Part authoring scripts and tools


Part authoring scripts and tools
#1
Hi All,

Sometimes I find it hard to keep track of all the little programs for part authoring: things like 'inliner' and Philo's myriad of tricky tools. Could we keep a master list of them in this thread?

It also allows me (and others) to share scripts that we wouldn't upload to the master software list. As I will do in a few seconds.

Tim
Reply
Re: Part authoring scripts and tools
#2
This perl script creates a corner between two cylinders at arbitrary angle, segments and radius.

It and the next script were used to make the tricky bits of this

Code:
use Math::Trig;

## Computes the corner between two cylinders
## or radius $rad at $theta angle with $segs segments

$pi=3.141592635;
$d2r=$pi/180;

## Specify number of segments, angle, radius
$segs=16;
#$theta=55.238*$d2r;
$theta=34.742*$d2r;
$rad=4;

## Masks
$linemask="2 24  %.2f %.2f %.2f %.2f %.2f %.2f\n";
$optmask="5 24  %.2f %.2f %.2f  %.2f %.2f %.2f  %.2f %.2f %.2f  %.2f %.2f %.2f\n";
$trimask="3 16  %.2f %.2f %.2f  %.2f %.2f %.2f  %.2f %.2f %.2f\n";
$quadmask="4 16  %.2f %.2f %.2f  %.2f %.2f %.2f  %.2f %.2f %.2f  %.2f %.2f %.2f\n";

# Internal variables
$thetah=$theta/2;

foreach $n (0..($segs-1)) {
    $phi=$n/$segs*2*$pi;

    $yeff=(1-cos($phi))*$rad;
    $xeff=sin($phi)*$rad;

    $x1=$xeff;
    $y1=$yeff;
    $z1=0;

    $x2=$xeff;
    $y2=$yeff;
    $z2=$yeff*tan($thetah);

    $x3=$xeff;
    $y3=$yeff*cos($theta);
    $z3=$yeff*sin($theta);

    $pts1->[$n]=[$x1,$y1,$z1];
    $pts2->[$n]=[$x2,$y2,$z2];
    $pts3->[$n]=[$x3,$y3,$z3];
}

foreach $n (0..($segs-1)) {
    $np=($n<($segs-1))?($n+1):0;
    $nm=($n>0)?($n-1):($segs-1);

    $x10=$pts1->[$n][0];
    $y10=$pts1->[$n][1];
    $z10=$pts1->[$n][2];

    $x20=$pts2->[$n][0];
    $y20=$pts2->[$n][1];
    $z20=$pts2->[$n][2];

    $x30=$pts3->[$n][0];
    $y30=$pts3->[$n][1];
    $z30=$pts3->[$n][2];

    $x1p=$pts1->[$np][0];
    $y1p=$pts1->[$np][1];
    $z1p=$pts1->[$np][2];

    $x2p=$pts2->[$np][0];
    $y2p=$pts2->[$np][1];
    $z2p=$pts2->[$np][2];

    $x3p=$pts3->[$np][0];
    $y3p=$pts3->[$np][1];
    $z3p=$pts3->[$np][2];

    $x1m=$pts1->[$nm][0];
    $y1m=$pts1->[$nm][1];
    $z1m=$pts1->[$nm][2];

    $x2m=$pts2->[$nm][0];
    $y2m=$pts2->[$nm][1];
    $z2m=$pts2->[$nm][2];

    $x3m=$pts3->[$nm][0];
    $y3m=$pts3->[$nm][1];
    $z3m=$pts3->[$nm][2];

    printf($linemask,
       $x20, $y20, $z20,
       $x2p, $y2p, $z2p);
    if (($x10!=$x30) || ($y10!=$y30) || ($z10!=$z30)) {
    printf($optmask,
           $x10, $y10, $z10, $x20, $y20, $z20,
           $x1p, $y1p, $z1p, $x1m, $y1m, $z1m);
    printf($optmask,
           $x30, $y30, $z30, $x20, $y20, $z20,
           $x3p, $y3p, $z3p, $x3m, $y3m, $z3m);

    printf($quadmask,
           $x1p,$y1p,$z1p,$x10,$y10,$z10,
           $x20,$y20,$z20,$x2p,$y2p,$z2p);
    printf($quadmask,
           $x2p,$y2p,$z2p,$x20,$y20,$z20,
           $x30,$y30,$z30,$x3p,$y3p,$z3p);
    }
    else {
    printf($trimask,
           $x1p,$y1p,$z1p,$x10,$y10,$z10,
           $x2p,$y2p,$z2p);
    printf($trimask,
           $x2p,$y2p,$z2p,
           $x30,$y30,$z30,$x3p,$y3p,$z3p);
    }
}
Reply
Re: Part authoring scripts and tools
#6
What do I need to run such scripts?
Reply
Re: Part authoring scripts and tools
#7
Any standard installation of Perl should work. I use AcitvePerl on Windows and whatever is pre-installed on Linux.

If you install ActivePerl just copy the code into a text file and give it a .pl extension (or drop me an email for the script). It should then run from the command line if your installation is smooth.

The advantage is that it's totally portable, very quick to write, and easy to adapt. The disadvantage is that it's hard to read!

Tim
Reply
Re: Part authoring scripts and tools
#8
Thanks, Tim. I may give it a try.

/Tore
Reply
Re: Part authoring scripts and tools
#3
This perl script creates the intersection between a cylinder and a plane at a given radius, segments and angle

Code:
use Math::Trig;

## Computes the intersection between a cylinder
## and the yz-plane.
## Radius $rad at $theta angle with $segs segments

$pi=3.141592635;
$d2r=$pi/180;

## Specify number of segments, angle, radius
$segs=16;
#$theta=34.742*$d2r;
$theta=(90-34.742)*$d2r;
$rad=4;

## Masks
$linemask="2 24  %.2f %.2f %.2f %.2f %.2f %.2f\n";
$optmask="5 24  %.2f %.2f %.2f  %.2f %.2f %.2f  %.2f %.2f %.2f  %.2f %.2f %.2f\n";
$trimask="3 16  %.2f %.2f %.2f  %.2f %.2f %.2f  %.2f %.2f %.2f\n";
$quadmask="4 16  %.2f %.2f %.2f  %.2f %.2f %.2f  %.2f %.2f %.2f  %.2f %.2f %.2f\n";

foreach $n (0..($segs-1)) {
    $phi=$n/$segs*2*$pi;

    $yeff=(1-cos($phi))*$rad;
    $xeff=sin($phi)*$rad;

    $x1=$xeff;
    $y1=$yeff*sin($theta);
    $z1=$yeff*cos($theta);

    $x2=$xeff;
    $y2=0;
    $z2=$yeff/cos($theta);

    $pts1->[$n]=[$x1,$y1,$z1];
    $pts2->[$n]=[$x2,$y2,$z2];
}

foreach $n (0..($segs-1)) {
    $np=($n<($segs-1))?($n+1):0;
    $nm=($n>0)?($n-1):($segs-1);

    $x10=$pts1->[$n][0];
    $y10=$pts1->[$n][1];
    $z10=$pts1->[$n][2];

    $x20=$pts2->[$n][0];
    $y20=$pts2->[$n][1];
    $z20=$pts2->[$n][2];

    $x1p=$pts1->[$np][0];
    $y1p=$pts1->[$np][1];
    $z1p=$pts1->[$np][2];

    $x2p=$pts2->[$np][0];
    $y2p=$pts2->[$np][1];
    $z2p=$pts2->[$np][2];

    $x1m=$pts1->[$nm][0];
    $y1m=$pts1->[$nm][1];
    $z1m=$pts1->[$nm][2];

    $x2m=$pts2->[$nm][0];
    $y2m=$pts2->[$nm][1];
    $z2m=$pts2->[$nm][2];

    printf($linemask,
       $x20, $y20, $z20,
       $x2p, $y2p, $z2p);
    if (($x10!=$x30) || ($y10!=$y30) || ($z10!=$z30)) {
    printf($optmask,
           $x10, $y10, $z10, $x20, $y20, $z20,
           $x1p, $y1p, $z1p, $x1m, $y1m, $z1m);

    printf($quadmask,
           $x1p,$y1p,$z1p,$x10,$y10,$z10,
           $x20,$y20,$z20,$x2p,$y2p,$z2p);
    }
    else {
    printf($trimask,
           $x1p,$y1p,$z1p,$x10,$y10,$z10,
           $x2p,$y2p,$z2p);
    }
}
Reply
Re: Part authoring scripts and tools
#4
Here are some scripts I've written. They're not all necessarily part authoring tools, but if anyone else finds them useful I suspect it'd be the part authoring crowd.

LDMerge - Command line script to combine LDraw directories. It keeps of record of changes which can be used to "undo" the merge. Primarily useful for temporarily merging unofficial parts with official library in order to use programs that don't recognize the /Unofficial directory.

LDTrim - Command line utility to reformat LDraw code (trim whitespace, justify columns, strip extraneous zeros, etc). Most of this can be done with LDDP but it's handy to have options.

"Export to LDraw" plugin for Google Sketchup - Derived from example by Jim Foltz.
Reply
Re: Part authoring scripts and tools
#5
I'm an idiot and should have started this in the proper forum. Moving it now!

Tim
Reply
« Next Oldest | Next Newest »



Forum Jump:


Users browsing this thread: 1 Guest(s)
Forum Jump:


Users browsing this thread: 1 Guest(s)