mailto:jon@jonbondy.com> wrote:
I'm working with a complex model, one that takes minutes to
compute. I'm fiddling with a small part of the model: most of the
model never changes.
Is there any way to compute that invariant part once, so that the
re-calculations are less time consuming as I work on the rest of
the model?
Thanks!
Jon
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You only need to put the geometry in the render(), not variable definitions
that need to be global.
The way I make a large assembly like Mendel90 is to have a module for each
printed part. When that is used in an assembly it is rendered. That means I
can work on the part on its own without the render but the large assembly
of parts is still fast because they are all cached. All my vitamins have
renders in them one for each colour. So if I use a lot of fasteners there
is only one cached version of each size of screw, for example.
Using render also gets rid of artefacts in OpenSCG caused by negative parts
of one object interfering with another object.
On 17 June 2015 at 15:46, jon jon@jonbondy.com wrote:
The things that are computed in my render() are essentially global
variables, that are used elsewhere in the script. They then become unknown
outside the scope of the render().
On 6/17/2015 9:27 AM, nop head wrote:
If you put render() around it then it gets computed by CGAL and cached. So
F5 is slow if it changes but fast if it doesn't. Don't forget to set the
convexity parameter if you don an operations on it outside the render.
On 17 June 2015 at 14:18, jon jon@jonbondy.com wrote:
I'm working with a complex model, one that takes minutes to compute. I'm
fiddling with a small part of the model: most of the model never changes.
Is there any way to compute that invariant part once, so that the
re-calculations are less time consuming as I work on the rest of the model?
Thanks!
Jon
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Discuss@lists.openscad.org
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
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You can also use the "!" modifier
https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Modifier_Characters to
just work on a small bit of code at a time, iif you don't need the rest of
the model for visual reference.
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. This work is published globally via the internet. :) 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/
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Wow. There are a bunch of new (?) modifiers I didn't know about.
Thanks for that Michael.
On 18 June 2015 at 08:35, MichaelAtOz oz.at.michael@gmail.com wrote:
You can also use the "!" modifier
https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Modifier_Characters to
just work on a small bit of code at a time, iif you don't need the rest of
the model for visual reference.
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. This work is published globally via the internet. :) 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/
View this message in context: http://forum.openscad.org/working-with-a-complex-model-tp12906p12911.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
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