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I

icewater

Wed, Nov 16, 2016 9:28 PM

I need to cut a piece off a cube diagonally in the Z dimension:

http://i.imgur.com/iqqDdvD.jpg

What's the best way to do this?

Thanks!

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I need to cut a piece off a cube diagonally in the Z dimension: http://i.imgur.com/iqqDdvD.jpg What's the best way to do this? Thanks! -- View this message in context: http://forum.openscad.org/Cut-a-solid-Or-extrude-2D-3D-tp19164.html Sent from the OpenSCAD mailing list archive at Nabble.com.

RP

Ronaldo Persiano

Wed, Nov 16, 2016 10:01 PM

You may do it by difference or intersection with another bigger cube.Or by
linear_extrude of a polygon.

https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/CSG_Modelling

https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Using_the_2D_Subsystem#Linear_Extrude

2016-11-16 19:28 GMT-02:00 icewater a.opsc@icewater.org:

I need to cut a piece off a cube diagonally in the Z dimension:

http://i.imgur.com/iqqDdvD.jpg

What's the best way to do this?

Thanks!

--
View this message in context: http://forum.openscad.org/Cut-
a-solid-Or-extrude-2D-3D-tp19164.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

You may do it by difference or intersection with another bigger cube.Or by linear_extrude of a polygon. https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/CSG_Modelling https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Using_the_2D_Subsystem#Linear_Extrude 2016-11-16 19:28 GMT-02:00 icewater <a.opsc@icewater.org>: > I need to cut a piece off a cube diagonally in the Z dimension: > > http://i.imgur.com/iqqDdvD.jpg > > What's the best way to do this? > > Thanks! > > > > -- > View this message in context: http://forum.openscad.org/Cut- > a-solid-Or-extrude-2D-3D-tp19164.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 >

RP

Ronaldo Persiano

Wed, Nov 16, 2016 10:03 PM

Linear_extrude is easier because you don't have to calculate angles.

P

Parkinbot

Wed, Nov 16, 2016 10:07 PM

Start with this:

p = [[0, 0], [ 2, 0], [5, 2], [5, 4], [0, 4]];
linear_extrude(height = 3) polygon(points = p);

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Start with this: > p = [[0, 0], [ 2, 0], [5, 2], [5, 4], [0, 4]]; > linear_extrude(height = 3) polygon(points = p); -- View this message in context: http://forum.openscad.org/Cut-a-solid-Or-extrude-2D-3D-tp19164p19171.html Sent from the OpenSCAD mailing list archive at Nabble.com.

JD

Jerry Davis

Sat, Nov 19, 2016 4:14 PM

use this: http://daid.eu/~daid/3d/

it is documented elsewhere on this forum.

I LOVE THIS. I use now for a whole lot of things I am doing.
I would add only 1 thing to it -- some way to insert a point into the
middle easily, but I can live with it as it is.

Jerry

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Registered Linux User: 275424
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The most exciting phrase to hear in science - the one that heralds new
discoveries - is not "Eureka!" but "That's funny...".- Isaac. Asimov

On Wed, Nov 16, 2016 at 3:07 PM, Parkinbot rudolf@parkinbot.com wrote:

Start with this:

p = [[0, 0], [ 2, 0], [5, 2], [5, 4], [0, 4]];
linear_extrude(height = 3) polygon(points = p);

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a-solid-Or-extrude-2D-3D-tp19164p19171.html
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use this: http://daid.eu/~daid/3d/ it is documented elsewhere on this forum. I LOVE THIS. I use now for a whole lot of things I am doing. I would add only 1 thing to it -- some way to insert a point into the middle easily, but I can live with it as it is. Jerry -- Extra Ham Operator: K7AZJ Registered Linux User: 275424 Raspberry Pi and Openscad developer *The most exciting phrase to hear in science - the one that heralds new discoveries - is not "Eureka!" but "That's funny...".*- Isaac. Asimov On Wed, Nov 16, 2016 at 3:07 PM, Parkinbot <rudolf@parkinbot.com> wrote: > Start with this: > > > > p = [[0, 0], [ 2, 0], [5, 2], [5, 4], [0, 4]]; > > linear_extrude(height = 3) polygon(points = p); > > > > > > -- > View this message in context: http://forum.openscad.org/Cut- > a-solid-Or-extrude-2D-3D-tp19164p19171.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 >

A

adrian

Mon, Nov 21, 2016 2:15 PM

I'm sorry, but though the concept sounds good, the implementation doesn't
work. Very disappointed that it can't take in the sample:

polygon([[0,0], [0,1], [1,1], [1,0]]);

and work. At first I got nothing and then I got a square that was at the
origin. SMH

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I'm sorry, but though the concept sounds good, the implementation doesn't work. Very disappointed that it can't take in the sample: polygon([[0,0], [0,1], [1,1], [1,0]]); and work. At first I got nothing and then I got a square that was at the origin. SMH -- View this message in context: http://forum.openscad.org/Cut-a-solid-Or-extrude-2D-3D-tp19164p19286.html Sent from the OpenSCAD mailing list archive at Nabble.com.

R

Ronaldo

Mon, Nov 21, 2016 2:39 PM

This polygon is a square! Parkinbot's proposal is exactly what you have drawn
in the graph paper.

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This polygon is a square! Parkinbot's proposal is exactly what you have drawn in the graph paper. -- View this message in context: http://forum.openscad.org/Cut-a-solid-Or-extrude-2D-3D-tp19164p19287.html Sent from the OpenSCAD mailing list archive at Nabble.com.

A

adrian

Mon, Nov 21, 2016 5:37 PM

The square that I saw was centred around the origin. That isn't what I
specified. Also the controls didn't seem to do anything except hide and
show other controls.

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The square that I saw was centred around the origin. That isn't what I specified. Also the controls didn't seem to do anything except hide and show other controls. -- View this message in context: http://forum.openscad.org/Cut-a-solid-Or-extrude-2D-3D-tp19164p19293.html Sent from the OpenSCAD mailing list archive at Nabble.com.

A

adrian

Mon, Nov 21, 2016 5:40 PM

Here is an example using different points that do not resemble a square:

http://forum.openscad.org/file/n19294/polygon-editor-wrong.png

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Here is an example using different points that do not resemble a square: <http://forum.openscad.org/file/n19294/polygon-editor-wrong.png> -- View this message in context: http://forum.openscad.org/Cut-a-solid-Or-extrude-2D-3D-tp19164p19294.html Sent from the OpenSCAD mailing list archive at Nabble.com.

TP

Torsten Paul

Mon, Nov 21, 2016 7:22 PM

On 11/21/2016 06:40 PM, adrian wrote:

Here is an example using different points that do not
resemble a square:

Are you blocking some scripts maybe? This example works fine
for me (in both Firefox and Chrome).

http://i.imgur.com/G6hMcFt.png

ciao,
Torsten.

On 11/21/2016 06:40 PM, adrian wrote: > Here is an example using different points that do not > resemble a square: > Are you blocking some scripts maybe? This example works fine for me (in both Firefox and Chrome). http://i.imgur.com/G6hMcFt.png ciao, Torsten.

discuss@lists.openscad.org

Cut a solid? Or extrude 2D->3D ?