topic Re: extrude between fail in 3D Questions

extrude between fail

VictorKlinkenberg — Wed, 11 Mar 2015 13:45:40 GMT

Hi all,

I don't know what I'm doing wrong here but a seemingly simple operation has resulted in wrong outcome.

I am trying to create an extruded feature between two tins. I have a Tin constructed with four points for the top and a tin with four points for the bottom. simple. then I constructed the tin domain and used tha in the extrude between tool. the resulting multipatch is an extrude square with flat top and bottom; set at the minimum distance between the tins. ie the feature is extruded between the highest elevation of the lower tin and the lowest elevation of the top tin.

I must have tried everything by now (triangulated domain, using the break lines of the tins as polygons) but nothing works.

There must be something simple I am missing here. Anyone know what it is?

Thanks a bunch

Victor

Re: extrude between fail

KhalidDuri1 — Tue, 24 Mar 2015 00:55:28 GMT

Can you share the error message you've received?

Re: extrude between fail

VictorKlinkenberg — Tue, 24 Mar 2015 05:49:09 GMT

Hi Khalid,

The thing is I get no error message at all, it says it succeeded the extrusion...

Victor

Re: extrude between fail

NeilAyres — Tue, 24 Mar 2015 11:30:48 GMT

What do the 2 tins look like? I am trying to imagine how CreateTin makes a tin from only 4 points?

Re: extrude between fail

VictorKlinkenberg — Tue, 24 Mar 2015 13:11:47 GMT

Creation of tins is done using a Delauny triangulation, using four points this results in two triangles (think of a piece of paper slightly folded along one diagonal). in the attachment there are three tins, each made from four points, left seen from the top, right birds eye view.

Re: extrude between fail

NeilAyres — Wed, 25 Mar 2015 08:52:09 GMT

Thanks for posting. There are 3 tins here. Is there another set which is vertically above or below these ones?

Don't forget that Extrude between can only extrude the portion where both top and bottom overlap.

Re: extrude between fail

VictorKlinkenberg — Wed, 25 Mar 2015 11:04:19 GMT

Yes, I have on another occasion used these tins for an extrusion with a top and bottom tin, this was simply an example of the shape of the four-point-tins.

For the extrusion that failed recently I have used similarly shaped tins on the same location but one as top and one as bottom tin. The problem is that the extruded feature does not take on the shape of the tins but becomes a simplified squarish shape. I have attached an image, made up of three screenshots. The top is a view of the two tins on top of each other. the second is the tins with the wrongly extruded multipatch (pale orange), the lowest one is also the two tins with multipatch but now seen from a different angle. Notice how the multipatch is constructed with holes in it...

Cheers,

Victor

Re: extrude between fail

KhalidDuri1 — Thu, 26 Mar 2015 18:38:23 GMT

Can you try applying a slight buffer to the TIN domain output, then using the buffered polygon as your input to Extrude Between? If this works, then you ran into a rarely encountered known issue that occurs along certain coincident boundary conditions.

Re: extrude between fail

VictorKlinkenberg — Fri, 27 Mar 2015 09:30:09 GMT

Thanks for you reply Khalid, I tried the process again but now with a buffered polygon but it unfortunately yielded the same results. Any other ideas? I'll see if I can contact ESRI directly as well, if there's a solution there I'll post it here.

Victor

Re: extrude between fail

KhalidDuri1 — Fri, 27 Mar 2015 14:42:10 GMT

Would you mind sharing the data by posting the XYZ coordinates? I couldn't reproduce the issue with an arbitrary set of 4 nodes per TIN.

Regards,

Khalid H. Duri

3D Analyst Product Engineer

Esri | 909.793.2853 x2747

Re: extrude between fail

VictorKlinkenberg — Fri, 27 Mar 2015 15:00:29 GMT

Some guys here at ESRI Netherlands are on it now, it seems there might be a problem with the coordinate system we're using. I'll post again when we have a solution or if the problem persists, would be a bit much to have people all over the globe working on a solution... Thanks a lot though!

Victor

Re: extrude between fail

VictorKlinkenberg — Tue, 31 Mar 2015 13:19:19 GMT

Hi everyone,

I have been in touch with ESRI NL people and they have not been able to find a solution either. Two issues were suggested: one is the use of a custom coordinate system and the other is that the TINs are too 'complex'. I can hardly think of a less complex TIN shape but here we are.

This is starting to become a pressing problem as I need this for my research. All help is welcome. I have added a mappackage for anyone interested in having a look at it. I have set everything in WGS 1984 Web Mercator now. (also the tins in this example are made up of a few more points)

Thanks!

Victor

Re: extrude between fail

VictorKlinkenberg — Mon, 20 Apr 2015 07:38:46 GMT

Hello everyone,

The issue described in this post has been reported and is being dealt with as a bug in the program. ESRI is apparently working on it so it will be available again in a new release. In the mean time I'll see if I can perform the same task in a 3d modelling program. As soon as I here more about it I'll post it here.

Thanks for the replies!

Victor