I have watched a number of tutorials, even more than once and one thing I still have difficulty wrapping my brain around is why or how to simply remove or edit these types of seams which effect my ability to perform other functions later. I was under the impression that I could simply trim them away but that does not seem to be the case on faces, only curves? Furthermore the merge command does not appear to work as expected all the time. On one side of the model I am able to merge a split arc edge curve into one clean one. On the other side I am unable to perform merge and my arc stays split into two parts because of that other existing seam. Why would only one side of my model produce this vertical seam after performing a mirror whereas the other side does not? I Am conscientiously working in a way to produce solids, (which I am able to accomplish with the geometry pictured, but am unsure why some of the seams appear in the first place. If I mirrored and boolean union both halfs, the seam should go away?

I was able to solid the body but with many extra steps having to rebuild the troubled surfaces. In 30 minutes I will run into the same issue of seams appearing again elsewhere and this is what I don't understand because I try to work cleanly and follow tutorials on how to avoid errors and yet I tend to get stuck or break something.

Hi Art, well it's not really an error to have those edges between things. It's true that it is better to not have them when it's easy but the ones you circled in your first post probably won't be a big issue.

What is it that you're planning on doing in those areas that you must have them removed?

You can have a solid with those edges in place, they don't have to be removed to get a solid.

- Michael

Hi Art,

> Furthermore the merge command does not appear to work as expected all the time. On one
> side of the model I am able to merge a split arc edge curve into one clean one. On the other side
> I am unable to perform merge and my arc stays split into two parts because of that other existing
> seam. Why would only one side of my model produce this vertical seam after performing a mirror
> whereas the other side does not?

Can you please post the .3dm model file with the edges you are referring to here that won't merge?


> If I mirrored and boolean union both halfs, the seam should go away?

Currently boolean union can remove edges in the combined object in 2 cases - when they are planes that are coplanar, and when the 2 faces have the same full underlying surface.

It doesn't currently know how to combine 2 side-by-side extrusions into one extrusion but that is something that I want to add.

- Michael

Guess I was referring to the ability to merge two edgecurves into one like you can on normal curves? Is nt not possible because of the nurb line running down the center of the model?



Discovered can simply assign a style to edges I find unsightly and simply hide them. Out of sight out of mind. Works for me. Going back to my original post, I guess I could have simply hid unsightly edges via styles. But I also wasn't sure if something geometrically was screwy in the nurbs themselves. Thanks for the help, sorry for the confusion.

Hi Art,

re:
> Guess I was referring to the ability to merge two edgecurves into one like you can on normal curves?
> Is nt not possible because of the nurb line running down the center of the model?

Yes that's correct - 2 edges can only be merged together into a single longer edge if they are the only 2 edges touching each other. If there are additional edges connected then it can't merge them.


> But I also wasn't sure if something geometrically was screwy in the nurbs
> themselves. Thanks for the help, sorry for the confusion.

No nothing is inherently wrong with that. It can be a good idea to have larger faces when possible instead of multiple fragments but it does not ruin the model to have some of those.

I do want to update the face merging for boolean union so it would merge the cases you showed.


> Discovered can simply assign a style to edges I find unsightly and simply hide them.

You can also select them and use Edit > Hide without assigning a style.

- Michael

You can try this script by Max Smirnov!
http://moi3d.com/forum/index.php?webtag=MOI&msg=7912.4

in this image following curves are managed before the extrusion...


In this one curves are managed directly...

Micheal, thanks for your response. Like how there are multiple solutions here. :)

Interesting PILOU. I have not gotten into using scripts quite yet but will try this out soon. Only gotten as far as setting custom hotkeys :)

Precision...
code: (only one line)
var fs=moi.filesystem, fl=fs.getTempDir()+'tmp.stp', gd = moi.geometryDatabase; gd.fileExport(fl); gd.removeObjects(gd.getSelectedObjects()); gd.fileImport(fl); fs.deleteFile(fl);

Copy the Max's code in a .js file, and save it the "scripts" directory. (with any name you want without space )
Also the "commands" folder is ok.
To use it, simply select the curves you want to elaborate and run the command.
Load the file and put it in the scripts folder of Me (if this folder does not exist, create it)
Make a shortcut, or press TAB and write the name of the script
Select curves and call the plugin.

Thanks PILOU, looks pretty straightforward.