igesout

Convert surfaces, curves and lines to IGES file

Description

IGESOUT converts nurbs surfaces, curves and polylines to a single compact IGES format file.

Vectorizing was implemented wherever possible, so the code should run quickly.

It was verified by ProE and MasterCam.

Acknowledgements

The author wishes to acknowledge the following in the creation of this submission:
Nurbs2IGES

• MATLAB release: MATLAB 7.3 (R2006b)
• Other requirements: http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=312&objectType=file

[c m]

Really fast.
I used it to get a surface model from a coordinate measuring machine.
Now if only I could get it into Solidworks properly!

[Daniel Lopes]

Works brilliantly! Thanks a lot!
CUBIT (http://cubit.sandia.gov/) is also capable to import the *.igs file created by igesout(.).

Just one remark:
At line 136,
"G.date = datestr(today); ",
I had to change 'today' -> 'date', since MATLAB apparently doesn't recognize 'today'.

[johnny chen]

good

[Wenbin Chen]

thanks,it works well in UG!

[Johannes Korsawe]

This is perfect! Thank you a lot for doing the ugly work of going through the syntax of IGES.

[Michael Fassbind]

A very good and useful improvement to my initial offering. I use your code now.

[Kian Chai]

Are you able to do vice versa? I am sure you understand the IGES code before you create this program. I am trying to understand the IGES structure. Can your code write out the boundary points to represent a surface? It would be great to import this point into Excel to show the figure. Generally I would like to import IGES data as the data points in the array then I can plot it into Matlab figure.

[Daniel Claxton]

I have received several questions asking about the reverse process iges conversion ie read an iges file into Matlab. Someone has already submitted a handy toolbox that does just that. You can find it here: http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=13253&objectType=file

[Liang]

It is really an excellent code. However, when I try to create a large geometry, it is still time consuming. The function 'swap' excutes too many string copy in the 'while' loop and it cost much time when there are a mount of data points. I rewrote the function as follow and the it only needs 1/3 time.

function s = wrap(str,delim,n)
    tmp = blanks(n);
    strlength = length(str);
    i = 1;
    index=1;
    while (strlength-index+1>n)
        tmp = str(index:index+n-1);
        d = strfind(tmp,delim);
        d = d(end);
        index = index + d;
        s(i,:) = [tmp(1:d) blanks(n-d)];
        i = i+1;
    end
    if (strlength-index+1>0)
        s(i,:) = [str(index:strlength) blanks(n-(strlength-index+1))];
    end

[Matt]

I had trouble with changing the units from 'IN' to 'MM'. I had to remove {:} after vargin in the call to setParams. Also, inside of setParams, I moved G to be outside of the 'lower' function. I'm using V7.7, so maybe it used to work this way in a previous version.

[Frank Gommer]

Probably I'm just not good enough with the "igesout" code but I'm wondering how a bit more complex structure, e.g. surface with holes, could be exported? For example, I tried to export the 2D geometry from the demos of the nurbs toolbox "demogeom.m". This one consist out of multiple nurb curves... I just can't get it running :( Any suggestions? Thanks!

[Brian]

Hey, thanks a LOT for posting this, you saved me days of work.

I was wondering: I have a binary tube structure geometry (so just a series of connected cylinders), and I was wondering if this can be used with your tool to export it into a IGES format. Would you expect there to be any conflicts?

[Ahmad Rafsanjani]

Thank you for this excelent job!
Is it possible to create two curve separately?
Because by default it will connect the 2nd curve to end of the 1st one.

Thanks,
Ahmad

[Jessica]

Could you add a simple example of surf (or mesh) to iges conversion?

[Mark Gordon]

I'm trying to convert point cloud data (from a Kinect) to iges to import into Rhino (and then to Solidworks).

I put my data in to X, Y, and Z columns and the function appears to run successfully. However, when I try to import this file into Rhino it says: "Rhino found nothing to import from this IGES file.
This happens when an IGES file has no valid independent geometry."

Any thoughts on what is going wrong?

[Brendan]

 

[Brendan]

Seemed to run just fine, but ANSYS can't read it. NrbsSrf2IGES produces IGES that can be read.

[Lee byan]

seemed to run fine, but the output iges file seemed to be wrong and can not be read in ug,
i just used the example in the code as following,
pline = [0,0,1.1112;0,1.3333,2.1082;0,2.6667,1.6397;0,4,1.3346;];
   lin = pline(1,:)*3;
pt = pline(1,:);
igesout({pline lin pt},'TestIGES')

the TestIGES.igs is as following:

Matlab to IGES converter. Written by Daniel Claxton S0000001
1H,,1H;,7HMatlab ,11HReceiver ID,12HTestIGES.igs,5HPCWIN, G0000001
14HMatlab -> IGES,16,6,15,13,15,1,3,2HIN,8,0.016000, G0000002
20H24-Apr-2012 19:54:21,0.000100,4, G0000003
27HD. Claxton [e-mail],21HUniversity of Florida,11,3, G0000004
20H24-Apr-2012 19:54:21; G0000005
     106 1 0 1 0 0 0 1D0000001
     106 1 0 3 12 0D0000002
     116 4 0 1 0 0 0 3D0000003
     116 1 0 1 0 0D0000004
     116 5 0 1 0 0 0 5D0000005
     116 1 0 1 0 0D0000006
106,2,4,0.000000,0.000000,1.111200,0.000000,1.333300,2.108200,
0.000000,2.666700,1.639700,0.000000,4.000000,1.334600,0., 1.,
 0., 1.;
116,0.000000,0.000000,3.333600,0., 1., 0., 1.;
116,0.000000,0.000000,1.111200,0., 1., 0., 1.;
S0000001G0000005D0000006P0000005 T0000001