here's an interesting one to speed-optimize...
This one will F5 in a few seconds, but it's been 2.5 hours waiting for
F6 to complete. I know that it will, because I did it once before.
How would you speed it up?
Jon
$fn = 100;
rch = 0.1;
height = 200; // 30;
diam = 35;
module HoleCylinder()
cylinder(h = 100, d = diam/10);
difference() {
// outer
cylinder(h = height, d = diam);
// inner
translate([0, 0, -1])
cylinder(h = height + 2, d = diam - 4);
// reduce the bottom end
translate([0, 0, -1])
cylinder(h = 10 + 1, d = diam - 2 + rch);
// reduce the top end
translate([0, 0, height - 10])
difference() {
cylinder(h = 10 + 1, d = diam + 1);
cylinder(h = 10 + 1, d = diam - 2 - rch);
}
// holes
for (i = [15:5:height-15])
for (a = [0:15:359])
translate([0, 0, i])
rotate([0, 90, a])
HoleCylinder();
}
I would try: make a short cylinder with only one ring of holes, stick this
cylinder in a render(), and add as many of them together as you need.
I would also make the cylinder that punshes the holes as short as possible,
so they will not overlapp.
2015-12-05 23:43 GMT+01:00 jon jon@jonbondy.com:
This one will F5 in a few seconds, but it's been 2.5 hours waiting for F6
to complete. I know that it will, because I did it once before.
How would you speed it up?
Jon
$fn = 100;
rch = 0.1;
height = 200; // 30;
diam = 35;
module HoleCylinder()
cylinder(h = 100, d = diam/10);
difference() {
// outer
cylinder(h = height, d = diam);
// inner
translate([0, 0, -1])
cylinder(h = height + 2, d = diam - 4);
// reduce the bottom end
translate([0, 0, -1])
cylinder(h = 10 + 1, d = diam - 2 + rch);
// reduce the top end
translate([0, 0, height - 10])
difference() {
cylinder(h = 10 + 1, d = diam + 1);
cylinder(h = 10 + 1, d = diam - 2 - rch);
}
// holes
for (i = [15:5:height-15])
for (a = [0:15:359])
translate([0, 0, i])
rotate([0, 90, a])
HoleCylinder();
}
OpenSCAD mailing list
Discuss@lists.openscad.org
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
Consider whether you really need $fn=100 for all those HoleCylinder() elements. That’s where the bulk of the number-crunching is happening.
Andrew.
On Dec 5, 2015, at 5:43 PM, jon jon@jonbondy.com wrote:
This one will F5 in a few seconds, but it's been 2.5 hours waiting for F6 to complete. I know that it will, because I did it once before.
How would you speed it up?
Jon
$fn = 100;
rch = 0.1;
height = 200; // 30;
diam = 35;
module HoleCylinder()
cylinder(h = 100, d = diam/10);
difference() {
// outer
cylinder(h = height, d = diam);
// inner
translate([0, 0, -1])
cylinder(h = height + 2, d = diam - 4);
// reduce the bottom end
translate([0, 0, -1])
cylinder(h = 10 + 1, d = diam - 2 + rch);
// reduce the top end
translate([0, 0, height - 10])
difference() {
cylinder(h = 10 + 1, d = diam + 1);
cylinder(h = 10 + 1, d = diam - 2 - rch);
}
// holes
for (i = [15:5:height-15])
for (a = [0:15:359])
translate([0, 0, i])
rotate([0, 90, a])
HoleCylinder();
}
OpenSCAD mailing list
Discuss@lists.openscad.org
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
--
"The future is already here. It's just not very evenly distributed" -- William Gibson
There was a discussion some time back: the cutting of a gem did take very
long.
Cutting the individual faces of the gem lead to a lot of overlapping
differences() close to the origin.
Maybe something similar is happening here.
re-odering the differences() lead to faster render times.
2015-12-06 0:05 GMT+01:00 Andrew Plumb andrew@plumb.org:
Consider whether you really need $fn=100 for all those HoleCylinder()
elements. That’s where the bulk of the number-crunching is happening.
Andrew.
On Dec 5, 2015, at 5:43 PM, jon jon@jonbondy.com wrote:
This one will F5 in a few seconds, but it's been 2.5 hours waiting for F6
to complete. I know that it will, because I did it once before.
How would you speed it up?
Jon
$fn = 100;
rch = 0.1;
height = 200; // 30;
diam = 35;
module HoleCylinder()
cylinder(h = 100, d = diam/10);
difference() {
// outer
cylinder(h = height, d = diam);
// inner
translate([0, 0, -1])
cylinder(h = height + 2, d = diam - 4);
// reduce the bottom end
translate([0, 0, -1])
cylinder(h = 10 + 1, d = diam - 2 + rch);
// reduce the top end
translate([0, 0, height - 10])
difference() {
cylinder(h = 10 + 1, d = diam + 1);
cylinder(h = 10 + 1, d = diam - 2 - rch);
}
// holes
for (i = [15:5:height-15])
for (a = [0:15:359])
translate([0, 0, i])
rotate([0, 90, a])
HoleCylinder();
}
OpenSCAD mailing list
Discuss@lists.openscad.org
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
--
"The future is already here. It's just not very evenly distributed" --
William Gibson
OpenSCAD mailing list
Discuss@lists.openscad.org
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
height = 30; // 30;
diam = 35;
module HoleCylinder()
// translate([0,0,diam/2-4])#cylinder(h = 8, d = diam/10);
cylinder(h = 100, d = diam/10);
Setting height=30, it takes 1min 22sec to render with the long cylinder.
It takes only 0min 40sec to render with the shorter cylinders.
2015-12-06 0:19 GMT+01:00 Peter Falke stempeldergeschichte@googlemail.com:
There was a discussion some time back: the cutting of a gem did take very
long.
Cutting the individual faces of the gem lead to a lot of overlapping
differences() close to the origin.
Maybe something similar is happening here.
re-odering the differences() lead to faster render times.
2015-12-06 0:05 GMT+01:00 Andrew Plumb andrew@plumb.org:
Consider whether you really need $fn=100 for all those HoleCylinder()
elements. That’s where the bulk of the number-crunching is happening.
Andrew.
On Dec 5, 2015, at 5:43 PM, jon jon@jonbondy.com wrote:
This one will F5 in a few seconds, but it's been 2.5 hours waiting for F6
to complete. I know that it will, because I did it once before.
How would you speed it up?
Jon
$fn = 100;
rch = 0.1;
height = 200; // 30;
diam = 35;
module HoleCylinder()
cylinder(h = 100, d = diam/10);
difference() {
// outer
cylinder(h = height, d = diam);
// inner
translate([0, 0, -1])
cylinder(h = height + 2, d = diam - 4);
// reduce the bottom end
translate([0, 0, -1])
cylinder(h = 10 + 1, d = diam - 2 + rch);
// reduce the top end
translate([0, 0, height - 10])
difference() {
cylinder(h = 10 + 1, d = diam + 1);
cylinder(h = 10 + 1, d = diam - 2 - rch);
}
// holes
for (i = [15:5:height-15])
for (a = [0:15:359])
translate([0, 0, i])
rotate([0, 90, a])
HoleCylinder();
}
OpenSCAD mailing list
Discuss@lists.openscad.org
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
--
"The future is already here. It's just not very evenly distributed" --
William Gibson
OpenSCAD mailing list
Discuss@lists.openscad.org
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
If I make the cylinder into a module(), then I would not need the
render() would I, except to speed up the F5, which is already quite fast
:)
On 12/5/2015 6:01 PM, Peter Falke wrote:
I would try: make a short cylinder with only one ring of holes, stick
this cylinder in a render(), and add as many of them together as you need.
I would also make the cylinder that punshes the holes as short as
possible, so they will not overlapp.
2015-12-05 23:43 GMT+01:00 jon <jon@jonbondy.com
mailto:jon@jonbondy.com>:
This one will F5 in a few seconds, but it's been 2.5 hours waiting
for F6 to complete. I know that it will, because I did it once
before.
How would you speed it up?
Jon
$fn = 100;
rch = 0.1;
height = 200; // 30;
diam = 35;
module HoleCylinder()
cylinder(h = 100, d = diam/10);
difference() {
// outer
cylinder(h = height, d = diam);
// inner
translate([0, 0, -1])
cylinder(h = height + 2, d = diam - 4);
// reduce the bottom end
translate([0, 0, -1])
cylinder(h = 10 + 1, d = diam - 2 + rch);
// reduce the top end
translate([0, 0, height - 10])
difference() {
cylinder(h = 10 + 1, d = diam + 1);
cylinder(h = 10 + 1, d = diam - 2 - rch);
}
// holes
for (i = [15:5:height-15])
for (a = [0:15:359])
translate([0, 0, i])
rotate([0, 90, a])
HoleCylinder();
}
_______________________________________________
OpenSCAD mailing list
Discuss@lists.openscad.org <mailto:Discuss@lists.openscad.org>
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
OpenSCAD mailing list
Discuss@lists.openscad.org
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
No virus found in this message.
Checked by AVG - www.avg.com http://www.avg.com
Version: 2016.0.7227 / Virus Database: 4477/11118 - Release Date: 12/05/15
I agree with clothbot, $fn=100 appears a little excessive!
I have generally stopped using $fn, $fs & $fa since it can be hard to
determine sensible values to use and falling back to a large value for $fn
is tempting and works but is slow. I use $fe (see
http://forum.openscad.org/fe-Tolerance-based-arc-approximation-tp14212p14933.html)
and would code as below.
Cheers,
Trygon
$fn = undef;
$fs=0.01; // very small => $fa used
$fe=0.1; // 0.1/4 for final output?
rch = 0.1;
height = 200; // 30;
diam = 35;
function fa(r)=$fn>0?360/($fn>3?$fn:3):
$fe>0?$fe<r?min(45,2acos(1-$fe/r)):45:
360/max(min(360/($fa>0.01?$fa:0.01),
2PI*r/($fs>0.01?$fs:0.01)),5);
module HoleCylinder()
cylinder(h = 100, d = diam/10, $fa=fa(diam/20));
difference() {
// outer
cylinder(h = height, d = diam, $fa=fa(diam/2));
// inner
translate([0, 0, -1])
cylinder(h = height + 2, d = diam - 4, $fa=fa((diam-4)/2));
// reduce the bottom end
translate([0, 0, -1])
cylinder(h = 10 + 1, d = diam - 2 + rch, $fa=fa((diam-2+rch)/2));
// reduce the top end
translate([0, 0, height - 10])
difference() {
cylinder(h = 10 + 1, d = diam + 1, $fa=fa((diam+1)/2));
cylinder(h = 10 + 1, d = diam - 2 - rch,
$fa=fa((diam-2-rch)/2));
}
// holes
for (i = [15:5:height-15])
for (a = [0:15:359])
translate([0, 0, i])
rotate([0, 90, a])
HoleCylinder();
}
--
View this message in context: http://forum.openscad.org/here-s-an-interesting-one-to-speed-optimize-tp14966p14977.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
Your code renders in 2 hours, 4 minutes, 48 seconds on my machine.
With the shorter cylinders, that dont overlap at the origion it is faster:
// translate([0,0,diam/2-4])#cylinder(h = 8, d = diam/10);
It renders in 0 hours, 42 minutes, 29 seconds
2015-12-06 11:09 GMT+01:00 Trygon db5765@outlook.com:
I agree with clothbot, $fn=100 appears a little excessive!
I have generally stopped using $fn, $fs & $fa since it can be hard to
determine sensible values to use and falling back to a large value for $fn
is tempting and works but is slow. I use $fe (see
http://forum.openscad.org/fe-Tolerance-based-arc-approximation-tp14212p14933.html
)
and would code as below.
Cheers,
Trygon
$fn = undef;
$fs=0.01; // very small => $fa used
$fe=0.1; // 0.1/4 for final output?
rch = 0.1;
height = 200; // 30;
diam = 35;
function fa(r)=$fn>0?360/($fn>3?$fn:3):
$fe>0?$fe<r?min(45,2acos(1-$fe/r)):45:
360/max(min(360/($fa>0.01?$fa:0.01),
2PI*r/($fs>0.01?$fs:0.01)),5);
module HoleCylinder()
cylinder(h = 100, d = diam/10, $fa=fa(diam/20));
difference() {
// outer
cylinder(h = height, d = diam, $fa=fa(diam/2));
// inner
translate([0, 0, -1])
cylinder(h = height + 2, d = diam - 4, $fa=fa((diam-4)/2));
// reduce the bottom end
translate([0, 0, -1])
cylinder(h = 10 + 1, d = diam - 2 + rch, $fa=fa((diam-2+rch)/2));
// reduce the top end
translate([0, 0, height - 10])
difference() {
cylinder(h = 10 + 1, d = diam + 1, $fa=fa((diam+1)/2));
cylinder(h = 10 + 1, d = diam - 2 - rch,
$fa=fa((diam-2-rch)/2));
}
// holes
for (i = [15:5:height-15])
for (a = [0:15:359])
translate([0, 0, i])
rotate([0, 90, a])
HoleCylinder();
}
--
View this message in context:
http://forum.openscad.org/here-s-an-interesting-one-to-speed-optimize-tp14966p14977.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
OpenSCAD mailing list
Discuss@lists.openscad.org
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
Peter,
I assume that your comment, "Your code renders in 2 hours, 4 minutes, 48
seconds on my machine.", was not with regard to the modified code I
provided? The modified code with $fe=0.1 renders in 6 minutes, 21 seconds
on my PC.
Trygon
--
View this message in context: http://forum.openscad.org/here-s-an-interesting-one-to-speed-optimize-tp14966p14985.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
I asumed jon had a reason for choosing fn=100.
2015-12-06 21:49 GMT+01:00 Trygon db5765@outlook.com:
Peter,
I assume that your comment, "Your code renders in 2 hours, 4 minutes, 48
seconds on my machine.", was not with regard to the modified code I
provided? The modified code with $fe=0.1 renders in 6 minutes, 21 seconds
on my PC.
Trygon
--
View this message in context:
http://forum.openscad.org/here-s-an-interesting-one-to-speed-optimize-tp14966p14985.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
OpenSCAD mailing list
Discuss@lists.openscad.org
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org