Hi ...

Please see the enclosed topographical model (a small part of a model with changes in topo and buildings added.

The problem is that over considerable time and model variations I have created some small (and large) holes in the surface.

I would like to close the smaller ones but am finding that I cannot do it (I can't find a 'rebuild' type command) ... so I tried to create a solid plug for the larger of the small holes. No problem with that but ...

I thought I could use boolean difference to trim the protruding solid so that I would have a uniform plug at the larger surface ... but this process does not seem to work. Probably there is something wrong with the larger surface that I cannot see.

So here it is ... I am sure someone can tell me where I am going astray.

thanks,
eric

Select the surface, then select the edge of the hole and hit delete.

For the holes on the side area, that are "open", you will need to untrim the entire surface (Select one of the edges and hot ctrl+a and then delete) Before you do that, you may want to grab your boundry edges to use to retrim the larger untrimmed surface afterwards.

Thanks BurrMan ...

It worked like a charm ... instantly!

I had been trying everything else for an hour or so.

I could not find the solution anywhere.

Much appreciated fast response!

eric

Sounds like you are all set up ok now eric? Thanks for the quick assist Burr!

- Michael

Hi Michael ...

Yes, that method works perfectly.

I generally use contour lines and "sweep" to build terrain and to make changes as needed for my projects even though I have other software that will do it automatically with point clouds or a group of contour lines. I simply like working with MoI for as much of my work as possible.

I have been working on this particular project for years and built the original model with a combination of other software. I have a feeling that some holes occurred over time modifying grading plans with meshes that MoI does not read. It is a Tibetan Buddhist retreat and Temple built in stages as donations come in. Over time modifications and budget changes are a fact of life.

All is well now, and thanks.

eric

<< Before you do that, you may want to grab your boundry edges to use to retrim the larger untrimmed surface afterwards.

From the top view terrain is not a perfect rectangle!
Does this normal ?
So the little parts who must close the "open sides" are some random to choice as the good "boundry edges"?
You closed this "2 boundry edges" missing by hand ?
Maybe some tiedous if you have hundred of these ? (multiple blending don't exist ? Extend don't work ! A closing curves function? )

the surrunding border "grabing edges" before the untrim! :)

Hi Pilou,

You made me laugh with your first picture it looks like an acne cream advertisement showing before and after :)

Hopefully the original trim curves weren't deleted.

~Danny~

:)

< Hopefully the original trim curves weren't deleted.


In fact they don't exist, it's my problem to refound it!

Hi Frenchy,
Yes, extracted all those surrounding edges and then ran blend on the open areas, so I could retrim the boundry.....

But yeah, if you had a file with "250 little open areas" it may take awhile.... I guess you are asking about something like an "autoclose"?

If any of that is unclear I'll make a video.

<< I guess you are asking about something like an "autoclose"?

yes absolutly! :)

A little video is always wellcome!

I am interested of your drawing lines / curves surrounding edges for the numerous (or not) closing holes on the sides!

Hey Frenchy,
Here's a short video using a couple scripts:



I used points to mark the start of the openings so I knew where to blend. It could help if there were "many openings", but at the same time, selecting that boundry would be tedious, if there were many of the little openings. Not sure of any way to automate that. I would guess there really isnt any need for the boundry to be "Not a square", so I would just use the rectangle tool and go from corner to corner on the surface and use that to trim. Just running the "untrim the outer edges" script only.

Anyway.......

Thx for the video!

Cool trick to write some words on the screen for help to see the actions to make!

Any reason for make an extrude and not directly a simple Trim with the "rectangle"?

And yes an automatic close a set of lines will be useful ! (Merge function don't work in this case :(

""""""""""""Any reason for make an extrude and not directly a simple Trim with the "rectangle"?"""""""""""

I had some issues with using the curve. I probably could have "flattened" it and had it work. It's just a method I use when I have problems with the trim curve because it seems to be a more "direct trim" as opposed to the "projected" one. Maybe Michael can comment on this. Like "having the trim curve be non-planar made it a different calc or something.

""""""""" It's just a method I use when I have problems with the trim"""""""""""""

..i do the same..
i think cutting surface must penetrate into other surface,when last one is complex
i suppose that trim using just a curve project a lot of points,and if the target is ondulated or complicated,tool not project enough points to cover all the wavy:so trim fails.
(this is just my deduction,forgive me if is not correct)
---------
thanks Burr for your tuts,i learned few fundamental tricks in the past
just don't know why you don't speak also...it's your leanguage!!! (i must do lot of effort to speak in English when i record my modeling sessions...damn...)

Hi Burr, yeah a trim curve that is non-planar goes through a much different process than a planar one, it tries to get the curve onto the surface by a process of pulling it down along the surface normals, but that process in the geometry library only works very well currently if the curve is really pretty close to the surface already. If it's a fair distance away it tends to make squiggles in the curve. I've been planning for quite a while to overhaul that particular "pull down 3D curve to surface" mechanism.

- Michael

""""""just don't know why you don't speak also..""""""""""

I'll try to remember to speak in them. I guess it can help some with alot of the little stuff.....