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.