help extruding a a twisted surface

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help extruding a a twisted surface

trsaunders
I'm trying to produce a smooth surface that is twisted in one axis and a wedge in another.

I've got the basic form of it, but am struggling to get a solid and smooth surface between the two cylinders.

Does anyone have any suggestions?

thanks!

The attached .scad produces the result shown in the image.

Inline image 1Inline image 2

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Re: help extruding a a twisted surface

Brad Pitcher
It's expensive (time wise), but you can do an extra hull() on each pair of boxes.

---------
Brad Pitcher
Software Developer
(702)723-8255


On Mon, Aug 5, 2013 at 3:52 PM, Tom Saunders <[hidden email]> wrote:
I'm trying to produce a smooth surface that is twisted in one axis and a wedge in another.

I've got the basic form of it, but am struggling to get a solid and smooth surface between the two cylinders.

Does anyone have any suggestions?

thanks!

The attached .scad produces the result shown in the image.

Inline image 1Inline image 2

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[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566


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Re: help extruding a a twisted surface

Whosawhatsis
I call this process a "Chain-hull". I posted an example and code here: https://plus.google.com/u/0/105535247347788377245/posts/aZGXKFX1ACN

On Monday, August 5, 2013 at 3:57 PM, Brad Pitcher wrote:

It's expensive (time wise), but you can do an extra hull() on each pair of boxes.

---------
Brad Pitcher
Software Developer
(702)723-8255


On Mon, Aug 5, 2013 at 3:52 PM, Tom Saunders <[hidden email]> wrote:
I'm trying to produce a smooth surface that is twisted in one axis and a wedge in another.

I've got the basic form of it, but am struggling to get a solid and smooth surface between the two cylinders.

Does anyone have any suggestions?

thanks!

The attached .scad produces the result shown in the image.

Inline image 1Inline image 2

_______________________________________________
OpenSCAD mailing list
[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566



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Re: help extruding a a twisted surface

trsaunders
thanks for the hints, I got the result I was after with hull().

At first the bottom and top edges were jagged, then I realised I needed to perform the hull after clipping the top and bottom of the faces, rather than the other way around.

Inline image 1


On Tue, Aug 6, 2013 at 7:35 AM, whosawhatsis <[hidden email]> wrote:
I call this process a "Chain-hull". I posted an example and code here: https://plus.google.com/u/0/105535247347788377245/posts/aZGXKFX1ACN

On Monday, August 5, 2013 at 3:57 PM, Brad Pitcher wrote:

It's expensive (time wise), but you can do an extra hull() on each pair of boxes.

---------
Brad Pitcher
Software Developer
<a href="tel:%28702%29723-8255" value="+17027238255" target="_blank">(702)723-8255


On Mon, Aug 5, 2013 at 3:52 PM, Tom Saunders <[hidden email]> wrote:
I'm trying to produce a smooth surface that is twisted in one axis and a wedge in another.

I've got the basic form of it, but am struggling to get a solid and smooth surface between the two cylinders.

Does anyone have any suggestions?

thanks!

The attached .scad produces the result shown in the image.

Inline image 1Inline image 2

_______________________________________________
OpenSCAD mailing list
[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566



_______________________________________________
OpenSCAD mailing list
[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566


_______________________________________________
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[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566

result2.png (23K) Download Attachment
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Re: help extruding a a twisted surface

Brad Pitcher
Beautiful part, thanks for sharing.

---------
Brad Pitcher


On Tue, Aug 6, 2013 at 1:42 PM, Tom Saunders <[hidden email]> wrote:
thanks for the hints, I got the result I was after with hull().

At first the bottom and top edges were jagged, then I realised I needed to perform the hull after clipping the top and bottom of the faces, rather than the other way around.

Inline image 1


On Tue, Aug 6, 2013 at 7:35 AM, whosawhatsis <[hidden email]> wrote:
I call this process a "Chain-hull". I posted an example and code here: https://plus.google.com/u/0/105535247347788377245/posts/aZGXKFX1ACN

On Monday, August 5, 2013 at 3:57 PM, Brad Pitcher wrote:

It's expensive (time wise), but you can do an extra hull() on each pair of boxes.

---------
Brad Pitcher
Software Developer
<a href="tel:%28702%29723-8255" value="+17027238255" target="_blank">(702)723-8255


On Mon, Aug 5, 2013 at 3:52 PM, Tom Saunders <[hidden email]> wrote:
I'm trying to produce a smooth surface that is twisted in one axis and a wedge in another.

I've got the basic form of it, but am struggling to get a solid and smooth surface between the two cylinders.

Does anyone have any suggestions?

thanks!

The attached .scad produces the result shown in the image.

Inline image 1Inline image 2

_______________________________________________
OpenSCAD mailing list
[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566



_______________________________________________
OpenSCAD mailing list
[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566


_______________________________________________
OpenSCAD mailing list
[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566


_______________________________________________
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[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
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Re: help extruding a a twisted surface

trsaunders
Thanks, it's for a filament spool, I hope to publish the designs soon! just need to tidy up the variables to make it easier to adjust the size.

OpenSCAD prooved a very useful tool for the job


On Tue, Aug 6, 2013 at 9:45 PM, Brad Pitcher <[hidden email]> wrote:
Beautiful part, thanks for sharing.

---------
Brad Pitcher


On Tue, Aug 6, 2013 at 1:42 PM, Tom Saunders <[hidden email]> wrote:
thanks for the hints, I got the result I was after with hull().

At first the bottom and top edges were jagged, then I realised I needed to perform the hull after clipping the top and bottom of the faces, rather than the other way around.

Inline image 1


On Tue, Aug 6, 2013 at 7:35 AM, whosawhatsis <[hidden email]> wrote:
I call this process a "Chain-hull". I posted an example and code here: https://plus.google.com/u/0/105535247347788377245/posts/aZGXKFX1ACN

On Monday, August 5, 2013 at 3:57 PM, Brad Pitcher wrote:

It's expensive (time wise), but you can do an extra hull() on each pair of boxes.

---------
Brad Pitcher
Software Developer
<a href="tel:%28702%29723-8255" value="+17027238255" target="_blank">(702)723-8255


On Mon, Aug 5, 2013 at 3:52 PM, Tom Saunders <[hidden email]> wrote:
I'm trying to produce a smooth surface that is twisted in one axis and a wedge in another.

I've got the basic form of it, but am struggling to get a solid and smooth surface between the two cylinders.

Does anyone have any suggestions?

thanks!

The attached .scad produces the result shown in the image.

Inline image 1Inline image 2

_______________________________________________
OpenSCAD mailing list
[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566



_______________________________________________
OpenSCAD mailing list
[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566


_______________________________________________
OpenSCAD mailing list
[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566


_______________________________________________
OpenSCAD mailing list
[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566


_______________________________________________
OpenSCAD mailing list
[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566

spool.png (76K) Download Attachment
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Re: help extruding a a twisted surface

Peter Falke
Nice design!
How did you come up with that?

Thanks for sharing,

TakeItAndRun


On 6 August 2013 23:41, Tom Saunders <[hidden email]> wrote:
Thanks, it's for a filament spool, I hope to publish the designs soon! just need to tidy up the variables to make it easier to adjust the size.

OpenSCAD prooved a very useful tool for the job


On Tue, Aug 6, 2013 at 9:45 PM, Brad Pitcher <[hidden email]> wrote:
Beautiful part, thanks for sharing.

---------
Brad Pitcher


On Tue, Aug 6, 2013 at 1:42 PM, Tom Saunders <[hidden email]> wrote:
thanks for the hints, I got the result I was after with hull().

At first the bottom and top edges were jagged, then I realised I needed to perform the hull after clipping the top and bottom of the faces, rather than the other way around.

Inline image 1


On Tue, Aug 6, 2013 at 7:35 AM, whosawhatsis <[hidden email]> wrote:
I call this process a "Chain-hull". I posted an example and code here: https://plus.google.com/u/0/105535247347788377245/posts/aZGXKFX1ACN

On Monday, August 5, 2013 at 3:57 PM, Brad Pitcher wrote:

It's expensive (time wise), but you can do an extra hull() on each pair of boxes.

---------
Brad Pitcher
Software Developer
<a href="tel:%28702%29723-8255" value="+17027238255" target="_blank">(702)723-8255


On Mon, Aug 5, 2013 at 3:52 PM, Tom Saunders <[hidden email]> wrote:
I'm trying to produce a smooth surface that is twisted in one axis and a wedge in another.

I've got the basic form of it, but am struggling to get a solid and smooth surface between the two cylinders.

Does anyone have any suggestions?

thanks!

The attached .scad produces the result shown in the image.

Inline image 1Inline image 2

_______________________________________________
OpenSCAD mailing list
[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566



_______________________________________________
OpenSCAD mailing list
[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566


_______________________________________________
OpenSCAD mailing list
[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566


_______________________________________________
OpenSCAD mailing list
[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566


_______________________________________________
OpenSCAD mailing list
[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566



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