Best Practices question - Using a site model for a 'flat' site?

[hollister design Studio]

I was wondering if that is a general practice for landscape design in VW?

 

Is there is any reason NOT to lay out a flat site model?

 

 

 

[zoomer]

I can't see any reason why not using a flat DGM.

 

I rather sounds very cool.

Finally a simple square "Mesh" which should allow to use complex

Modificators, even touching each other, without any fictive error messages

because of resolution errors ?

 

EDIT

Ahm, no.

Using any n-Gon Modifier would cause the DGM to tesselate the surrounding

Area by triangles in a complex way anyway. And the next Modifier would work

on top of that triangulation and again cut each crossing edge again and so on.

So not much win on avoiding Mesh complexity over time.

 

But you can still calculate cut and fill and such things.

 

TL;Dr;

No reason, use flat DGMs.

[hollister design Studio]

@zoomer 

 

I just tried it and it made Vectorworks CRAWL...

 

I couldn't draw or select anything, or even tumble the camera!

 

Deleted it and made a 3D polygon instead and all is good.

 

 

[zoomer]

I haven't tried a flat DTM from a single rectangle (3D Polygon) so far.

Have to look into it.

[hollister design Studio]

@zoomer maybe if I had made it from two 3d polylines or stake objects - instead of a single rectangle which I converted to a 3D polygon.

No time to test that right now.

[zoomer]

Hmmh,

 

for me it seems to work.

Rectangle, convert to 3D Poly, create DTM ...

Rectangle, use as Modifier, elevation -3m,

update DTM, show proposed ....

 

Looks reasonable.

 

And yes, the Triangle Meshing in Wireframe looks already much more

complicated than needed to describe the geometry.

Edited February 1, 2021 by zoomer

[Rossford]

Saw a presentation at the last live summit.  An urban designer drew streetscapes without topo change, figuring, I guess people perceive most streets as flat enough that they don't need the 1-2% road and sidewalk topo.  He used 3D rectangles, for streets, walks, curbs, buildings, etc.

[Tom W.]

Doesn't 'Site Model From Boundary' give you a flat DTM?

[bgoff]

I use site model from boundary all the time!

[hollister design Studio]

@bgoff 

Cool, I'll try it again.

 

When I gave it a shot yesterday it slowed VW down so much I couldn't even draw a line!

 

Other files - with really complicated site models - where absolutely fine and when I deleted the site model I was good again on that file - so it probably was something about that particular site model instance.