Hi,

Guest

SL

Steve Lelievre

Thu, Jan 19, 2023 4:49 PM

Terry,

If you go with your second option of using the plywood plate with a

cut-out, then this code should help. You would add a straight cylinder

at the top to form your push-in attachment, and a lugs with screw holes

at the bottom for fixing the plywood.

Cheers,

Steve

module funnel(h, d, x, y) {

// Makes a solid shape that is a rectangle at one end and a circle

at the other.

// Could easily be adapted for shaping any regular polygon to any

other regular polygon.

// h: transition height, d: diameter of circular end, x: x-dimension

(length) of rectangular end, y: y-dimension (width) of rectangular end.

hull() {

resize([d, d, h]) cylinder(h = 1, d1 = 0, d2 = 1, $fn =

60); // inverted cone

resize([x, y, h]) rotate(45) cylinder(h = 1, d1 = 1, d2 = 0, $fn

= 4); // cone with 4 sides: pyramid

}

}

// Example with additional use of multmatrix to shear the funnel shape

so that the top is off-centre.

height = 20; diameter = 15; length = 40; width = 30; wall = 2; xOffset

= 10; yOffset = 7;

shear = [[1, 0, xOffset / height], [0, 1, yOffset / height]];

difference() {

multmatrix(shear) funnel(height, diameter + wall, length + wall,

width + wall);

multmatrix(shear) funnel(height, diameter, length, width);

}

On 2023-01-19 8:06 a.m., fred via Discuss wrote:

Terry,
If you go with your second option of using the plywood plate with a
cut-out, then this code should help. You would add a straight cylinder
at the top to form your push-in attachment, and a lugs with screw holes
at the bottom for fixing the plywood.
Cheers,
Steve
module funnel(h, d, x, y) {
// Makes a solid shape that is a rectangle at one end and a circle
at the other.
// Could easily be adapted for shaping any regular polygon to any
other regular polygon.
// h: transition height, d: diameter of circular end, x: x-dimension
(length) of rectangular end, y: y-dimension (width) of rectangular end.
hull() {
resize([d, d, h]) cylinder(h = 1, d1 = 0, d2 = 1, $fn =
60); // inverted cone
resize([x, y, h]) rotate(45) cylinder(h = 1, d1 = 1, d2 = 0, $fn
= 4); // cone with 4 sides: pyramid
}
}
// Example with additional use of multmatrix to shear the funnel shape
so that the top is off-centre.
height = 20; diameter = 15; length = 40; width = 30; wall = 2; xOffset
= 10; yOffset = 7;
shear = [[1, 0, xOffset / height], [0, 1, yOffset / height]];
difference() {
multmatrix(shear) funnel(height, diameter + wall, length + wall,
width + wall);
multmatrix(shear) funnel(height, diameter, length, width);
}
On 2023-01-19 8:06 a.m., fred via Discuss wrote:
> _______________________________________________
> OpenSCAD mailing list
> To unsubscribe send an email to discuss-leave@lists.openscad.org

T

Terry

Thu, Jan 19, 2023 5:13 PM

Thanks Steve, that would be handy because I expect I do have some

aluminium or plastic tubing that would be the right diameter for my

hose - but my hole cutters are unlikely to match it.

Did it preview OK for you? I took the first section and pasted it into a

new file, but then had various problems with EOLs. With those fixed(I

think) the following gave me: WARNING: No top level geometry to render.

module funnel(h, d, x, y) {

// Makes a solid shape that is a rectangle at one end and a circle at

the other.

// Could easily be adapted for shaping any regular polygon to any other

regular polygon.

// h: transition height, d: diameter of circular end, x: x-dimension

//(length) of rectangular end, y: y-dimension (width) of rectangular

end.

hull() {

resize([d, d, h]) cylinder(h = 1, d1 = 0, d2 = 1, $fn = 60);

// inverted cone

resize([x, y, h]) rotate(45) cylinder(h = 1, d1 = 1, d2 = 0, $fn = 4);

// cone with 4 sides: pyramid

}

}

On Thu, 19 Jan 2023 08:49:28 -0800, you wrote:

Terry,

If you go with your second option of using the plywood plate with a

cut-out, then this code should help. You would add a straight cylinder

at the top to form your push-in attachment, and a lugs with screw holes

at the bottom for fixing the plywood.

Cheers,

Steve

module funnel(h, d, x, y) {

// Makes a solid shape that is a rectangle at one end and a circle

at the other.

// Could easily be adapted for shaping any regular polygon to any

other regular polygon.

// h: transition height, d: diameter of circular end, x: x-dimension

(length) of rectangular end, y: y-dimension (width) of rectangular end.

hull() {

resize([d, d, h]) cylinder(h = 1, d1 = 0, d2 = 1, $fn =

60); // inverted cone

resize([x, y, h]) rotate(45) cylinder(h = 1, d1 = 1, d2 = 0, $fn

= 4); // cone with 4 sides: pyramid

}

}

// Example with additional use of multmatrix to shear the funnel shape

so that the top is off-centre.

height = 20; diameter = 15; length = 40; width = 30; wall = 2; xOffset

= 10; yOffset = 7;

shear = [[1, 0, xOffset / height], [0, 1, yOffset / height]];

difference() {

multmatrix(shear) funnel(height, diameter + wall, length + wall,

width + wall);

multmatrix(shear) funnel(height, diameter, length, width);

}

On 2023-01-19 8:06 a.m., fred via Discuss wrote:

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

Thanks Steve, that would be handy because I expect I do have some
aluminium or plastic tubing that would be the right diameter for my
hose - but my hole cutters are unlikely to match it.
Did it preview OK for you? I took the first section and pasted it into a
new file, but then had various problems with EOLs. With those fixed(I
think) the following gave me: WARNING: No top level geometry to render.
module funnel(h, d, x, y) {
// Makes a solid shape that is a rectangle at one end and a circle at
the other.
// Could easily be adapted for shaping any regular polygon to any other
regular polygon.
// h: transition height, d: diameter of circular end, x: x-dimension
//(length) of rectangular end, y: y-dimension (width) of rectangular
end.
hull() {
resize([d, d, h]) cylinder(h = 1, d1 = 0, d2 = 1, $fn = 60);
// inverted cone
resize([x, y, h]) rotate(45) cylinder(h = 1, d1 = 1, d2 = 0, $fn = 4);
// cone with 4 sides: pyramid
}
}
--------------------
On Thu, 19 Jan 2023 08:49:28 -0800, you wrote:
>Terry,
>
>If you go with your second option of using the plywood plate with a
>cut-out, then this code should help. You would add a straight cylinder
>at the top to form your push-in attachment, and a lugs with screw holes
>at the bottom for fixing the plywood.
>
>Cheers,
>
>Steve
>
>module funnel(h, d, x, y) {
> // Makes a solid shape that is a rectangle at one end and a circle
>at the other.
> // Could easily be adapted for shaping any regular polygon to any
>other regular polygon.
> // h: transition height, d: diameter of circular end, x: x-dimension
>(length) of rectangular end, y: y-dimension (width) of rectangular end.
> hull() {
> resize([d, d, h]) cylinder(h = 1, d1 = 0, d2 = 1, $fn =
>60); // inverted cone
> resize([x, y, h]) rotate(45) cylinder(h = 1, d1 = 1, d2 = 0, $fn
>= 4); // cone with 4 sides: pyramid
> }
>}
>
>// Example with additional use of multmatrix to shear the funnel shape
>so that the top is off-centre.
>height = 20; diameter = 15; length = 40; width = 30; wall = 2; xOffset
>= 10; yOffset = 7;
>shear = [[1, 0, xOffset / height], [0, 1, yOffset / height]];
>difference() {
> multmatrix(shear) funnel(height, diameter + wall, length + wall,
>width + wall);
> multmatrix(shear) funnel(height, diameter, length, width);
>}
>
>
>
>
>On 2023-01-19 8:06 a.m., fred via Discuss wrote:
>> _______________________________________________
>> 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

SL

Steve Lelievre

Thu, Jan 19, 2023 5:54 PM

Terry,

The EOL issue is probably from the source code being messed up when I

pasted it into an email. The lack of geometry to render is because the

first block is a module that gets called from the second part. You need

to include all the sample code to see any output.

In my first message, I forgot to point out that the example funnel

dimensions are the inner dimensions of the two ends of the funnel. You

may need to compensate for that if you're making a shape that goes over

a fitting rather than into it.

Steve

On 2023-01-19 9:13 a.m., Terry wrote:

Thanks Steve, that would be handy because I expect I do have some

aluminium or plastic tubing that would be the right diameter for my

hose - but my hole cutters are unlikely to match it.

Did it preview OK for you? I took the first section and pasted it into a

new file, but then had various problems with EOLs. With those fixed(I

think) the following gave me: WARNING: No top level geometry to render.

module funnel(h, d, x, y) {

// Makes a solid shape that is a rectangle at one end and a circle at

the other.

// Could easily be adapted for shaping any regular polygon to any other

regular polygon.

// h: transition height, d: diameter of circular end, x: x-dimension

//(length) of rectangular end, y: y-dimension (width) of rectangular

end.

hull() {

resize([d, d, h]) cylinder(h = 1, d1 = 0, d2 = 1, $fn = 60);

// inverted cone

resize([x, y, h]) rotate(45) cylinder(h = 1, d1 = 1, d2 = 0, $fn = 4);

// cone with 4 sides: pyramid

}

}

On Thu, 19 Jan 2023 08:49:28 -0800, you wrote:

Terry,

If you go with your second option of using the plywood plate with a

cut-out, then this code should help. You would add a straight cylinder

at the top to form your push-in attachment, and a lugs with screw holes

at the bottom for fixing the plywood.Cheers,

Steve

module funnel(h, d, x, y) {

// Makes a solid shape that is a rectangle at one end and a circle

at the other.

// Could easily be adapted for shaping any regular polygon to any

other regular polygon.

// h: transition height, d: diameter of circular end, x: x-dimension

(length) of rectangular end, y: y-dimension (width) of rectangular end.

hull() {

resize([d, d, h]) cylinder(h = 1, d1 = 0, d2 = 1, $fn =

60); // inverted cone

resize([x, y, h]) rotate(45) cylinder(h = 1, d1 = 1, d2 = 0, $fn

= 4); // cone with 4 sides: pyramid

}

}// Example with additional use of multmatrix to shear the funnel shape

so that the top is off-centre.

height = 20; diameter = 15; length = 40; width = 30; wall = 2; xOffset

= 10; yOffset = 7;

shear = [[1, 0, xOffset / height], [0, 1, yOffset / height]];

difference() {

multmatrix(shear) funnel(height, diameter + wall, length + wall,

width + wall);

multmatrix(shear) funnel(height, diameter, length, width);

}On 2023-01-19 8:06 a.m., fred via Discuss wrote:

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

OpenSCAD mailing list

To unsubscribe send an email to discuss-leave@lists.openscad.org

Terry,
The EOL issue is probably from the source code being messed up when I
pasted it into an email. The lack of geometry to render is because the
first block is a module that gets called from the second part. You need
to include all the sample code to see any output.
In my first message, I forgot to point out that the example funnel
dimensions are the inner dimensions of the two ends of the funnel. You
may need to compensate for that if you're making a shape that goes over
a fitting rather than into it.
Steve
On 2023-01-19 9:13 a.m., Terry wrote:
> Thanks Steve, that would be handy because I expect I do have some
> aluminium or plastic tubing that would be the right diameter for my
> hose - but my hole cutters are unlikely to match it.
>
> Did it preview OK for you? I took the first section and pasted it into a
> new file, but then had various problems with EOLs. With those fixed(I
> think) the following gave me: WARNING: No top level geometry to render.
>
> module funnel(h, d, x, y) {
> // Makes a solid shape that is a rectangle at one end and a circle at
> the other.
> // Could easily be adapted for shaping any regular polygon to any other
> regular polygon.
> // h: transition height, d: diameter of circular end, x: x-dimension
> //(length) of rectangular end, y: y-dimension (width) of rectangular
> end.
> hull() {
> resize([d, d, h]) cylinder(h = 1, d1 = 0, d2 = 1, $fn = 60);
> // inverted cone
> resize([x, y, h]) rotate(45) cylinder(h = 1, d1 = 1, d2 = 0, $fn = 4);
> // cone with 4 sides: pyramid
> }
> }
>
> --------------------
>
>
> On Thu, 19 Jan 2023 08:49:28 -0800, you wrote:
>
>> Terry,
>>
>> If you go with your second option of using the plywood plate with a
>> cut-out, then this code should help. You would add a straight cylinder
>> at the top to form your push-in attachment, and a lugs with screw holes
>> at the bottom for fixing the plywood.
>>
>> Cheers,
>>
>> Steve
>>
>> module funnel(h, d, x, y) {
>> // Makes a solid shape that is a rectangle at one end and a circle
>> at the other.
>> // Could easily be adapted for shaping any regular polygon to any
>> other regular polygon.
>> // h: transition height, d: diameter of circular end, x: x-dimension
>> (length) of rectangular end, y: y-dimension (width) of rectangular end.
>> hull() {
>> resize([d, d, h]) cylinder(h = 1, d1 = 0, d2 = 1, $fn =
>> 60); // inverted cone
>> resize([x, y, h]) rotate(45) cylinder(h = 1, d1 = 1, d2 = 0, $fn
>> = 4); // cone with 4 sides: pyramid
>> }
>> }
>>
>> // Example with additional use of multmatrix to shear the funnel shape
>> so that the top is off-centre.
>> height = 20; diameter = 15; length = 40; width = 30; wall = 2; xOffset
>> = 10; yOffset = 7;
>> shear = [[1, 0, xOffset / height], [0, 1, yOffset / height]];
>> difference() {
>> multmatrix(shear) funnel(height, diameter + wall, length + wall,
>> width + wall);
>> multmatrix(shear) funnel(height, diameter, length, width);
>> }
>>
>>
>>
>>
>> On 2023-01-19 8:06 a.m., fred via Discuss wrote:
>>> _______________________________________________
>>> 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
> _______________________________________________
> OpenSCAD mailing list
> To unsubscribe send an email to discuss-leave@lists.openscad.org

T

Terry

Thu, Jan 19, 2023 6:56 PM

Careless of me! Looks good now, thanks.

On Thu, 19 Jan 2023 09:54:39 -0800, you wrote:

Terry,

The EOL issue is probably from the source code being messed up when I

pasted it into an email. The lack of geometry to render is because the

first block is a module that gets called from the second part. You need

to include all the sample code to see any output.

In my first message, I forgot to point out that the example funnel

dimensions are the inner dimensions of the two ends of the funnel. You

may need to compensate for that if you're making a shape that goes over

a fitting rather than into it.

Steve

On 2023-01-19 9:13 a.m., Terry wrote:

Thanks Steve, that would be handy because I expect I do have some

aluminium or plastic tubing that would be the right diameter for my

hose - but my hole cutters are unlikely to match it.Did it preview OK for you? I took the first section and pasted it into a

new file, but then had various problems with EOLs. With those fixed(I

think) the following gave me: WARNING: No top level geometry to render.module funnel(h, d, x, y) {

// Makes a solid shape that is a rectangle at one end and a circle at

the other.

// Could easily be adapted for shaping any regular polygon to any other

regular polygon.

// h: transition height, d: diameter of circular end, x: x-dimension

//(length) of rectangular end, y: y-dimension (width) of rectangular

end.

hull() {

resize([d, d, h]) cylinder(h = 1, d1 = 0, d2 = 1, $fn = 60);

// inverted cone

resize([x, y, h]) rotate(45) cylinder(h = 1, d1 = 1, d2 = 0, $fn = 4);

// cone with 4 sides: pyramid

}

}

On Thu, 19 Jan 2023 08:49:28 -0800, you wrote:

Terry,

cut-out, then this code should help. You would add a straight cylinder

at the top to form your push-in attachment, and a lugs with screw holes

at the bottom for fixing the plywood.Cheers,

Steve

// Makes a solid shape that is a rectangle at one end and a circle

at the other.

// Could easily be adapted for shaping any regular polygon to any

other regular polygon.

// h: transition height, d: diameter of circular end, x: x-dimension

(length) of rectangular end, y: y-dimension (width) of rectangular end.

hull() {

resize([d, d, h]) cylinder(h = 1, d1 = 0, d2 = 1, $fn =

60); // inverted cone

resize([x, y, h]) rotate(45) cylinder(h = 1, d1 = 1, d2 = 0, $fn

= 4); // cone with 4 sides: pyramid

}

}

so that the top is off-centre.

height = 20; diameter = 15; length = 40; width = 30; wall = 2; xOffset

= 10; yOffset = 7;

shear = [[1, 0, xOffset / height], [0, 1, yOffset / height]];

difference() {

multmatrix(shear) funnel(height, diameter + wall, length + wall,

width + wall);

multmatrix(shear) funnel(height, diameter, length, width);

}On 2023-01-19 8:06 a.m., fred via Discuss wrote:

OpenSCAD mailing list

To unsubscribe send an email to discuss-leave@lists.openscad.org

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Careless of me! Looks good now, thanks.
--------------------
On Thu, 19 Jan 2023 09:54:39 -0800, you wrote:
>Terry,
>
>The EOL issue is probably from the source code being messed up when I
>pasted it into an email. The lack of geometry to render is because the
>first block is a module that gets called from the second part. You need
>to include all the sample code to see any output.
>
>In my first message, I forgot to point out that the example funnel
>dimensions are the inner dimensions of the two ends of the funnel. You
>may need to compensate for that if you're making a shape that goes over
>a fitting rather than into it.
>
>Steve
>
>On 2023-01-19 9:13 a.m., Terry wrote:
>> Thanks Steve, that would be handy because I expect I do have some
>> aluminium or plastic tubing that would be the right diameter for my
>> hose - but my hole cutters are unlikely to match it.
>>
>> Did it preview OK for you? I took the first section and pasted it into a
>> new file, but then had various problems with EOLs. With those fixed(I
>> think) the following gave me: WARNING: No top level geometry to render.
>>
>> module funnel(h, d, x, y) {
>> // Makes a solid shape that is a rectangle at one end and a circle at
>> the other.
>> // Could easily be adapted for shaping any regular polygon to any other
>> regular polygon.
>> // h: transition height, d: diameter of circular end, x: x-dimension
>> //(length) of rectangular end, y: y-dimension (width) of rectangular
>> end.
>> hull() {
>> resize([d, d, h]) cylinder(h = 1, d1 = 0, d2 = 1, $fn = 60);
>> // inverted cone
>> resize([x, y, h]) rotate(45) cylinder(h = 1, d1 = 1, d2 = 0, $fn = 4);
>> // cone with 4 sides: pyramid
>> }
>> }
>>
>> --------------------
>>
>>
>> On Thu, 19 Jan 2023 08:49:28 -0800, you wrote:
>>
>>> Terry,
>>>
>>> If you go with your second option of using the plywood plate with a
>>> cut-out, then this code should help. You would add a straight cylinder
>>> at the top to form your push-in attachment, and a lugs with screw holes
>>> at the bottom for fixing the plywood.
>>>
>>> Cheers,
>>>
>>> Steve
>>>
>>> module funnel(h, d, x, y) {
>>> // Makes a solid shape that is a rectangle at one end and a circle
>>> at the other.
>>> // Could easily be adapted for shaping any regular polygon to any
>>> other regular polygon.
>>> // h: transition height, d: diameter of circular end, x: x-dimension
>>> (length) of rectangular end, y: y-dimension (width) of rectangular end.
>>> hull() {
>>> resize([d, d, h]) cylinder(h = 1, d1 = 0, d2 = 1, $fn =
>>> 60); // inverted cone
>>> resize([x, y, h]) rotate(45) cylinder(h = 1, d1 = 1, d2 = 0, $fn
>>> = 4); // cone with 4 sides: pyramid
>>> }
>>> }
>>>
>>> // Example with additional use of multmatrix to shear the funnel shape
>>> so that the top is off-centre.
>>> height = 20; diameter = 15; length = 40; width = 30; wall = 2; xOffset
>>> = 10; yOffset = 7;
>>> shear = [[1, 0, xOffset / height], [0, 1, yOffset / height]];
>>> difference() {
>>> multmatrix(shear) funnel(height, diameter + wall, length + wall,
>>> width + wall);
>>> multmatrix(shear) funnel(height, diameter, length, width);
>>> }
>>>
>>>
>>>
>>>
>>> On 2023-01-19 8:06 a.m., fred via Discuss wrote:
>>>> _______________________________________________
>>>> 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
>> _______________________________________________
>> 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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