Models in realistic Terrains and creation of roads

charly2008

Hi thomthom,

you are right. May be a ruby could be helpfull

Karlheinz

CadFather

i've been doing proper roads on terrains for some time - we teach it as part of our landscape masterclass..

last year there was talk of integrating some of these tricks commercially - as part of a landscape toolbox - eventually the programmer and i moved on to other things and nothing came out of it..

i'll see if i can make a video in the next few days on how to do it - it is quite a precise method, perhaps some may like to take on the task of automating parts of the process..

also, notice that Chris' ShapeBender script is quite amazing - you can create roads with it as well..

Max

charly2008

Hi cadfather,

your post sounds interesting. It would be nice to see your method. I took some snapshots form the net as an example streets which i mean.

Karlheinz

Chris Fullmer

Sold! I want to move there!

Chris

charly2008

Hi Chris,

is it possible to move this topic to the Sketchup discussions.

Karlheinz

CadFather

ok, i made the video.. (tried to embed here but didn't work)

anyway, go to my website: http://www.quarr-it.com under 'news' you will see the tutorial.
it's quick but should give you all you need to know

leave some comments if you like it (only positive of course!)

Max
SketchUp jedimaster!

matteo

hi Max,

great tutorial
thank you.

AcesHigh

one thing you should notice is that the roads DO NOT MATCH the terrain. Thats obvious. Road construction companies much do terraplaning before, etc. Its the TERRAIN which matches the road.

in other words, when doing a road on a terrain, dont worry if the road floats or gets "underground" in many places. That is supposed to happen if its a realistic road. What you have to worry is to make the TERRAIN match the road... that is... level the terrain up and down in the appropriate places.

if you create a 3d terrain mesh from a gray image, you should draw the road on that image. And paint it in one gray color. And then change slowly the road gray color as it moves along the terrain. When making the new image into a 3d Terrain Mesh, the "terraplaning" of the terrain will be ready for you to put a road over it

charly2008

Hi AcesHigh,

I agree with you in many points. But do you have a solution to create this in Sketchup?

Your last sentences i didn't understand

@aceshigh said:

if you create a 3d terrain mesh from a gray image, you should draw the road on that image. And paint it in one gray color. And then change slowly the road gray color as it moves along the terrain. When making the new image into a 3d Terrain Mesh, the "terraplaning" of the terrain will be ready for you to put a road over it

Karlheinz

thomthom

If you can create a smooth ramping set of edges, defining the centre lines of the road. Then use Follow Me and Keep to create the road surface, you could then use the Sandbox Tool's Stamp to set it into the terrain. It'll push the terrain down and up where needed.

charly2008

Hi Thomas,

attached you will find a skp file with a road created by FollowMe and keep. But i have a problem to edit the terrain or the road by the sandbox tool. I didn't exactly understand your explanation above. Could you please help me.

Karlheinz

Riedberg14.skp

mirjman

karl- I had trouble understanding what you are asking for.. Is one of the examples below correct? These are very fast/crude examples so I apologize if they are not clear.

charly2008

Hi Mirjam,

sorry if my english language is not perfect. What i'm asked for is a technique on how to create roads, Streets or pathes in a terrain which are seeming realistic. The problem is that Real roads or Streets in most cases do not run like a ribbon over the terrain surface. The Streets cut through the area in some places or they are running above the surface depending on the terrain. If the terrain is more mountainous you will have may be serpentines. The cross section should be horizontally.

In Sketchup you are only able to create horizontal roads with drape and stamp. By using the Follow Me and keep tool you can create a road along a line which is following the terrain surface but with horizontal cross section. But these methods are not yet satisfactory. A tool would be necessary where one can edit the parameters for the Roadway, Gradient, Descent, Curve radius and so on.

Karlheinz

solo

Karl, do you have the .dem info or the terrain you intend adding a road to available for upload?

If I get a chance (cannot promise) I will give it a go, and If I cannot then someone here will certainly take up the challenge.

CadFather

so what's wrong with my method?

charly2008

Hi Pete,

i don't have a special projekt for creating a road. It is a general question for any triangulated terrain. For example the attached terrain.

Karlheinz

Terrain from Vue

mirjman

i have to agree that max seems to have the solution you are looking for, but you could probably do most of the up-front work shown in the video with follow me tool??

troyhome

@charly2008 said:

Hi Pete,

i don't have a special projekt for creating a road. It is a general question for any triangulated terrain. For example the attached terrain.

Karlheinz

trippy terrain!

charly2008

Hi Max,

I do not claim your method to be wrong. But how would you use the method along the line in the valley in the attached skp so that it looks realistic?

Karlheinz

terrain from GE

solo

I did a very quick test using Vue to create a basic terrain, exported to SU, used Tools on the surface to draw a path, copied the path, welded it and used TIG's Extrude line, vector by 2 points ruby to create road, then used JPP to pull thickness. Exported the road to Vue and embedded into terrain, added texture a few tress and 2 cars.

I could have taken more time and made road smoother and more curvy with more segmented arches.

SU

Quick Vue render