Circular shape to a square shape.
Hi, I'm new to the software and I have a question. I have a file of a
circular piece, and I would like to make it a square piece Preserving the
details, but I do not know how to make the modification. The link of the
part is down.
twisted_vase.scad http://forum.openscad.org/file/n21129/twisted_vase.scad
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I have noted in the code you provide that there is a line
faces = 8;
When that value is changed to 4, the individual "layers" of the shape become
square. Is this the answer you seek?
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Thanks for the response !
No... This is the image of the code
http://forum.openscad.org/file/n21133/Captura_de_Tela_2017-04-08_%C3%A0s_19.png
I want to know if it is possible to change the shape that is like a cup, to
something like a box, for exemple, including this special details. The
changes that you proposed, only make difference on the details.
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The "special details" part escapes me. The method used in the original
cup-type code is to rotate the basic shape (faces) which provides what I
think of as the details. If "faces = 4" is used, each layer is a square.
http://forum.openscad.org/file/n21134/cube4vase.png
If one desires a cube shaped receptacle, this code:
gives this shape:
http://forum.openscad.org/file/n21134/cubebox.png
Can you clarify what special details you seek?
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Thanks man ! I`m really a new one on openscad.
I understood that using faces = 4 then we have the image you upload, but it
is possible to have that number of "special details", that number of faces,
but this details on the sides of a box ?
I`ll tried to explain better... On this code, we have some subdivisions and
some number os "special details"
http://forum.openscad.org/file/n21135/Captura_de_Tela_2017-04-08_%C3%A0s_20.png
But, besides become a "cup" at the and, besides creates this details on a
cylinder, now create on the sides of a box, its possible ?
Thanks !
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I see that you'd like to have facets on the sides of the box. The facets in
the faces=8 are really rotations of the basic shape. When that is done with
faces=4, you get the image I provided, but I think you feel that the
variations are too great and would like to have more subtle changes to the
faces.
I'm mostly new to OpenSCAD too and not much of a programmer-thinking kind of
person. Most of my creations are simple and involve a lot of "try this,
fail, try something else."
I believe that there is someone on the list who has strong programming
skills and can create complex code to create facets on the faces of the
cube. I believe that I would have very little understanding of the code,
however.
If, for example, you desired to have one "point of facet" in the side of the
cube, I could manually create polygons, but it would be "brute force"
generation, while a more skilled user would create algorithms to accomplish
the same thing, and with more flexibility.
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make a giant version with many tiny (it its scale) facets, difference
out a piece that is the size of one box wall, if you have made the giant
version big enough it should look almost flat at the smaller scale...
use this 4 times rotated 90 degrees each time to make the four sides
check the wiki / manual etc to see how boolean geometry is used
(difference and union I abuse a lot!)
hope this is enough to get you started / learning
Chris
On 09/04/17 01:14, fred_dot_u wrote:
I see that you'd like to have facets on the sides of the box. The facets in
the faces=8 are really rotations of the basic shape. When that is done with
faces=4, you get the image I provided, but I think you feel that the
variations are too great and would like to have more subtle changes to the
faces.
I'm mostly new to OpenSCAD too and not much of a programmer-thinking kind of
person. Most of my creations are simple and involve a lot of "try this,
fail, try something else."
I believe that there is someone on the list who has strong programming
skills and can create complex code to create facets on the faces of the
cube. I believe that I would have very little understanding of the code,
however.
If, for example, you desired to have one "point of facet" in the side of the
cube, I could manually create polygons, but it would be "brute force"
generation, while a more skilled user would create algorithms to accomplish
the same thing, and with more flexibility.
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http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
Paulo,
I don't think you may reproduce that same texture pattern in the planar
surface of a block. To enlarge the circular form to make it seem locally
plane will make the texture too shallow to give the same visual effect.
The simplest way I can imagine to create planar textures is to use a texture
map with the OpenSCAD primitive surface()
https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Other_Language_Features#Surface
. The very crude example of its application in mapping texture follows as a
base point to your experiments. The commented lines at the beginning of the
code should be saved as a text file named texture.txt. It is a shame we
can't use a matrix defined in the code as input to surface().
/*
texture.txt
2 2 3 2 3 2 3 2 3 2 3 2 2
2 3 2 3 2 3 2 3 2 3 2 3 2
2 2 3 2 3 2 3 2 3 2 3 2 2
2 3 2 3 2 3 2 3 2 3 2 3 2
2 2 3 2 3 2 3 2 3 2 3 2 2
2 3 2 3 2 3 2 3 2 3 2 3 2
2 2 3 2 3 2 3 2 3 2 3 2 2
2 3 2 3 2 3 2 3 2 3 2 3 2
2 2 3 2 3 2 3 2 3 2 3 2 2
2 3 2 3 2 3 2 3 2 3 2 3 2
2 2 3 2 3 2 3 2 3 2 3 2 2
2 3 2 3 2 3 2 3 2 3 2 3 2
2 2 3 2 3 2 3 2 3 2 3 2 2
2 3 2 3 2 3 2 3 2 3 2 3 2
*/
width = 13; // # columns in texture.txt
height = 14;// # lines in texture.txt
thick = 3; // max value in texture.txt
module wall()
intersection(){
rotate(-135) translate([0,0,-height/2-1])
cube([width/sqrt(2),width/sqrt(2),height+2]);
translate([-0.01,-(width-4-thick)/2,0])
rotate([90,0,0])
surface(file="texture.txt",center=true);
}
wall();
rotate(90) wall();
rotate(180) wall();
rotate(270) wall();
http://forum.openscad.org/file/n21145/textured.png
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There is also this:
https://github.com/openscad/list-comprehension-demos#forma-candle-holderscad
..a different way of achieving smth. similar, and uses a bunch of library code, but perhaps helpful?
-Marius