dxf files
example to demonstrate my problem.
The slightly modified code
///////////////////////////////////////
module solid(){
cube(200);
cube ([150,100,300]);
cylinder(h=400,d=100);
}
//solid();
translate ([100,300,0])
projection(cut=true) translate([0,0,-50])solid();
translate ([100,600,0])
projection (cut=true)translate([0,0,-250])solid();
translate ([100,900,0])
projection (cut=true)translate([0,0,-350])solid();
/////////////////////////////////////////////////
produces the following dxf image
Whereas what I need is the shapes 'stacked' on top of each other, like this.
In openscad the 2d shapes are 'filled in', so you do not get the
separate outlines, and this stacked result is not possible within
openscad itself, afaik. I have to manually move the components in the
translated dxf file to align them, using another cad program.
Is it possible in openscad, perhaps using some command line
options/whatever, to export the dxf file, with each projection located
in the correct position, superimposed on top of each other, without
having to translate and rearrange in an external program? It becomes
tedious for more than a few projections.
As an alternative to my wanting stacked projections saved as a single
dxf, Is it possible to save as separate dxf's, programmatically?
//////////////////////////////////
module solid(){
cube(200);
cube ([150,100,300]);
cylinder(h=400,d=100);
}
//solid();
module cut(z){
projection(cut=true) translate([0,0,-z])solid();
}
//cut(150);
//cut(250);
//cut(350);
///////////////////////////
along the lines that the files would be exported as, say,
'projection150.dxf', 'projection250.dxf', and 'projection350.dxf' based
on the above example code.
Hoping that once the scad was written, is it possible to use a command
line to automate it, by something like ' whatever needed (150,250,350)
etc.' ?
If not, I think it would be quicker to manually export separate dxf's at
the various offsets , compared to moving them around in another
program. There are about a dozen offsets, not equally spaced, in my real
world problem types.
Thanks.
On 19/05/2023 16:13, Raymond West wrote:
example to demonstrate my problem.
The slightly modified code
///////////////////////////////////////
module solid(){
cube(200);
cube ([150,100,300]);
cylinder(h=400,d=100);
}
//solid();
translate ([100,300,0])
projection(cut=true) translate([0,0,-50])solid();
translate ([100,600,0])
projection (cut=true)translate([0,0,-250])solid();
translate ([100,900,0])
projection (cut=true)translate([0,0,-350])solid();
/////////////////////////////////////////////////
produces the following dxf image
Whereas what I need is the shapes 'stacked' on top of each other, like
this.
In openscad the 2d shapes are 'filled in', so you do not get the
separate outlines, and this stacked result is not possible within
openscad itself, afaik. I have to manually move the components in the
translated dxf file to align them, using another cad program.
Is it possible in openscad, perhaps using some command line
options/whatever, to export the dxf file, with each projection located
in the correct position, superimposed on top of each other, without
having to translate and rearrange in an external program? It becomes
tedious for more than a few projections.
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Why are you translating the 2D cuts? Either don’t translate, or translate
them all to the same coord. The dxf should then be what you want, iwt.
On Fri, May 19, 2023 at 13:16 Raymond West raywest@raywest.com wrote:
As an alternative to my wanting stacked projections saved as a single dxf,
Is it possible to save as separate dxf's, programmatically?
//////////////////////////////////
module solid(){
cube(200);
cube ([150,100,300]);
cylinder(h=400,d=100);
}
//solid();
module cut(z){
projection(cut=true) translate([0,0,-z])solid();
}
//cut(150);
//cut(250);
//cut(350);
///////////////////////////
along the lines that the files would be exported as, say,
'projection150.dxf', 'projection250.dxf', and 'projection350.dxf' based on
the above example code.
Hoping that once the scad was written, is it possible to use a command
line to automate it, by something like ' whatever needed (150,250,350)
etc.' ?
If not, I think it would be quicker to manually export separate dxf's at
the various offsets , compared to moving them around in another program.
There are about a dozen offsets, not equally spaced, in my real world
problem types.
Thanks.
On 19/05/2023 16:13, Raymond West wrote:
example to demonstrate my problem.
The slightly modified code
///////////////////////////////////////
module solid(){
cube(200);
cube ([150,100,300]);
cylinder(h=400,d=100);
}
//solid();
translate ([100,300,0])
projection(cut=true) translate([0,0,-50])solid();
translate ([100,600,0])
projection (cut=true)translate([0,0,-250])solid();
translate ([100,900,0])
projection (cut=true)translate([0,0,-350])solid();
/////////////////////////////////////////////////
produces the following dxf image
Whereas what I need is the shapes 'stacked' on top of each other, like
this.
In openscad the 2d shapes are 'filled in', so you do not get the separate
outlines, and this stacked result is not possible within openscad itself,
afaik. I have to manually move the components in the translated dxf file to
align them, using another cad program.
Is it possible in openscad, perhaps using some command line
options/whatever, to export the dxf file, with each projection located in
the correct position, superimposed on top of each other, without having to
translate and rearrange in an external program? It becomes tedious for more
than a few projections.
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To unsubscribe send an email to discuss-leave@lists.openscad.org
Nope. But you could more or less straightforwardly wrap a shell script
around a command line, passing -D settings in to tell the OpenSCAD
program which shape to generate and storing the results in separate DXF
files.
Just as in 3D, the shapes are unioned and their original identity is lost.
One method I have used in several models is to build in a "mode" that is
manually set for each run.
//MODE=3; // Mode 3: Generate 3d model for visualization
//MODE=2; // Mode 2: Generate 2d pattern for cutting
//MODE=0; // Mode 0: Generate 2d joined pattern for cutting
MODE=-1;
if ( MODE == 3) { // 3d visualization
// code here
} else if ( MODE >= 0) { // Generate 2d layout for lasercutting
// more code here
} else { // Generate 2d layout tops connected
// echo (str("MODE is negative"));
//MORE code HERE
You can build in a MODE or other flag that's either a number or true/false,
and based on that generate a specific part. Then you manually run your
code, changing the mode each time, and saving each as a DXF with a
different filename.
Thus Raymond West hast written on Fri, May 19, 2023 at 04:13:55PM +0100, and, according to prophecy, it shall come to pass that:
example to demonstrate my problem.
The slightly modified code
///////////////////////////////////////
module solid(){
cube(200);
cube ([150,100,300]);
cylinder(h=400,d=100);
}
//solid();
translate ([100,300,0])
projection(cut=true) translate([0,0,-50])solid();
translate ([100,600,0])
projection (cut=true)translate([0,0,-250])solid();
translate ([100,900,0])
projection (cut=true)translate([0,0,-350])solid();
/////////////////////////////////////////////////
produces the following dxf image
Whereas what I need is the shapes 'stacked' on top of each other, like this.
In openscad the 2d shapes are 'filled in', so you do not get the separate
outlines, and this stacked result is not possible within openscad itself,
afaik. I have to manually move the components in the translated dxf file to
align them, using another cad program.
Is it possible in openscad, perhaps using some command line
options/whatever, to export the dxf file, with each projection located in
the correct position, superimposed on top of each other, without having to
translate and rearrange in an external program? It becomes tedious for more
than a few projections.
On 5/19/2023 3:31 PM, Bryan Lee wrote:
One method I have used in several models is to build in a "mode" that is
manually set for each run.
Right, you do that, but then you wrap it in a shell script that uses the
CLI and -D to set the mode and control the output name.
Initially I translated in x/y so that the dxf's were separated (since
openscad treats them as planes, not lines, and if you 'stack them' in
openscad, you lose the individual boundaries). I then thought that
separate files would be better, with no x/y translation. My 2.5d cnc
software will mill the boundaries, or pocket, to fixed depths for
selected 2d dxf lines, I have to manually select the lines, set the
depth, etc. It is probably easier/quicker to combine the g-code files
from individual dxf files, compared to offsetting the dxf's to the
origin within the cnc software.
On 19/05/2023 20:29, FF Systems wrote:
Why are you translating the 2D cuts? Either don’t translate, or
translate them all to the same coord. The dxf should then be what you
want, iwt.
On Fri, May 19, 2023 at 13:16 Raymond West raywest@raywest.com wrote:
As an alternative to my wanting stacked projections saved as a
single dxf, Is it possible to save as separate dxf's,
programmatically?
//////////////////////////////////
module solid(){
cube(200);
cube ([150,100,300]);
cylinder(h=400,d=100);
}
//solid();
module cut(z){
projection(cut=true) translate([0,0,-z])solid();
}
//cut(150);
//cut(250);
//cut(350);
///////////////////////////
along the lines that the files would be exported as, say,
'projection150.dxf', 'projection250.dxf', and 'projection350.dxf'
based on the above example code.
Hoping that once the scad was written, is it possible to use a
command line to automate it, by something like ' whatever needed
(150,250,350) etc.' ?
If not, I think it would be quicker to manually export separate
dxf's at the various offsets , compared to moving them around in
another program. There are about a dozen offsets, not equally
spaced, in my real world problem types.
Thanks.
On 19/05/2023 16:13, Raymond West wrote:
example to demonstrate my problem.
The slightly modified code
///////////////////////////////////////
module solid(){
cube(200);
cube ([150,100,300]);
cylinder(h=400,d=100);
}
//solid();
translate ([100,300,0])
projection(cut=true) translate([0,0,-50])solid();
translate ([100,600,0])
projection (cut=true)translate([0,0,-250])solid();
translate ([100,900,0])
projection (cut=true)translate([0,0,-350])solid();
/////////////////////////////////////////////////
produces the following dxf image
Whereas what I need is the shapes 'stacked' on top of each other,
like this.
In openscad the 2d shapes are 'filled in', so you do not get the
separate outlines, and this stacked result is not possible within
openscad itself, afaik. I have to manually move the components in
the translated dxf file to align them, using another cad program.
Is it possible in openscad, perhaps using some command line
options/whatever, to export the dxf file, with each projection
located in the correct position, superimposed on top of each
other, without having to translate and rearrange in an external
program? It becomes tedious for more than a few projections.
_______________________________________________
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I was asked for a concrete example. The shell script here is a little
odd because I don't have a shell environment with an OpenSCAD in the
path, but it should be obvious enough to anybody who knows shell
programming.
--- demo.scad ---
mode=1;
if (mode == 1) {
text("one");
}
if (mode == 2) {
text("two");
}
--- demo.sh ---
#! /bin/sh
openscad='C:/Program Files/OpenSCAD-2021.01/openscad'
"$openscad" -Dmode=1 -o demo-1.dxf demo.scad
"$openscad" -Dmode=2 -o demo-2.dxf demo.scad
I've done it in a windows batch file (saved in my openscad folder with
the rest of my scad scripts. simple enough to copy/paste, small edit, to
get extra sections
C:"Program Files"\OpenSCAD\openscad.exe -o projection250.dxf -D z=250
"projection test.scad"
C:"Program Files"\OpenSCAD\openscad.exe -o projection350.dxf -D z=350
"projection test.scad"
C:"Program Files"\OpenSCAD\openscad.exe -o projection50.dxf -D z=50
"projection test.scad"
for the scad file named "projection test.scad"
module solid(){
cube(200);
cube ([150,100,300]);
cylinder(h=400,d=100);
}
//solid();
module doit(z){
projection(cut=true) translate([0,0,-z])solid();
}
doit(z);
//doit (250);
//doit(350);
//doit(50);
Now to see if it is better in practice, compared to the original
translated single file.
On 20/05/2023 17:52, Jordan Brown wrote:
I was asked for a concrete example. The shell script here is a
little odd because I don't have a shell environment with an OpenSCAD
in the path, but it should be obvious enough to anybody who knows
shell programming.
--- demo.scad ---
mode=1;
if (mode == 1) {
text("one");
}
if (mode == 2) {
text("two");
}
--- demo.sh ---
#! /bin/sh
openscad='C:/Program Files/OpenSCAD-2021.01/openscad'
"$openscad" -Dmode=1 -o demo-1.dxf demo.scad
"$openscad" -Dmode=2 -o demo-2.dxf demo.scad
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Having forgotten about the details of batch files, and never getting
into power shell, I got Bing in Edge (OpenAI chat-gpt v 4, afaik) to
generate a more succinct batch file. took a bit of tooing and froing (I
changed the z values from b4)
@echo off
setlocal enabledelayedexpansion
set z_values=355 245 5
for %%z in (%z_values%) do (
echo Running OpenSCAD with z=%%z
C:"Program Files"\OpenSCAD\openscad.exe -o projection%%z.dxf -D
z=%%z "projection test.scad"
)
endlocal
On 20/05/2023 23:07, Raymond West wrote:
I've done it in a windows batch file (saved in my openscad folder with
the rest of my scad scripts. simple enough to copy/paste, small edit,
to get extra sections
C:"Program Files"\OpenSCAD\openscad.exe -o projection250.dxf -D z=250
"projection test.scad"
C:"Program Files"\OpenSCAD\openscad.exe -o projection350.dxf -D z=350
"projection test.scad"
C:"Program Files"\OpenSCAD\openscad.exe -o projection50.dxf -D z=50
"projection test.scad"
for the scad file named "projection test.scad"
module solid(){
cube(200);
cube ([150,100,300]);
cylinder(h=400,d=100);
}
//solid();
module doit(z){
projection(cut=true) translate([0,0,-z])solid();
}
doit(z);
//doit (250);
//doit(350);
//doit(50);
Now to see if it is better in practice, compared to the original
translated single file.
On 20/05/2023 17:52, Jordan Brown wrote:
I was asked for a concrete example. The shell script here is a
little odd because I don't have a shell environment with an OpenSCAD
in the path, but it should be obvious enough to anybody who knows
shell programming.
--- demo.scad ---
mode=1;
if (mode == 1) {
text("one");
}
if (mode == 2) {
text("two");
}
--- demo.sh ---
#! /bin/sh
openscad='C:/Program Files/OpenSCAD-2021.01/openscad'
"$openscad" -Dmode=1 -o demo-1.dxf demo.scad
"$openscad" -Dmode=2 -o demo-2.dxf demo.scad
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