debugging a polyhedron....
On 1/20/2022 4:03 AM, nop head wrote:
That gives me this, which is clearly broken, even in the preview. Is
that what you see?
image.png
Places where from some angles you can see through the model are a dead
giveaway for convexity problems. Setting convexity=2 in the
polyhedron() call fixes this.
I still think that we should set the default convexity to 10, to make
the vast majority of these problems go away with only a very small
performance hit.
I vote for a default convexity of 100. We all waste far too much time
on this, both when coding, and when answering unnecessary questions for
others.
Jon
On 1/20/2022 11:13 AM, Jordan Brown wrote:
Places where from some angles you can see through the model are a dead
giveaway for convexity problems. Setting convexity=2 in the
polyhedron() call fixes this.
I still think that we should set the default convexity to 10, to make
the vast majority of these problems go away with only a very small
performance hit.
High convexity has a preview performance hit on complex models.
-----Original Message-----
From: jon [mailto:jon@jonbondy.com]
Sent: Fri, 21 Jan 2022 03:18
To: OpenSCAD general discussion; Jordan Brown; nop head
Subject: [OpenSCAD] Re: debugging a polyhedron....
I vote for a default convexity of 100. We all waste far too much time
on this, both when coding, and when answering unnecessary questions for
others.
Jon
On 1/20/2022 11:13 AM, Jordan Brown wrote:
Places where from some angles you can see through the model are a dead
giveaway for convexity problems. Setting convexity=2 in the
polyhedron() call fixes this.
I still think that we should set the default convexity to 10, to make
the vast majority of these problems go away with only a very small
performance hit.
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How about a user-configurable preference. If you want the default to be
2, that's great; if I want the default to be 30, that is also great.
:)
On 1/20/2022 7:44 PM, Michael Marx wrote:
High convexity has a preview performance hit on complex models.
-----Original Message-----
From: jon [mailto:jon@jonbondy.com]
Sent: Fri, 21 Jan 2022 03:18
To: OpenSCAD general discussion; Jordan Brown; nop head
Subject: [OpenSCAD] Re: debugging a polyhedron....I vote for a default convexity of 100. We all waste far too much time
on this, both when coding, and when answering unnecessary questions for
others.Jon
On 1/20/2022 11:13 AM, Jordan Brown wrote:
Places where from some angles you can see through the model are a dead
giveaway for convexity problems. Setting convexity=2 in the
polyhedron() call fixes this.I still think that we should set the default convexity to 10, to make
the vast majority of these problems go away with only a very small
performance hit.
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org
A .ini file (xml text) could hold all of the system "defaults" like
convexity, $fn, etc... . Place it in the same folder as the openscad.exe
application. Don't put anything in the ini file that could even remotely
result in a security conundrum and it shouldn't be all that onerous. If
".ini" is some kind of taboo, then just make it an ".scad" file with a
"defaults()" function that allows any of the deemed defaults to be
configured. Calling "defaults()" from the top of an scad model would
configure the defaults for the session.
On Thu, Jan 20, 2022 at 6:48 PM jon jon@jonbondy.com wrote:
How about a user-configurable preference. If you want the default to be
2, that's great; if I want the default to be 30, that is also great.
:)
On 1/20/2022 7:44 PM, Michael Marx wrote:
High convexity has a preview performance hit on complex models.
-----Original Message-----
From: jon [mailto:jon@jonbondy.com]
Sent: Fri, 21 Jan 2022 03:18
To: OpenSCAD general discussion; Jordan Brown; nop head
Subject: [OpenSCAD] Re: debugging a polyhedron....
I vote for a default convexity of 100. We all waste far too much time
on this, both when coding, and when answering unnecessary questions for
others.
Jon
On 1/20/2022 11:13 AM, Jordan Brown wrote:
Places where from some angles you can see through the model are a dead
giveaway for convexity problems. Setting convexity=2 in the
polyhedron() call fixes this.
I still think that we should set the default convexity to 10, to make
the vast majority of these problems go away with only a very small
performance hit.
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
On 1/20/2022 5:07 PM, FF Systems wrote:
A .ini file (xml text) could hold all of the system "defaults" like
convexity, $fn, etc... . Place it in the same folder as the
openscad.exe application. Don't put anything in the ini file that
could even remotely result in a security conundrum and it shouldn't be
all that onerous. If ".ini" is some kind of taboo, then just make it
an ".scad" file with a "defaults()" function that allows any of the
deemed defaults to be configured. Calling "defaults()" from the top
of an scad model would configure the defaults for the session.
We already have a per-user preferences method that covers much of the need.
For per-model... we can perhaps have $ variables that control some
things, and then the users are free to set those however they desire -
perhaps by "include <defaults.scad>". Note that a defaults() module can
never do the right thing because of variable scoping; any changes that
it made would go out of scope when it returns.
I've done a little with changing the default for convexity. I think
I'll look at making it both a preference and a $ variable, with the $
variable getting its default from the preference.