Fillet
To enhance my OpenSCAD skills, I attempted on of the Reddit CAD challenges.
They provide a drawing and you need to model the part.
Here’s what I came up with
The only thing I haven’t figured out is how to place the fillet on the intersection of the vertical and horizontal tubes.
I would appreciate any comments on my design and in particular a solution to the fillet.
Mark
I would try Bosl2's join_prism() to do the fillet.
On Fri, Jan 10, 2025, 8:03 PM Mark Erbaugh via Discuss <
discuss@lists.openscad.org> wrote:
To enhance my OpenSCAD skills, I attempted on of the Reddit CAD challenges.
They provide a drawing and you need to model the part.
Here’s what I came up with
The only thing I haven’t figured out is how to place the fillet on the
intersection of the vertical and horizontal tubes.
I would appreciate any comments on my design and in particular a solution
to the fillet.
Mark_______________________________________________
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org
It's a little difficult to go line by line and understand the code written
by you (At Least for me).
I appreciate the final outcome from your code though.
I would suggest you learn to write models through points in space, create
meshes and use module polyhedron to render the final model.
The sooner you can do that the better.
For creating fillets, you need to to find intersection points between the 2
solids.That would need some work.
Getting the fillets from primitives in openSCAD is extremely difficult as
per my understanding.
Good luck
On Sat, 11 Jan 2025 at 07:33, Mark Erbaugh via Discuss <
discuss@lists.openscad.org> wrote:
To enhance my OpenSCAD skills, I attempted on of the Reddit CAD challenges.
They provide a drawing and you need to model the part.
Here’s what I came up with
The only thing I haven’t figured out is how to place the fillet on the
intersection of the vertical and horizontal tubes.
I would appreciate any comments on my design and in particular a solution
to the fillet.
Mark_______________________________________________
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org
"learn to write models through points in space, create meshes ... The
sooner you can do that the better."
Our goals are opposite. Languages like OpenSCAD are useful to me
EXACTLY because I do not have to create meshes by hand.
On 1/12/2025 4:32 AM, Sanjeev Prabhakar via Discuss wrote:
It's a little difficult to go line by line and understand the code
written by you (At Least for me).
I appreciate the final outcome from your code though.
I would suggest you learn to write models through points in space,
create meshes and use module polyhedron to render the final model.
The sooner you can do that the better.
For creating fillets, you need to to find intersection points between
the 2 solids.That would need some work.
Getting the fillets from primitives in openSCAD is extremely difficult
as per my understanding.
Good luck
On Sat, 11 Jan 2025 at 07:33, Mark Erbaugh via Discuss
discuss@lists.openscad.org wrote:
To enhance my OpenSCAD skills, I attempted on of the Reddit CAD
challenges.
They provide a drawing and you need to model the part.
Here’s what I came up with
The only thing I haven’t figured out is how to place the fillet on
the intersection of the vertical and horizontal tubes.
I would appreciate any comments on my design and in particular a
solution to the fillet.
Mark_______________________________________________
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org
OpenSCAD mailing list
To unsubscribe send an email todiscuss-leave@lists.openscad.org
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First,
Thanks for the replies.
The method I used was to do as much in 2D and then rotate_extruded that into 3D. In both modules top() (vertical piece) and side() (horizontal piece) the outline array and polygon() creates a 2D outline of one side of the cross-section of the pipe with flange. The fillet module adds a 2d fillet under the flange. The polygons are created in the XY plane with the flange on the X axis and will be translated and rotated into the final position. Since the horizontal piece is symmetrical around the Y axis (which is the X axis before rotation), the polygon only creates half and that is mirrored.
After the rotate extrude, the hole for the other pipe is added as are the bolt holes. The two pieces are then rotated and translated so that the intersection is at the origin and the two pieces are joined() with a union.
I’m not sure I fully understand the comment of creating meshes from polyhedra. I thought that was the purpose of OpenSCAD.
Mark
On Jan 12, 2025, at 7:53 AM, Jon Bondy jon@jonbondy.com wrote:
"learn to write models through points in space, create meshes ... The sooner you can do that the better."
Our goals are opposite. Languages like OpenSCAD are useful to me EXACTLY because I do not have to create meshes by hand.
On 1/12/2025 4:32 AM, Sanjeev Prabhakar via Discuss wrote:
It's a little difficult to go line by line and understand the code written by you (At Least for me).
I appreciate the final outcome from your code though.
I would suggest you learn to write models through points in space, create meshes and use module polyhedron to render the final model.
The sooner you can do that the better.
For creating fillets, you need to to find intersection points between the 2 solids.That would need some work.
Getting the fillets from primitives in openSCAD is extremely difficult as per my understanding.
Good luck
On Sat, 11 Jan 2025 at 07:33, Mark Erbaugh via Discuss <discuss@lists.openscad.org mailto:discuss@lists.openscad.org> wrote:
To enhance my OpenSCAD skills, I attempted on of the Reddit CAD challenges.
They provide a drawing and you need to model the part.
Here’s what I came up with
The only thing I haven’t figured out is how to place the fillet on the intersection of the vertical and horizontal tubes.
I would appreciate any comments on my design and in particular a solution to the fillet.
Mark_______________________________________________
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org mailto:discuss-leave@lists.openscad.org
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org mailto:discuss-leave@lists.openscad.org
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Taking Todd Allen's suggestion, here is amended .scad, adding the fillet in
BOSL2. I've marked the additional source code lines with '// add' to make
them easier to see.
On Fri, Jan 10, 2025 at 7:11 PM Todd Allen via Discuss <
discuss@lists.openscad.org> wrote:
I would try Bosl2's join_prism() to do the fillet.
On Fri, Jan 10, 2025, 8:03 PM Mark Erbaugh via Discuss <
discuss@lists.openscad.org> wrote:
To enhance my OpenSCAD skills, I attempted on of the Reddit CAD
challenges.
They provide a drawing and you need to model the part.
Here’s what I came up with
The only thing I haven’t figured out is how to place the fillet on the
intersection of the vertical and horizontal tubes.
I would appreciate any comments on my design and in particular a solution
to the fillet.
Mark_______________________________________________
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
David,
Thanks.
I’ll put learning BOSL2 on my todo list. I already had it installed and your script worked fine.
Mark
On Jan 12, 2025, at 10:47 AM, David Phillip Oster via Discuss discuss@lists.openscad.org wrote:
Taking Todd Allen's suggestion, here is amended .scad, adding the fillet in BOSL2. I've marked the additional source code lines with '// add' to make them easier to see.
On Fri, Jan 10, 2025 at 7:11 PM Todd Allen via Discuss <discuss@lists.openscad.org mailto:discuss@lists.openscad.org> wrote:
I would try Bosl2's join_prism() to do the fillet.
On Fri, Jan 10, 2025, 8:03 PM Mark Erbaugh via Discuss <discuss@lists.openscad.org mailto:discuss@lists.openscad.org> wrote:
To enhance my OpenSCAD skills, I attempted on of the Reddit CAD challenges.
They provide a drawing and you need to model the part.
Here’s what I came up with
The only thing I haven’t figured out is how to place the fillet on the intersection of the vertical and horizontal tubes.
I would appreciate any comments on my design and in particular a solution to the fillet.
Mark_______________________________________________
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org mailto:discuss-leave@lists.openscad.org
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org mailto:discuss-leave@lists.openscad.org
<Challenge 11-fillet.scad>_______________________________________________
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org
OK, just for a simple example of creating a cube
consider the following code. 'swp' is a module which creates the mesh from
the points.
p0: is a square in x-y plane
p1: is a square translated to 10 units in z-direction.
you can play around with the coordinates in p0 and p1 to see different
shapes
p0=[[0,0,0],[10,0,0],[10,10,0],[0,10,0]];
p1=[[0,0,10],[10,0,10],[10,10,10],[0,10,10]];
cube_1=[p0,p1];
swp(cube_1);
function faces(sol)=
// calculate the faces for the vertices with shape l x m with first and
the last end closed
let(
l=len(sol),
m=len(sol[0]),
n1=[for(i=[0:m-1])i],
n2=[for(i=[0:l-2]) each ([ for(j=[0:m-1])
each
j<m-1?[[(j+1)+im,j+im,j+(i+1)m],[(j+1)+im,j+(i+1)m,(j+1)+(i+1)m]]:
[[0+im,j+im,j+(i+1)m],[0+im,j+(i+1)*m,0+(i+1)*m]]
])],
n3=[for(i=[0:m-1])i+(l-1)*m],
n4=[for(i=[len(n3)-1:-1:0])n3[i]],
n=[n1,each (n2),n4]
)n;
function faces_1(sol)=
// calculate the faces for the vertices with shape l x m with first and
the last end open
let(
l=len(sol),
m=len(sol[0]),
n2=[for(i=[0:l-2])each([ for(j=[0:m-1])
each
j<m-1?[[(j+1)+im,j+im,j+(i+1)m],[(j+1)+im,j+(i+1)m,(j+1)+(i+1)m]]:
[[0+im,j+im,j+(i+1)m],[0+im,j+(i+1)*m,0+(i+1)*m]]
])]
)n2;
function vertices(sol)=
[each for (p=sol)p];
// module for rendering the polyhedron with ends closed
module swp(sol){
let(
v1=vertices(sol),
f1=faces(sol)
)
polyhedron(v1,f1,convexity=10);
}
On Sun, 12 Jan 2025 at 21:51, Mark Erbaugh via Discuss <
discuss@lists.openscad.org> wrote:
First,
Thanks for the replies.
The method I used was to do as much in 2D and then rotate_extruded that
into 3D. In both modules top() (vertical piece) and side() (horizontal
piece) the outline array and polygon() creates a 2D outline of one side of
the cross-section of the pipe with flange. The fillet module adds a 2d
fillet under the flange. The polygons are created in the XY plane with the
flange on the X axis and will be translated and rotated into the final
position. Since the horizontal piece is symmetrical around the Y axis
(which is the X axis before rotation), the polygon only creates half and
that is mirrored.
After the rotate extrude, the hole for the other pipe is added as are the
bolt holes. The two pieces are then rotated and translated so that the
intersection is at the origin and the two pieces are joined() with a union.
I’m not sure I fully understand the comment of creating meshes from
polyhedra. I thought that was the purpose of OpenSCAD.
Mark
On Jan 12, 2025, at 7:53 AM, Jon Bondy jon@jonbondy.com wrote:
"learn to write models through points in space, create meshes ... The
sooner you can do that the better."
Our goals are opposite. Languages like OpenSCAD are useful to me EXACTLY
because I do not have to create meshes by hand.
On 1/12/2025 4:32 AM, Sanjeev Prabhakar via Discuss wrote:
It's a little difficult to go line by line and understand the code written
by you (At Least for me).
I appreciate the final outcome from your code though.
I would suggest you learn to write models through points in space, create
meshes and use module polyhedron to render the final model.
The sooner you can do that the better.
For creating fillets, you need to to find intersection points between the
2 solids.That would need some work.
Getting the fillets from primitives in openSCAD is extremely difficult as
per my understanding.
Good luck
On Sat, 11 Jan 2025 at 07:33, Mark Erbaugh via Discuss <
discuss@lists.openscad.org> wrote:
To enhance my OpenSCAD skills, I attempted on of the Reddit CAD
challenges.
They provide a drawing and you need to model the part.
Here’s what I came up with
The only thing I haven’t figured out is how to place the fillet on the
intersection of the vertical and horizontal tubes.
I would appreciate any comments on my design and in particular a solution
to the fillet.
Mark_______________________________________________
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
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Useful bit of script, Sanjeev. Makes construction of some polyhedra simple.
On 12/01/2025 17:00, Sanjeev Prabhakar via Discuss wrote:
OK, just for a simple example of creating a cube
consider the following code. 'swp' is a module which creates the mesh
from the points.
p0: is a square in x-y plane
p1: is a square translated to 10 units in z-direction.
you can play around with the coordinates in p0 and p1 to see different
shapes
p0=[[0,0,0],[10,0,0],[10,10,0],[0,10,0]];
p1=[[0,0,10],[10,0,10],[10,10,10],[0,10,10]];
cube_1=[p0,p1];
swp(cube_1);
function faces(sol)=
// calculate the faces for the vertices with shape l x m with first
and the last end closed
let(
l=len(sol),
m=len(sol[0]),
n1=[for(i=[0:m-1])i],
n2=[for(i=[0:l-2]) each ([ for(j=[0:m-1])
each
j<m-1?[[(j+1)+im,j+im,j+(i+1)m],[(j+1)+im,j+(i+1)m,(j+1)+(i+1)m]]:
[[0+im,j+im,j+(i+1)m],[0+im,j+(i+1)*m,0+(i+1)*m]]
])],
n3=[for(i=[0:m-1])i+(l-1)*m],
n4=[for(i=[len(n3)-1:-1:0])n3[i]],
n=[n1,each (n2),n4]
)n;
function faces_1(sol)=
// calculate the faces for the vertices with shape l x m with first
and the last end open
let(
l=len(sol),
m=len(sol[0]),
n2=[for(i=[0:l-2])each([ for(j=[0:m-1])
each
j<m-1?[[(j+1)+im,j+im,j+(i+1)m],[(j+1)+im,j+(i+1)m,(j+1)+(i+1)m]]:
[[0+im,j+im,j+(i+1)m],[0+im,j+(i+1)*m,0+(i+1)*m]]
])]
)n2;
function vertices(sol)=
[each for (p=sol)p];
// module for rendering the polyhedron with ends closed
module swp(sol){
let(
v1=vertices(sol),
f1=faces(sol)
)
polyhedron(v1,f1,convexity=10);
}
On Sun, 12 Jan 2025 at 21:51, Mark Erbaugh via Discuss
discuss@lists.openscad.org wrote:
First,
Thanks for the replies.
The method I used was to do as much in 2D and then rotate_extruded
that into 3D. In both modules top() (vertical piece) and side()
(horizontal piece) the outline array and polygon() creates a 2D
outline of one side of the cross-section of the pipe with flange.
The fillet module adds a 2d fillet under the flange. The polygons
are created in the XY plane with the flange on the X axis and will
be translated and rotated into the final position. Since the
horizontal piece is symmetrical around the Y axis (which is the X
axis before rotation), the polygon only creates half and that is
mirrored.
After the rotate extrude, the hole for the other pipe is added as
are the bolt holes. The two pieces are then rotated and translated
so that the intersection is at the origin and the two pieces are
joined() with a union.
I’m not sure I fully understand the comment of creating meshes
from polyhedra. I thought that was the purpose of OpenSCAD.
Mark
On Jan 12, 2025, at 7:53 AM, Jon Bondy <jon@jonbondy.com> wrote:
"learn to write models through points in space, create meshes ...
The sooner you can do that the better."
Our goals are opposite. Languages like OpenSCAD are useful to me
EXACTLY because I do not have to create meshes by hand.
On 1/12/2025 4:32 AM, Sanjeev Prabhakar via Discuss wrote:
It's a little difficult to go line by line and understand the
code written by you (At Least for me).
I appreciate the final outcome from your code though.
I would suggest you learn to write models through points in
space, create meshes and use module polyhedron to render the
final model.
The sooner you can do that the better.
For creating fillets, you need to to find intersection points
between the 2 solids.That would need some work.
Getting the fillets from primitives in openSCAD is
extremely difficult as per my understanding.
Good luck
On Sat, 11 Jan 2025 at 07:33, Mark Erbaugh via Discuss
<discuss@lists.openscad.org> wrote:
To enhance my OpenSCAD skills, I attempted on of the Reddit
CAD challenges.
They provide a drawing and you need to model the part.
Here’s what I came up with
The only thing I haven’t figured out is how to place the
fillet on the intersection of the vertical and horizontal tubes.
I would appreciate any comments on my design and in
particular a solution to the fillet.
Mark_______________________________________________
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org
_______________________________________________
OpenSCAD mailing list
To unsubscribe send an email todiscuss-leave@lists.openscad.org
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I ran the code in OpenSCAD, but how is that different from a simple cube(10); which is a lot easier to type and understand?
Is this what OpenSCAD’s cube() does under the hood? Is that how more complex shapes are generated by BOSL2?
I asked a question on this forum a while back about using multmatrix to combine a series of rotate(), scale() and translate() calls into a single transformation, thinking that it might be quicker if those calls were done many times in a script and the answer was that OpenSCAD combines those calls, and computes one matrix and uses the matrix in its calculations. So I’m thinking that if OpenSCAD has a module to do it, that module should be used.
This raises a question: are the routines in OpenSCAD written in a lower level OpenSCAD or do they go to a lower level language, such as C(++).
Mark
On Jan 12, 2025, at 12:00 PM, Sanjeev Prabhakar sprabhakar2006@gmail.com wrote:
p0=[[0,0,0],[10,0,0],[10,10,0],[0,10,0]];
p1=[[0,0,10],[10,0,10],[10,10,10],[0,10,10]];
cube_1=[p0,p1];
swp(cube_1);
function faces(sol)=
// calculate the faces for the vertices with shape l x m with first and the last end closed
let(
l=len(sol),
m=len(sol[0]),
n1=[for(i=[0:m-1])i],
n2=[for(i=[0:l-2]) each ([ for(j=[0:m-1])
each
j<m-1?[[(j+1)+im,j+im,j+(i+1)m],[(j+1)+im,j+(i+1)m,(j+1)+(i+1)m]]:
[[0+im,j+im,j+(i+1)m],[0+im,j+(i+1)*m,0+(i+1)*m]]
])],
n3=[for(i=[0:m-1])i+(l-1)*m],
n4=[for(i=[len(n3)-1:-1:0])n3[i]],
n=[n1,each (n2),n4]
)n;
function faces_1(sol)=
// calculate the faces for the vertices with shape l x m with first and the last end open
let(
l=len(sol),
m=len(sol[0]),
n2=[for(i=[0:l-2])each([ for(j=[0:m-1])
each
j<m-1?[[(j+1)+im,j+im,j+(i+1)m],[(j+1)+im,j+(i+1)m,(j+1)+(i+1)m]]:
[[0+im,j+im,j+(i+1)m],[0+im,j+(i+1)*m,0+(i+1)*m]]
])]
)n2;
function vertices(sol)=
[each for (p=sol)p];
// module for rendering the polyhedron with ends closed
module swp(sol){
let(
v1=vertices(sol),
f1=faces(sol)
)
polyhedron(v1,f1,convexity=10);
}