Terrain from contours - improve on native 'from contours'?

utiler · 3 Feb 2013, 01:51

No problem, Fredo, I'm not surprised at issues with the first one as it was a survey of a site with an existing residence on it which prevented a uniform data to be taken...

What you've done with the other one looks good! Can't wait to see how this plugin ends up. I'll see if I can dig out some other survey plans off file and convert them for you.

fredo6 · 12 Feb 2013, 23:04

@utiler said:

No problem, Fredo, I'm not surprised at issues with the first one as it was a survey of a site with an existing residence on it which prevented a uniform data to be taken...

I evolved the algorithm for calculating the concave hull on your complex model and could obtain a result on your model, without any change, here attached.

A lot of the problem come from the small terminations hooks in several contours, like illustrated on the picture below

The issue with terrain construction is that you need to have a correct hull in order to determine the spatial distribution of the influence of the contours.

utiler_survey01.skp

Fredo

PS: I hope to finish a first version in 2-3 weeks time, as I have actually very few moment available currently

EarthMover · 12 Feb 2013, 23:30

Can't wait! Thanks Fredo!

utiler · 13 Feb 2013, 01:15

that is looking very sweet, Fredo!!!! Can't wait as well!!!

Krisidious · 13 Feb 2013, 02:48

here's a topo I just got from a survey company... if you need tests.

HANNA-TOPO.dwg

EarthMover · 13 Feb 2013, 02:56

Here's another set of contour lines from my current project. All welded up.

Coleman Topo.skp

pbacot · 13 Feb 2013, 03:37

I've gone ahead and started using one of the tests you made of my contour set, Fredo. I don't have a lot to do as yet but it was really clean leveling some areas and "filling" others with Artisan. Maybe we can illustrate the cut and fill on the project with before and AFTER terrains. Thanks!

fredo6 · 13 Feb 2013, 06:58

@earthmover said:

Here's another set of contour lines from my current project. All welded up.

Adam,

Here is what I obtain on the original file. I think however that the contour should be simplified a little bit because there are a lot of edges and it slows down the calculation.

Earthmover Coleman Topo.skp

Fredo

EarthMover · 13 Feb 2013, 16:37

A quick play with the contours. Simplified the curves using Thom's Edge Tools. Then did a From Contours terrain. Then a Drape Cpoints / Triangulate method to retopo. Then opened the high res contour lines in 3ds Max and used the free Populate Terrain plugin to generate a similar terrain. Then brought it back into sketchup and compared the two.

Earthmover Coleman Topo (1).skp

dtrarch · 13 Feb 2013, 19:24

Terragen2 download
http://planetside.co.uk/index.php?option=com_content&view=article&id=30&Itemid=170
Someone here was looking for this and here tiz

dtr

fredo6 · 13 Feb 2013, 20:11

By the way, did anyone try SimuTerra? (see this post )

Fredo

Chris Fullmer · 13 Feb 2013, 20:28

Does anyone know if Erez is still maintaining his Simuterra program? We haven't seen him around in ages!

solo · 13 Feb 2013, 21:44

Nice clean results.

I have a set of contours that I'd like to compare if you have the time, I used sandbox and got a mess, wondering if this will give a better result. Here is the skp, however I'm wondering if the dwg would not be better.

test contours.skp

fredo6 · 13 Feb 2013, 23:15

@solo said:

Nice clean results.

I have a set of contours that I'd like to compare if you have the time, I used sandbox and got a mess, wondering if this will give a better result. Here is the skp, however I'm wondering if the dwg would not be better.

Here is the result on your model without any change, with the current version of TopoShaper. Grid definition is 60 x 27. I did some tests with a higher definition but cannot post it back because the size of the skp file is bigger than 4 Mb.

Note that your contours add up to more than 44,000 edges, with a quite complex concave hull. So it takes a minute to calculate it and there are still some problems on the borders.

Solo test contours.skp

Fredo

solo · 14 Feb 2013, 01:05

That's very clean, wow, this is awesome.

pbacot · 14 Feb 2013, 04:44

Adam,

Very cool working out the c-points method. I didn't realize those capabilities existed.

Fredo,

Thanks for interface video. Looking great! What you do to program this is so far beyond my ken....

Peter

fredo6 · 14 Feb 2013, 21:46

@krisidious said:

here's a topo I just got from a survey company... if you need tests.

I imported the dwg file and found that most contours were interrupted in their middle. This is a problem for TopoShaper currently, at it allows topological communication between contours.

I just closed the missing links, and here is the result
Krisidious Hanna Topo.skp

Thanks again for this testing model

Fredo

Krisidious · 14 Feb 2013, 23:15

Yes, Fredo... No problem. That's where the road runs in the property. I just thought you'd like to get samples directly from surveyors. no touch ups. Looks great. can't wait to buy/download this plugin.

Edit... actually that is not the road. it's where the grade heights are typed in as text.

solo · 11 Mar 2013, 16:56

Any news?

Sorry about bumping this topic but I'm anxiously awaiting this plugin, hopefully it will be in the store soon.

I have a tricky project, I got contours from Civil 3D in fbx format but even though it's not a very large or complicated mesh needed it seems that there are too many edges (think the segments are too much for su) I open it but it crashes sandbox after 7 minutes of thinking.

fredo6 · 11 Mar 2013, 18:45

@solo,

I am progressing. Actually, I had to build a cleanser module because all the contours I have seen so far have many glitches that prevent correct generation of terrain.

For your terrain, just send me the contours and I will see if TopoShaper can handle it.

Fredo